CN203090567U - Automatic non-reverse high-pressure back flushing filtration device - Google Patents
Automatic non-reverse high-pressure back flushing filtration device Download PDFInfo
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- CN203090567U CN203090567U CN 201220629584 CN201220629584U CN203090567U CN 203090567 U CN203090567 U CN 203090567U CN 201220629584 CN201220629584 CN 201220629584 CN 201220629584 U CN201220629584 U CN 201220629584U CN 203090567 U CN203090567 U CN 203090567U
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Abstract
The utility model provides an automatic non-reverse high-pressure back flushing filtration device. The device comprises a filter cartridge which is provided with a water inlet and a water outlet, wherein a check valve is arranged in the water outlet, and a back flushing device is arranged in the filter cartridge. The high-pressure back flushing device can back flush a microfine screen, so that a filtration effect of the automatic non-reverse high-pressure back flushing filtration device is ensured; and the filtered clean seawater can be prevented from generating a 'water hammer effect' on the water outlet and a filter, and the clean seawater is prevented from destructively impacting the filter.
Description
Technical field
The utility model relates to a kind of high pressure back-flushing filtering device of ship ballast water treatment system, especially relate to the non-return automatically clean sea water that prevents of a kind of energy to the generation of high pressure back-flushing filtering device water hammer, water attack sound and damaging impact, utilize the high pressure clean sea water filter to be carried out the automatic non-return high pressure back-flushing filtering device of backwash simultaneously.
Background technology
Ocean vessel ballast water (claiming water ballast again) is the navigation safety when unloaded and the seawater that loads in order to ensure foreign-going ship, effect is the needs according to operation of ship, full ship ballast tank is injected or discharges, with reach the drinking water of adjusting foreign-going ship and hull vertical, horizontal steadily and the metacentric height of safety, reduce the ocean-going vessel body deformability, in order to avoid cause excessive bending moment and shearing force.Reduce the ocean ship hull vibration, improve empty cabin airworthiness.These foreign-going ships will be vacated tonnage during to bank, Ballast Water must be drained in the marine site of bank state.
Today that transportation at sea is very flourishing, a large amount of ocean vessel ballast waters circulates between each ocean artificially, becomes the main approach that the harmful organism between geographical sexual isolation water body is propagated.Nearly 12,000,000,000 tons of the Ballast Water that annual global foreign-going ship carries, average every cubic metre of Ballast Water has 1.1 hundred million of the animals and plants of swimming, the biology that every day, carried in Ballast Water in the whole world just has 4500 kinds, and being identified has 500 kinds of living species to propagate invasion by ocean vessel ballast water approximately.Studies show that, many kinds of bacteriums, plant and animals can survive in different forms in the Ballast Water, the species that contained in the Ballast Water that a marine site installs additional can arrive at foreign-going ship and be discharged in the local seawater consequence that some species can cause catastrophic failure to the economy and the environment of locality when freight in another harbour, marine site.
It is safety and the stability that guarantees boats and ships that foreign-going ship is carried out the initial purpose of ballast; in recent years; along with the raising of people to marine environmental protection consciousness; ocean vessel ballast water installed and discharges additional the relevant environment problem that is caused; the particularly harm that causes because of unwanted aquatic organism and pathogen transfer has caused the extensive concern of each aspect of world society.For this reason, International Maritime Organization (IMO) has given great attention to the marine environment problem that is caused by ballast water for ship, and " international shipping Ballast Water and deposit control and management contract " passed through in the international shipping Ballast Management conference that International Maritime Organization held in 2004.Pact regulation must the mounting shipping ballast water treatment plant from 2009 new shipbuilding oceangoing ships, and spot ship is implemented to review, must the mounting shipping ballast water treatment plant to all foreign-going ships in 2017.After pact comes into force, do not have the boats and ships of mounting shipping ballast water treatment plant just can not sail IMO member state harbour into, violate pact and will face sanction and punishment, the boundary manages and the control ballast water for ship provides first global unified cura legitima foundation for transporting by sea in the whole world.
