CN109999546A - A kind of turnover panel well strainer, filtration system and its application method - Google Patents
A kind of turnover panel well strainer, filtration system and its application method Download PDFInfo
- Publication number
- CN109999546A CN109999546A CN201910228408.7A CN201910228408A CN109999546A CN 109999546 A CN109999546 A CN 109999546A CN 201910228408 A CN201910228408 A CN 201910228408A CN 109999546 A CN109999546 A CN 109999546A
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- Prior art keywords
- turnover panel
- strainer
- water
- filter housing
- filter
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- 230000007306 turnover Effects 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001914 filtration Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 239000010865 sewage Substances 0.000 claims abstract description 34
- 239000012535 impurity Substances 0.000 claims abstract description 19
- 230000002262 irrigation Effects 0.000 claims description 16
- 238000003973 irrigation Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 abstract description 11
- 238000007599 discharging Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000003749 cleanliness Effects 0.000 description 15
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a kind of turnover panel well strainer, including filter housing, filter housing one end is water inlet, and the other end is sewage draining exit, and the filter housing bottom offers water outlet；The filter housing inner wall is provided with annulus cylindricality strainer, and the annulus cylindricality strainer center is provided with turnover panel, and turnover panel constitutes an entirety by shaft and filter housing, and the handle in the shaft is connected and is controlled by it with solenoid valve.Using turnover panel well strainer of the present invention, in 180m3The operating condition down blow time of/s can be reduced to 1min, greatly reduce as blowing time it is too long caused by water resource waste；The clean level of blowdown simultaneously is higher, and 98% accumulated impurities can be discharged outside filter；The present invention carries out classification sewage discharging function using turnover panel open and close control water flow using a kind of new method for discharging pollution, easy to operate, in practice using more convenient.
Description
Technical field
The invention belongs to filter technology fields, turnover panel well strainer, mistake more particularly to a kind of crop field trickle irrigation
Filter system and its application method.
Background technique
Micro irrigation technology is the modern irrigation technique that arid region in northwest China oasis fully and rationally used and saved water resource,
It is the effective way for overcoming soil secondary salinization harm, improving productivity effect, the irrigation system of efficient is the Northwest
The bracing force of agro based economic development.
Wherein slight irrigation is the important component of irrigation system with well strainer, using Corpping in North Xinjiang as representative, net
Formula filter has the function of the sand grain and suspended impurity that can be effectively removed in water source.When filter runs one section
After time, strainer inner surface can be blocked by sand grain and suspended impurity, and head loss increases, to reach wanting for high efficiency filter
It asks, need to carry out blowdown work to filter, therefore energy loss to filter and filth-discharging effect become and determine filter capability
The key factor of quality.
But self-cleaning net type filter self-cleaning effect is extremely difficult to higher standard, in actual operation often under the influence of
The normal work of one filter cycle.Meanwhile the precise relation for pointing out flow and blowing time being also not known in existing research, only
It is the working range of determining blowing time, is easy to produce deviation in actual operation.It would therefore be highly desirable to research and develop a kind of novel turnover panel net
Formula filter, by the research of blowing time and blowdown cleanliness, with solve that existing filter energy loss is big and blowdown not
Thorough problem.
Summary of the invention
The present invention is directed to overcome the defect of existing design, designs a kind of of simple structure and low cost and be able to carry out certainly
Turnover panel well strainer, filtration system and its application method of dynamic blowdown.
A kind of turnover panel well strainer, including filter housing 5,5 one end of filter housing are water inlet 4, and the other end is
Sewage draining exit 1,5 bottom of filter housing offer water outlet 6；5 inner wall of filter housing is provided with the filter of annulus cylindricality
Net, the annulus cylindricality strainer center are provided with turnover panel 3, and turnover panel 3 is whole by shaft 16 and the composition of filter housing 5 one
Body, the handle 17 in the shaft 16 are connected and are controlled by it with solenoid valve.
The internal diameter of the annulus cylindricality strainer is identical as the outer diameter of turnover panel 3.
Pressure gauge 2 is additionally provided on the filter housing 5, pressure gauge 2 is located near water outlet 6, for cooperating water inlet
Pressure change at pipe in the common monitoring of filtration process of pressure gauge.
The water inlet 4 is also threadedly coupled with butterfly valve.
