CN204723808U - A kind of water absorber - Google Patents
A kind of water absorber Download PDFInfo
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- CN204723808U CN204723808U CN201520322431.XU CN201520322431U CN204723808U CN 204723808 U CN204723808 U CN 204723808U CN 201520322431 U CN201520322431 U CN 201520322431U CN 204723808 U CN204723808 U CN 204723808U
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Abstract
A kind of water absorber, comprise suction head, suction hose and water pump, the water side of suction hose connects the water inlet of water pump, it is characterized in that: described suction head comprises housing and chassis of catchmenting, the catchment edge on chassis is connected with the edge of housing lower ending opening, and housing upper end is located at by suction hose joint; Housing is provided with multiple suction hole, and chassis of catchmenting has can the cavity of receiving fluids, and suction hole is communicated with the cavity on chassis of catchmenting; The water inlet end of suction hose extend into and catchments in the cavity on chassis.Water absorber of the present utility model is used for the absorption of sedimentation water elution salt phase supernatant liquid in photosensitive material emulsion production process, can either up hill and dale by supernatant liquid sucking-off, sucking-off can be avoided again to be deposited in the emulsion of lower floor, thus reduce the loss of expensive emulsion, reduce washing times, shorten the operating time, enhance productivity, and make emulsion quality more stable.Water absorber of the present utility model is used for other application scenario needing supernatant liquid to be separated with lower sediment thing.
Description
Technical field
The utility model relates to a kind of water absorber, and it can be used for the absorption of sedimentation water elution salt phase supernatant liquid in photosensitive material emulsion production process.
Background technology
Photosensitive material is divided into black and white photosensitive material and color sensitive material.The emulsion preparation of color sensitive material comprises the preparation of former breast and the preparation of oil breast, and the preparation of former breast refers to the preparation of emulsion, and the preparation of oil breast refers to the preparation of colour coupler.The key step of emulsion production method is dosing, emulsification, physical ripening, desalination and chemical ripening.Desalination is an important step in emulsion production process.Emulsion is after Over emulsfication and physical ripening, containing a large amount of potassium nitrate and excessive halide salt in emulsion, the existence of these salt will have a strong impact on the quality of chemical ripening and final photographic film, therefore these salt must be removed, and the salt content of every a collection of emulsion must be consistent.
Traditional desalinating process adopts slitting WATER-WASHING METHOD to carry out desalination, that is: the emulsion after emulsification and physical ripening is put into freezing 2 hours of refrigerator tray of 0-5 DEG C, emulsion is frozen into jelly thin layer that thickness is 7-10cm, then the emulsion of jelly is carried out slitting and washing.This slitting WATER-WASHING METHOD requires that the emulsion manufactured must, containing higher gelatin amount, if gel content is not enough, often need to add a certain amount of gelatin again after emulsification and physical ripening, could be in flakes freezing preferably.Adopt this slitting WATER-WASHING METHOD to carry out desalination, its shortcoming is unstable to the control of salt content, and water consumption is large, complex operation, and labour intensity is large, and washing time is long, and the emulsion gelatine content obtained is high, is not suitable for the requirement of modern high speed thin-layer coating.
In view of traditional desalinating process exists above-mentioned various shortcoming, people improve desalinating process.Desalinating process after improvement adopts sedimentation WATER-WASHING METHOD to carry out desalination, be specially: first the emulsion after emulsification and physical ripening lowered the temperature and regulate its pH value, precipitating reagent is added again inside emulsion, emulsion and gelatin coprecipitation are got off, and in emulsion, water miscible salt is then stayed in supernatant liquid; Again by the liquor abstraction of upper strata salt concentration; And then add water remaining emulsion washed, extract supernatant liquid (washing, precipitation, the process of extracting supernatant liquid out can carry out one or many according to actual conditions) after precipitation out, the salt content in emulsion is reduced in the scope of regulation.Sedimentation WATER-WASHING METHOD, compared with slitting WATER-WASHING METHOD, has that salt content easily controls, equipment is simple, operate the advantages such as simple and easy, with short production cycle, labour intensity is low.
