CN205965194U - Flow directn conversion controlling part and leading filter of back flush - Google Patents

Flow directn conversion controlling part and leading filter of back flush Download PDF

Info

Publication number
CN205965194U
CN205965194U CN201620942066.7U CN201620942066U CN205965194U CN 205965194 U CN205965194 U CN 205965194U CN 201620942066 U CN201620942066 U CN 201620942066U CN 205965194 U CN205965194 U CN 205965194U
Authority
CN
China
Prior art keywords
connecting hole
filter
flow direction
filter element
backwash
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.)
Withdrawn - After Issue
Application number
CN201620942066.7U
Other languages
Chinese (zh)
Inventor
吴伟锋
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201620942066.7U priority Critical patent/CN205965194U/en
Application granted granted Critical
Publication of CN205965194U publication Critical patent/CN205965194U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Filtration Of Liquid (AREA)

Abstract

The utility model provides a flow directn conversion controlling part and leading filter of back flush. Flow directn conversion controlling part includes controlling part body and rotating member. The controlling part body is globularly, and the lateral wall of controlling part body has first connecting hole, second connecting hole, third connecting hole and forms in one side of first connecting hole and communicate first connecting hole and cross filtration cell spare at least one outside apopore, and first connecting hole and second connecting hole be through the inside separation of controlling part body, and first connecting hole and third connecting hole be through the inside separation of controlling part body, and second connecting hole and third connecting hole communicate through controlling part body inside. The rotating member sets up and is connected in the upper portion of controlling part body and with outside change over switch, drives the controlling part body and rotates. Through set up single the flow directn conversion controlling part that can change water flow direction in the leading filter of back flush for the leading filter of back flush reaches the forward and filters with to wash the water flow direction who flow past filtration cell spare under the state opposite under the filtration state, the effect of counterflush.