It is bolted between the filter housing 5 and sewage draining exit 1 by gradient tube.
A kind of turnover panel net formula filtration system, including turnover panel well strainer, reservoir 7, sand setting stirring pool 8 and sewerage
The water inlet 4 in pond, the turnover panel well strainer is connected by water inlet pipe 11 with 7 bottom of reservoir, the turnover panel net formula mistake
The sewage draining exit 1 of filter is connected by pipeline with sand setting stirring pool 8, and the water outlet 6 of the turnover panel well strainer connects trickle irrigation
The water inlet pipe in crop field.
It is additionally provided with water pump 10 and flowmeter 12 on the water inlet pipe 11, then water pump 10 is connected with frequency conversion tank 9.
A kind of application method of turnover panel well strainer, includes the following steps:
1, impurity screening: keeping turnover panel to be in full open position, and sewage draining exit completely closes, and butterfly valve is opened, by strainer
Portion carries out contaminant filter with water to slight irrigation to outside, less than aperture of filter screen accumulation of impurities in interior, make pressure in strainer
Increase；Filtered clean water is entered in irrigation system by water outlet simultaneously；It is preset when strainer internal and external pressure difference reaches
Pressure difference when, start blowdown；
2, first time blowdown: outlet valve is closed, opens simultaneously sewage draining exit valve, turnover panel is in the open state, Xiang Jin
Mouth of a river injected clear water carries the impurity between water inlet and turnover panel to water outlet, and accumulation is formed between turnover panel and water outlet；
3, second of blowdown: after completing step 2, control turnover panel is closed, and water flows through in the strainer between turnover panel and water inlet
Side enters on the outside of strainer, then through entering on the inside of strainer on the outside of the strainer between water outlet and turnover panel, passes through returning for water outlet
The impurity being deposited between turnover panel and water outlet is carried to filtering through sewage draining exit by the clear water collective effect of flowing water and water inlet
Outside device；
4, turnover panel is fully opened again, the pressure difference that the pressure gauge at intake-outlet is shown is observed, if reaching filter
The pressure difference value of original operating state completes entire blowdown work.
Wherein, a blowdown process mainly utilizes the strainer inner surface of intake pressure completion turnover panel and water inlet part clear
It washes, pressure that secondary blowdown process is mainly formed using return water in water inlet injected clear water and water outlet pipe accomplishes turnover panel by joint efforts
Strainer inner surface cleans and will be inside impurity discharge filter between water outlet.
Due to the adoption of the above technical scheme, the present invention has following good effect:
1, the present invention is mainly that blowdown mode is complicated during solving current well strainer blowdown and filth-discharging effect is poor
The problem of, by experimental study, in 180m3The operating condition down blow time of/s can be reduced to 1min, greatly reduce due to
The waste of water resource caused by blowing time is too long；The clean level of blowdown simultaneously is higher, and 98% accumulated impurities can be arranged
Out outside filter；
2. the present invention using a kind of new method for discharging pollution, i.e., carries out classification sewage discharging function, operation using turnover panel open and close control water flow
Simply, in practice using more convenient.
Detailed description of the invention
Fig. 1 is the overall structure diagram of turnover panel well strainer of the present invention.
Fig. 2 is the partial enlarged view of turnover panel.
Fig. 3 is the thin portion schematic diagram of strainer.
Fig. 4 is the overall structure diagram of turnover panel net formula filtration system.
Sewage draining exit water sample silt content versus time curve when being 0.122g/l that Fig. 5 is silt content.
Sewage draining exit water sample silt content versus time curve when being 0.234g/l that Fig. 6 is silt content.
Sewage draining exit water sample silt content versus time curve when being 0.278g/l that Fig. 7 is silt content.
Sewage draining exit water sample silt content versus time curve when being 0.309g/l that Fig. 8 is silt content.
Sewage draining exit water sample silt content versus time curve when being 0.336g/l that Fig. 9 is silt content.
Wherein, 1 is sewage draining exit, and 2 be pressure gauge, and 3 be turnover panel, and 4 be water inlet, and 5 be filter housing, and 6 be water outlet, 7
It is sand setting stirring pool for reservoir, 8,9 be frequency conversion tank, and 10 be water pump, and 11 be water inlet pipe, and 12 be flowmeter, and 13 be stainless steel strip,
14 be outer cranse, and 15 be turnover panel main body, and 16 be shaft, and 17 be handle.
