CN104117233A - Piston-type minisize filter pump - Google Patents
Piston-type minisize filter pump Download PDFInfo
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- CN104117233A CN104117233A CN201310149894.6A CN201310149894A CN104117233A CN 104117233 A CN104117233 A CN 104117233A CN 201310149894 A CN201310149894 A CN 201310149894A CN 104117233 A CN104117233 A CN 104117233A
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Abstract
The invention discloses a piston-type minisize automatic pumping filter specially designed for laboratory use, a filter with a filter membrane is additionally arranged in a liquid one-way transport pipeline comprising a flow guiding pipe, a one-way valve, a piston and a small volume liquid barrel for completing the filtration, the one-way valve is used for separation of a liquid suction pipe and a liquid discharging pipeline, liquid transport power is directly provided by piston reciprocating motion; the rotation of a motor shaft is transformed into the linear motion of the piston by screw rod-nut transmission; liquid suction pipe and liquid discharging processes can be independently controlled and regulated; the rotation direction of a motor can be converted by automatic switching of the electrifying direction of the motor by use of a string for correlation of the movement of a reversing switch and the piston, and automatic piston reciprocating motion can be formed to realize automatic circulation of the liquid suction pipe and liquid discharging processes. When in use, the filtration can be realized only by connecting the flow guiding pipe, arranging the filter, electrifying, and adjusting the liquid discharging speed, the piston-type minisize automatic pumping filter is small in size, light in weight, convenient in operation and high in work efficiency, has other uses, and ist more suitable for laboratory filtration compared with other filter equipment.
Description
Technical field
The present invention relates to a kind of automatic filtering unit, utilize driven by power piston automatically to come and go and pump drainage liquid, in this process, realize and filter and can direct packaging collect liquid.Volume is little lightweight, uses easy and simple to handlely, and more existing other devices are more suitable for laboratory and filter.
Background technology
In the laboratory work in the fields such as medical treatment, scientific research, teaching, often need to filter with degerming removal of impurities some liquid, and sometimes must in superclean bench, carry out sterile working and make to collect liquid without microbial contamination.The conventional method of artificial aseptic filtration is with syringe, to extract the liquid that needs filtration in superclean bench, install disposable filter (the aseptic process mistake while dispatching from the factory with filter membrane, include the filter membrane of tool micropore), then in the reagent bottle of firmly crossing to aseptic process, extrude, take off again filter, extract the liquid that needs filtration, extrude, so circulation.Along with the carrying out of filtering, because being deposited on filtering membrane of filter of microorganism and other particles causes resistance increasing, row pressure action will become more and more painstaking, and speed is more and more lower.In artificial filter process, need repeatedly contacted filter and reagent bottle, have contaminated liquid and knock reagent bottle equivalent risk over, therefore need SC, and this has also reduced operating efficiency.
The artificial aseptic filtration inefficiency that wastes time and energy is risky again, so people have considered utilize and invent some laborsaving timesaving method or devices, but existing these methods or device all have open defect or deficiency.A little less than life often possesses the pullback capacity of overcoming with filter or heavier, cannot assembly experiment the shortcomings such as filter membrane for chamber, clean difficulty be large, can not meet the requirement that filter in laboratory.The powerful efficiency of industrial automatic fitration acc power is high, but volume is large and cost high energy consumption is high, and the filter membrane of laboratory special use or filter difficulty match, so workload is relatively little but require to filter high laboratory and filter and generally also do not consider to adopt.The automatic filtering machine of producing for laboratory filter design can be divided into two classes by principles and structure feature: bucket formula filter press and pump formula filter.While using bucket formula positive-pressure filtering machine, to first install large area type filter membrane, the liquid that wish is filtered packs filter into, then seal, switch on, utilize the pressure that dynamical system produces that liquid is extruded to (artificial positive-pressure filtering machine also needs manual inflation to produce high pressure) by filter membrane.The deficiency of bucket formula filter press is: because the first splendid attire liquid to be filtered of needs adds high pressure again, inconvenience is laid in the larger carrying of volume; Feet height under filter vat makes the container height of splendid attire collection liquid limited, often needs