CN209662800U - A kind of environmental monitoring water sample rapid filtering device - Google Patents

A kind of environmental monitoring water sample rapid filtering device Download PDF

Info

Publication number
CN209662800U
CN209662800U CN201920369770.1U CN201920369770U CN209662800U CN 209662800 U CN209662800 U CN 209662800U CN 201920369770 U CN201920369770 U CN 201920369770U CN 209662800 U CN209662800 U CN 209662800U
Authority
CN
China
Prior art keywords
multiple groups
hole
water sample
vertical tube
environmental monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201920369770.1U
Other languages
Chinese (zh)
Inventor
周赛军
邓仁健
任伯帜
侯保林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan University of Science and Technology
Original Assignee
Hunan University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan University of Science and Technology filed Critical Hunan University of Science and Technology
Priority to CN201920369770.1U priority Critical patent/CN209662800U/en
Application granted granted Critical
Publication of CN209662800U publication Critical patent/CN209662800U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Sampling And Sample Adjustment (AREA)

Abstract

The utility model relates to the technical field of environmental monitoring auxiliary equipment, more particularly to a kind of environmental monitoring water sample rapid filtering device, the case where can preventing gauze strainer from being blocked by the impurity in water sample, use reliability is improved;Including filtering tank, filtering tank is internally provided with working chamber;It further include vertical tube and water inlet pipe, partition is horizontally arranged in the middle part of working chamber, and the first round hole is provided in the middle part of partition, the top middle portion of filtering tank is provided with the second round hole, thread groove is provided in the middle part of the inner bottom wall of working chamber, the lateral wall bottom of vertical tube is provided with external thread structure, upper half area in vertical tube is horizontally arranged with filter screen, multiple groups right baffle-plate and multiple groups right shell body are horizontally arranged in vertical tube, the left end of multiple groups right baffle-plate is provided with left through-hole up and down, the right end of multiple groups right shell body is provided with right through-hole up and down, it further include fixed strainer, sliding screen, gauze strainer, multiple groups Elastic buckle, drainpipe, drain valve and removable cover.