In sedimentation WATER-WASHING METHOD, extracting supernatant liquid (namely absorbing water) is an important step.When absorbing water, sucking-off should be avoided to be deposited in emulsion and the gelatin of lower floor, should to try one's best fast simultaneously, (the too slow then gelatin of water suction can expand, and causes water washing effect poor by supernatant liquid sucking-off up hill and dale; Water suction is not thorough, can affect water washing effect, increases washing times), the loss of expensive emulsion (silver emulsion) can be reduced like this, reduce washing times, shorten the operating time, enhance productivity, and make emulsion quality more stable.
At present, the water absorber of supernatant liquid is drawn for sedimentation water elution salt phase, generally include suction head, suction hose and water pump (self priming pump can be adopted), suction head upper end is provided with suction hose joint, bottom is provided with multiple suction hole, suction head connects the water inlet end of suction hose by suction hose joint, and the water side of suction hose connects the water inlet of water pump.During water suction, suction head is put into supernatant liquid, after starting water pump, can supernatant liquid be extracted; Along with supernatant liquid is sucked out gradually, suction head declines gradually, until arrive solid-liquid interface.But, because suction hole is located at bottom suction head, during suction head water suction, liquid flows in suction head cavity from bottom to top, therefore, after most of supernatant liquid is sucked out, when suction head is close to solid-liquid interface, the emulsion of lower floor is easily sucked out with current, like this, to thoroughly extract supernatant liquid, then be easy to simultaneously by the emulsion sucking-off of lower floor, and to avoid the emulsion of lower floor to be sucked out, then suction head needs have with a certain distance from solid-liquid interface, be difficult to supernatant liquid sucking-off thoroughly, thus cannot take into account and avoid sucking-off to be deposited in the emulsion of lower floor and the requirement of gelatin these two aspects supernatant liquid sucking-off up hill and dale simultaneously.In addition, current emulsion is produced and is all carried out under safety lamp, the safety lamp that sedimentation water elution salt phase uses is the red light of Weak-luminescence, human eye is more difficult under such circumstances tells solid-liquid interface (particularly when solid-liquid interface is not fairly obvious), the position that more difficult grasp suction head finally will arrive.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of water absorber, this water absorber is used for the absorption of sedimentation water elution salt phase supernatant liquid in photosensitive material emulsion production process, can either, up hill and dale by supernatant liquid sucking-off, sucking-off can be avoided again to be deposited in the emulsion of lower floor.The technical scheme adopted is as follows:
A kind of water absorber, comprise suction head, suction hose and water pump, suction head upper end is provided with suction hose joint, suction head connects suction hose by suction hose joint, the water side of suction hose connects the water inlet of water pump, it is characterized in that: described suction head comprises housing and chassis of catchmenting, and the edge on chassis of catchmenting is connected with the edge of housing lower ending opening, and housing upper end is located at by suction hose joint; Housing is provided with multiple suction hole, and chassis of catchmenting has can the cavity of receiving fluids, and suction hole is communicated with the cavity on chassis of catchmenting; The water inlet end of suction hose extend into and catchments in the cavity on chassis, and suction hose joint is connected with the outer wall of suction hose.
During this water absorber water suction, suction head is put into supernatant liquid, liquid flows in the cavity (i.e. housing and the cavity that chassis surrounds jointly that catchments) of suction head from the suction hole housing, and be pooled under gravity and catchment in chassis, after the opening of the liquid-immersed suction hose water inlet end in chassis of catchmenting, namely water pump extracts these liquid by suction hose.When absorbing water to waterline lower than time to a certain degree, housing parts submergence in a liquid and part exposes in atmosphere (namely still have part suction hole liquid-immersed), now the water inlet end of suction hose also can be collected in the solution catchmented in chassis and closed, and maintenance absorbs water.And, because liquid enters suction head from suction head side, therefore when suction head is close to solid interface, current can be reduced on the sedimentary impact in below, avoid sediment to be sucked out.
In preferred version, the above-mentioned chassis lower surface that catchments raises to its peripheral part gradually from center chassis position of catchmenting, the position that in the corresponding chassis cavity that catchments of water inlet end of suction hose, the degree of depth is maximum.Like this, the centre of the chassis lower surface that catchments is protruded downwards, when suction head absorbs water to after chassis of catchmenting touches solid interface, suitably toward pressing down, as long as there is part suction hole liquid-immersed, still can also can continues water suction, can extract supernatant liquid as far as possible; And the liquid catchmented in chassis collects in suction hose water inlet end position, is convenient to sucking-off.
