Piston type liquid-transfering deviceTechnical field
The utility model relates to a kind of liquid-transfering devices, it particularly relates to a kind of for fixed in environmental project experimentationAmount pipettes the piston type liquid-transfering device of organic extractant.
Background technique
Pipette is to measure formula instrument for accurately measure the solution of certain volume, and dosage liquid is needed in environmental monitoringPipe quantitatively pipettes the organic extractant solution agent for gas or liquid monitoring, and traditional method is the side by ear washing bulb air-breathingFormula carries out taking liquid using measuring pipet.Pipette currently used for pipetting organic extractant solution agent is straight trip glass up and downPipette is placed in installation extractant to be pipetted by pipe, when use, by the air in discharge upper end ear washing bulb cavity with benefitWith negative pressure absorbing extractant, when carrying out the pipetting of extractant by pipette in this way, often because of index fingerIt operates immature or causes liquid relief to fail using fatigue, thus need to make repeated attempts, when the degree of extruding is excessive, the solution of suckingIt is possible that overflowing pipette, part solution is caused to enter in ear washing bulb, operation control difficulty is big, causes liquid relief inaccurate.In addition,In environmental chemical analysis experimentation, it is often used fluidization extractant, and amount of reagent has strict demand, sucks pipetteThe volume of interior solution is related with the extruding degree of ear washing bulb, since the extruding degree of ear washing bulb is difficult to accurately hold, when extruding journeyWhen spending inadequate, the liquid level of solution is not reached requirement, it is necessary to be re-operated, current pipette is that single tube takes liquid, flat doingWhen row laboratory, due to needing repeatedly to pipette same amount of extractant, it is necessary to be repeated as many times with single tube and carry out imbibition transfer, noOnly it is laborious it is time-consuming, working efficiency is low, and operation is easy to appear fault, to reduce the accuracy of experimental result.
Utility model content
In view of the above shortcomings, the utility model provides one kind and needs repeatedly to pipette equal amount when doing parallel laboratory test roomExtractant, do not need to be repeated as many times with single tube and carry out the operation of imbibition transfer, it is time saving and energy saving, pipetting process is effectively reducedIn fault rate, the efficiency of liquid relief not only can be improved, the piston type liquid-transfering device of the accuracy of experimental result also can be improved,It includes pedestal, piston structure, at least two measuring pipets, magnetic one-way valve and magnet ring, and the base interior is equipped with cavity, describedThe top of pedestal is equipped with the mounting cylinder for installing piston structure, and the mounting cylinder is connected with the cavity of the pedestal, describedThe bottom of pedestal is connected at least two measuring pipets；The piston structure is arranged in the mounting cylinder, the piston structure packetInclude lumen, piston body, piston rod, the drawing handle, reset helical spring and air back valve, the lateral wall of the lumen withIt is connected between the inner sidewall of the mounting cylinder for hermetic seal, the lumen side wall is equipped at least one air up and downRecirculation hole, the lumen make lumen keep being connected to ambient atmosphere, set on the downside wall of the lumen by air-through holesThere is suction hole up and down, the lumen is connected by suction hole with the cavity of pedestal, and the piston body is slidably installed in describedIn lumen, the bottom end of the piston rod is fixedly connected with the piston body, and the top of the piston rod and the drawing handle are solidFixed connection, the reset helical spring are set on piston rod, and are resetted helical spring and be arranged between lumen and drawing handle；Each measuring pipet is equipped with liquid storage chamber, and the top that each measuring pipet corresponds to the top end opening of liquid storage chamber is equipped with magnetic singleTo valve, the magnetic one-way valve includes that one-way fluid channel, magnetic ball-cock assembly and floating ball pallet, the floating ball pallet are arranged in instituteIt states in one-way fluid channel, the center of the floating ball pallet is equipped with arc-shaped slot up and down, the floating ball palletEdge is equipped with through flow hole up and down, and the magnetism ball-cock assembly is embedded in the arc-shaped slot, the outside of the measuring pipetPosition on wall corresponding to the one-way fluid channel is equipped with the magnet ring that can be moved up and down along the length direction of measuring pipet, and magnetism is floatingBall valve is using hollow ball made of magnetic material, and the magnet ring is matched with the magnetic ball-cock assembly, the one-way fluidChannel is made of interconnected tapered channel, Vertical Channel and limit channels three parts, and the magnetism ball-cock assembly passes through describedFloating ball pallet is arranged in the Vertical Channel, and the internal diameter of the tapered channel is from measuring pipet top to the direction of measuring pipet bottom endIt is gradually increased, the diameter of the magnetism ball-cock assembly is greater than the diameter at tapered channel lowest calibre.