In numerous ballast water treatment technology, its simple design of self-cleaning filter and safe and reliable to operation and advantage such as big yield filtration continuously are application equipment more widely in Ship's Ballast System at present.Self-cleaning filter is used for tackling seawater than big flood organism and deposit, and it adopts filtering accuracy can reach 50 microns high strength seawater corrosionresisting stainless steel sintering net, operation automatically, automatic cleaning, automatic pollution discharge.Self-cleaning filter is when operation; when pressure reduction reaches setting value; or reach the systemic presupposition scavenging period at interval the time; under non-stop-machine situation; self-cleaning filter cleans screen pack automatically; with aquatic object and the deposit of clean deposition on screen pack, and all aquatic organisms and the deposit of screen pack interception be expelled back into former dry point, do not cause the strange land of secondary water biological species to shift.Thereby guaranteed the normal filtration effect of Ship's Ballast System, reached the requirement of " international shipping Ballast Water and deposit control and management contract " defined.
Yet in numerous self-cleaning filters, mainly be because its " automatic backwash " function is not backwash truly, just one cover contaminants collector is arranged at the filter screen inwall, the impurity that relies on self hydraulic pressure will be suspended in the filter screen inwall sucks blow-off pipe, can't remove or remove not thorough and adhere to impurity firm or that be jammed in the filter screen passage with filter screen, make filter screen lose water permeable ability, influence the service life of filter screen.Some self-cleaning filter is furnished with cleaning brush, but its function also is only limited to and removes the impurity be adsorbed on the filter screen inwall, and is powerless for the impurity that is jammed in the filter screen passage, even can make these impurity see through filter screen, enters and produces the water side, and then influence effluent quality.
Cross the seawater of filtration through self-cleaning filter and make further UV ultraviolet disinfection, import ballast tank of ship at last.When ballast for cruising storehouse Ballast Water reaches certain demand, need close ballast pump immediately and stop to continue to supply water to ballast tank.Because ballast pipe inner wall smooth, water flows freely, and when valve was closed suddenly or opened once more, current were under action of inertia, reach maximum rapidly, because fluid has momentum and compressibility to a certain degree, so the rapid variation of flow will cause pressure overvoltage or low excessively impact in pipeline, and appearance " cavitation " phenomenon, the impact of pressure will make tube wall stressed and produce noise, just as hammer knocks pipe, be called " water hammer effect "." water hammer effect " has great destructiveness: pressure is too high, will cause breaking of pipe, otherwise pressure is crossed the low collapsing that can cause pipe again.For preventing the generation of " water hammer effect ", need heavy caliber check-valves and connecting pipe be set in water outlet place of ballast water for ship self-cleaning filter, simultaneously, also just increased the floor space and the space of apparatus for treating ship ballast water.
" international shipping Ballast Water and deposit control and management contract " regulation: must the mounting shipping ballast water treatment plant to all foreign-going ships in 2017.For various reasons, large quantities of existing foreign-going ships are not reserved the space of mounting shipping ballast water treatment plant, install particularly the smaller the better to the floor space and the space requirement of ballast water treatment plant.
Summary of the invention
The purpose of this utility model provides a kind of can prevent " water hammer effect " the automatic non-return high pressure back-flushing filtering device of ballast water for ship of backwashing function takes place and has.
In order to achieve the above object, the utility model provides a kind of automatic non-return high pressure back-flushing filtering device, comprises cartridge filter, and described cartridge filter has water inlet and delivery port, is provided with check-valves in the described delivery port, is provided with back purge system in the cartridge filter.
Preferably, be provided with fie screen in the described cartridge filter, described back purge system comprises the high pressure nozzle of being located at fie screen one side, and high pressure nozzle connects high-pressure water pipe, and high-pressure water pipe connects high-pressure pump, and high-pressure pump connects delivery port.
More preferably, described back purge system also comprises the negative pressure suction nozzle of being located at the fie screen opposite side, and the negative pressure suction nozzle connects the blowdown axle, and an end of blowdown axle is located in the negative pressure suction inlet chamber, and the blowdown axle connects the stroke motor, and negative pressure suction inlet chamber connects sewage draining exit.
More preferably, described water inlet is connected pressure difference transmitter with delivery port, the pressure difference transmitter connection control system, and control system connects high-pressure pump.
More preferably, be provided with intake chamber, straining chamber and water-supplying chamber in the described cartridge filter, be provided with coarse strainer between intake chamber and the straining chamber, described fie screen is located between straining chamber and the water-supplying chamber, and described blowdown is located in the straining chamber.
Preferably, the valve gap that described check-valves comprises valve seat and is located at the valve seat exit is fixed with baffle in the valve seat, and an end of spring is fixed in the middle part of baffle, and the other end connects valve gap.