The outer margin contour on above-mentioned chassis of catchmenting can be circle, ellipse or other shape.Above-mentioned housing is usually up-small and down-big, and the outer margin contour on the shape of housing lower ending opening and size and chassis of catchmenting matches.In a kind of concrete scheme, the outer margin contour on chassis of catchmenting is for circular, and housing is up-small and down-big truncated cone-shaped.
Above-mentioned suction hole typically have a diameter from 0.5-5 millimeter.
In preferred version, above-mentioned housing is detachably provided with screen pack, the lateral surface of screen pack covering shell or medial surface.This screen pack can adopt stainless screen pack or bag type filtering net.Screen pack can be fixed on suction head with opening soon snap ring, can unpick and wash if desired.
Usually removably connect between the edge on above-mentioned chassis of catchmenting and the edge of housing lower ending opening, as clamping or be threaded, so that point demolition clean of suction head.
Above-mentioned water pump can adopt self priming pump.
In preferred version, the position near suction hose water inlet end in above-mentioned suction head is provided with one for controlling the liquid-level switch (as float type level switch) of starting mode of pump or closedown.When the water inlet end of suction hose is by hydraulic seal, liquid-level switch closes (ball float of such as float type level switch up floats, and float type level switch is closed), starts water pump and absorbs water; When the water inlet end place of suction hose has not had liquid to inhale, liquid-level switch has disconnected (ball float of such as float type level switch falls down under gravity, and float type level switch is disconnected), automatic closing water pump.In a kind of concrete scheme, above-mentioned water absorber comprises control circuit, described liquid-level switch, the input connection that liquid-level switch is corresponding to control circuit, and the output that the controller of water pump is corresponding to control circuit connects.In another kind of concrete scheme, also by wire, described liquid-level switch can be connected with the controller of water pump, directly be controlled startup or the closedown of water pump by liquid-level switch.
In preferred version, above-mentioned suction hose is provided with a check valve, and check valve to be in above suction head and near suction head; Described check valve allows liquid self-absorbing water pipe water inlet end to the flowing of suction hose water side, stops liquid self-absorbing water pipe water side to be flowed to suction hose water inlet end.Like this, liquid backflow when can prevent water pump from closing or when suction hose enters air in suction hose, avoids the solid-liquid of layering again to rile.
In preferred version, above-mentioned water absorber also comprises turbidity detection instrument, suction hose is provided with the Turbidity measurement head for detecting the turbidity of liquid in suction hose, Turbidity measurement head is connected with the signal input part of turbidity detection instrument, and the signal output part of turbidity detection instrument is connected with the controller of water pump.Turbidity measurement head detects (Turbidity measurement head, by launching certain light in a liquid, utilizes and is detected liquid to the scattering strength of light to detect turbidity) the liquid turbidity in suction hose; The result that Turbidity measurement head detects is input to turbidity detection instrument, and the turbidity data that Turbidity measurement head detects by turbidity detection instrument and turbidity data settings compare, and output control signals to the controller of water pump; The controller of water pump, according to the control signal from turbidity detection instrument, controls startup or the cut out of water pump.The data of turbidity can be calibrated, arrange and be recorded to turbidity detection instrument.Control according to the turbidity data arranged the terminal that absorbs water, prevent the danger that silver emulsion is sucked out, avoid and observe solid-liquid interface with human eye and the operate miss brought.In addition, when utilizing turbidity to control water suction, also can in the process of precipitation, precipitation limit, limit absorbs water, and shortens the sedimentation water washing operations time.
More preferably be provided with anti-baffle plate in above-mentioned suction hose, anti-baffle plate is in below Turbidity measurement head.The unnecessary light that Turbidity measurement hair can be penetrated by anti-baffle plate carries out absorbing and tackling, the emulsion preventing from light to be irradiated to precipitating below liquid.Suction hose is provided with check valve, above-mentioned Turbidity measurement head and anti-baffle plate are in above check valve.