packing again; The process that filter membrane lays and dismounting, machine intimate are clean is loaded down with trivial details; Filter membrane and the position of laying filter membrane can not or be difficult to reach aseptic requirement, can not guarantee to collect liquid aseptic.Therefore bucket formula filter press aseptic require when strict not satisfactory.The feature of pump formula filter is that tun is not installed in machine, does not need to carry out liquid containing.Pump formula filter can be divided into negative pressure pump and positive pressure pump.When using negative pressure pump to filter, the container that connects successively Negative pressure machine (vavuum pump, suction machine etc.), transfer container, filter, mozzle, splendid attire liquid to be filtered, utilizes the negative pressure producing in transfer container of bleeding to come the process of pumping liquid to complete filtration.Negative pressure suction can only produce subatmospheric pressure difference, produce that enough large swabbing action overcomes filter membrane resistance and the resistance of ducting needs high-power power machine, and therefore with Negative pressure machine, often volume is larger in filtration, and whole connection takes up space greatly; Guarantee that the air-tightness that connects must be with the transfer container of supporting special use and bottle stopper, interface, so the packing again of the needs of the collection liquid in transfer container; While having strict aseptic requirement, whole device will be carried in superclean bench and use, and transfer container bottle stopper and interface need to clean and the processing such as autoclaving in advance.Whole operation seems, and loaded down with trivial details and efficiency is outstanding, therefore filter neither be desirable with Negative pressure machine automatic sterilized filter.When positive pressure pump filters as peristaltic pump or turbofan pump complete in fluid transport, if pipeline air-inlet can affect machine work, and pony pump overcomes the weakness of the low inefficiency of pullback capacity because power limited has, mammoth pump also has the high and defect that capacity usage ratio is low of the large energy consumption of volume, so these two kinds of pumps generally it goes without doing filter; Utilizing the device of inflator principle manually to carry out piston type suction-row pressure has circulated while filtering, need supporting with it desktop or superclean bench fixture or measure and use and be subject to certain limitation, and also it needs improvements just by the mode of manpower work.
These defects or deficiency based on existing use for laboratory filter, consider that for cost performance people often do not purchase these facilities, even has the phenomenon of seldom having used after these devices having bought.Particularly, in the filtration that has strict aseptic requirement, people seldom use filter and still adopt artificial filtration.Therefore design and manufacture that outward appearance is lighter and handier, operation automatic filtering machine easier, that particularly can meet aseptic requirement still has practical significance.
Summary of the invention
For thoroughly replacing the inefficiency risky artificial aseptic filtration removal of impurities mode again that wastes time and energy, and overcome existing filter volume large, use not easy, to be not suitable for aseptic filtration defect, be designed to that a kind of volume is little, easy and simple to handle, operating efficiency is high and can adapt to the automatic filtering machine of aseptic requirement.
The technical solution adopted for the present invention to solve the technical problems is: in conjunction with pump formula filter, transport continuously and do not need the feature and the upright barrel type filter press that install liquid additional to overcome the advantage that pullback capacity is strong, being designed to the electronic piston type pump drainage filter that automatically comes and goes.For reaching the object that reduces device volume and weight, in device, do not establish tun, but install filter membrane additional in the liquid uniport pipeline forming at mozzle, check valve, small-sized liquid-containg tube and piston, complete filtration, by check valve, imbibition pipeline and drain line are separated, by power-actuated piston, fluid transport is directly provided and filters power.By gear and screw mandrel-nut, guide rail, the rotation of motor arbor is changed into the rectilinear motion of piston, obtain uniform impetus and overcome the resistance in filter process.By cord, connect the motion association of reversing switch and piston and the energising direction of automatic switchover dc motor turns to convert it, make piston carry out automatic back and forth movement, realize the automatic cycle of imbibition and discharge opeing process.Imbibition and discharge opeing process can independently be controlled, and discharge opeing operating circuit connects speed regulator and commutation diode does not affect rate of liquid aspiration to regulate drain age velocity, in the time of in order to adjustment fluid transport system internal pressure, increase work efficiency.
The invention has the beneficial effects as follows: this device volume is little lightweight, can carry easily and lay and put into superclean bench use; Operation is controlled easy, only need load onto filter, connects mozzle during filtration, then switches on, adjusts drain age velocity; Simple in structure, cleaning is convenient; Thrust output is powerful, and operating efficiency is high.Meet the requirement that high efficiency filtration sterilization removal of impurities is carried out in the laboratories, field such as medical treatment, scientific research, teaching completely.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, structure of the present invention, operation logic, using method are further illustrated.
Fig. 1 is piston pump formula liquid uniport work principle of filter figure.F has the filter (be called for short filter, dotted line represents filter membrane with holes) of filter membrane in being), Vi, Vo are respectively the check valve of imbibition, drain line, and FC is small-sized liquid-containg tube (abbreviation liquid-containg tube), and P is piston, and arrow express liquid flows to.
Fig. 2 is overall structure figure of the present invention.1,2,3,4,5,6,7 be fixing and gripper shoe (abbreviation fixed head), 8 is screw mandrel, and 9 is bearing, and 10 is driving gear, and 11 is driven gear, and 12 is nut, and 13 is connecting plate, and 14 is straight line optical axis.M is dc motor, and S is for connecting cord, and K is reversing switch.Dotted line represents to encapsulate boundary line.
Fig. 3 is circuit diagram.Thick line representative connects power positive end, and it is extreme that fine rule representative connects power-, and M is motor, and R is speed-regulating potentiometer, and D is commutation diode.Dotted line is above for discharge opeing operating circuit (FOC), and dotted line is imbibition operating circuit (FIC) below, the voltage monitoring circuit (can select whether to connect) of the upper left corner for being comprised of bridge rectifier and current-limiting resistance, light emitting diode.
Fig. 4 is automatic reverse schematic diagram.P is piston handle, and K is reversing switch, and S is for connecting cord, and 13 is connecting plate, and horizontal straight dashed line represents movement locus and the scope of connecting plate 3, the operating circuit that group excellent position of arrow points K is connected.Fine line represents that connecting plate is positioned at position and the state of left and right connecting plate 13, P, K, S during two extreme positions.
Fig. 5 is device appearance and using method schematic diagram.Outward appearance after thick partial line indication device encapsulation, wherein box indicating Package boxes, on panel, a, b, c, d are followed successively by: discharge opeing speed governing knob, motor operating voltage indicator lamp, switch, dc source interface, Z is brace table.
The specific embodiment
1, in piston pump formula liquid uniport process, complete and filter to reduce device volume and to be beneficial to direct packaging.
For reducing volume, the liquid wish not being filtered during the device busy of the present invention design all loads, a but open circuit uniport process looping of structure: mozzle, filter F, check valve Vi and Vo, small-sized liquid-containg tube are connected as Fig. 1, Vi conducting flows to be pointed in liquid-containg tube, and Vo conducting flows to be pointed to outside liquid-containg tube.Therefore the use of two check valves makes the inflow (claiming again sample introduction, imbibition) of liquid and discharge be able in two pipelines, complete respectively.When piston P moves upward, under the effect of FC inner high voltage, liquid is discharged outside FC through Vo, F and mozzle, forms drain line, in this process, completes filtration; When piston moves downward, in FC, under the effect of low pressure, liquid flows in FC through mozzle, Vi, completes liquid and introduces, and forms imbibition pipeline.Vi and mozzle that Vo connects are inserted respectively in liquid and separation container to be filtered, the back and forth movement as long as piston can circulate, imbibition, discharge opeing process just can hocket repeatedly, and complete filtration, packing.
More small-sized peristaltic pump and small-sized turbofan pump, the present invention adopts the main advantage of small-sized piston pump to be: overcome pullback capacity strong, even also can produce very high thrust under promoting at a slow speed, while there is gas in fluid flow tube road, still can complete sample introduction and filtration.
2, with the transmission of screw mandrel-nut, by piston, change the rotation of motor arbor into imbibition and discharge opeing process.