The utility model is placed in the high pressure nozzle in the screen pack outside by a cover, provide the water under high pressure of crossing after filtration that screen pack is carried out the high pressure backwash by high-pressure hydraulic pump, removed filter screen adhesion impurity firm or that be jammed in the filter screen passage and can't remove or remove halfway shortcoming.By a heavy caliber check-valves that is set in the automatic non-return high pressure back-flushing filtering device delivery port, prevented the generation of " water hammer effect " effectively.Because the heavy caliber check-valves is arranged in the automatic non-return high pressure back-flushing filtering device delivery port, heavy caliber check-valves setting all tube connectors have been removed from, the floor space and the space that have reduced apparatus for treating ship ballast water with automatic non-return high pressure back-flushing filtering device.
Design of the present utility model is to guarantee under different working conditions, seawater enters automatic non-return high pressure backwash filter by water inlet, behind coarse strainer filtering larger particles impurity, enter aquatic object in the further trap water of fie screen and tiny deposit.Along with various aquatic organisms and deposit deposition in the fie screen inboard, screen pack is blocked, Inlet and outlet water pressure reduction increases gradually, when pressure reduction reaches default definite value, the pressure difference transmitter that is connected in intake-outlet just passes to control system with detected pressure difference signal, and control system starts suction of suction nozzle negative pressure and backwash high pressure pump automatically.Transmission device drives the blowdown axle that suction nozzle is housed and does rotation and horizontal back and forth movement in the filter screen inboard at this moment, simultaneously, toss about at filter screen, the high pressure back purge system washes screen pack, and be corresponding relation with the inboard suction nozzle of filter screen, do not interrupting normally producing under the prerequisite of water, crossed the seawater that filters by sub-fraction, screen pack is carried out high pressure washing, the high pressure washing seawater sees through filter screen, sucked the blowdown axle together with aquatic organism that peels off from filter screen and deposit rapidly by suction nozzle, discharge by sewage draining exit at last.Cross the clean sea water that filters and after the sterilization of UV ultraviolet sterilizer, import the ballast for cruising storehouse by delivery port and by unidirectional heavy caliber check-valves.When the ballast for cruising storehouse reached certain demand, when closing ballast pump, the heavy caliber check-valves cut out valve gap simultaneously immediately by the structure structure of itself, has prevented the generation of " water hammer effect ".
In view of above design, the automatic non-return high pressure back-flushing filtering device of ballast water for ship of the present utility model, seawater is by the coarse filtration of high strength seawater corrosionresisting stainless steel coarse strainer, filtering larger particles impurity, and then the thin filtration by high strength seawater corrosionresisting stainless steel fie screen, further hold back various tiny aquatic object and deposit in the seawater, simultaneously, do not interrupting normally producing under the prerequisite of water, by high pressure nozzle fie screen is carried out backwash, sucked the blowdown axle together with aquatic organism that peels off from fie screen and deposit rapidly by suction nozzle, be discharged into former dry point by sewage draining exit, promptly guarantee the filter effect of whole ballast system middle filtrator, reached the standard of " international shipping Ballast Water and deposit control and management contract " defined again.
Filtered clear water is pressed ballast for cruising demand input ballast for cruising storehouse at last by the delivery port input UV ultra violet sterilizer ultraviolet disinfection that is arranged on automatic non-return high pressure back-flushing filtering device bottom.When ballast for cruising storehouse Ballast Water reaches certain demand, when closing ballast pump, the check-valves while is the self-closing valve lid immediately, prevents that filtered clean sea water to delivery port and filter " water hammer effect " taking place, and avoided the damaging impact of clean sea water to filter.Because check-valves is arranged in the automatic non-return high pressure back-flushing filtering device delivery port, all tube connectors of check-valves setting and automatic non-return high pressure back-flushing filtering device have promptly been removed from, the floor space and the space of apparatus for treating ship ballast water have been reduced again, make large quantities of normal operations, do not reserve mounting shipping ballast water treatment plant foreign-going ship and can both in the time by " international shipping Ballast Water and deposit control and management contract " defined suitable ship ballast water treatment system be installed.
The beneficial effects of the utility model:
1, self-cleaning filter device is arranged, adopt the filtration of thick, thin twice high strength seawater corrosionresisting stainless steel screen pack, various tiny aquatic object and deposits in filtering larger particles impurity and the seawater, thus reach the standard of " control of ballast water for ship and deposit and management international convention " defined.
2, the high pressure back purge system is arranged, under the prerequisite of not interrupting normal aquifer yield, the seawater by sub-fraction has been filtered carries out backwash by the high pressure back purge system to fie screen, thereby has guaranteed the filter effect of automatic non-return high pressure back-flushing filtering device.