For ease of the installation of Turbidity measurement head, and improve the degree of accuracy of Turbidity measurement, preferred above-mentioned suction hose has one section of sleeve pipe, Turbidity measurement head and anti-baffle plate are all located in this sleeve pipe.During specific design, anti-baffle plate and sleeve pipe can adopt the material of black to make; Anti-baffle plate can semicircular in shape, and anti-baffle plate is arranged on internal surface of sleeve pipe.Anti-baffle plate can perpendicular to casing centerline, also can be downward-sloping gradually to casing centerline from internal surface of sleeve pipe.
Water absorber of the present utility model is used for the absorption of sedimentation water elution salt phase supernatant liquid in photosensitive material emulsion production process, can either up hill and dale by supernatant liquid sucking-off, sucking-off can be avoided again to be deposited in the emulsion of lower floor, thus reduce the loss of expensive emulsion (silver emulsion), reduce washing times, shorten the operating time, enhance productivity, and make emulsion quality more stable.Water absorber of the present utility model is used for other application scenario needing supernatant liquid to be separated with lower sediment thing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred embodiment 1;
Fig. 2 is the structural representation of suction head in Fig. 1;
Fig. 3 is the top view of the housing of suction head in Fig. 1;
Fig. 4 is the internal structure schematic diagram of Fig. 1 middle sleeve;
Fig. 5 is the A-A sectional view of Fig. 4;
Fig. 6 is the structural representation of the utility model preferred embodiment 2.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, this water absorber comprises suction head 2, suction hose 1 and water pump 3, and suction head 2 upper end is provided with suction hose joint 21, and suction head 2 connects suction hose 1 by suction hose joint 21, and the water side of suction hose 1 connects the water inlet 31 of water pump 3.
Referring to figs. 2 and 3, suction head 2 comprises housing 22 and chassis 23 of catchmenting, and the edge on chassis 23 of catchmenting is connected with the edge of housing 22 lower ending opening, and housing 22 upper end is located at by suction hose joint 21; Housing 22 is provided with multiple suction hole 24, and chassis 23 of catchmenting has can the cavity 25 of receiving fluids, and suction hole 24 is communicated with the cavity 25 on chassis 23 of catchmenting; The water inlet end of suction hose 1 extend into and catchments in the cavity 25 on chassis 23, and suction hose joint 21 is connected with the outer wall of suction hose 1.
In the present embodiment, chassis 23 lower surface that catchments raises to its peripheral part gradually from centre, chassis 23 of catchmenting, the position that in the corresponding chassis cavity 25 that catchments of water inlet end of suction hose 1, the degree of depth is maximum.Because the centre of chassis 23 lower surface that catchments is protruded downwards, when suction head 2 absorbs water to after chassis 23 of catchmenting touches solid interface, can also suitably toward pressing down, as long as there is part suction hole liquid-immersed, still can continue water suction, supernatant liquid can be extracted as far as possible; And the liquid catchmented in chassis 23 collects in suction hose 1 water inlet end position, is convenient to sucking-off.
Catchment the outer margin contour on chassis 23 for circular, and housing 22 is in up-small and down-big truncated cone-shaped, and the outer margin contour on the shape of housing 22 lower ending opening and size and chassis 23 of catchmenting matches.Catchment between the edge on chassis 23 and the edge of housing 22 lower ending opening and removably connect, as clamping or be threaded, so that point demolition clean of suction head 2.
The diameter of suction hole 24 is 0.5-5 millimeter.
In the present embodiment, housing 22 is detachably provided with screen pack 26, the medial surface of screen pack 26 covering shell 22.This screen pack 26 can adopt stainless screen pack or bag type filtering net.Screen pack 26 can be fixed on suction head 2 with opening soon snap ring, can unpick and wash if desired.
Water pump 3 adopts self priming pump.
In the present embodiment, suction hose 1 is provided with a check valve 4, and check valve 4 to be in above suction head 2 and near suction head 2; Check valve 4 allows liquid self-absorbing water pipe 1 water inlet end to the flowing of suction hose 1 water side, stops liquid self-absorbing water pipe 1 water side to be flowed to suction hose 1 water inlet end.Like this, liquid backflow when can prevent water pump 3 from closing or when suction hose 1 enters air in suction hose 1, avoids the solid-liquid of layering again to rile.
