CN213347989U - Back-washing pre-filter - Google Patents
Back-washing pre-filter Download PDFInfo
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- CN213347989U CN213347989U CN202021597592.7U CN202021597592U CN213347989U CN 213347989 U CN213347989 U CN 213347989U CN 202021597592 U CN202021597592 U CN 202021597592U CN 213347989 U CN213347989 U CN 213347989U
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Abstract
The utility model discloses a backwash pre-filter, which comprises a first bottle body, a second bottle body, a water guide joint and a pre-filter component, wherein the water guide joint and the second bottle body are respectively arranged at the top end and the bottom end of the first bottle body; the front-mounted filter assembly comprises a first filter screen, a second filter screen, an inner framework, a backwashing framework and a spray gun, the top end of the backwashing framework is fixed to a water guide joint, the top end of the backwashing framework abuts against the inner framework, the inner framework is fixed in the first bottle body, water through holes are formed in the side wall of the inner framework, the side wall of the backwashing framework and the side wall of the spray gun, the first filter screen is arranged on the outer side of the inner framework in a surrounding mode, the second filter screen is arranged on the outer side of the backwashing framework in a surrounding mode, and the spray gun moves along the inner cavity of the inner framework and the inner. The utility model discloses can reach the purpose that the filter effect is good, back flush is effectual and long service life.
Description
Technical Field
The utility model relates to a leading filter technical field especially relates to a back flush leading filter.
Background
Tap water can flow through more pipelines before entering a user's home, and various impurities can be mixed in when flowing through each pipeline, and the impurities can influence the health of the user on one hand and damage water consuming appliances on the other hand, so that a preposed filter is generally arranged on a user household source pipeline to filter the tap water. In order to realize the purpose of backwashing, a backwashing prefilter is arranged on the market, and comprises a valve body, a filter bottle, a drainage sealing element and a sewage discharge ball valve, wherein a filter mechanism is arranged in the filter bottle, and consists of a backwashing filter core assembly and an outer skeleton assembly; when the pre-filter is backwashed, the blowoff valve is opened, outside water passes through the switching flow passage, the filter screen is backwashed, and the filter screen is flushed and cleaned by water flow passing through the filter screen from inside to outside, so that the backwashing effect is realized. However, because the backwashing filter screen moves in the sealing framework, after long-time use, impurities accumulated on the filter screen and the backwashing filter screen gradually block the filter screen and the backwashing filter screen, and a large amount of impurities are accumulated at the water inlet end at the upper end of the filter core assembly; therefore, the backwashing effect is not good, and the service life of the pre-filter is influenced.
Disclosure of Invention
The utility model aims at: the utility model provides a back flush prefilter to reach the effectual and long service life's of back flush purpose.
In order to achieve the purpose, the utility model provides a backwashing prefilter, which comprises a first bottle body, a second bottle body, a water guide joint and a prefilter assembly, wherein the water guide joint and the second bottle body are respectively arranged at the top end and the bottom end of the first bottle body, the water guide joint is provided with a water inlet flow passage and a water outlet flow passage, the prefilter assembly is arranged in the first bottle body, and the second bottle body is provided with a drain valve and a first drain port;
the front-mounted filter assembly comprises a first filter screen, a second filter screen, an inner framework, a backwashing framework and a spray gun, wherein the top end of the backwashing framework is fixed to the water guide joint, the top end of the backwashing framework abuts against the inner framework, the inner framework is fixed to the first bottle body, water through holes are formed in the side wall of the inner framework, the side wall of the backwashing framework and the side wall of the spray gun, the first filter screen is arranged on the outer side of the inner framework in a surrounding mode, the second filter screen is arranged on the outer side of the backwashing framework in a surrounding mode, and the spray gun moves along the inner cavity of the inner framework and the inner cavity of the backwashing framework in the axial direction;
when the spray gun is positioned at the filtering position, the side wall of the upper part of the spray gun covers the water passing through hole of the backwashing framework, and external water flows to the water outlet channel of the water guide joint from the water inlet channel of the water guide joint, the water passing through hole of the inner framework, the inner cavity of the inner framework and the inner cavity of the backwashing framework in sequence; when the spray gun is located at the back flushing position, the spray gun covers the water inlet hole of the inner framework, and external water flows to the first water outlet of the second bottle body from the water inlet flow channel of the water guide joint, the water passing through hole of the back flushing framework, the inner cavity of the inner framework and the water passing through hole of the inner framework in sequence.