3, automatic backstop is arranged, when closing ballast pump, the check-valves while is the self-closing valve lid immediately, prevents that filtered clean sea water to delivery port and filter " water hammer effect " taking place, and avoided the damaging impact of clean sea water to filter.
4, be arranged in the delivery port of automatic non-return high pressure back-flushing filtering device owing to check-valves, all tube connectors of check-valves and automatic non-return high pressure back-flushing filtering device have been removed from, reduce the floor space and the space of apparatus for treating ship ballast water, reduced ballast water for ship Unit Installation workload simultaneously.
Description of drawings
Fig. 1 is automatic non-return high pressure back-flushing filtering device structural representation;
Description of reference numerals
1. stroke motor, 2. negative pressure suction inlet chamber, 3. coarse strainer, 4. high pressure nozzle, 5. negative pressure suction nozzle, 6. high-pressure water pipe, 7. cartridge filter, 8. high-pressure pump, 9. sewage draining exit, 10. water inlet, 11. fie screens, 12. delivery port, 13. valve seats, 14. springs, 15. baffle, 16. valve gaps, 17. intake chambers, 18. straining chamber, 19. water-supplying chamber, 20. blowdown axles.
The specific embodiment
For the utility model is become apparent, now with preferred embodiment, and conjunction with figs. is described in detail below.
Embodiment
As shown in Figure 1, automatic non-return high pressure back-flushing filtering device of the present utility model comprises cartridge filter 7, and described cartridge filter 7 has water inlet 10 and delivery port 12, is provided with check-valves in the described delivery port 12, is provided with back purge system in the cartridge filter 7.
Be provided with intake chamber 17, straining chamber 18 and water-supplying chamber 19 in the described cartridge filter 7, be provided with coarse strainer 3 between intake chamber 17 and the straining chamber 18, fie screen 11 is located between straining chamber 18 and the water-supplying chamber 19, and described blowdown axle 20 is located in the straining chamber 18.
Described back purge system comprises the high pressure nozzle 4 of being located at fie screen 11 1 sides, and high pressure nozzle 4 connects high-pressure water pipe 6, and high-pressure water pipe 6 connects high-pressure pump 8, and high-pressure pump 8 connects delivery port 12.Described back purge system also comprises the negative pressure suction nozzle 5 of being located at fie screen 11 opposite sides, and negative pressure suction nozzle 5 connects blowdown axle 20, and an end of blowdown axle 20 is located in the negative pressure suction inlet chamber 2, and blowdown axle 20 connects stroke motor 1, and negative pressure suction inlet chamber 2 connects sewage draining exit 9.Described water inlet 10 is connected pressure difference transmitter with delivery port 12, the pressure difference transmitter connection control system, and control system connects high-pressure pump 8.
The valve gap 16 that described check-valves comprises valve seat 13 and is located at valve seat 13 exits is fixed with baffle 15 in the valve seat 13, an end of spring 14 is fixed in the middle part of baffle 15, and the other end connects valve gap 16.
Described stroke motor 1 is arranged on a kind of transmission device of negative pressure suction inlet chamber 2 ports, be used to drive the blowdown axle 20 that negative pressure suction nozzle 5 is housed and do rotation and horizontal back and forth movement in the filter screen inboard, suction is filtered adheres to aquatic object and deposit on the fie screen 11.
A kind of negative pressure straw and blowdown apparatus that described negative pressure suction inlet chamber 2 is arranged on the cartridge filter 7, be used in the sea water filter process, by high pressure backwash seawater, draw blocked aquatic object and deposit on the screen pack, thereby guarantee filter normally, work effectively.
Described coarse strainer 3 is the screen packs that are used for elimination seawater larger particles impurity, is sintered into by the high strength seawater corrosionresisting stainless steel.
Described high pressure nozzle 4 is arranged on fie screen 11 outsides, and is connected with high-pressure water pipe 6, is used for the hydraulic spray to the fie screen 11 inject high pressure globules.
Described negative pressure suction nozzle 5 is arranged on the blowdown axle 20 in negative pressure suction inlet chamber 2, is used to draw aquatic object blocked on the screen pack and sedimental suction nozzle.
Described high-pressure water pipe 6 is to be connected between high pressure nozzle 4 and the high-pressure pump 8, is used for carrying to high pressure nozzle 4 water pipe of high pressure backwash seawater.
