A kind of Novel pipetteTechnical field
The utility model relates to instruments of inspection fields, and in particular to a kind of Novel pipette.
Background technique
Pipette is the measuring device for accurately pipetting the solution of certain volume, is that one kind measures formula instrument, is only used to measureThe volume of its released solution is common glass apparatus in biochemical test.Common pipette is a slender glass tube, lower endSharp mouth shape, pipe shaft have uniform scale.When using common pipette, pipette needs are used cooperatively with ear washing bulb, pass through extrudingEar washing bulb sucks solution in pipette, and the volume for sucking solution in pipette is related with the extruding degree of ear washing bulb, due to washingThe extruding degree of ear ball is difficult to accurately hold, and when the degree of extruding is excessive, the solution of sucking is possible to overflow pipette, causes portionSolution is divided to enter in ear washing bulb, when the degree of extruding is inadequate, the liquid level of solution is not reached requirement, it is necessary to re-operate, utilizeIt is also very inaccurate that ear washing bulb adjusts liquid level of solution in pipette.
Therefore it provides it is a kind of easy to use, and can accurately squeeze out the transfer pipette for chemical tests of quantitative solutionThe problem of being the utility model urgent need to resolve.
Utility model content
In order to solve the problems in the existing technology, the utility model provides a kind of Novel pipette, can accurately controlThe volume of inhalation solution processed solves the problems, such as assurance bad for liquor capacity in the prior art.
The utility model technical scheme applied to solve the technical problem is as follows:
A kind of Novel pipette, the pipette include: pipette body, pumping tube body, rubber plug, displacement sensor, vacuum pump,Sealing cover and controller；The pipette body and pumping tube body sealed set；All it is arranged on the pipette body and pumping tube bodyScale, and the scale value that the scale value on pipette body and pumping tube body accommodate corresponds；Rubber plug is equipped in exhaust tube body, andThe corresponding scale value in the upper surface of rubber plug is 0；The upper end of tube body is evacuated by seal cap sealing, position is arranged in the lower surface of sealing coverDisplacement sensor；The connection of the vacuum tube of the sealing cover and vacuum pump；The controller is connect with vacuum pump and displacement sensor.
The beneficial effects of the utility model are: pipette provided by the utility model passes through the glue being arranged in the tube bodyPlug and external vacuum pump pick and place the liquid quantitative in the tube body, by the range sensor and controller come accuratelyControl the moving distance of the rubber plug, the distance of the range sensor measurement be sealing cover lower surface to rubber plug upper surface away fromFrom testing crew can control the discharging amount of liquid, the utility model structure letter by controlling the moving distance of the rubber plugSingle, compact to design, easy to use, it is accurate to measure.It suitable for accurately the pipetting of experimental liquid, pipettes, has with the batch of class I liquid IThere is good application prospect.
Detailed description of the invention
A kind of structural schematic diagram of Novel pipette of Fig. 1 the utility model.
In figure: 1, pipette body, 2, pipette body scale, 3, pumping tube body, 4, pumping tube body scale, 5, sealing cover, 6,Vacuum pump, 7, controller, 8, vent valve, 9, rubber plug.
Specific embodiment
The utility model is described in further details with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of Novel pipette, which includes: pipette body 1, pumping tube body 3, sealing cover 5, trueSky pump 6, controller 7, displacement sensor and rubber plug 9；The pipette body 1 and pumping 3 sealed set of tube body, guarantee pipette bodyWhen 1 sucking liquid, enters the pipette body 1 without extraneous gas and be evacuated in tube body 3；It is arranged on the pipette body 1 and movesLiquid pipe body scale 2 is evacuated setting pumping tube body scale 4 on tube body 3, and represented by pipette body scale 2 and pumping tube body scale 4Bulking value correspond；It is evacuated in tube body 3 and is equipped with rubber plug 9, and the corresponding pumping tube body scale in upper surface of rubber plug 9 is 0, instituteThe maximum value that 9 upper surface of rubber plug corresponds to scale is stated, corresponding pipette body 1 sucks the maximum value of liquid；The rubber plug 9 and exhaust tubeBody 3 fits closely, the flowing of gas in partition pumping 3 upper and lower ends space of tube body；The upper end for being evacuated tube body 3 passes through sealing cover 5Displacement sensor is arranged in the lower surface of sealing, sealing cover 5；The sealing cover 5 is connect with the vacuum tube of vacuum pump 6；The controlDevice 7 and vacuum pump 6 and displacement sensor are wirelessly connected.Vent valve 8 is equipped on the pumping tube body 3 of 9 lower end of rubber plug.In the shiftingThe top of liquid pipe body 1 is plugged with cotton-wool.The pipette body 1 is flexibly connected with pumping tube body 3.
When using a kind of Novel pipette, the pipette body 1 is fixed and is sealed with pumping tube body 3 first,Displacement sensor, vacuum pump 6 and controller 7 are opened, on controller 7 after the volume of setting plan sucking liquid, controls vacuumPump 6 is opened；Vacuum pump 6 draws the air in pumping tube body 3, and rubber plug 9 moves up therewith, and pipette body 1 gradually sucks liquid,Distance of 9 upper surface of displacement sensor rubber plug apart from sealing cover 5 is simultaneously sent to controller 7, when 9 upper surface of rubber plug and sealingWhen the distance value of lid 5 corresponds to the volume of the plan sucking liquid of pipette body 1, controller 7 sends signal, control to displacement sensorDevice 7 controls vacuum pump 6 and stops working, and takes the body of air in the corresponding pumping tube body 3 of the sucking liquid volume in pipette body 1 awayProduct；Pipette completes the process of sucking liquid；When liquid suck it is too fast, be more than 1 volume of pipette body when, pushed up by pipette body 1The cotton-wool at end absorbs extra liquid.When needing sucking liquid to be put into test tube or other containers, pumping tube body 3 is openedOn vent valve 8, after liquid receives atmospheric pressure, into test tube or container, complete whole processes of liquid relief.