As Fig. 2 (internal structure face effect, for pattern is succinctly connected and fixed with screw and does not all draw), between fixed head 1,2,3,4,5,6,7, with screw, be connected and fixed, form the frame of whole device.Liquid-containg tube FC is screwed on fixed head 2 and 3.Motor M is screwed on fixed head 4 and fixed head 6, and screw mandrel 8 is fixed on (bearing internal external is all used interference fit) on fixed head 6 by bearing 9 and can only rotates and can not carry out axially (level) and move.Gear 10 and 11 respectively with M arbor and screw mandrel 8 interference fit, 10 and 11 engagements, thus the axle of M while rotating screw mandrel 8 also can rotate.Nut 12 is enclosed within on screw mandrel 8, and piston P and nut 12 are all screwed on connecting plate 13.Two straight line optical axises 14 form the motion guide rail of nut 12-connecting plate 13-piston P assembly: optical axis 14 is through the hole (matched in clearance) on connecting plate 13, insert in fixed head 3 and fixed head 6 (on 3 and 6, the hole not connecting is opened in relevant position) at two ends, parallel with screw mandrel 8 and be symmetrically distributed in its both sides; Therefore when motor M drives screw mandrel 8 to rotate by gear 10 and 11, nut 12-connecting plate 13-piston P assembly can not rotate and can only slide along optical axis 14, forms rectilinear motion.When M arbor converts direction of rotation repeatedly, piston P will carry out back and forth movement, complete the circulation of imbibition, discharge opeing.
The present invention adopts screw mandrel-nut driving method to change rotation into rectilinear motion, its advantage is: if motor stability of rotation the movement velocity of piston and the strength that can produce just energy is even, and due to rotation direction of direct current motor can conveniently regulating and controlling (conversion energising direction), therefore can realize easily the independence and freedom of the round trip of piston is controlled to (detailed implementation method is shown in the specific embodiment 3 and 4).With common eccentric wheel, piston-connecting rod-crank mechanism or other sine mechanisms, realize above-mentioned two advantages that piston back-and-forth movement does not all possess screw mandrel-nut method.Although add the method for piston guide rail with heart-shaped line cam, also can realize the steady of piston movement speed and thrust, the method for the round trip of independence and freedom ground control piston is more complex; This method also needs to be unfavorable for Miniaturization Design compared with large wheel disc slewing area simultaneously.With adding tooth bar on piston handle, by the cog main deficiency of the method that drives of motor arbor, be: gear and the tooth bar of the short tooth pitch of low tooth are not wear-resistant, with the rack-and-pinion of the long tooth pitch of high tooth piston movement speed and thrust even not.
Make motor parallel with solution cylinder FC and piston axis and be positioned at the homonymy of fixed head 6, be conducive to reduce the length of whole device.
3, independently control imbibition and discharge opeing process so that control piper pressure and increasing work efficiency.
During energising opposite direction, the rotation direction of dc motor also can be contrary, design on this basis control circuit Fig. 3: because the both positive and negative polarity connection with power supply is contrary, by using double-pole four, throw reversing switch K, motor M can obtain from same power supply the energising of different directions, and only has a loop conducting at every turn; The on-position that switches reversing switch K can be realized the switching that motor turns to, and the on-position that repeatedly switches K can complete the circulation of imbibition and discharge opeing process.The resistance that does not have filter membrane to produce due to imbibition pipeline, and high rate of liquid aspiration is always conducive to improve filter efficiency, therefore allows imbibition process place maximum speed can and not need speed governing, in imbibition operating circuit (FIC), can not add speed governing element.Along with filtration is carried out, the particulate component depositing on filter inner filtration film is more and more, filtration resistance is by increasing, in discharge opeing operating circuit (FOC), need to add speed regulator R to adjust on demand drain age velocity (reason: overflow speed is low when filtration resistance is large, the piston driving velocity of discharge opeing process is too high easily causes liquid-containg tube FC, check valve Vo and Vi, filter F internal pressure is too high and damage these parts and cause connecting loose or dislocation, and the too high excessive transmission resistance bringing of FC internal pressure is also unfavorable to motor duty and service life simultaneously).When FIC energising and FOC during with power supply disconnection, due to the existence of commutation diode D, although there is the voltage drop can not generation current between M left end → R → D → M right-hand member, be equivalent to open circuit, therefore FIC is not subject to the impact of speed regulator R, regulates the position of speed regulator R can not affect rate of liquid aspiration.When FOC switches on power, can forward conduction due to D, the running of M and speed governing still can realize.
Two line ends that can be chosen in motor connect the voltage monitoring circuit (also can select micro electric to press indicator replacement current-limiting resistance+light emitting diode) being comprised of bridge rectifier and current-limiting resistance, light emitting diode, so that observation circuit duty and apparatus working failure judgement reason when abnormal.
4, by cord, the motion of piston is associated with reversing switch, realize imbibition and discharge opeing automatic cycle.
In distance between fixed head 3 and 6, liquid-containg tube FC, the thickness acting in conjunction of length, nut 12-connecting plate 13 sub-assemblies has limited the scope of activities of piston P, therefore there are two position limits in nut 12-connecting plate 13-piston P sub-assembly, when they move to extreme position, must commutate.The installation method of reversing switch is as follows: as Fig. 4, if the motion limit on the left position of connecting plate 13 is PL, limit on the right-right-hand limit position is PR, reversing switch K is dialled to an excellent side and towards piston, whole switch, is fixed on fixed head 1(or fixed head 5) upper (available seccotine or screw are fixed), in the time of fixedly, require the vertical center line of K to cross the mid point of PR and PL.Connecting cord S(requires soft, shrinkage-void, resistance to tension stronger, as nylon wire or strengthen cotton thread) method of attachment as follows: transmitting gear makes connecting plate 13 in-position PL, the rod of dialling of reversing switch K is allocated to a left side, S is strained to two ends and be fixed on dialling of connecting plate and K excellent upper (hole on connecting plate and fixing metal bar fixing in order to S is installed).According to PR and PL, about the symmetrical feature of K, connecting plate cord S when the PR of position also dials the rod of dialling of the K in straining at state to be pulled to the right side (becoming state KR); When connecting plate is between PR and PL, cord S can be in relaxed state, and K maintains the state that firm switching is come.When therefore connecting plate 13 is to left movement (discharge opeing) to position PL, reversing switch is dialled rod and is pulled to a left side (becoming state KL) by the pulling force of S, FIC energising and FOC power-off, nut 12-connecting plate 13-piston P assembly will become and move right, and complete the conversion to imbibition by discharge opeing; After commutation, because S becomes slack rapidly, K will maintain state KL, and imbibition process continues; When connecting plate continues to move right position PR, S is nervous, and the rod of dialling of K is pulled to the right side (becoming state KR), FIC power-off and FOC energising, and connecting plate drives piston to become to left movement, and imbibition transfers again discharge opeing to.So repeatedly until power-off.Therefore by cord by the switching of the reversing switch automatic switchover that can realize imbibition and discharge opeing associated with piston movement, reach the automation of whole filter process.
The advantage of carrying out the automatic back and forth movement of piston by this kind of mode is: simple, do not need to install drive circuit board and mcu programming etc., therefore when reducing manufacturing cost, be beneficial to the miniaturization of product, and the assembling maintaining of device is also simpler.
5, device appearance and using method
As Fig. 5, frame, power and transmission mechanism, the circuit connection of device all can be by the encapsulation of square box shape shell (fixed head 1,5,7 all available screw and encapsulating housing be connected and fixed), liquid-containg tube FC part is to install filter, mozzle etc. (FC is used the transparent materials such as lucite, thereby regulates drain age velocity to observe piston movement state).Liquid-containg tube FC and check valve be connected with triple valve or other be rotatably connected part so that check valve can convert towards.On package casing, main devices is discharge opeing speed governing knob, motor operating voltage indicator lamp, switch, dc source interface.While working due to superclean bench, cabinet door opening is unsuitable large, limited the height that can extend upwardly when hand operates in cabinet, therefore by the axle of FC and the design of piston movement direction, in horizontal plane (horizontal) (also can and need to adopt vertical placement according to environment for use, be about to the dextrorotation of thick line part and turn 90 degrees placement to reduce the height of installation filter F and mozzle position; Also the flexible pipe of available sterilizing connects filter and sub-bottling).Within not needing that liquid to be filtered is contained in to machine before filtering, whole device volume is little, lightweight, is beneficial to carrying and lays.