Described cartridge filter 7 is made up of the 316L stainless steel, is used to deposit the tubular type object that needs filtering sea.
Described high-pressure pump 8 is arranged on cartridge filter 7 outsides, is connected in high-pressure water pipe 6 and filter delivery port 12, is not interrupting normally producing under the prerequisite of water, and the seawater by sub-fraction has been filtered carries out the high pressure backwash to screen pack.
Described sewage draining exit 9 is mounted in 2 lower ends, negative pressure suction inlet chamber, is used to discharge the larger particles impurity and various aquatic object and the sedimental outlet that are filtered.
Described water inlet 10 is arranged on cartridge filter 7 lower ends, and seawater enters the main entrance of filter.
Described fie screen 11 is a kind of high strength seawater corrosionresisting stainless steel sintering nets that adopt 50 microns of precision, is used for holding back the screen pack of seawater fine impurities.
Described delivery port 12, be arranged on cartridge filter 7 lower ends, process filtration back seawater mouth thus is transfused to the sterilization of UV ultra violet sterilizer once more and the heavy caliber check-valves is housed, and seawater can only flow into the UV ultra violet sterilizer from this delivery port after the filtration, but the seawer outlet of the cartridge filter that can not flow backwards back.
Described valve seat 13 is arranged in the delivery port 12, is used to install the usefulness of the baffle 15 of check-valves and valve gap 16 etc.
Described spring 14 is that the high strength seawater corrosionresisting stainless steel is made, and is used for the valve gap 16 of quick closedown check-valves.
Described baffle 15 is arranged in the valve seat 13, is used to place the flow direction of spring 14 and guiding seawater.
Described valve gap 16 is arranged on the valve seat 13, and the valve of the quick closedown that is used for going ahead of the rest before clean sea water stream flows backwards avoids producing water hammer, water attack sound and damaging impact.
Undressed seawater is by in the automatic non-return high pressure back-flushing filtering device of water inlet 10 inputs of ballast pump through being arranged on automatic non-return high pressure back-flushing filtering device bottom, in the airtight cavity cartridge filter of forming by the 316L stainless steel 7 of tubular, undressed seawater filters the impurity of larger particles through coarse strainer 3 assemblies that sintered into by the high strength seawater corrosionresisting stainless steel, crossing the seawater that filters through coarse strainer 3 filters once more by the fie screen 11 that the high strength seawater corrosionresisting stainless steel by 50 microns of precision sinters into once more, filtering adheres to fine water organism and the deposit on the fie screen 11, and the clear water after the filtration is imported UV ultra violet sterilizers ultraviolet disinfection once more by the delivery port 12 that is arranged on automatic non-return high pressure back-flushing filtering device bottom at last.
In filter process, the fine water organism and the deposit that adhere on the fie screen 11 are piled up gradually, fie screen 11 is blocked, turnover seawater pressure reduction increases gradually, when seawater pressure reduction reaches default definite value, the pressure difference transmitter that is connected in water inlet 11, delivery port 12 just passes to control system with detected pressure difference signal, control system starts high-pressure pump 8 automatically, carries out backwash from automatic non-return high pressure back-flushing filtering device delivery port 12 and by high-pressure water pipe 6 by 4 pairs of fie screens of high pressure nozzle 11.Stroke motor 1 drives the blowdown axle 20 that negative pressure suction nozzle 5 is housed and does rotation and horizontal back and forth movement in fie screen 11 inboards at this moment, high pressure nozzle 4 is corresponding relation with negative pressure suction nozzle 5, under the prerequisite of not interrupting normal aquifer yield, high-pressure pump 8 has been crossed the clean sea water that filters by sub-fraction, fie screen 12 is carried out the high pressure backwash, the clean sea water of backwash sees through fie screen 11, by in the negative pressure suction nozzle 5 rapid negative suction suction inlet chambeies 2, be discharged into former dry point together with the fine water organism that peels off from fie screen 11 and deposit by the sewage draining exit 9 of device in 2 lower ends, negative pressure suction inlet chamber.
When ballast for cruising storehouse Ballast Water reaches certain demand, when closing ballast pump, be arranged under the forceful action of the heavy caliber check-valves stainless spring 14 in being arranged on baffle 15 in the delivery port 12 of automatic non-return high pressure back-flushing filtering device, the self-closing valve lid 16 immediately, because sealing device and valve gap 16 are combined closely in the valve seat 13, prevented that filtered clean sea water to delivery port 12 and automatic non-return high pressure back-flushing filtering device " water hammer effect " taking place, and avoided the damaging impact of clean sea water to automatic non-return high pressure back-flushing filtering device.