The water absorber of the present embodiment also comprises turbidity detection instrument 5, suction hose 1 is provided with the Turbidity measurement head 6 for detecting the turbidity of liquid in suction hose 1, Turbidity measurement head 6 is connected with the signal input part of turbidity detection instrument 5, and the signal output part of turbidity detection instrument 5 is connected with the controller 32 of water pump 3.
With reference to figure 4 and Fig. 5, be provided with anti-baffle plate 7 in suction hose 1, anti-baffle plate 7 is in below Turbidity measurement head 6.The unnecessary light that Turbidity measurement head 6 is launched can carry out absorbing and tackling by anti-baffle plate 7, the emulsion preventing from light to be irradiated to precipitating below liquid.
Suction hose 1 has one section of sleeve pipe 8, Turbidity measurement head 6 and anti-baffle plate 7 are all located in this sleeve pipe 8.Anti-baffle plate 7 and sleeve pipe 8 can adopt the material of black to make; Anti-baffle plate 7 can semicircular in shape, and anti-baffle plate 7 is arranged on sleeve pipe 8 inwall.Anti-baffle plate 7 can perpendicular to sleeve pipe 8 center line, also can be downward-sloping gradually to sleeve pipe 8 center line from sleeve pipe 8 inwall.
Turbidity measurement head 6 and anti-baffle plate 7 are all in above check valve 4.
The operation principle of brief description once this water absorber:
During water suction, suction head 2 is put into supernatant liquid, liquid flows in the cavity (i.e. housing 22 and chassis 23 of catchmenting jointly surround cavity) of suction head 2 from the suction hole 24 housing 22, and be pooled under gravity and catchment in chassis 23, after the opening of liquid-immersed suction hose 1 water inlet end in chassis 23 of catchmenting, namely water pump 3 extracts these liquid by suction hose 1, and is discharged by liquid by the discharge outlet 33 of water pump 3.
When absorbing water to waterline lower than time to a certain degree, housing 22 is in a liquid partially submerged and part exposes in atmosphere (namely still have part suction hole 24 liquid-immersed), now the water inlet end of suction hose 1 also can be collected in the solution catchmented in chassis 23 and closed, and maintenance absorbs water.And, because liquid enters suction head 2 from suction head 2 side, therefore when suction head 2 is close to solid interface, current can be reduced on the sedimentary impact in below, avoid sediment to be sucked out.
Liquid turbidity in Turbidity measurement head 6 pairs of suction hoses 1 detects; The result that Turbidity measurement head 6 detects is input to turbidity detection instrument 5, and the turbidity data that Turbidity measurement head 6 detects by turbidity detection instrument 5 and turbidity data settings compare, and output control signals to the controller 32 of water pump 3; The controller 32 of water pump 3 is according to the control signal from turbidity detection instrument 5, the startup of control water pump 3 or closedown are (when the turbidity data that Turbidity measurement head 6 detects is greater than turbidity data settings, turbidity detection instrument 5 exports control signal makes water pump 3 close, and stops water suction).The data of turbidity can be calibrated, arrange and be recorded to turbidity detection instrument 5, controls according to the turbidity data arranged the terminal that absorbs water.In addition, when utilizing turbidity to control water suction, also can in the process of precipitation, precipitation limit, limit absorbs water, and shortens the sedimentation water washing operations time.
Embodiment 2
As shown in Figure 6, the present embodiment is on the basis of embodiment 1, is provided with one for controlling liquid-level switch 9(the present embodiment employing float type level switch that water pump 3 starts or cuts out in suction head 2 near the position of suction hose 1 water inlet end).When the water inlet end of suction hose 1 is by hydraulic seal, the ball float of liquid-level switch 9 up floats, and liquid-level switch 9 closes, and starts water pump 3 and absorbs water; When the water inlet end place of suction hose 1 has not had liquid to inhale, the ball float of liquid-level switch 9 has fallen down under gravity, and liquid-level switch 9 disconnects, automatic closing water pump 3.