During use, only filter F, mozzle need be connected and installed as Fig. 5, the mozzle being connected with Vi stretches into the liquid outlet of liquid to be filtered, filter F and aims at separation container, then switches on, regulates drain age velocity.Owing to collecting liquid, can directly enter separation container, not need transfer and be not subject to separation container shape and the restriction (can select suitable object to make brace table according to the height of container) of size height.If wish is to carrying out disinfection in fluid flow tube road or cleaning, the liquid of uneasy fixed filter, suction is changed to the operation of then switching on of thimerosal or distilled water, without any main element of dismounting.If this device is put into superclean bench, by the requirement of sterile working, carry out in advance when surface sprinkling bactericidal agent ultraviolet ray irradiation waits surface sterilizing to process, filter using disposable sterilized filter, can realize aseptic filtration operation (completing with the tweezers of baked wheaten cake sterilizing while being linked and packed mozzle and filter).As a kind of piston type auto-pumping machine, liquid of the present invention can be used for carrying out liquid transfer, pump drainage, compare the advantage possessing in use without using transfer container with general negative pressure suction machine, and compare to possess with normally used small-sized peristaltic pump and turbofan pump, overcome the advantage that pullback capacity by force, is not subject to gases affect in pipeline; Load onto fog-spray nozzle and also can be used as antomobile sprayer.Therefore invention volume is little lightweight, easy to use, meets the requirement that filter in laboratory completely, and can develop other purposes.
6, embodiment
Parts and material: the principle machine of trial-produceing successfully according to above-mentioned mentality of designing, power source M used is 12V40W dc motor (band reducing gear, maximum (top) speed is 120 revs/min), supporting power supply is DC12V5A, driving gear 10 is 1.5M28 tooth, driven gear 11 is 1.5M14 tooth, using diameter 8mm double end trapezoidal thread (pitch 2mm) screw mandrel 8 be equipped with corresponding brass nut 12 as rotation-rectilinear motion bridgeware, bearing 9 external diameter 22mm internal diameter 8mm, be the straight line optical axis 14 diameter 6mm that guide rail is used, between piston handle and connecting plate 13, be screwed; Control circuit reversing switch K used is MTS-202 type (AC6A125V), speed regulator R is 12 volts of DC speed regulators of C1228 type, commutation diode D is IN5408 type (3A), motor operating voltage indicating device is for to be formed by connecting with bridge rectifier and 12 volts of DC voltage indicator lamps, connecting plate 13 and reversing switch S dial between rod be connected fine rule S be nylon setline (with 4 diameter 1mm cotton threads arranged side by side also can), dial excellent end with gluingly firmly fixing to prevent that line from coming off on rigid plastics snare and with 502.Mozzle is internal diameter 4mm white emulsion tube, and Vi, Vo are respectively the flat floating ball type one-way valve of interface 4mm, 3mm, and liquid-containg tube FC and piston P replace with 20ml plastic injector, triple valve while connecting check valve and injector syringe.Connecting plate, frame, package casing all with aluminum alloy plate materials through cutting, Drilling operation forms, each parts be connected and fixed main uses M4 screw (nut 12 and connecting plate 3 use M3 screws are connected and fixed).
Device appearance: the principle machine of manufacturing experimently according to above-mentioned mentality of designing, face shaping feature is consistent with Fig. 5, full weight 2.5kg, the package casing of main part is of a size of as 155mm * 101mm * 136mm square box (external and internal shells 3mm), the injector syringe leaking outside and connecting tee overall length 1 40mm.One hand can be lifted and grip, and can put into easily superclean bench.