In whole filtration cleaning process, it is uninterrupted that automatic non-return high pressure back-flushing filtering device filters work normally, be cleaned the larger particles impurity that gets off and big or small aquatic object and deposit and be expelled back into former dry point automatically, thereby guaranteed the filter effect of self-cleaning filter in the whole ballast system, reached the standard of " international shipping Ballast Water and deposit control and management contract " defined.
Claims (6)
1. automatic non-return high pressure back-flushing filtering device, it is characterized in that, comprise cartridge filter (7), described cartridge filter (7) has water inlet (10) and delivery port (12), described delivery port is provided with check-valves in (12), and cartridge filter is provided with back purge system in (7).
2. automatic non-return high pressure back-flushing filtering device as claimed in claim 1, it is characterized in that, be provided with fie screen (11) in the described cartridge filter (7), described back purge system comprises the high pressure nozzle (4) of being located at fie screen (11) one sides, high pressure nozzle (4) connects high-pressure water pipe (6), high-pressure water pipe (6) connects high-pressure pump (8), and high-pressure pump (8) connects delivery port (12).
3. automatic non-return high pressure back-flushing filtering device as claimed in claim 2, it is characterized in that, described back purge system also comprises the negative pressure suction nozzle (5) of being located at fie screen (11) opposite side, negative pressure suction nozzle (5) connects blowdown axle (20), one end of blowdown axle (20) is located in the negative pressure suction inlet chamber (2), blowdown axle (20) connects stroke motor (1), and negative pressure suction inlet chamber (2) connects sewage draining exit (9).
4. automatic non-return high pressure back-flushing filtering device as claimed in claim 3 is characterized in that described water inlet (10) is connected pressure difference transmitter with delivery port (12), the pressure difference transmitter connection control system, and control system connects high-pressure pump (8).
5. automatic non-return high pressure back-flushing filtering device as claimed in claim 3, it is characterized in that, be provided with intake chamber (17), straining chamber (18) and water-supplying chamber (19) in the described cartridge filter (7), be provided with coarse strainer (3) between intake chamber (17) and the straining chamber (18), described fie screen (11) is located between straining chamber (18) and the water-supplying chamber (19), and described blowdown axle (20) is located in the straining chamber (18).
6. automatic non-return high pressure back-flushing filtering device as claimed in claim 1, it is characterized in that, the valve gap (16) that described check-valves comprises valve seat (13) and is located at valve seat (13) exit, be fixed with baffle (15) in the valve seat (13), one end of spring (14) is fixed in the middle part of baffle (15), and the other end connects valve gap (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220629584 CN203090567U (en) | 2012-11-23 | 2012-11-23 | Automatic non-reverse high-pressure back flushing filtration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220629584 CN203090567U (en) | 2012-11-23 | 2012-11-23 | Automatic non-reverse high-pressure back flushing filtration device |
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| Publication Number | Publication Date |
|---|---|
| CN203090567U true CN203090567U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220629584 Expired - Fee Related CN203090567U (en) | 2012-11-23 | 2012-11-23 | Automatic non-reverse high-pressure back flushing filtration device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203090567U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105396249A (en) * | 2015-12-14 | 2016-03-16 | 成都迅德科技有限公司 | Novel fireproof nozzle |
| CN109331511A (en) * | 2018-10-29 | 2019-02-15 | 大禹节水（天津）有限公司 | A kind of trickle irrigation secondary filter |
| CN109368889A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | A kind of integration ballast water treatment plant |
| CN113577873A (en) * | 2021-08-24 | 2021-11-02 | 泰能天然气有限公司 | Filtering device |
-
2012
- 2012-11-23 CN CN 201220629584 patent/CN203090567U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105396249A (en) * | 2015-12-14 | 2016-03-16 | 成都迅德科技有限公司 | Novel fireproof nozzle |
| CN109368889A (en) * | 2018-10-18 | 2019-02-22 | 九江精密测试技术研究所 | A kind of integration ballast water treatment plant |
| CN109331511A (en) * | 2018-10-29 | 2019-02-15 | 大禹节水（天津）有限公司 | A kind of trickle irrigation secondary filter |
| CN113577873A (en) * | 2021-08-24 | 2021-11-02 | 泰能天然气有限公司 | Filtering device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| 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: 20130731 Termination date: 20181123 |