Description

A kind of environmental monitoring water sample rapid filtering device
Technical field
The utility model relates to the technical fields of environmental monitoring auxiliary equipment, more particularly to a kind of environmental monitoring water sample Product rapid filtering device.
Background technique
It is well known that environmental monitoring is a kind of for environmental monitoring with water sample rapid filtering device, filter out in water sample Impurity, the convenient auxiliary device being monitored to the water quality situation of water sample obtained wide in the field of environmental monitoring General use;Existing environmental monitoring water sample rapid filtering device includes filtering tank, and filtering tank is internally provided with work Chamber, and two groups of filter screens are horizontally arranged in working chamber, and be provided with gauze strainer between two groups of filter screens, filtering tank Top is provided with water inlet, and the bottom end of filtering tank is provided with drainpipe, and drain valve is provided at drainpipe;Existing environment Monitoring water sample rapid filtering device passes through gauze strainer pair in use, water sample is directed into working chamber from water inlet Impurity in water sample is filtered, and water sample is made to become clarification, and the water by filtering is exported from drainpipe, then to water sample Water quality situation is monitored;Existing environmental monitoring finds in water sample rapid filtering device use, water sample compared with When muddy, it is easy to result in blockage to gauze strainer, influences the filter effect to water, cause use reliability lower.
Utility model content
Gauze strainer can be prevented by the impurity in water sample in order to solve the above technical problems, the utility model provides one kind The case where blocking, improves the environmental monitoring water sample rapid filtering device of use reliability.
A kind of environmental monitoring water sample rapid filtering device of the utility model, including filtering tank, the inside of filtering tank It is provided with working chamber;Further include vertical tube and water inlet pipe, partition is horizontally arranged in the middle part of the working chamber, and at the middle part of partition It is provided with the first round hole, the top middle portion of filtering tank is provided with the second round hole, and it is round that second round hole is located at first The inner bottom wall middle part of the surface in hole, the working chamber is provided with thread groove, and the lateral wall bottom of the vertical tube is provided with outer spiral shell Line structure, the top of the bottom end inherent filtration tank of the vertical tube pass through the second round hole and stretch in working chamber and pass through the first circle Spiral shell dress is inserted into thread groove behind hole, and the upper half area in vertical tube is horizontally arranged with filter screen, is horizontally arranged in vertical tube Multiple groups right baffle-plate and multiple groups right shell body, the multiple groups right baffle-plate and the setting of multiple groups right shell body interval, and on a left side for multiple groups right baffle-plate End is provided with left through-hole up and down, and the right end of multiple groups right shell body is provided with right through-hole up and down, vertical tube side wall Upper half area be provided with multiple groups apopore, the multiple groups apopore is located in same level, and the equal position of multiple groups apopore In the top of filter screen, the top of the bottom end inherent filtration net of the water inlet pipe passes through and passes through multiple groups right baffle-plate and multiple groups right shell body To the bottom of working chamber, annular through-hole, the annular through-hole and the first round hole concentric are provided on the partition, and in ring Fixed strainer, sliding screen and gauze strainer are provided in shape through-hole, the fixed strainer, sliding screen and gauze strainer are Ring structure, fixed strainer are fixedly installed in annular through-hole, and the gauze strainer is located at the top of fixed strainer, the activity Strainer is located at the top of gauze strainer, and sliding screen and fixed strainer clamp gauze strainer, set on the outside of sliding screen It is equipped with multiple groups Elastic buckle, multiple groups card slot is provided on the inner sidewall of the annular through-hole, the multiple groups Elastic buckle blocks respectively Loaded in multiple groups card slot, the right end bottom of the filtering tank is provided with drainpipe, and drain valve is provided at drainpipe, filtering The top roof of tank is removable cover, and the removable cover lid is loaded on the top of filtering tank.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the inner ring setting of first round hole There is rubber weather strip, the inner ring of the rubber weather strip and the lateral wall of vertical tube are adjacent to.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the partition are located at multiple groups apopore Lower section.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the filter screen include flexible fastening ring And the metal mesh of flexible fastening ring inner ring, restraining position ring block and multiple groups arc-shaped limit protrusion are set on the inner sidewall of the vertical tube, The multiple groups arc-shaped limit protrusion is respectively positioned on the top of stop collar, and the bottom end of the flexible fastening ring and the top of stop collar are pasted Tightly, top of the bottom end of the multiple groups arc-shaped limit protrusion with flexible fastening ring is adjacent to.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the front left side of the filtering tank bottom end, Forward right side, left rear side and right lateral side are provided with pulley blocks.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the left end of the filtering tank and right end are equal It is provided with handle.
A kind of environmental monitoring water sample rapid filtering device of the utility model, further includes sink, the bottom of the sink End is provided with and communicated with conical pipe, and the bottom end of the conical pipe is inserted into inside the top of water inlet pipe.
A kind of environmental monitoring water sample rapid filtering device of the utility model is provided on the side wall of the filtering tank Peep hole, the peep hole is communicated with working chamber, and transparent baffle is provided in peep hole.
Compared with prior art the utility model has the following beneficial effects: water sample to be directed into from water inlet pipe to the bottom in vertical tube Portion, water rise in the bottom of vertical tube, are intercepted by multiple groups right baffle-plate and multiple groups right shell body to water sample, increase the rising of water Length of flow, and the rising of water sample calmness can be allow, water sample is a part of miscellaneous in water during upwards Matter removes a part of impurity since self gravity deposits, by itself precipitating of impurity, then falls one by filter screen filtration Divide impurity, the water sample in vertical tube enters the outside of vertical tube by multiple groups apopore, carries out by gauze strainer to water sample deep It spends filter, removes the impurity in water sample, the case where by that can prevent gauze strainer from being blocked by the impurity in water sample, improve Use reliability can replace gauze strainer by dismantling active filters net, improve practicability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model;
Fig. 2 is partial enlargement structural representation at the A of the utility model Fig. 1;
Fig. 3 is the schematic perspective view of the utility model filtering tank;
Fig. 4 is the schematic perspective view of the utility model vertical tube;
Fig. 5 is the schematic perspective view of the utility model partition;
It is attached marked in the figure: 1, filtering tank;2, vertical tube;3, water inlet pipe;4, partition;5, the first round hole;6, the second round hole; 7, external thread structure;8, right baffle-plate;9, right shell body;10, Zuo Tongkong;11, right through-hole;12, apopore;13, fixed strainer;14, Sliding screen;15, gauze strainer;16, drainpipe;17, drain valve;18, removable cover;19, rubber weather strip;20, elasticity is solid Determine ring;21, metal mesh;22, stop collar;23, arc-shaped limit protrusion;24, pulley blocks;25, handle;26, sink;27, conical pipe; 28, transparent baffle;29, Elastic buckle;30, card slot.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
As shown in Figures 1 to 5, a kind of environmental monitoring water sample rapid filtering device of the utility model, including filtering Tank 1, filtering tank 1 are internally provided with working chamber;Further include vertical tube 2 and water inlet pipe 3, is horizontally arranged with partition in the middle part of working chamber 4, and the middle part of partition 4 is provided with the first round hole 5, the top middle portion of filtering tank 1 is provided with the second round hole 6, the second circle Shape hole 6 is located at the surface of the first round hole 5, is provided with thread groove, the lateral wall bottom of vertical tube 2 in the middle part of the inner bottom wall of working chamber It is provided with external thread structure 7, the top of the bottom end inherent filtration tank 1 of vertical tube 2 passes through the second round hole 6 and stretches in working chamber and wear Spiral shell dress is inserted into thread groove after crossing the first round hole 5, and the upper half area in vertical tube 2 is horizontally arranged with filter screen, vertical tube 2 It is inside horizontally arranged with multiple groups right baffle-plate 8 and multiple groups right shell body 9, multiple groups right baffle-plate 8 and the setting of the interval of multiple groups right shell body 9, and more The left end of group right baffle-plate 8 is provided with left through-hole 10 up and down, and the right end of multiple groups right shell body 9 is provided with up and down Right through-hole 11, the upper half area of 2 side wall of vertical tube are provided with multiple groups apopore 12, and multiple groups apopore 12 is located in same level, And multiple groups apopore 12 is respectively positioned on the top of filter screen, and the top of the bottom end inherent filtration net of water inlet pipe 3 passes through and passes through multiple groups Right baffle-plate 8 and multiple groups right shell body 9 are provided with annular through-hole, annular through-hole and the first round hole on partition 4 to the bottom of working chamber 5 concentrics, and fixed strainer 13, sliding screen 14 and gauze strainer 15 are provided in annular through-hole, fixed strainer 13, activity Strainer 14 and gauze strainer 15 are ring structure, and fixed strainer 13 is fixedly installed in annular through-hole, and gauze strainer 15 is located at The top of fixed strainer 13, sliding screen 14 is located at the top of gauze strainer 15, and sliding screen 14 and fixed strainer 13 will Gauze strainer 15 clamps, and the outside of sliding screen 14 is provided with multiple groups Elastic buckle 29, is provided on the inner sidewall of annular through-hole Multiple groups card slot 30, multiple groups Elastic buckle 29 are installed in respectively in multiple groups card slot 30, and the right end bottom of filtering tank 1 is provided with drainpipe 16, and drain valve 17 is provided at drainpipe 16, the top roof of filtering tank 1 is removable cover 18, the lid dress of removable cover 18 In the top of filtering tank 1;Water sample is directed into the bottom in vertical tube from water inlet pipe, water rises in the bottom of vertical tube, by more Group right baffle-plate and multiple groups right shell body intercept water sample, increase the length of flow of the rising of water, and can make water sample Rising that can be tranquil, for water sample during upwards, a part of impurity in water passes through impurity since self gravity deposits Itself precipitating remove a part of impurity, a part of impurity is then fallen by filter screen filtration, the water sample in vertical tube passes through more Group apopore enters the outside of vertical tube, carries out depth-type filtration to water sample by gauze strainer, removes the impurity in water sample, lead to The case where can preventing gauze strainer from being blocked by the impurity in water sample is spent, use reliability is improved, by by active filters net Disassembly, can replace gauze strainer, improve practicability.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the inner ring of the first round hole 5 are provided with The lateral wall of rubber weather strip 19, the inner ring and vertical tube 2 of rubber weather strip 19 is adjacent to;Guarantee vertical tube and the by rubber weather strip Sealing effect at one round hole.
A kind of environmental monitoring water sample rapid filtering device of the utility model, partition 4 are located at multiple groups apopore 12 Lower section;Guarantee top of the water in vertical tube from apopore outflux to partition, then water sample is carried out by gauze strainer deep Spend filter.
A kind of environmental monitoring water sample rapid filtering device of the utility model, filter screen include flexible fastening ring 20 with And the metal mesh 21 of 20 inner ring of flexible fastening ring, restraining position ring block 22 and multiple groups arc-shaped limit protrusion are set on the inner sidewall of vertical tube 2 23, multiple groups arc-shaped limit protrusion 23 is respectively positioned on the top of stop collar 22, the bottom end of flexible fastening ring 20 and the top of stop collar 22 It is adjacent to, top of the bottom end of multiple groups arc-shaped limit protrusion 23 with flexible fastening ring 20 is adjacent to;It is installed in by spring fixed ring It is convenient that filter screen is dismantled between stop collar and multiple groups arc-shaped limit protrusion, so that convenient clean filter screen.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the front left side of 1 bottom end of filtering tank, it is right before Side, left rear side and right lateral side are provided with pulley blocks 24;It is moved by the way that pulley blocks are convenient.
A kind of environmental monitoring water sample rapid filtering device of the utility model, the left end of filtering tank 1 and right end are all provided with It is equipped with handle 25;It is moved by the way that handle is convenient.
A kind of environmental monitoring water sample rapid filtering device of the utility model further includes sink 26, the bottom of sink 26 End is provided with and communicated with conical pipe 27, and the bottom end of conical pipe 27 is inserted into inside the top of water inlet pipe 3;Pass through sink and conical pipe side Just it directs water into vertical tube, improves practicability.
A kind of environmental monitoring water sample rapid filtering device of the utility model is provided with sight on the side wall of filtering tank 1 Hole is examined, peep hole is communicated with working chamber, and transparent baffle 28 is provided in peep hole;It can be in working chamber by peep hole The turbidity of water sample is observed.
A kind of environmental monitoring water sample rapid filtering device of the utility model completes above-mentioned move at work Before work, it is moved into the position of user's needs first, it can be moved by handle, it can also be by pulley blocks to it It is slided, water sample is directed into the bottom in vertical tube from water inlet pipe, water rises in the bottom of vertical tube, passes through multiple groups right baffle-plate Water sample is intercepted with multiple groups right shell body, increases the length of flow of the rising of water, and water sample can be allow tranquil Rising, water sample during upwards, a part of impurity in water since self gravity deposits, pass through impurity itself is heavy It forms sediment and removes a part of impurity, a part of impurity is then fallen by filter screen filtration, the water sample in vertical tube passes through multiple groups apopore Into the outside of vertical tube, depth-type filtration is carried out to water sample by gauze strainer, removes the impurity in water sample, by can be to prevent The case where only gauze strainer is blocked by the impurity in water sample improves use reliability, can be with by dismantling active filters net Gauze strainer is replaced, practicability is improved, the sealing effect at vertical tube and the first round hole is guaranteed by rubber weather strip, Guarantee top of the water in vertical tube from apopore outflux to partition, depth mistake is then carried out to water sample by gauze strainer Filter is installed between stop collar and multiple groups arc-shaped limit protrusion by spring fixed ring, convenient to dismantle to filter screen, thus It is convenient that filter screen is cleaned, it is conveniently directed water into vertical tube by sink and conical pipe, improves practicability, pass through observation Hole can observe the turbidity of water sample in working chamber, open drain valve, and the water sample by filtering is arranged from drainpipe Out, the water quality of water sample is detected.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change It also should be regarded as the protection scope of the utility model into modification.

Claims (8)

1. a kind of environmental monitoring water sample rapid filtering device, including filtering tank (1), filtering tank (1) are internally provided with work Make chamber;It is characterized in that, further including vertical tube (2) and water inlet pipe (3), it is horizontally arranged in the middle part of the working chamber partition (4), and It is provided in the middle part of partition (4) the first round hole (5), the top middle portion of filtering tank (1) is provided with the second round hole (6), institute The surface that the second round hole (6) are located at the first round hole (5) is stated, is provided with thread groove in the middle part of the inner bottom wall of the working chamber, The lateral wall bottom of the vertical tube (2) is provided with external thread structure (7), the top of the bottom end inherent filtration tank (1) of the vertical tube (2) It is stretched in working chamber across the second round hole (6) and spiral shell dress is inserted into thread groove afterwards across the first round hole (5), and perpendicular Upper half area in pipe (2) is horizontally arranged with filter screen, is horizontally arranged with multiple groups right baffle-plate (8) and the right gear of multiple groups in vertical tube (2) Plate (9), the multiple groups right baffle-plate (8) and the setting of multiple groups right shell body (9) interval, and be respectively provided in the left end of multiple groups right baffle-plate (8) There is left through-hole (10) up and down, the right end of multiple groups right shell body (9) is provided with right through-hole (11) up and down, vertical tube (2) upper half area of side wall is provided with multiple groups apopore (12), and the multiple groups apopore (12) is located in same level, and Multiple groups apopore (12) is respectively positioned on the top of filter screen, and the top of the bottom end inherent filtration net of the water inlet pipe (3) passes through and passes through Multiple groups right baffle-plate (8) and multiple groups right shell body (9) are provided with annular through-hole, the ring on the partition (4) to the bottom of working chamber Shape through-hole and the first round hole (5) concentric, and fixed strainer (13), sliding screen (14) and yarn are provided in annular through-hole Cloth strainer (15), the fixed strainer (13), sliding screen (14) and gauze strainer (15) are ring structure, fixed strainer (13) it is fixedly installed in annular through-hole, the gauze strainer (15) is located at the top of fixed strainer (13), the sliding screen (14) it is located at the top of gauze strainer (15), and sliding screen (14) and fixed strainer (13) clamp gauze strainer (15), It is provided on the outside of sliding screen (14) multiple groups Elastic buckle (29), is provided with multiple groups card slot on the inner sidewall of the annular through-hole (30), the multiple groups Elastic buckle (29) is installed in respectively in multiple groups card slot (30), the right end bottom setting of the filtering tank (1) Have drainpipe (16), and be provided with drain valve (17) at drainpipe (16), the top roof of filtering tank (1) is removable cover (18), removable cover (18) lid is loaded on the top of filtering tank (1).
2. a kind of environmental monitoring water sample rapid filtering device as described in claim 1, which is characterized in that first circle The inner ring in shape hole (5) is provided with rubber weather strip (19), and the inner ring of the rubber weather strip (19) and the lateral wall of vertical tube (2) paste Tightly.
3. a kind of environmental monitoring water sample rapid filtering device as claimed in claim 2, which is characterized in that the partition (4) it is located at the lower section of multiple groups apopore (12).
4. a kind of environmental monitoring water sample rapid filtering device as claimed in claim 3, which is characterized in that the filter screen Metal mesh (21) including flexible fastening ring (20) and flexible fastening ring (20) inner ring is set on the inner sidewall of the vertical tube (2) It is equipped with stop collar (22) and multiple groups arc-shaped limit is raised (23), the multiple groups arc-shaped limit raised (23) is respectively positioned on stop collar (22) Top, the bottom end of the flexible fastening ring (20) and the top of stop collar (22) be adjacent to, the multiple groups arc-shaped limit protrusion (23) top of the bottom end with flexible fastening ring (20) is adjacent to.
5. a kind of environmental monitoring water sample rapid filtering device as claimed in claim 4, which is characterized in that the filtering tank (1) front left side, forward right side, left rear side and right lateral side of bottom end are provided with pulley blocks (24).
6. a kind of environmental monitoring water sample rapid filtering device as claimed in claim 5, which is characterized in that the filtering tank (1) left end and right end is provided with handle (25).
7. a kind of environmental monitoring water sample rapid filtering device as claimed in claim 6, which is characterized in that further include sink (26), the bottom end of the sink (26) is provided with and communicated with conical pipe (27), and the bottom end of the conical pipe (27) is inserted into water inlet pipe (3) inside top.
8. a kind of environmental monitoring water sample rapid filtering device as claimed in claim 7, which is characterized in that the filtering tank (1) peep hole is provided on side wall, the peep hole is communicated with working chamber, and transparent baffle is provided in peep hole (28)。
CN201920369770.1U 2019-03-21 2019-03-21 A kind of environmental monitoring water sample rapid filtering device Expired - Fee Related CN209662800U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920369770.1U CN209662800U (en) 2019-03-21 2019-03-21 A kind of environmental monitoring water sample rapid filtering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920369770.1U CN209662800U (en) 2019-03-21 2019-03-21 A kind of environmental monitoring water sample rapid filtering device

Publications (1)

Publication Number Publication Date
CN209662800U true CN209662800U (en) 2019-11-22

Family

ID=68572453

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920369770.1U Expired - Fee Related CN209662800U (en) 2019-03-21 2019-03-21 A kind of environmental monitoring water sample rapid filtering device

Country Status (1)

Country Link
CN (1) CN209662800U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112893451A (en) * 2021-01-14 2021-06-04 湖南科技大学 Biological leaching equipment for treating heavy metal pollution of soil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112893451A (en) * 2021-01-14 2021-06-04 湖南科技大学 Biological leaching equipment for treating heavy metal pollution of soil
CN112893451B (en) * 2021-01-14 2022-06-10 湖南科技大学 Biological leaching equipment for treating heavy metal pollution of soil

Similar Documents

Publication Publication Date Title
EP0198496A1 (en) Washing machine, particularly dishwashing machine, provided with a self-cleaning filter
CN111054115A (en) Self-cleaning piston type filter and filtering system
KR20160135302A (en) Thread debris filtering apparatus
CN103503819B (en) The dirty separator of water and the dirty separating and filtering device of water
CN209662800U (en) A kind of environmental monitoring water sample rapid filtering device
CN210385041U (en) Novel prefilter
US2960232A (en) Swimming pool filter
CN105797457A (en) Basket filter
CN201978585U (en) Direct-flush-type pre-filter
CN106178653A (en) A kind of oil exploitation filtering sand apparatus
CN213875653U (en) Industrial wastewater acquisition and analysis device
CN209161620U (en) A kind of integral type too many levels pretreatment water tank
CN114413303A (en) Kitchen oil smoke discharging equipment
CN209679612U (en) A kind of novel basket type filter
CN208641917U (en) A kind of cotton-wool separator for bleaching and dyeing wastewater
CN209314831U (en) A kind of water-saving steaming plant
CN208626854U (en) A kind of negative pressure filtration tank
CN208911578U (en) A kind of filter device being not easy to plug
CN208212689U (en) A kind of oil pump screen that filter effect is good
CN110433559A (en) A kind of sanitary sewage disposal filter device
US2835389A (en) Diatomite filter unit
CN217939465U (en) Sewage filtering and sampling device
CN208807274U (en) A kind of drip irrigation appliance
CN208785876U (en) A kind of online backwashing filter
CN208943536U (en) A kind of diatomaceous earth filter

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191122