In some embodiments of the present application, the front filter assembly further includes an outer frame, a piston body, an elastic member, and a sealing gasket, the outer frame is fixed to the first bottle body, the sealing gasket is connected to the bottom end of the piston body, the top end of the piston body is connected to the bottom end of the spray gun, the piston body is provided with a cavity, and the piston body is provided with a second water outlet communicated with the cavity;
one end of the elastic piece is connected with the top of the cavity, and the other end of the elastic piece is connected with the bottom end of the outer framework.
In some embodiments of the application, a first shaft section and a positioning shaft located below the first shaft section are arranged at the upper part of the spray gun, the first shaft section is connected to the end face of the backwashing framework where the water passing through hole is located in a sliding manner, and the positioning shaft axially moves between the inner wall of the backwashing framework and the end face of the inner framework where the water inlet is located;
when the spray gun is located at the filtering position, the first shaft section covers the water passing through hole of the backwashing framework, and the positioning shaft abuts against the inner wall of the backwashing framework; when the spray gun is located at the backwashing position, the first shaft section does not cover the water passing through hole of the backwashing framework, the positioning shaft abuts against the end face of the inner framework where the water inlet is located, and the positioning shaft covers the water inlet of the inner framework.
In some embodiments of the present application, a second shaft section is provided in the middle of the spray gun, and the second shaft section is provided with a plurality of water passing through holes along the circumferential direction thereof.
In some embodiments of the present application, the lower part of the spray gun is provided with a third shaft section, the third shaft section is evenly provided with a plurality of water passing holes along the circumferential direction thereof, and the total area of the water passing holes of the third shaft section is smaller than the cross sectional area of the first shaft section.
In some embodiments of the present application, the water passing through hole is spirally arranged on the outer wall of the third shaft section, and the outer wall of the third shaft section is spirally provided with a water channel.
In some embodiments of the present application, the front filter assembly further comprises a water sprayer, the water sprayer is located in the inner frame and rotatably sleeved on the outer wall of the spray gun, and a plurality of water passing through holes are arranged on the outer side of the water sprayer along the circumferential direction of the water sprayer.
In some embodiments of the present application, the total area of the water passing holes of the plurality of said water jets is less than the total area of the water passing holes of the plurality of said third shaft sections.
In some embodiments of the present application, the outer wall of the sprinkler is provided with two water jet columns, the water through hole is provided in the water jet columns, and the two water jet columns are arranged asymmetrically with respect to the axis of the sprinkler.
In some embodiments of the present application, a plurality of support columns are annularly disposed at the bottom end of the backwash framework, and the support columns are abutted to the top end of the inner framework.
The embodiment of the utility model provides a back flush prefilter, it compares with prior art, and its beneficial effect lies in:
the utility model discloses back flush leading filter, the outside of inner frame is located to first filter screen ring, the outside of back flush skeleton is located to the second filter screen ring, therefore, first filter screen and second filter screen filter the impurity of external aquatic, impurity can't pass first filter screen and second filter screen and get into the inner chamber of inner frame and back flush skeleton, thereby the removal of the spray gun of being convenient for, and then the spray gun of being convenient for switches between filter state and back flush state, therefore, this back flush leading filter has back flush effectual, the filter effect is good and long service life's advantage.
Drawings
Fig. 1 is a schematic structural diagram of a backwash pre-filter in a filtering state according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the backwash pre-filter according to the embodiment of the present invention in a backwash state.
Fig. 3 is a schematic structural diagram of the pre-filter assembly according to the embodiment of the present invention in a filtering state.
Fig. 4 is a schematic structural diagram of the pre-filter assembly in a backwashing state according to the embodiment of the present invention.
Fig. 5 is an exploded view of a pre-filter assembly according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of the inner frame according to the embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a backwash framework according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a sprinkler according to an embodiment of the present invention.
Fig. 9 is a first schematic structural diagram of a spray gun according to an embodiment of the present invention.
Fig. 10 is a schematic structural view of a spray gun according to an embodiment of the present invention.
Fig. 11 is a schematic structural view of a piston body according to an embodiment of the present invention.
In the figure, 1, a first bottle body; 2. a second bottle body; 3. a water conducting joint; 4. a first filter screen; 5. a second filter screen; 6. an inner skeleton; 7. backwashing the framework; 8. a spray gun; 81. a first shaft section; 82. a second shaft section; 83. a third shaft section; 84. positioning the shaft; 9. an outer skeleton; 10. a piston body; 11. an elastic member; 12. a gasket; 13. a first drain port; 14. a second water discharge port; 15. a water channel; 16. a water sprayer; 17. a water spray column; 18. a support pillar; 19. a water passing through hole.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 to 11, a backwash pre-filter provided in accordance with a preferred embodiment of the present invention includes a first bottle 1, a second bottle 2, a water guide joint 3 and a pre-filter assembly, wherein the water guide joint 3 and the second bottle 2 are respectively disposed at the top end and the bottom end of the first bottle 1, the water guide joint 3 is provided with a water inlet channel and a water outlet channel, the pre-filter assembly is disposed in the first bottle 1, and the second bottle 2 is provided with a drain valve and a first drain port 13;
the front-mounted filter assembly comprises a first filter screen 4, a second filter screen 5, an inner framework 6, a backwashing framework 7 and a spray gun 8, the top end of the backwashing framework 7 is fixed to the water guide joint 3, the top end of the backwashing framework 7 abuts against the inner framework 6, the inner framework 6 is fixed to the first bottle body 1, water through holes 19 are formed in the side wall of the inner framework 6, the side wall of the backwashing framework 7 and the side wall of the spray gun 8, the first filter screen 4 is annularly arranged on the outer side of the inner framework 6, the second filter screen 5 is annularly arranged on the outer side of the backwashing framework 7, and the spray gun 8 axially moves along the inner cavity of the inner framework 6 and the inner cavity of the backwashing framework 7;
when the spray gun 8 is positioned at the filtering position, the side wall of the upper part of the spray gun 8 covers the water through hole 19 of the backwashing framework 7, and external water flows to the water outlet channel of the water guide joint 3 from the water inlet channel of the water guide joint 3, the water through hole 19 of the inner framework 6, the inner cavity of the inner framework 6 and the inner cavity of the backwashing framework 7 in sequence; when the spray gun 8 is located at the back flushing position, the spray gun 8 covers the water inlet hole of the inner framework 6, and the external water flows to the first water outlet 13 of the second bottle body 2 from the water inlet flow channel of the water guide joint 3, the water passing through hole 19 of the back flushing framework 7, the inner cavity of the inner framework 6 and the water passing through hole 19 of the inner framework 6 in sequence.
Based on the above setting, the utility model discloses leading filter of back flush, the outside of inner frame 6 is located to first filter screen 4 ring, the outside of back flush skeleton 7 is located to second filter screen 5 ring, therefore, first filter screen 4 and second filter screen 5 filter the impurity of external aquatic, impurity can't pass first filter screen 4 and second filter screen 5 and get into inner frame 6 and back flush skeleton 7's inner chamber, thereby be convenient for spray gun 8's removal, and then be convenient for spray gun 8 and switch between filter state and back flush state, therefore, this leading filter of back flush has back flush effectual, the filter effect is good and long service life's advantage.
In some embodiments, optionally, as shown in fig. 1, 2, 3, 4, 5 and 11, in order to facilitate the switching of the spray gun 8 between the filtering position and the backwashing position, the pre-filter assembly further comprises an outer frame 9, a piston body 10, a sealing gasket 12 and an elastic member 11, wherein the outer frame 9 is fixed to the first bottle body 1, the top end of the piston body 10 is connected to the bottom end of the spray gun 8, the sealing gasket 12 is connected to the bottom end of the piston body 10, the piston body 10 is provided with a cavity, and the piston body 10 is provided with a second water outlet 14 communicated with the cavity; one end of the elastic part 11 is connected with the top of the cavity, and the other end of the elastic part 11 is connected with the bottom end of the outer framework 9. Therefore, when the elastic element 11 is located at the filtering position, the elastic element 11 is in an extending state, the side wall of the upper part of the spray gun 8 covers the water passing through hole 19 of the backwashing framework 7, and the outside water flows to the water outlet channel of the water guide joint 3 from the water inlet channel of the water guide joint 3, the water passing through hole 19 of the inner framework 6, the inner cavity of the inner framework 6 and the inner cavity of the backwashing framework 7 in sequence;
when the blowoff valve of the second bottle body 2 is opened, the pressure of the second water outlet 14 is far smaller than the pressure of the pipeline at the opening moment of the blowoff valve, the pressure difference between the second water outlet 14 and the pipeline acts on the sealing gasket 12 to promote the piston body 10 to drive the spray gun 8 to move up and down, the elastic piece 11 is in a compression state, the spray gun 8 covers the water passing through hole 19 of the inner framework 6, and the outside water sequentially flows to the first water outlet 13 of the second bottle body 2 from the water inlet flow channel of the water guide joint 3, the water passing through hole 19 of the backwashing framework 7, the inner cavity of the inner framework 6, the water passing through hole 19 of the inner framework 6 and the second water outlet 14 of the piston body 10, so that the;
in addition, the elastic piece 11 is arranged between the piston body 10 and the bottom end of the outer framework 9, so that a space is made for the upper parts of the inner framework 6 and the back washing framework 7, and further, the back washing prefilter can realize more functions, such as the scraping function of the first filter screen 4 and the second filter screen 5, and can not block the entering of outside water;
in addition, the elastic part 11 can move between the piston body 10 and the bottom end of the outer framework 9, namely a cavity is formed between the piston body 10 and the bottom end of the outer framework 9, so that dirt can be stored in the cavity, and after the blowoff valve is opened, the dirt is discharged along with outside water, so that the dirt cannot be accumulated at the front end of the filtering channel for a long time to influence the water pressure and the flow of a tail end pipeline, and the situation that the elastic part 11 cannot move due to dirt accumulation can be avoided; furthermore, the service life of the backwashing prefilter is longer.
In some embodiments, optionally, as shown in fig. 9 and 10, the upper part of the spray gun 8 is provided with a first shaft section 81 and a positioning shaft 84 positioned below the first shaft section 81, the first shaft section 81 is slidably connected to the end surface of the backwashing framework 7 where the water through hole 19 is positioned, and the positioning shaft 84 axially moves between the inner wall of the backwashing framework 7 and the end surface of the inner framework 6 where the water inlet is positioned; when the spray gun 8 is positioned at the filtering position, the first shaft section 81 covers the water through hole 19 of the backwashing framework 7, and the positioning shaft 84 abuts against the inner wall of the backwashing framework 7; when the spray gun 8 is located at the backwashing position, the first shaft section 81 does not cover the water passing through hole 19 of the backwashing framework 7, the positioning shaft 84 abuts against the end face of the inner framework 6 where the water inlet is located, and the positioning shaft 84 covers the water inlet of the inner framework 6. Thus, the up and down movement of the first shaft section 81 and the positioning shaft 84 causes ambient water to flow only from the water inlet of the inner frame 6 or from the water passage holes 19 of the backwash frame 7 at a time, so that the lance 8 is switched between the filtering position and the backwash position.
In some embodiments, optionally, as shown in fig. 9 and 10, the middle of the lance 8 is provided with a second shaft section 82, and the second shaft section 82 is provided with a plurality of water passing holes 19 along the circumference thereof. Therefore, the external water filtered by the first filter screen 4 enters the inner cavity of the spray gun 8 from the water through hole 19 of the second shaft section 82, so that the external water can flow into the tail end pipeline conveniently;
in addition, the inner wall of the second shaft section 82 is provided with a plurality of reinforcing ribs, and the reinforcing ribs not only can enhance the strength of the second shaft section 82, but also can play a role in shunting.
In some embodiments, optionally, as shown in fig. 3 and 4, the sprinkler 16 is secured to the endoskeleton 6.
In some embodiments, optionally, as shown in fig. 8, 9 and 10, the pre-filter assembly further includes a water sprayer 16, the water sprayer 16 is located on the inner framework 6 and rotatably sleeved on the outer wall of the spray gun 8, the outer side of the water sprayer 16 is provided with a plurality of water through holes 19 along the circumferential direction thereof, and the total area of the water through holes 19 of the plurality of water sprayers 16 is smaller than the cross-sectional area of the first shaft section 81; the lower part of the spray gun 8 is provided with a third shaft section 83, the third shaft section 83 is uniformly provided with a plurality of water through holes 19 along the circumferential direction, and the total area of the water through holes 19 of the third shaft section 83 is larger than that of the water through holes 19 of the water sprayers 16. Therefore, the inner frame 6 is fixed relative to the outer frame 9, the water sprayer 16 is fixed relative to the inner frame 6, the spray gun 8 moves downwards, the outside water enters the inner cavity of the water sprayer 16 from the water passing through holes 19 of the third shaft section 83, the total area of the water passing through holes 19 of the third shaft section 83 is larger than that of the water passing through holes 19 of the water sprayer 16 due to the fact that the cross-sectional area of the first shaft section 81 is larger than that of the water passing through holes 19 of the third shaft section 83, and the total area of the water passing through holes 19 of the third shaft section 83 is larger than that of the water passing through holes 19 of the water sprayer 16, so that when the outside water is sprayed outwards from the water sprayer 16, the pressure of the outside water is accelerated to be sprayed on the inner wall of the first filter screen 4 through the water sprayer 16, impurities adsorbed on the first filter.
In some embodiments, optionally, as shown in fig. 8, the outer wall of the sprinkler 16 is provided with two water jet columns 17, the water through holes 19 are provided on the water jet columns 17, and the two water jet columns 17 are asymmetrically arranged relative to the axis of the sprinkler 16, so that the ambient water can spirally flow in the sprinkler 16, and the capability of the ambient water to be sprayed outwards is enhanced.
In some embodiments, optionally, as shown in fig. 9 and 10, the water passing hole 19 is spirally arranged on the outer wall of the third shaft section 83, and the outer wall of the third shaft section 83 is spirally provided with the water channel 15. Accordingly, the external water flowing out of the water through hole 19 of the third shaft section 83 enters the waterway 15, and the waterway 15 accelerates the flow of the external water.
In some embodiments, optionally, as shown in fig. 9 and 10, the water passing holes 19 of the third shaft section 83 may be arranged in an annular array or in a spiral arrangement.
In some embodiments, the water passage hole 19 of the third shaft section 83 may alternatively be rectangular or rectangular in cross-section, as shown in fig. 9 and 10.
In some embodiments, optionally, as shown in fig. 7, the bottom end of the backwash framework 7 is provided with a plurality of support columns 18 in a circle, and the support columns 18 abut against the top end of the inner framework 6, so as to facilitate the connection of the backwash framework 7 and the inner framework 6.
In some embodiments, optionally, as shown in fig. 3 and 4, steel rings are respectively connected to the top end and the bottom end of the first filter 4, so as to enhance the strength of the first filter 4.
To sum up, the utility model discloses leading filter of back flush, the outside of inner frame 6 is located to first filter screen 4 ring, the outside of back flush skeleton 7 is located to second filter screen 5 ring, therefore, first filter screen 4 and second filter screen 5 filter the impurity of external aquatic, impurity can't pass first filter screen 4 and second filter screen 5 and get into inner frame 6 and back flush skeleton 7's inner chamber, thereby be convenient for spray gun 8's removal, and then be convenient for spray gun 8 and switch between filter state and back flush state, therefore, this leading filter of back flush has back flush effectual, the filter effect is good and long service life's advantage.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A backwashing prefilter is characterized by comprising a first bottle body, a second bottle body, a water guide joint and a prefilter assembly, wherein the water guide joint and the second bottle body are respectively arranged at the top end and the bottom end of the first bottle body;
the front-mounted filter assembly comprises a first filter screen, a second filter screen, an inner framework, a backwashing framework and a spray gun, wherein the top end of the backwashing framework is fixed on the water guide joint, the top end of the backwashing framework abuts against the inner framework, the inner framework is fixed in the first bottle body, water through holes are formed in the side wall of the inner framework, the side wall of the backwashing framework and the side wall of the spray gun, the first filter screen is arranged on the outer side of the inner framework in a surrounding manner, the second filter screen is arranged on the outer side of the backwashing framework in a surrounding manner, and the spray gun moves along the inner cavity of the inner framework and the inner cavity of the backwashing framework in the axial direction;
when the spray gun is positioned at the filtering position, the side wall of the upper part of the spray gun covers the water passing through hole of the backwashing framework, and external water flows to the water outlet channel of the water guide joint from the water inlet channel of the water guide joint, the water passing through hole of the inner framework, the inner cavity of the inner framework and the inner cavity of the backwashing framework in sequence; when the spray gun is located at the back flushing position, the spray gun covers the water inlet hole of the inner framework, and external water flows to the first water outlet of the second bottle body from the water inlet flow channel of the water guide joint, the water passing through hole of the back flushing framework, the inner cavity of the inner framework and the water passing through hole of the inner framework in sequence.