Description

Flow direction conversion control and backwash fore filter
Technical field
This utility model is related to the technical field of filtration device structure, and changes control and anti-particularly to a kind of flow direction Rinse fore filter.
Background technology
For a long time, the rust of generation, silt, asbestos fibre, blood worm, moss algae etc. in civil running water course of conveying Secondary pollution all cannot solve.With the continuous improvement of living standard, the mankind also have strict hygienic requirements to drinking water, Modern house water all can install a fore filter, it is to avoid water pollution once again, also extend faucet, hot water simultaneously Device, toilet, water purifying direct drink the service life of the drainage facilities such as device, booster pump.
Fore filter on current market mainly has stacked fore filter, along stamp fore filter, siphonic The several types such as fore filter.In use for some time, the impurity such as gravel, rust can accumulate adhesion to these fore filters On filter screen, cause blocking and the breed bacteria of filter screen, also can lower filter effect simultaneously to a certain extent and slow down water outlet Water velocity.And in prior art, the impurity of such filter is cleared up, typically all carried out by dismantling the filter screen of filter Cleaning, troublesome poeration, loaded down with trivial details, also inconvenient.
Utility model content
This utility model clears up inconvenient and difficult cleaning to overcome the impurity on filter element in existing fore filter Clean problem, provides a kind of flow direction conversion control and backwash fore filter.
To achieve these goals, this utility model provides a kind of flow direction being arranged in backwash fore filter Conversion control, including control body and revolving part.Control body is in spherical, the side wall of control body have the first connecting hole, the Two connecting holes, the 3rd connecting hole and be formed at the side of the first connecting hole and connect outside the first connecting hole and filter element At least one apopore, the first connecting hole and the second connecting hole intercept through control body interior, and the first connecting hole and the 3rd connects Hole intercepts through control body interior, and the second connecting hole and the 3rd connecting hole connect through control body interior.Revolving part is arranged at control The top of part body is simultaneously connected with external switch, drives control body to rotate.
When backwash fore filter is in filtration condition, the first connecting hole is connected with flowing water water inlet, and second even Connect hole and connect filter element, the 3rd connecting hole is connected with outlet;Flowing water through the first connecting hole and at least one apopore from The outside flow direction of filter element is internal, and the water after filtration flow to outlet through the second connecting hole and the 3rd connecting hole.
When backwash fore filter is in backwash state, revolving part drives control body to rotate and makes the second connection Hole is connected with flowing water import, and the 3rd connecting hole is connected with filter element, and flowing water was reverse flowed to from the inside of filter element The outside of filtering element, backward erosion filter element.
In this utility model one embodiment, the quantity of apopore is six, is symmetrically arranged at the first connecting hole Both sides up and down, the area sum of six apopores is equal to the area of the first connecting hole.
It is characterised in that the axis of the axis of each apopore and the first connecting hole in this utility model one embodiment Vertically.
In this utility model one embodiment, the first connecting hole and the 3rd connecting hole are coaxially disposed, the axle of the first connecting hole Line and the axis perpendicular of the second connecting hole.
In this utility model one embodiment, flow direction conversion control also includes positioning bolster, and positioning bolster sets It is placed in the bottom of control body.
In this utility model one embodiment, positioning bolster is flexible seal ring.
In this utility model one embodiment, revolving part is had the swivelling chute being matched with external switch.
On the other hand this utility model also provides a kind of backwash fore filter, including filter body, filter element, Any of the above-described flow direction conversion control, universal joint, permutator and blowoff valve.Filter body has flowing water water inlet And outlet.Filter element is arranged in filter body.Flow direction conversion control is arranged in filter body, is filtering Current are made to pass through filter element in a reverse direction when state and backwash state.Universal joint is arranged in filter body, even Take over filtering element and flow direction conversion control.Permutator is changed the revolving part in control with flow direction and is connected.Blowdown Valve is connected with filter element, and when backwash fore filter is in filtration condition, blowoff valve cuts out, when the preposition mistake of backwash When filter is in backwash state, blowoff valve is opened.
On the other hand this utility model also provides a kind of backwash fore filter, including filter body, filter element, Any of the above-described flow direction conversion control, permutator and blowoff valve.Filter body has flowing water water inlet and water outlet Mouthful.Filter element is arranged in filter body.Flow direction conversion control is arranged in filter body and and filter element It is connected, make in filtration condition and backwash state current pass through filter element in a reverse direction.Permutator and fluid The revolving part that direction is changed in control is connected.Blowoff valve is connected with filter element, when backwash fore filter was in During filter state, blowoff valve cuts out, and when backwash fore filter is in backwash state, blowoff valve is opened.
In sum, this utility model provides flow direction conversion control and backwash fore filter and prior art Compare with advantages below:
The single flow direction changed the direction of a stream of water conversion control is set in backwash fore filter so that recoiling Wash fore filter under filtration condition and flushing state under flow through filter element water (flow) direction contrary.This setting makes in punching Wash under state, the impurity being trapped on filter element outer surface when filtering is reversed and washes away by current, need not dismantle can be real The thorough cleaning of existing filter element.Square impact filters, recoil cleaning, and user indiscriminately ad. as one wishes can switch over according to practical situation, Swift to operate, convenient, safe and reliable, and home-use house lead in main valve can be replaced, save the installation of a family one valve.
In flow direction conversion control, the change of water (flow) direction is then the first connection by being arranged on control body Hole, the second connecting hole, the 3rd connecting hole and at least one apopore are realizing.In filtration condition, due to the first connecting hole It is cut-off and the second connecting hole and the 3rd connecting hole between, flowing water flow to the outer of filter element through the first connecting hole and apopore Portion, flows out through the second connecting hole and the 3rd connecting hole after filtration, the impurity in flowing water is trapped in the outer surface of filter element.Anti- Rush state, so that the second connecting hole is connected with flowing water water inlet, the 3rd connecting hole and filter element It is connected, flowing water flows into the inside of filter element, then the outside to filter element through the second connecting hole and the 3rd connecting hole, reversely Wash away the trapped substance remaining in filter element outer surface.
It is that above and other objects, features and advantages of the present utility model can be become apparent, preferable reality cited below particularly Apply example, and coordinate accompanying drawing, be described in detail below.
Brief description
Fig. 1 show the structural representation of the flow direction conversion control of this utility model offer.
Fig. 2 show the flow direction conversion structural representation under filtration condition for the control shown in Fig. 1.
Fig. 3 show the flow direction conversion structural representation under recoil state for the control shown in Fig. 1.
Fig. 4 show sectional view under filtration condition for the backwash fore filter in embodiment one.
Fig. 5 show the sectional view of backwash another angle of fore filter shown in Fig. 4.
Fig. 6 show sectional view under backwash state for the backwash fore filter in embodiment one.
Fig. 7 show the sectional view of another angle of backwash prefilter shown in Fig. 6.
Fig. 8 show sectional view under filtration condition for the backwash fore filter in embodiment two.
Fig. 9 show the sectional view of backwash another angle of fore filter shown in Fig. 8.
Figure 10 show sectional view under backwash state for the backwash fore filter in embodiment two.
Figure 11 show the sectional view of another angle of backwash prefilter shown in Figure 10.
Specific embodiment
Embodiment one
As shown in Figure 1 to Figure 3, the flow direction conversion control 300 that the present embodiment provides includes control body 1 and revolving part 2.Control body 1 is in spherical, the side wall of control body 1 have the first connecting hole 11, the second connecting hole 12, the 3rd connecting hole 13 with And be formed at the side of the first connecting hole 11 and connect at least one apopore outside the first connecting hole 11 and filter element 200 14, the first connecting hole 11 and the second connecting hole 12 are through control body 1 inner barrier, the first connecting hole 11 and the 3rd connecting hole 13 warp Control body 1 inner barrier, the second connecting hole 12 and the 3rd connecting hole 13 connect through control body 1 is internal.Revolving part 2 is arranged at The top of control body 1 is simultaneously connected with external switch 400, drives control body 1 to rotate.
Corresponding, as shown in Figures 4 to 7, the present embodiment also provides a kind of recoil with flow direction conversion control 300 Wash fore filter.This backwash fore filter includes filter body 100, filter element 200, flow direction conversion control 300th, universal joint 600, permutator 400 and blowoff valve 500.Filter body 100 has flowing water water inlet 101 and outlet 102.Filter element 200 is arranged in filter body 100.Flow direction conversion control 300 is arranged at filter body 100 Interior, make current pass through filter element 200 in a reverse direction in filtration condition and backwash state.Universal joint 600 is arranged at In filter body 100, connect filter element 200 and flow direction conversion control 300.Permutator 400 and flow direction turn The revolving part 2 changing in control 300 is connected.Blowoff valve 500 is connected with filter element 200, at backwash fore filter When filtration condition, blowoff valve 500 cuts out;When backwash fore filter is in backwash state, blowoff valve 500 is opened.
Change control below with reference to Fig. 1 to Fig. 7 convection cell direction and the operation principle of backwash fore filter is made in detail Describe in detail bright.
As shown in Figure 4 and Figure 5, when backwash fore filter is in filtration condition, the first connecting hole 11 is entered with flowing water The mouth of a river 101 is connected, and the second connecting hole 12 connects filter element 200, and the 3rd connecting hole 13 is connected with outlet 102.Flowing water Internal from the outside flow direction of filter element 200 through the first connecting hole 11 and at least one apopore 14.Impurity in water is trapped In the outer surface of filter element 200, the water after filtration flow to outlet 102 through the second connecting hole 12 and the 3rd connecting hole 13.When After backwash fore filter is using a period of time, the impurity of filter element 200 surface retention gets more and more, or even blocking is filtered The mesh of element reduces so that filtering water outlet.In that case, user can be by rotating permutator 400, permutator 400 drive control body 1 to rotate so that control body 1 is in backwash state as shown in Figure 3 by revolving part 2.
In the present embodiment, the first connecting hole 11 and the 3rd connecting hole 13 are coaxially disposed, the axis of the first connecting hole 11 with The axis perpendicular of the second connecting hole 12.This setting makes permutator 400 rotate 90 degree and flow direction can be changed control 300 switch to backwash state from filtration condition, or switch to filtration condition from backwash state.However, this utility model pair This is not limited in any way.Axis, second connecting hole of the first connecting hole 11, in other embodiments, can be set according to practical situation Angle between the axis three of 12 axis and the 3rd connecting hole 13.Part 2 is rotated for more convenient permutator 400, in In the present embodiment, revolving part 2 is had the swivelling chute 21 being matched with external switch 400.
As shown in Figure 6 and Figure 7, when backwash fore filter is in backwash state, the second connecting hole 12 and flowing water Import 101 is connected, and the 3rd connecting hole 13 is connected with filter element 200, and flowing water is through the second connecting hole 12 and the 3rd connecting hole 13 are reverse flowed to the outside of filter element 200 from the inside of filter element 200, and backward erosion remains in the outer of filter element 200 Trapped substance on surface, the sewage of backwash flows out from blowoff valve 500.
The backwash fore filter that the present embodiment provides, only need to arrange single flow direction conversion in filter body Control can make current pass through filter element in a reverse direction, realizes the reverse cleaning down of filter element, and need not be by mistake Cleared up after filtering element dismounting, very easy to use and simple to operate.
Further, in the flow direction conversion control that this utility model provides, control body is spherical in shape (on control body After setting revolving part and buffering keeper, flow direction conversion control is similar to UFO-like), this setting makes the second connecting hole 12 He 3rd connecting hole 13 is connected by the inside of spheroid, realizes full-bore and is connected, flow is greatly improved.Additionally, being filtered The size limitation of device body 100 and the requirement of reduces cost, in the present embodiment, the quantity of apopore 14 is six, respectively It is symmetricly set on the both sides up and down of the first connecting hole 11, the area sum of six apopores 14 is equal to the face of the first connecting hole 11 Long-pending.The external diameter of control body 1 is reduced by this setting as far as possible, considerably reduces the volume of control body 1.However, this practicality The new quantity to apopore 14 is not limited in any way.In other embodiments, the quantity of apopore 14 can be in addition to six Other numbers.And when the quantity of apopore 14 is one and when will keep having same traffic with six apopores 14, control body 1 External diameter need at least increase by 1.5 times, not only considerably increase cost, the volume of filter body 100 also will increase simultaneously.Enter one Step, for reducing the resistance of current, the axis arranging each apopore 14 is vertical with the axis of the first connecting hole 11.
Made using metal because control body 1 is usual and it is spherical, for making its energy in state conversion process accurate Positioning and minimizing abrasion, setting flow direction conversion control 300 also includes being arranged on the positioning bolster 3 of control body 1 bottom. In the present embodiment, positioning bolster 3 is flexible seals, specially plastic seal ring.However, this utility model is not made to this Any restriction.
The backwash fore filter that the present embodiment provides arranges universal joint 600, i.e. universal type in filter body 100 Backwash fore filter.Universal joint 600 realize comprehensive turn design, can install in the position of different angles, improve biography Unite through-type fore filter installation limitation, substantially increase the serviceability of backwash fore filter, family can be replaced Use house lead in main valve, save the installation of a family one valve.
Embodiment two
The present embodiment is essentially identical with embodiment one and its change, and difference is:The backwash that the present embodiment provides is preposition Filter is through type backwash fore filter (being not provided with universal joint in filter body).The back flush type of the present embodiment Fore filter include filter body 100 ', filter element 200 ', flow direction conversion control 300 ', permutator 400 ' with And blowoff valve 500 '.Filter body 100 ' has flowing water water inlet 101 ' and outlet 102 '.Filter element 200 ' is arranged at In filter body 100 '.Flow direction conversion control 300 ' be arranged in filter body 100 ' and with filter element 200 ' phase Connect, make in filtration condition and backwash state current pass through filter element 200 ' in a reverse direction.Permutator 400 ' Change the swivelling chute 21 ' in control 300 ' with flow direction to be connected.Blowoff valve 500 ' is connected with filter element 200 ', works as recoil When washing fore filter and being in filtration condition, blowoff valve 500 ' cuts out, when backwash fore filter is in backwash state, Blowoff valve 500 ' is opened.
As shown in Figs. 8 to 11, backwash fore filter and the backwash of embodiment one offer that the present embodiment provides The principle of formula fore filter is identical, and here is not repeated explanation, and both differ only in fluid in the present embodiment It is directly connected between direction conversion control 300 ' and filter element 200 '.
In sum, the single flow direction changed the direction of a stream of water conversion control is set in backwash fore filter Part so that backwash fore filter under filtration condition and flushing state under flow through filter element water (flow) direction contrary.Should Setting makes under flushing state, and the impurity being trapped on filter element outer surface when filtering is reversed and washes away, no by current The thorough cleaning that can achieve filter element need to be dismantled.Square impact filters, recoil cleaning, and user can follow one's bent according to practical situation Switch over, swift to operate, convenient, safe and reliable, and home-use house lead in main valve can be replaced, save the peace of a family one valve Dress.
In flow direction conversion control, the change of water (flow) direction is then the first connection by being arranged on control body Hole, the second connecting hole, the 3rd connecting hole and at least one apopore are realizing.In filtration condition, due to the first connecting hole It is cut-off and the second connecting hole and the 3rd connecting hole between, flowing water flow to the outer of filter element through the first connecting hole and apopore Portion, flows out through the second connecting hole and the 3rd connecting hole after filtration, the impurity in flowing water is trapped in the outer surface of filter element.Anti- Rush state, so that the second connecting hole is connected with flowing water water inlet, the 3rd connecting hole and filter element It is connected, flowing water flows into the inside of filter element, then the outside to filter element through the second connecting hole and the 3rd connecting hole, reversely Wash away the trapped substance remaining in filter element outer surface.
Although this utility model is disclosed above by preferred embodiment, but it is not limited to this utility model, any Know this those skilled in the art, without departing from spirit and scope of the present utility model, a little change and retouching, therefore this practicality can be made New protection domain ought be defined depending on claims scope required for protection.

Claims (9)

1. a kind of flow direction changes control it is characterised in that being arranged in backwash fore filter, including:
Control body, in spherical, the side wall of control body has the first connecting hole, the second connecting hole, the 3rd connecting hole and shape Become in the side of the first connecting hole and connect at least one apopore outside the first connecting hole and filter element, the first connecting hole Intercept through control body interior with the second connecting hole, the first connecting hole and the 3rd connecting hole intercept through control body interior, second Connecting hole and the 3rd connecting hole connect through control body interior;
Revolving part, is arranged at the top of described control body and is connected with external switch, drives control body to rotate;
When backwash fore filter is in filtration condition, the first connecting hole is connected with flowing water water inlet, the second connecting hole Connect filter element, the 3rd connecting hole is connected with outlet;Flowing water is through the first connecting hole and at least one apopore from filtration The outside flow direction of element is internal, and the water after filtration flow to outlet through the second connecting hole and the 3rd connecting hole;
When fore filter is in backwash state, revolving part drives the rotation of control body that the second connecting hole and flowing water are entered Mouth is connected, and the 3rd connecting hole is connected with filter element, and flowing water is reverse flowed to filter element from the inside of filter element Portion, backward erosion filter element.
2. flow direction according to claim 1 changes control it is characterised in that the quantity of described apopore is six, It is symmetrically arranged at the both sides up and down of the first connecting hole, the area sum of six apopores is equal to the area of the first connecting hole.
3. flow direction according to claim 1 and 2 conversion control is it is characterised in that the axis of each apopore and the The axis of one connecting hole is vertical.
4. flow direction conversion control according to claim 1 is it is characterised in that the first connecting hole and the 3rd connecting hole are same Axle is arranged, the axis perpendicular of the axis of the first connecting hole and the second connecting hole.
5. flow direction conversion control according to claim 1 is it is characterised in that described flow direction conversion control also wraps Include positioning bolster, described positioning bolster is arranged at the bottom of described control body.
6. flow direction according to claim 5 changes control it is characterised in that described positioning bolster is flexible sealing Circle.
7. flow direction conversion control according to claim 1 is turned it is characterised in that having on described revolving part with outside Change the swivelling chute that switch matches.
8. a kind of backwash fore filter is it is characterised in that include:
Filter body, has flowing water water inlet and outlet;
Filter element, is arranged in described filter body;
Flow direction conversion control described in any one of claim 1 to 7, is arranged in described filter body, is filtering shape Current are made to pass through filter element in a reverse direction when state and backwash state;
Universal joint, is arranged in described filter body, connects filter element and flow direction conversion control;
Permutator, changes the revolving part in control with described flow direction and is connected;
Blowoff valve, is connected with described filter element, and when backwash fore filter is in filtration condition, blowoff valve cuts out, When backwash fore filter is in backwash state, blowoff valve is opened.
9. a kind of backwash fore filter is it is characterised in that include:
Filter body, has flowing water water inlet and outlet;
Filter element, is arranged in described filter body;
Flow direction conversion control described in any one of claim 1 to 7, be arranged in described filter body and with described mistake Filtering element is connected, and makes current pass through filter element in a reverse direction in filtration condition and backwash state;
Permutator, changes the revolving part in control with described flow direction and is connected;
Blowoff valve, is connected with described filter element, and when backwash fore filter is in filtration condition, blowoff valve cuts out, When backwash fore filter is in backwash state, blowoff valve is opened.
CN201620942066.7U 2016-08-24 2016-08-24 Flow directn conversion controlling part and leading filter of back flush Withdrawn - After Issue CN205965194U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620942066.7U CN205965194U (en) 2016-08-24 2016-08-24 Flow directn conversion controlling part and leading filter of back flush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620942066.7U CN205965194U (en) 2016-08-24 2016-08-24 Flow directn conversion controlling part and leading filter of back flush

Publications (1)

Publication Number Publication Date
CN205965194U true CN205965194U (en) 2017-02-22

Family

ID=58034915

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620942066.7U Withdrawn - After Issue CN205965194U (en) 2016-08-24 2016-08-24 Flow directn conversion controlling part and leading filter of back flush

Country Status (1)

Country Link
CN (1) CN205965194U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106110728A (en) * 2016-08-24 2016-11-16 吴伟锋 Flow direction conversion control and backwash fore filter
CN107986530A (en) * 2017-12-14 2018-05-04 厦门市浩铂科技股份有限公司 A kind of composite Nano ore deposit crystalline substance energy filter core and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106110728A (en) * 2016-08-24 2016-11-16 吴伟锋 Flow direction conversion control and backwash fore filter
CN107986530A (en) * 2017-12-14 2018-05-04 厦门市浩铂科技股份有限公司 A kind of composite Nano ore deposit crystalline substance energy filter core and preparation method thereof
CN107986530B (en) * 2017-12-14 2020-04-24 张浩彬 Composite nano-mineral crystal energy filter element and preparation method thereof

Similar Documents

Publication Publication Date Title
CN204563744U (en) Fore filter
CN209891338U (en) Backwashing sewage lifting equipment
CN201168492Y (en) Water purifier capable of being flashed forwards and backwards
CN207230719U (en) The very bi-directional filtered geothermal utilization heating system of recharge
CN205965194U (en) Flow directn conversion controlling part and leading filter of back flush
CN105135001B (en) Waterway conversion valve and the water purifier with waterway conversion valve
CN110258730A (en) One kind can anticlogging hot-water heating kitchen and bath drainage pipeline
CN108635928A (en) A kind of self-cleaning filter
CN206934895U (en) Purifier and water heater
CN206046339U (en) A kind of kitchen faucet
CN106110728B (en) Flow direction changes control and backwash fore filter
CN109914538A (en) A kind of building drainage canal block-preventing device being convenient to clean
CN205504082U (en) Multi -functional clean water tap device of hydroelectric power generation
CN107754420A (en) A kind of new fore filter
CN104587734B (en) A kind of faucet water purifier
CN216813310U (en) Back flush water supply connector and water heater
CN206262195U (en) A kind of reverse direction rinses fore filter
CN206268578U (en) Filtering type angle valve
CN205442802U (en) Leading filter of self -cleaning adjustable before purifier
CN107715759A (en) A kind of sewage disposal device for being easy to sediment to clear up
CN208032088U (en) A kind of household water purifying reutilization system
CN209271005U (en) A kind of filtering cloth filtering pool of strong impact resistance
CN213655779U (en) Gate valve with purification function
CN106422461A (en) Reverse washing prefilter
CN206143847U (en) Sewage selectivity recovery system and clarification plant

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20170222

Effective date of abandoning: 20180116

AV01 Patent right actively abandoned