In order to further realize the present invention, correspond on the piston body piston rod two sides symmetrically set there are twoAir back valve, the air back valve include valve seat, silicone valve, and the center of the valve seat is equipped with air flue, the valveIt is located at the air flue two sides on seat and is equipped with valve block gear edge, the top of the valve seat, the silica gel valve is arranged in the silicone valveOne end of piece is fixedly connected on the valve block gear of the valve seat side along upper, and the other end of the silicone valve is connected to the valve seatThe valve block of the other side is kept off along upper.
In order to further realize the present invention, the tapered channel is by corrosion-resistant, anti-aging rubber material or silica gel materialMaterial is made.
In order to further realize the present invention, the outer surface of the magnetism ball-cock assembly is coated with rubber membrane or pellosil.
In order to further realize the present invention, tapered suction inlet is designed in the bottom end imbibition port of the measuring pipet.
The utility model has the beneficial effects that
1, the piston type liquid-transfering device of the utility model, it includes pedestal, piston structure and four measuring pipets,Base interior is equipped with cavity, and the piston structure for aspirating extractant, the bottom of pedestal are equipped in the top mounting cylinder of pedestalConnection, which there are four measuring pipet, by piston structure suction pipettes extractant and can reduce, pipettes the operation of extractant using pipetteDifficulty, and multiple measuring pipets are arranged in parallel on the base, can carry out liquid relief to multiple measuring pipets simultaneously, overcome traditional use singlePipe takes liquid, needs repeatedly to pipette same amount of extractant when doing parallel laboratory test room, it is necessary to is repeated as many times and be inhaled with single tubeLiquid transfer, laborious defect time-consuming, working efficiency is low, is effectively reduced the fault rate during pipetting, not only can be improvedThe accuracy of experimental result also can be improved in the efficiency of liquid relief.
2, the piston type liquid-transfering device of the utility model, is provided with the piston structure for aspirating extractant, pistonStructure includes lumen, piston body, piston rod, drawing handle, resets helical spring and air back valve, corresponds on piston body and livesThe two sides of stopper rod are symmetrically set there are two air back valve, and air back valve includes valve seat, silicone valve, in use, firstDrawing handle is first firmly pressed down on, it is opposite to lower generation in lumen that drawing handle compression resets coil spring urges piston bodySliding, under the pressure difference effect of upper and lower surface, will be upturned the silicone valve of air back valve bending, allow at this timeThe airway open of valve seat opens conducting, just overcomes piston body and is not allowed due to larger positioned at lower space compressed air pressureThe defect easily moved down, so that piston body can be moved down relatively easily in lumen；It moves on the piston bodyTo the second extreme position (when the bottom face of second piston body and the inconsistent inner bottom surface of lumen), revocation is applied on drawing handleDownward push active force, drawing handle reset helical spring elastic acting force under the action of, drive piston body in lumenInterior upward generation Relative sliding, the silicone valve of air back valve is under the pressure difference effect of upper and lower surface by valve seat at this timeValve block gear edge blocking, silicone valve will be close to downwards valve block gear edge, allow the air flue of valve seat to be in baffle seal closedLimiting condition, allows in this way in lumen and the air above piston body cannot be by air flue, and intraluminal air pressure is notBreak and reduce and form negative pressure, until piston body is pressed upwards on to the first extreme position (top end face of piston body and the interior table of lumenWhen face is inconsistent), it and so on pushes and pulls, so that it may aspirate the inner cavity of lumen and pedestal close to vacuum, thus in lumen and baseUnder the interior intracavitary suction function of seat, extractant to be pipetted enters the taper suction inlet of each measuring pipet, extractant to be pipettedIt will constantly be inhaled into the liquid storage chamber of each measuring pipet, it is easy to operate, it is easy to use.
3, the piston type liquid-transfering device of the utility model, the interior top end opening corresponding to liquid storage chamber of each measuring pipetTop position is equipped with magnetic one-way valve, and being equipped on the lateral wall of measuring pipet corresponding to the position of tapered channel can be along measuring pipetThe magnet ring that length direction moves up and down, has magnetic magnetic ball-cock assembly and magnet ring is cooperated by magnetic, when the storage of measuring pipetWhen being full of extractant in sap cavity, the extractant in liquid storage chamber will pass sequentially through the top end opening of liquid storage chamber, on floating ball palletFloating ball pallet enters in one-way fluid channel, and the magnetic ball-cock assembly being arranged on floating ball pallet is transported upwards under the action of buoyancyIt is dynamic, and the most significant end for enabling magnetic ball-cock assembly to be located at tapered channel under the effect of the magnetic attracting force of magnet ring blocks taperChannel, to effectively prevent causing liquid to be ejected to pedestal during drawing extractant fluid into measuring pipet in piston structureIn cavity, to repeatedly pipette identical liquid measure and achieve the effect that quick and precisely to pipette extractant.And when the extraction in measuring pipetWhen agent excess, need to only remove magnet ring on the lateral wall of measuring pipet so that the equal sky of magnetic ball-cock assembly of tapered channel stay it is one tinyThe gap for extractant circulation, then slowly push down on drawing handle and each measuring pipet made to pass sequentially through the interior of pedestalChamber, lumen, the air flue opened on valve seat are connected to ambient atmosphere, from extractant extra in measuring pipet being slowly discharged,When the graduation mark of the solvent needed for the liquid level of measuring pipet is reached and measured, magnet ring is moved to original position, and in the magnetism of magnet ringThe lower most significant end for enabling magnetic ball-cock assembly to be located at tapered channel of attraction effect blocks tapered channel, to avoid measuring pipetThe extractant liquid of interior absorption is since gravity declines the accuracy for generating leakage and influencing liquid relief, so that it is quick to reach liquid reliefAccurate effect.
4, the piston type liquid-transfering device of the utility model, since the lumen of piston structure is a confined space, oftenWhen piston body reset helical spring press upwards on it is primary to the first extreme position, so that it may quantitative draw is equivalent to lumen volumeWhen long-pending organic extractant such as lumen volumetric values is 50ml, then whenever second piston body is back and forth pressed to the second extreme positionOnce, then piston body pressed upwards on by reset helical spring primary to the first extreme position, so that it may will be equivalent to 50ml'sExtractant is drawn to four measuring pipets if the capacity of measuring pipet is very big simultaneously respectively can pass through continuous repeated presses piston knotStructure is to draw full the needs of testing required extractant, meeting large capacity measuring pipet while taking liquid.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is that the piston structure of the utility model is in schematic cross-sectional view when pushing away straight down；
Fig. 3 is that the piston structure of the utility model is in schematic cross-sectional view when drawing straight up；
Fig. 4 is the sectional structure signal that the piston structure of the utility model is in air back valve when pushing away straight downFigure；
Fig. 5 is the sectional structure signal that the piston structure of the utility model is in air back valve when drawing straight upFigure；
Fig. 6 is the piston body of the piston structure of this utility model and the top view of air back valve.
Fig. 7 is the structural schematic diagram of the measuring pipet of the utility model, magnetic one-way valve and magnet ring.
Specific embodiment
The utility model is further elaborated with reference to the accompanying drawing, wherein the direction of the utility model is mark with Fig. 1It is quasi-.
As shown in Figures 1 to 7, the piston type liquid-transfering device of the utility model, it include pedestal 1, piston structure 2,Four measuring pipets 3, magnetic one-way valve 4 and magnet ring 5, in which:
Pedestal 1 is equipped with cavity in being laterally arranged inside pedestal 1, the top of pedestal 1 is equipped with for installing piston structure 2Mounting cylinder 11, mounting cylinder 11 are connected with the cavity of pedestal 1, and mounting cylinder 11 and pedestal 1 are integrally formed.The bottom of pedestal 1 is equipped withFour are used to connect the connectivity port of measuring pipet 3, and each connectivity port is connected with the cavity of pedestal 1, each connectivity portLateral surface be equipped with external screw thread.
Piston structure 2 is arranged in the mounting cylinder 11 of pedestal 1, and piston structure 2 includes lumen 20, piston body 21, piston rod22, drawing handle 23, reset helical spring 24 and air back valve 25, between 20 lateral wall of lumen and the inner sidewall of mounting cylinder 11Connection is contacted and be kept fixed for hermetic seal, and the air-through holes 201 there are two up and down, lumen are set in 20 side wall of lumen20 make lumen 20 keep being connected to ambient atmosphere by two air-through holes 201, and 20 downside wall of lumen is equipped on oneThe suction hole 202 of lower perforation, lumen 20 are connected by suction hole 202 with the cavity of pedestal 1, are located on lumen 20 corresponding to logicalHole site is additionally provided with spring mounting seat 204.
Piston body 21 is slidably installed in lumen 20, is contacted between piston body 21 and the inner sidewall of lumen 20 for hermetic seal, pistonThe middle position of one side of the bottom end of bar 22 with piston body 21 far from pedestal 1 is fixedly connected, the top of piston rod 22 and push-and-pullHandle 23 is fixedly connected, reset helical spring 24 be set on piston rod 22, and reset helical spring 24 setting lumen 20 with(both ends for resetting helical spring 24 are connected on the lower surface of drawing handle 23 respectively and the top of lumen 20 between drawing handle 23On the spring mounting seat 204 of end face).Two sides on piston body 21 corresponding to piston rod 22 are symmetrically set there are two airCheck-valves 25, air back valve 25 include valve seat 251, silicone valve 252, and wherein the center of valve seat 251 is equipped with air flue2511, and be equipped with valve block in 2511 two sides of the air flue of valve seat 251 and keep off along 2512, silicone valve 252 has flexibility using a kind ofThe silica gel piece material good, compression strength is big, sealing performance is high is made, and silicone valve 252 is in be horizontally installed on the upper of valve seat 251Portion, the valve block that one end of silicone valve 252 is fixedly connected on 251 air flue of valve seat, 2511 side keep off the silicone valve along 2512The valve block that 252 other end is connected to 251 air flue of valve seat, 2511 other side is kept off along 2512, allows for silicone valve 252 in this wayTool there are two types of limiting condition, a kind of limiting condition be silicone valve 252 downwards by the valve block gear on valve seat 251 along 2512 resistanceGear, silicone valve 252 will be close to valve block gear along 2512, allow the air flue 2511 of valve seat 251 to be fully blocked closing, to prevent gasStream passes through；Another limiting condition is that silicone valve 252 is upturned and is bent with the valve block gear on valve seat 251 along 2512 pointsFrom opening, the air flue 2511 of valve seat 251 is allowed to open conducting, to allow air-flow to pass through.
Each measuring pipet 3 is the glass pipet that capacity is 5~50ml, and the top port of each measuring pipet 3 passes through switchingConnector is bolted on the connectivity port of the bottom of pedestal 1, and 3 lateral wall of measuring pipet is equipped with to measure the scale of extract liquor, amountTapered suction inlet 32 is designed in the bottom end imbibition port of liquid pipe 3, and the middle position of 3 length direction of measuring pipet is equipped with liquid storage chamber 31.
Magnetic one-way valve 4 is for preventing from causing liquid during drawing extractant fluid into measuring pipet 3 in piston structure 2It is ejected in the cavity of pedestal 1, the position in each measuring pipet 3 corresponding to the top of its 31 top end opening of liquid storage chamber is respectively provided with oneA magnetic one-way valve 4, each magnetic one-way valve 4 include one-way fluid channel 41, magnetic ball-cock assembly 42 and floating ball pallet 43, are floatedBall tray 43 is arranged in one-way fluid channel 41, and the center of floating ball pallet 43 is equipped with arc-shaped slot up and down, floatsThe edge of ball tray 43 is equipped with through flow hole 431 up and down, and magnetic ball-cock assembly 42 is embedded the arc-shaped slot in floating ball pallet 43It is interior.One-way fluid channel 41 is made of interconnected tapered channel 411, Vertical Channel 412 and 413 three parts of limit channels,Magnetic ball-cock assembly 42 is movably arranged in the tapered channel 411 and Vertical Channel 412 in one-way fluid channel 41, so that magnetic floatingBall valve 42 can pump in tapered channel 411 and Vertical Channel 412.Tapered channel 411 and Vertical Channel 412 are equalAxial direction along measuring pipet 3 is extended, and the internal diameter of tapered channel 411 is by 3 top of measuring pipet to 3 bottom end of measuring pipetDirection is gradually increased, and the diameter of magnetic ball-cock assembly 42 is greater than the diameter at 411 lowest calibre of tapered channel, so that magnetic floatingThe most significant end that ball valve 42 is located at tapered channel 411 can block tapered channel 411.Tapered channel 411 is by corrosion-resistant, anti-agingRubber material or silica gel material be made, the magnetic hollow ball of tool is made using magnetic material in magnetic ball-cock assembly 42, emptyBulbus cordis body is also made of having magnetic lightweight metal material, the outer surface cladding a thin layer rubber membrane of magnetic ball-cock assembly 42 orOn the one hand person's pellosil makes magnetic ball-cock assembly 42 have corrosion resistance, on the other hand makes magnetic 42 surface layer of ball-cock assemblyFlexible flexible film and tapered channel 411 fit closely and reach more sealing blocking effect.The outside of measuring pipet 3It is equipped with corresponding to the position of tapered channel 411 on wall and can have magnetism along the magnet ring 5 that the length direction of measuring pipet 3 moves up and downMagnetic ball-cock assembly 42 and magnet ring 5 by magnetic cooperation so that measuring pipet 3 is after negative pressure absorbing extract liquor, magnetic ball-cock assembly42 can firmly be adsorbed on the position of 411 liquid outlet of tapered channel in one-way fluid channel 41, to pass through magnetic ball-cock assembly 42The top end opening for unidirectionally opening its liquid storage chamber 31 of measuring pipet 3 is realized with the cooperation of magnet ring 5, so that effect is prevented in piston structure 2Liquid is caused to be ejected in the cavity of pedestal 1 during drawing extractant fluid into measuring pipet 3.
The basic functional principle of the piston type liquid-transfering device of the utility model: in use, firmly pressing down on firstThe drawing handle 23 of piston structure 2 in the mounting cylinder 11 of pedestal 1 is set, and the compression of drawing handle 23 of piston structure 2 is multiplePosition helical spring 24 resets the elastic acting force of helical spring 24 to overcome, and drawing handle 23 pushes piston body 21 in lumen 20Introversion is lower to occur Relative sliding, and the silicone valve 252 of air back valve 25, will under the pressure difference effect of upper and lower surface at this timeBe upturned bending, and the air flue 2511 of valve seat 251 is allowed to open conducting, just overcomes piston body 21 due to being located under itPortion's space compression atmospheric pressure is larger and is not easy the defect moved down, so that piston body 21 can relatively easily existLumen 20 moves down；The second extreme position (bottom face and lumen 20 of second piston body 21 is moved on on piston body 21Inner bottom surface it is inconsistent when), cancel the downward push active force that is applied on drawing handle 23, the drawing handle of piston structure 223 under the action of resetting the elastic acting force of helical spring 24, move up the work being arranged in the mounting cylinder 11 of pedestal 1The drawing handle 23 of plug structure 2 drives piston body 21 that Relative sliding occurs upwards in lumen 20, at this time air back valve 25Silicone valve 252 is kept off the blocking along 2512, silicone valve by the valve block on valve seat 251 under the pressure difference effect of upper and lower surface252 will be close to downwards valve block gear along 2512, and the air flue 2511 of valve seat 251 is allowed to be in the closed limiting condition of baffle seal, thisSample allows in lumen 20 and the air above piston body 21 cannot be by air flue 2511, and the air pressure in lumen 20 is continuousReduce and form negative pressure, until piston body 21 is pressed upwards on to the first extreme position (top end face of piston body 21 and lumen 20When contacted inner surfaces touch), it and so on pushes and pulls, so that it may aspirate the inner cavity of lumen 20 and pedestal 1 close to vacuum, thus in pipeUnder the interior intracavitary suction function of chamber 20 and pedestal 1, extractant to be pipetted enters the taper suction inlet 32 of each measuring pipet 3, toThe extractant pipetted will be constantly inhaled into the liquid storage chamber 31 of each measuring pipet 3, be extracted when being full of in the liquid storage chamber 31 of measuring pipet 3When taking agent, the extractant in liquid storage chamber 31 will pass sequentially through the top end opening of liquid storage chamber 31, the floating ball support on floating ball pallet 43Disk 431 enters in one-way fluid channel 41, and it is upward under the action of buoyancy that the magnetic ball-cock assembly 42 on floating ball pallet 43 is arranged inMovement, and the most significant end for enabling magnetic ball-cock assembly 42 to be located at tapered channel 411 under the effect of the magnetic attracting force of magnet ring 5 sealsTapered channel 411 is blocked, to effectively prevent causing liquid during drawing extractant fluid into measuring pipet 3 in piston structure 2Body is ejected in the cavity of pedestal 1, to repeatedly pipette identical liquid measure and achieve the effect that quick and precisely to pipette extractant.EquivalentWhen extractant excess in liquid pipe 3, the magnet ring 5 on the lateral wall of measuring pipet 3 need to be only removed, so that the property of tapered channel 411 is floatingThe equal sky of ball valve 42 stays a tiny gap for extractant circulation, then slowly pushes down on drawing handle 23 and make each amount liquidPipe 3 passes sequentially through the inner cavity of pedestal 1, lumen 20, the air flue 2511 opened on valve seat 251 are connected to ambient atmosphere, from can willExtra extractant is slowly discharged in measuring pipet 3, mobile when the liquid level of measuring pipet 3 reaches the graduation mark for measuring required solventMagnet ring 5 arrives original position, and makes magnetic ball-cock assembly 42 be located at tapered channel 411 under the effect of the magnetic attracting force of magnet ring 5Most significant end can block tapered channel 411, to avoid the extractant liquid drawn in measuring pipet 3 due to gravity declineIt generates leakage and influences the accuracy of liquid relief, to reach liquid relief fast and accurately effect.Since lumen 20 is a confined airBetween, whenever piston body 21 reset helical spring 24 press upwards on it is primary to the first extreme position, so that it may quantitative draw is equivalent toWhen the organic extractant of 20 volume volume of lumen such as 20 volumetric values of lumen is 50ml, then whenever back and forth will be under second piston body 21It is primary to be depressed into the second extreme position, is then pressed upwards on piston body 21 to the first extreme position one by reset helical spring 24It is secondary, so that it may which that will be equivalent to the extractant of 50ml respectively while drawing can if the capacity of measuring pipet 3 is very big to four measuring pipets 3Full required extractant is tested by continuous repeated presses piston structure 2 to draw.
The foregoing is merely better embodiments of the invention, and the invention is not limited to above embodiment, are implementingThe structural modification small there may be part in the process, if various changes or modifications of the invention are not departed from essence of the inventionMind and range, and belong within the scope of claim and equivalent technologies of the invention, then the present invention is also intended to encompass these changesAnd modification.