2. The backwashing pre-filter of claim 1, wherein the pre-filter assembly further comprises an outer frame, a piston body, an elastic member and a gasket, the outer frame is fixed on the first bottle body, the gasket is connected to the bottom end of the piston body, the top end of the piston body is connected to the bottom end of the spray gun, the piston body is provided with a cavity, and the piston body is provided with a second water outlet communicated with the cavity;
one end of the elastic piece is connected with the top of the cavity, and the other end of the elastic piece is connected with the bottom end of the outer framework.
3. The backwashing prefilter of claim 2 wherein a first shaft section and a positioning shaft are provided at the upper part of said lance, said first shaft section being slidably connected to the end face of said backwashing framework at which said water passing hole is located, said positioning shaft being axially movable between the inner wall of said backwashing framework and the end face of said inner framework at which said water inlet is located;
when the spray gun is located at the filtering position, the first shaft section covers the water passing through hole of the backwashing framework, and the positioning shaft abuts against the inner wall of the backwashing framework; when the spray gun is located at the backwashing position, the first shaft section does not cover the water passing through hole of the backwashing framework, the positioning shaft abuts against the end face of the inner framework where the water inlet is located, and the positioning shaft covers the water inlet of the inner framework.
4. The backwash pre-filter as set forth in claim 3, wherein a second shaft section is provided in the middle of the lance, and the second shaft section is provided with a plurality of water passing holes along the circumferential direction thereof.
5. The backwash pre-filter according to claim 4, wherein the lower part of the lance is provided with a third shaft section, the third shaft section is uniformly provided with a plurality of water passing holes along the circumferential direction, and the total area of the water passing holes of the third shaft section is smaller than the cross-sectional area of the first shaft section.
6. The backwash pre-filter as set forth in claim 5, wherein the water passage hole is spirally arranged on the outer wall of the third shaft section, and the outer wall of the third shaft section is spirally provided with a water passage.
7. The backwash pre-filter according to claim 5, wherein the pre-filter assembly further comprises a water sprayer which is positioned on the inner frame and rotatably sleeved on the outer wall of the spray gun, and a plurality of water passing through holes are formed in the outer side of the water sprayer along the circumferential direction of the water sprayer.
8. The backflushing prefilter according to claim 7 wherein the total area of the plurality of water jets' water flow apertures is less than the total area of the plurality of third shaft section water flow apertures.
9. The backwash prefilter according to claim 8 wherein said outer wall of said water jet is provided with two water jet posts, said water through holes are provided in said water jet posts, and said two water jet posts are arranged asymmetrically with respect to the axis of said water jet.
10. The backwash pre-filter as set forth in claim 2, wherein a plurality of support columns are provided around the bottom end of the backwash framework, the support columns abutting against the top end of the inner framework.
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| CN202021597592.7U CN213347989U (en) | 2020-08-04 | 2020-08-04 | Back-washing pre-filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975874A (en) * | 2021-11-10 | 2022-01-28 | 台州浙涛水控科技有限公司 | Back flush filter |
| CN115300989A (en) * | 2022-07-26 | 2022-11-08 | 山东省农业科学院作物研究所 | A novel pipeline filters device for wheat liquid manure integration is carried |
-
2020
- 2020-08-04 CN CN202021597592.7U patent/CN213347989U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975874A (en) * | 2021-11-10 | 2022-01-28 | 台州浙涛水控科技有限公司 | Back flush filter |
| CN115300989A (en) * | 2022-07-26 | 2022-11-08 | 山东省农业科学院作物研究所 | A novel pipeline filters device for wheat liquid manure integration is carried |
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| GR01 | Patent grant |