Implementation result: the maximum piston driving velocity of principle of the invention machine is 15mm/S.Use experiment disposable filtering sterilization device, per hour can filter liquide 5000ml.Regulate drain age velocity adjusting knob, discharge opeing process can be in friction speed, and rate of liquid aspiration is located maximum rating all the time.In operation process, device, without obviously moving horizontally or vertical jumping phenomena, does not need fixture or measure.
Claims (5)
1. the miniature filter pump of piston type installs filter membrane additional in the liquid uniport pipeline being comprised of mozzle, check valve and small-sized liquid-containg tube, piston, carries out back and forth movement complete filtration by driven by power piston.
2. micro-piston-type filter pump according to claim 1, it is characterized in that: in the liquid uniport pipeline being formed by mozzle, check valve and small-sized liquid-containg tube, piston, install filter membrane additional, utilize two check valves to control flow direction and form imbibition pipeline and drain line, in the imbibition being formed by piston back-and-forth movement, discharge opeing circulation, complete sample introduction, filter process direct packaging and collect liquid.
3. micro-piston-type filter pump according to claim 1, it is characterized in that: by parts such as gear and screw mandrel-nut and connecting plate, fixed heads, the rotation of motor arbor is changed into the rectilinear motion of piston, obtain stably driving velocity and thrust to overcome the resistance in filter process.
4. micro-piston-type filter pump according to claim 1, it is characterized in that: utilize the effect of reversing switch, commutation diode that imbibition, discharge opeing operating circuit is separated, regulate drain age velocity and do not affect rate of liquid aspiration, be beneficial to maintenance work efficiency in adjusting device internal pressure and resistance.
5. miniature micro-piston-type filter pump according to claim 1, it is characterized in that: with cord, reversing switch is associated with piston movement, automatic switchover energizing DC motor direction, to realize the automatic back and forth movement of piston, completes the automatic cycle of imbibition, discharge opeing process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310149894.6A CN104117233A (en) | 2013-04-26 | 2013-04-26 | Piston-type minisize filter pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310149894.6A CN104117233A (en) | 2013-04-26 | 2013-04-26 | Piston-type minisize filter pump |
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| CN104117233A true CN104117233A (en) | 2014-10-29 |
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| CN201310149894.6A Pending CN104117233A (en) | 2013-04-26 | 2013-04-26 | Piston-type minisize filter pump |
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Cited By (7)
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| CN105641997A (en) * | 2016-01-26 | 2016-06-08 | 蚌埠市风驰滤清器有限公司 | Filter capable of preventing backflow |
| CN105855089A (en) * | 2016-05-26 | 2016-08-17 | 余斌 | Fluid supply device of plunger pump and plunger pump control system |
| CN108572104A (en) * | 2017-03-07 | 2018-09-25 | 中国科学院寒区旱区环境与工程研究所 | A kind of Multi-channel liquid sample filtering adsorbent equipment |
| CN113371858A (en) * | 2021-06-23 | 2021-09-10 | 中建八局第二建设有限公司 | Building engineering water supply and drainage filter equipment |
| WO2021196675A1 (en) * | 2020-04-01 | 2021-10-07 | 苏州金唯智生物科技有限公司 | Dna filtering and sterilizing device |
| CN116617756A (en) * | 2023-07-24 | 2023-08-22 | 山东泰山健康科技有限公司 | Glossy ganoderma spore oil filter |
| CN117839436A (en) * | 2024-03-06 | 2024-04-09 | 山西绿泉环保工程有限公司 | Reverse osmosis membrane online cleaning and desalination performance testing device |
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| CN105641997A (en) * | 2016-01-26 | 2016-06-08 | 蚌埠市风驰滤清器有限公司 | Filter capable of preventing backflow |
| CN105641997B (en) * | 2016-01-26 | 2018-10-12 | 蚌埠市风驰滤清器有限公司 | A kind of filter for capableing of anti-backflow |
| CN105855089A (en) * | 2016-05-26 | 2016-08-17 | 余斌 | Fluid supply device of plunger pump and plunger pump control system |
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Application publication date: 20141029 |