During specific design, above-mentioned water absorber can comprise control circuit, liquid-level switch 9, the input connection that liquid-level switch 9 is corresponding to control circuit, and the output that the controller 32 of water pump 3 is corresponding to control circuit connects.Also by wire, liquid-level switch 9 can be connected with the controller 32 of water pump 3, directly be controlled startup or the closedown of water pump 3 by liquid-level switch 9.
Adopt liquid level and turbidity data jointly to control the terminal that absorbs water, when liquid-level switch 9 disconnects, or the liquid turbidity data that detect of Turbidity measurement head 6 higher than the turbidity data arranged time, water pump 3 cuts out, and stops water suction.
Claims (10)
1. a water absorber, comprise suction head, suction hose and water pump, suction head upper end is provided with suction hose joint, suction head connects suction hose by suction hose joint, the water side of suction hose connects the water inlet of water pump, it is characterized in that: described suction head comprises housing and chassis of catchmenting, and the edge on chassis of catchmenting is connected with the edge of housing lower ending opening, and housing upper end is located at by suction hose joint; Housing is provided with multiple suction hole, and chassis of catchmenting has can the cavity of receiving fluids, and suction hole is communicated with the cavity on chassis of catchmenting; The water inlet end of suction hose extend into and catchments in the cavity on chassis, and suction hose joint is connected with the outer wall of suction hose.
2. water absorber according to claim 1, is characterized in that: described in the chassis lower surface that catchments raise gradually to its peripheral part from center chassis position of catchmenting, the water inlet end correspondence of suction hose is catchmented the maximum position of the degree of depth in the cavity of chassis.
3. water absorber according to claim 1, is characterized in that: described in catchment the outer margin contour on chassis for circular, housing is up-small and down-big truncated cone-shaped.
4. water absorber according to claim 1, is characterized in that: described in catchment between the edge on chassis and the edge of housing lower ending opening and removably connect.
5. water absorber according to claim 1, is characterized in that: described housing is detachably provided with screen pack, the lateral surface of screen pack covering shell or medial surface.
6. the water absorber according to any one of claim 1-5, is characterized in that: the position near suction hose water inlet end in described suction head is provided with one for controlling the liquid-level switch of starting mode of pump or closedown.
7. the water absorber according to any one of claim 1-5, is characterized in that: described suction hose is provided with a check valve, and check valve to be in above suction head and near suction head; Described check valve allows liquid self-absorbing water pipe water inlet end to the flowing of suction hose water side, stops liquid self-absorbing water pipe water side to be flowed to suction hose water inlet end.
8. the water absorber according to any one of claim 1-5, it is characterized in that: described water absorber also comprises turbidity detection instrument, suction hose is provided with the Turbidity measurement head for detecting the turbidity of liquid in suction hose, Turbidity measurement head is connected with the signal input part of turbidity detection instrument, and the signal output part of turbidity detection instrument is connected with the controller of water pump.
9. water absorber according to claim 8, is characterized in that: be provided with anti-baffle plate in described suction hose, and anti-baffle plate is in below Turbidity measurement head.
10. water absorber according to claim 9, is characterized in that: described suction hose has one section of sleeve pipe, and Turbidity measurement head and anti-baffle plate are all located in this sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520322431.XU CN204723808U (en) | 2015-05-19 | 2015-05-19 | A kind of water absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520322431.XU CN204723808U (en) | 2015-05-19 | 2015-05-19 | A kind of water absorber |
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| CN204723808U true CN204723808U (en) | 2015-10-28 |
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| CN201520322431.XU Expired - Fee Related CN204723808U (en) | 2015-05-19 | 2015-05-19 | A kind of water absorber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906830A (en) * | 2015-05-19 | 2015-09-16 | 汕头市华天富工业发展有限公司 | Water suction device |
| CN107875703A (en) * | 2017-11-24 | 2018-04-06 | 北京欧美中科学技术研究院 | Efficient waste water pumping device |
-
2015
- 2015-05-19 CN CN201520322431.XU patent/CN204723808U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906830A (en) * | 2015-05-19 | 2015-09-16 | 汕头市华天富工业发展有限公司 | Water suction device |
| CN107875703A (en) * | 2017-11-24 | 2018-04-06 | 北京欧美中科学技术研究院 | Efficient waste water pumping device |
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Granted publication date: 20151028 Termination date: 20170519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |