CN206535565U

CN206535565U - A kind of pipette

Info

Publication number: CN206535565U
Application number: CN201720035075.2U
Authority: CN
Inventors: 郝和群; 张舰
Original assignee: West Anhui University
Current assignee: West Anhui University
Priority date: 2017-01-12
Filing date: 2017-01-12
Publication date: 2017-10-03
Anticipated expiration: 2027-01-12

Abstract

The utility model discloses a kind of pipette, belong to chemical experimental instrument technical field, including ear washing bulb, liquid relief tube body, glass tube, glass marble, the ear washing bulb lower end is sebific duct interface, the sebific duct interface is connected with glass tube, the glass tube is connected by side four-way sebific duct with liquid relief tube body, the side four-way sebific duct includes supervisor, upper branch pipe and lower branch line, the upper branch pipe, lower branch line and the appropriate department between upper branch pipe and lower branch line are equipped with glass marble, the glass marble and upper branch pipe, lower branch line and the appropriate department between upper branch pipe and lower branch line are interference fitted.

Description

A kind of pipette

Technical field

The utility model belongs to chemical experimental instrument technical field, and in particular to a kind of pipette.

Background technology

During chemical experiment, it is often necessary to accurately pipette a certain amount of reagent using pipette, use at present Pipette is typically made up of pipette and ear washing bulb two parts, and pipette and ear washing bulb are two devices separated, use liquid relief It is first that the tip alignment pipette of ear washing bulb is suitable for reading and be adjacent to when pipe measures solution, caused by extruding ear washing bulb in pipette Negative pressure, allows pipette to be extracted from reagent bottle after solution, draw solution, in addition it is also necessary to which the pipette that press...withes one's finger is suitable for reading, leads to Finger is crossed with pipette generation gap suitable for reading to adjust amount of solution, but often because of the manual connection of ear washing bulb and finger and pipette Unstable, it is unstable to cause to measure solution processes, operation inconvenience.

To solve the above problems, Authorization Notice No. discloses a kind of easy-operating for the U of CN 204672298 utility model Pipette, the pipette is made up of ear washing bulb, elastic three-way rubber pipe, glass tube, glass marble pipette, and ear washing bulb lower end is sebific duct Interface, sebific duct interface is connected with glass tube, and glass tube is connected by three-way rubber pipe with pipette, and three-way rubber pipe is by supervisor and branch pipe group Into equipped with horizontal glass marble at branch pipe, supervisor more than branch pipe position is built with longitudinal glass marble, in use, squeezing longitudinal glass Supervisor at ball position, makes to form space between supervisor and glass marble, and extruding ear washing bulb causes negative pressure in ear washing bulb, by pipette Stretch into reagent bottle below liquid level, squeeze again at longitudinal glass marble supervisor can imbibition, after the completion of imbibition, unclamp longitudinal glass Supervisor at ball, liquid level is adjusted by squeezing at horizontal glass marble branch pipe and follow-up tapping is carried out, the pipette passes through glue The valve mechanism that cooperatively forms of pipe and glass marble, improves the stability that pipette measures solution-operated, conveniently, simplifies pipette Operation, but above-mentioned pipette when using ear washing bulb can not remove carry out secondary extrusion, therefore it is required that used ear washing bulb Volume is not less than the liquid relief amount of pipette, causes the poor universality of ear washing bulb, is squeezed while must assure that when extruding ear washing bulb The gas flow gone out is not less than the amount of liquid for needing to pipette, and the process for extruding ear washing bulb is subjective random big, especially with rule During the larger pipette of lattice, more it is difficult to ensure that and disposable takes liquid success.

Utility model content

The purpose of this utility model is that ear washing bulb can repeatedly be extruded in use by providing one kind, and operates steady Determine, take the convenient pipette of liquid.

A kind of pipette of technical solutions of the utility model, including ear washing bulb, liquid relief tube body, glass tube, glass marble, it is described Ear washing bulb lower end is sebific duct interface, and the sebific duct interface is connected with glass tube, and the glass tube passes through side four-way sebific duct and liquid relief Tube body upper port is connected, and the side four-way sebific duct includes supervisor, upper branch pipe and lower branch line, the upper branch pipe, lower branch line and position Appropriate department between upper branch pipe and lower branch line is equipped with glass marble, and the glass marble is with upper branch pipe, lower branch line and positioned at upper branch pipe Appropriate department between lower branch line is interference fitted.

Preferably, a kind of pipette described in the utility model, the liquid relief tube body is provided with Anti-exudation apparatus, described Anti-exudation apparatus includes being arranged on the anti-overflow chamber expanded above liquid relief tube body graticule, and the anti-overflow intracavitary is provided with float valve, institute Anti-overflow chamber upper port is blocked when stating float valve positioned at peak, when float valve is located at minimum point, is existed between float valve and anti-overflow chamber lower port Gas-liquid channel.

Preferably, a kind of pipette described in the utility model, the upper end of the anti-overflow chamber is that circle closes up, lower end is ellipse Circle closing in, the float valve is spheroid, and the diameter of the float valve is more than circular closing in diameter, and between the long axial length of ellipse closing in Between degree and minor axis length.

Preferably, a kind of pipette described in the utility model, the float valve includes supporting plate, and the supporting plate is provided with hemisphere Shape plug, the diameter of the plug is more than the diameter of anti-overflow chamber upper port, the diameter of anti-overflow chamber lower port between plug diameter with Supporting plate diameter diameter, the position that supporting plate is located at plug periphery is provided with gas-liquid through hole.

Preferably, a kind of pipette described in the utility model, the float valve is made up of polytetrafluoroethylene (PTFE).

Pipette described in technical solutions of the utility model in use, due to first time extruding ear washing bulb caused by Negative pressure be not enough to draw enough liquid, it is necessary to carry out secondary imbibition, now keep supervisor between glass marble, lower branch line and glass Sealed between glass ball, make to form gap between upper branch pipe and glass marble by extruding, while extruding ear washing bulb, made again in ear washing bulb In negative pressure state, branch pipe is sealed with glass marble, make to form gap progress imbibition between supervisor and glass marble by extruding, When the liquid of absorption makes float valve rise in anti-overflow chamber peak, float valve blocks anti-overflow chamber upper end, and liquid is not rising, it is to avoid inhale Enter excess liq, edge etching four-way sebific duct and ear washing bulb, make to form gap between lower branch line and glass marble finally by extruding to adjust Whole amount of liquid, and carry out follow-up tapping.

The utility model technology beneficial effect：

The combination that technical solutions of the utility model pass through side four-way sebific duct and glass marble so that the pipette is using process In can cause negative pressure by repeatedly extruding ear washing bulb according to actual needs, to carry out multiple imbibition, it is ensured that imbibition success, the liquid relief Pipe is in combination, and the ear washing bulb of any specification can be supported the use with pipette, with higher versatility, Anti-exudation apparatus Setting avoids sucking the use longevity that excessive liquid flooding enters side four-way sebific duct and ear washing bulb, raising side four-way sebific duct and ear washing bulb Life.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model first embodiment,

Fig. 2 is the structural representation of the utility model second embodiment,

Fig. 3 is the structural representation of float valve in second embodiment,

Fig. 4 is Fig. 3 top view.

Embodiment

For ease of skilled artisan understands that technical solutions of the utility model, new to this practicality in conjunction with Figure of description Type technical scheme is described further.

A kind of pipette shown in as shown in Figure 1 and Fig. 2, including ear washing bulb 1, liquid relief tube body 2, glass tube 3, glass Ball, the lower end of ear washing bulb 1 is sebific duct interface, and the sebific duct interface is connected with glass tube 3, and the glass tube 3 is by by elasticity The side four-way sebific duct 4 that material is made is connected with the upper port of liquid relief tube body 2, and the side four-way sebific duct 4 includes supervisor 5, upper branch pipe 6 Glass marble is equipped with supervisor 5 with lower branch line 7, the upper branch pipe 6, lower branch line 7 and between upper branch pipe 6 and lower branch line 7, institute State and be interference fitted at glass marble and upper branch pipe 6, lower branch line 7 and supervisor 5 between upper branch pipe 6 and lower branch line 7.

The liquid relief tube body 2 is provided with Anti-exudation apparatus, and the Anti-exudation apparatus is marked including being arranged on liquid relief tube body 2 Provided with the float valve 9 being made up of polytetrafluoroethylene (PTFE), the float valve 9 in the anti-overflow chamber 8 expanded of the top of line 14, the anti-overflow chamber 8 The anti-overflow upper port of chamber 8 is blocked when peak, when float valve 9 is located at minimum point, there is gas-liquid between float valve 9 and the lower port of anti-overflow chamber 8 Passage.

Fig. 1 is a kind of first embodiment of pipette described in the utility model, in the embodiment, the anti-overflow chamber 8 it is upper End is that circle closes up, lower end is oval closing in, and the float valve 9 is spheroid, and the diameter of the float valve 9 is straight more than circular closing in Footpath, and between oval closing in long axis length and minor axis length.

Fig. 2 is a kind of second embodiment of pipette described in the utility model, and float valve 9 described in the embodiment includes support Plate 10, the supporting plate 10 is provided with hemispherical plug 11, and the diameter of the plug 11 is more than the diameter of the anti-overflow upper port of chamber 8, prevents The diameter for the lower port of chamber 8 of overflowing is between the diameter of supporting plate 10 and the diameter of plug 11, and supporting plate 10 is located at the position on the periphery of plug 11 Gas-liquid through hole 12 is installed.

Pipette described in the utility model is before use, ear washing bulb 1, glass tube 3 and upper branch pipe 6, lower branch line 7 and upper branch The side four-way sebific duct 4 that glass marble is equipped with supervisor 5 between pipe 6 and lower branch line 7 is connected, and is split knot with liquid relief tube body 2 Structure, the one end of the supervisor 5 of side four-way sebific duct 4 away from ear washing bulb 1 is combined, just can then pipette when using with liquid relief tube body 2 Liquid；No matter the specification of ear washing bulb 1 and liquid relief tube body 2, can be supported the use, in use, due to once squeezing When the negative pressure that pressure ear washing bulb 1 is caused is not enough to draw enough liquid, keep supervisor 5 to be sealed with glass marble, made by extruding Upper branch pipe 6 can just extrude ear washing bulb 1 again with formation gap at glass marble makes it re-form negative pressure, continues to draw liquid, And the setting of Anti-exudation apparatus avoids the liquid drawn excessive, overflow enters side four-way sebific duct 5 and ear washing bulb 1 causes to corrode and reduce Its service life.

Utility model is exemplarily described above in conjunction with accompanying drawing for technical solutions of the utility model, it is clear that this practicality New implement is not subject to the restrictions described above, as long as employing method design of the present utility model and technical scheme progress Various unsubstantialities improve, or it is not improved the design of utility model and technical scheme are directly applied into other occasions, Within protection domain of the present utility model.

Claims

1. a kind of pipette, including ear washing bulb, liquid relief tube body, glass tube, glass marble, the ear washing bulb lower end connects for sebific duct Mouthful, the sebific duct interface is connected with glass tube, it is characterised in that the glass tube passes through on side four-way sebific duct and liquid relief tube body Port is connected, and the side four-way sebific duct includes supervisor, upper branch pipe and lower branch line, the upper branch pipe, lower branch line and positioned at upper branch pipe Appropriate department between lower branch line is equipped with glass marble, and the glass marble is with upper branch pipe, lower branch line and positioned at upper branch pipe and lower branch line Between appropriate department be interference fitted.

2. a kind of pipette according to claim 1, it is characterised in that the liquid relief tube body is filled provided with seepage prevention Put, the Anti-exudation apparatus includes being arranged on the anti-overflow chamber expanded above liquid relief tube body graticule, and the anti-overflow intracavitary is provided with Float valve, the float valve blocks anti-overflow chamber upper port when being located at peak, when float valve is located at minimum point, float valve and anti-overflow chamber lower port Between there is gas-liquid channel.

3. a kind of pipette according to claim 2, it is characterised in that the upper end of the anti-overflow chamber for it is circular close up, under Hold and closed up for ellipse, the float valve is spheroid, and the diameter of the float valve is more than circular closing in diameter, and is closed up between ellipse Between long axis length and minor axis length.

4. a kind of pipette according to claim 2, it is characterised in that the float valve includes setting on supporting plate, the supporting plate There is hemispherical plug, the diameter of the plug is more than the diameter of anti-overflow chamber upper port, and the diameter of anti-overflow chamber lower port is between supporting plate Between diameter and plug diameter, the position that supporting plate is located at plug periphery is provided with gas-liquid through hole.

5. a kind of pipette according to claim any one of 2-4, it is characterised in that the float valve is by polytetrafluoroethylene (PTFE) system Into.