Specific embodiment
As shown in Figure 1-Figure 3, the invention discloses a kind of turnover panel well strainer, including filter housing 5, outside filter
5 one end of shell is water inlet 4, and the other end is sewage draining exit 1, and 5 bottom of filter housing offers water outlet 6；The filter
5 inner wall of shell is provided with annulus cylindricality strainer, and the annulus cylindricality strainer center is provided with turnover panel 3, and turnover panel 3 passes through shaft
16 constitute an entirety with filter housing 5, and the handle 17 in the shaft 16 is connected and is controlled by it with solenoid valve.
The internal diameter of the annulus cylindricality strainer is identical as the outer diameter of turnover panel 3.
Pressure gauge 2 is additionally provided on the filter housing 5, pressure gauge 2 is located near water outlet 6, for cooperating water inlet
Pressure change at pipe in the common monitoring of filtration process of pressure gauge.
It is bolted between the filter housing 5 and sewage draining exit 1 by gradient tube.
As shown in figure 4, a kind of turnover panel net formula filtration system, including turnover panel well strainer, reservoir 7, sand setting stirring pool 8
It is connected by water inlet pipe 11 with 7 bottom of reservoir with the water inlet 4 in blowdown pond, the turnover panel well strainer, in bolt
Butterfly switch is arranged in junction；The sewage draining exit 1 of the turnover panel well strainer is connected by pipeline with sand setting stirring pool 8,
It is bolted place's setting butterfly switch；The water outlet 6 of the turnover panel well strainer connects the water inlet pipe in trickle irrigation crop field, in bolt
Butterfly switch is arranged in junction.
It is additionally provided with water pump 10 and flowmeter 12 on the water inlet pipe 11, then water pump 10 is connected with frequency conversion tank 9.
A kind of application method of turnover panel well strainer, includes the following steps:
1, impurity screening: keeping turnover panel to be in full open position, and sewage draining exit completely closes, and butterfly valve is opened, by strainer
Portion carries out contaminant filter with water to slight irrigation to outside, less than aperture of filter screen accumulation of impurities in interior, make pressure in strainer
Increase；Filtered clean water is entered in irrigation system by water outlet simultaneously；It is preset when strainer internal and external pressure difference reaches
Pressure difference when, start blowdown；
2, first time blowdown: outlet valve is closed, opens simultaneously sewage draining exit valve, turnover panel is in the open state, Xiang Jin
Mouth of a river injected clear water carries the impurity between water inlet and turnover panel to water outlet, and accumulation is formed between turnover panel and water outlet；
3, second of blowdown: after completing step 2, control turnover panel is closed, and water flows through in the strainer between turnover panel and water inlet
Side enters on the outside of strainer, then through entering on the inside of strainer on the outside of the strainer between water outlet and turnover panel, passes through returning for water outlet
The impurity being deposited between turnover panel and water outlet is carried to filtering through sewage draining exit by the clear water collective effect of flowing water and water inlet
Outside device；
4, turnover panel is fully opened again, the pressure difference that the pressure gauge at intake-outlet is shown is observed, if reaching filter
The pressure difference value of original operating state completes entire blowdown work.
Wherein, a blowdown process mainly utilizes the strainer inner surface of intake pressure completion turnover panel and water inlet part clear
It washes, pressure that secondary blowdown process is mainly formed using return water in water inlet injected clear water and water outlet pipe accomplishes turnover panel by joint efforts
Strainer inner surface cleans and will be inside impurity discharge filter between water outlet.
The mating auxiliary equipment that the turnover panel net formula filtration system uses is referring to table 1.
The mating auxiliary equipment of table 1
As shown in figures 5-9, blowdown performance test is carried out to 80 mesh filter screen common in the slight irrigation of crop field, by sewage draining exit
5 different silt content down blow saliva sample silt content versus time curves are drawn in the measurement of arsenicbearing gold ores sample silt content.
1, blowing time is analyzed
By orthogonal test analysis, filter blowdown flow is the key factor for influencing filter blowing time.Work as import
One timing of silt content, sewage draining exit silt content are consistent with the changing rule of blowing time.In the initial 0-25s stage, filter
When carrying out a blowdown, sewage draining exit silt content is remained unchanged, substantially equal to the silt content of blowdown water, because in a blowdown,
Mainly the silt impurity between filter water inlet and turnover panel is migrated near sewage draining exit；Stage after 25s, filter into
When the secondary blowdown of row, sewage draining exit silt content starts to increase, reach decline after peak value until restore to blowdown water silt content one
When cause, remain unchanged.
It is found by Fig. 5-Fig. 9, with the increase of blowdown flow, when sewage draining exit silt content reaches time and the total blowdown of peak value
Between reducing.When flow of inlet water is 140m3/s-160m3When/s, the time for reaching blowdown peak value is 40-45s, blowdown total time
For 63-69s；When flow of inlet water is 170m3/s-200m3When/s, the time for reaching blowdown peak value is 30-40s, and blowdown total time is
48-53s.It is practical in conjunction with test data and engineering, it determines under low discharge operating condition, blowing time should be 70s；Determine high flow capacity operating condition
Under, blowing time should be 50s, when to avoid the excessive problem of the water consumption due to the too long generation of blowing time and due to blowdown
Between the substandard problem of cleaning effect caused by deficiency.
2, filth-discharging effect is analyzed
By orthogonal test analysis, filter flow of inlet water is another key factor for influencing filter blowdown cleanliness.
In the case where silt content of intaking is certain, the husky amount of blocking and sewage draining exit sand discharge total amount, high inside measurement different flow lower filter screen
Flow (170m3/h-200m3/ h) and low discharge (140m3/h-160m3/ h) summarize data under operating condition and is shown in Table 2 and table 3 respectively.
2 low discharge operating condition blowdown flow of table and blowdown cleanliness calculate summary sheet
3 high flow capacity operating condition blowdown flow of table and blowdown cleanliness calculate summary sheet
By table 2 and the analysis of table 3 it is found that when one timing of silt content, blowdown cleanliness and flow of inlet water are in a linear relationship, low
Cleanliness is lower under flow rate working conditions, and cleanliness is respectively less than 90%, and cleanliness is higher under high flow capacity operating condition, and cleanliness is big
In 90%, i.e., increase with flow of inlet water, blowdown cleanliness λ increases；When one timing of flow of inlet water, blowdown cleanliness and silt content are also
It is in a linear relationship, with Q=170m3/ h analysis, silt content are changed to 0.336g/l by 0.122g/l, blowdown cleanliness by
95.57% is changed to 72.30%, i.e., increases with water inlet silt content, blowdown cleanliness λ reduces；When flow is 180m3/ h and its with
When upper, cleanliness is basically stable at 97% or more, i.e., when flow is larger, cleanliness is mainly related with flow of inlet water, silt content
It is little to its influence degree.
Claims (7)
1. a kind of turnover panel well strainer, including filter housing (5), filter housing (5) one end is water inlet (4), another
End is sewage draining exit (1), and filter housing (5) bottom offers water outlet (6)；Filter housing (5) the inner wall setting
There is annulus cylindricality strainer, it is characterised in that: the annulus cylindricality strainer center is provided with turnover panel (3), and turnover panel (3) is by turning
Axis (16) and filter housing (5) constitute an entirety, the handle (17) on the shaft (16) be connected with solenoid valve and by
It is controlled.
2. turnover panel well strainer as described in claim 1, it is characterised in that: the internal diameter and turnover panel of the annulus cylindricality strainer
(3) outer diameter is identical.
3. turnover panel well strainer as described in claim 1, it is characterised in that: be additionally provided on the filter housing (5)
Pressure gauge (2), pressure gauge (2) are located near water outlet (6), for cooperating at water inlet pipe in the common monitoring of filtration process of pressure gauge
Pressure change.
4. turnover panel well strainer as described in claim 1, it is characterised in that: the filter housing (5) and sewage draining exit (1)
Between be bolted by gradient tube.
5. a kind of turnover panel net formula filtration system, it is characterised in that: including turnover panel net formula mistake according to any one of claims 1-4
The water inlet (4) in filter, reservoir (7), sand setting stirring pool (8) and blowdown pond, the turnover panel well strainer passes through water inlet
Pipe (11) is connected with reservoir (7) bottom, and the sewage draining exit (1) of the turnover panel well strainer passes through pipeline and sand setting stirring pool
(8) it is connected, the water inlet pipe in water outlet (6) the connection trickle irrigation crop field of the turnover panel well strainer.
6. turnover panel net formula filtration system as claimed in claim 5, it is characterised in that: be additionally provided with water on the water inlet pipe (11)
(10) and flowmeter (12) are pumped, then water pump (10) is connected with frequency conversion tank (9).
7. the application method of turnover panel well strainer according to any one of claims 1-4, it is characterised in that including walking as follows
It is rapid:
(1) impurity screening: keep turnover panel be in full open position, sewage draining exit completely closes, opening butterfly valve, from interior to
Outside carries out contaminant filter with water to slight irrigation, less than aperture of filter screen accumulation of impurities in interior, increase pressure；
Filtered clean water is entered in irrigation system by water outlet simultaneously；When strainer internal and external pressure difference reaches preset pressure
When poor, start blowdown；
(2) first time blowdown: outlet valve is closed, opens simultaneously sewage draining exit valve, turnover panel is in the open state, to water inlet
Injected clear water carries the impurity between water inlet and turnover panel to water outlet, and accumulation is formed between turnover panel and water outlet；
(3) second of blowdown: after completing step 2, control turnover panel is closed, water flow through on the inside of the strainer between turnover panel and water inlet into
Enter on the outside of strainer, then through entering on the inside of strainer on the outside of the strainer between water outlet and turnover panel, passes through the recirculation water of water outlet
With the clear water collective effect of water inlet, the impurity being deposited between turnover panel and water outlet is carried to filter through sewage draining exit
Outside；
(4) turnover panel is fully opened again, the pressure difference that the pressure gauge at intake-outlet is shown is observed, if it is initial to reach filter
The pressure difference value of working condition completes entire blowdown work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910228408.7A CN109999546A (en) | 2019-03-25 | 2019-03-25 | A kind of turnover panel well strainer, filtration system and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910228408.7A CN109999546A (en) | 2019-03-25 | 2019-03-25 | A kind of turnover panel well strainer, filtration system and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109999546A true CN109999546A (en) | 2019-07-12 |
Family
ID=67167970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910228408.7A Pending CN109999546A (en) | 2019-03-25 | 2019-03-25 | A kind of turnover panel well strainer, filtration system and its application method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109999546A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552960A (en) * | 2020-12-13 | 2021-03-26 | 杭州黄俊环保科技有限公司 | Natural gas and steam combined power generation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102416273A (en) * | 2011-11-16 | 2012-04-18 | 大连优力特换热设备制造有限公司 | Automatic backwashing dirt remover |
| CN202237508U (en) * | 2011-08-01 | 2012-05-30 | 王东明 | Differential-pressure energy-saving automatic blowdown device |
| CN203678071U (en) * | 2014-01-17 | 2014-07-02 | 甘肃润华重工科技集团有限公司 | Backwashing filter |
| CN206526579U (en) * | 2017-02-06 | 2017-09-29 | 山东易安换热设备有限公司 | A kind of Full automatic differential pressure back-flushing filter |
| CN207324262U (en) * | 2017-10-19 | 2018-05-08 | 金昌农友雨润节水器材有限公司 | A kind of novel double-layer water filter |
-
2019
- 2019-03-25 CN CN201910228408.7A patent/CN109999546A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202237508U (en) * | 2011-08-01 | 2012-05-30 | 王东明 | Differential-pressure energy-saving automatic blowdown device |
| CN102416273A (en) * | 2011-11-16 | 2012-04-18 | 大连优力特换热设备制造有限公司 | Automatic backwashing dirt remover |
| CN203678071U (en) * | 2014-01-17 | 2014-07-02 | 甘肃润华重工科技集团有限公司 | Backwashing filter |
| CN206526579U (en) * | 2017-02-06 | 2017-09-29 | 山东易安换热设备有限公司 | A kind of Full automatic differential pressure back-flushing filter |
| CN207324262U (en) * | 2017-10-19 | 2018-05-08 | 金昌农友雨润节水器材有限公司 | A kind of novel double-layer water filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552960A (en) * | 2020-12-13 | 2021-03-26 | 杭州黄俊环保科技有限公司 | Natural gas and steam combined power generation device |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190712 |
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| RJ01 | Rejection of invention patent application after publication |