CN202741163U - Anti-pollution plastic cement sharp-nose transfer pipette - Google Patents

Abstract

The utility model relates to an anti-pollution plastic cement sharp-nose transfer pipette. A plastic cement sharp-nose is arranged below a flattop glass transfer pipette and is connected with the bottom of the flattop glass transfer pipette in sleeved mode. A small sleeve is installed on the bottom sharp-nose portion of the plastic cement sharp-nose in sleeved mode. The anti-pollution plastic cement sharp-nose transfer pipette not only has the advantages of being simple in structure, easy to change and install, and the anti-pollution plastic cement sharp-nose transfer pipette prevents the pollution of the plastic cement sharp-nose, but also the anti-pollution plastic cement sharp-nose transfer pipette has the advantages of being good in sealing of connecting parts, and accurate in volume of moving and taking.

Description

A kind of anti-pollution plastic cement point mouth pipette

Technical field

The utility model relates to a kind of anti-pollution plastic cement point mouth pipette, belongs to a kind of chemical experiment instrument.

Background technology

In chemical experiment, often need to pipette liquid, pipette is to pipette the requisite glass equipment of liquid.Present pipette all is that pure glass is made, and slightly not noting when pure glassware uses will be broken.Especially pipette, its sharp mouth portion, not only thin but also thin, if at the bottom of user's careless manipulation often can touch bottle and a bottle wall, so, very easily damaged.If the pipette of sharp mouth breakage is continued to use, can cause the volume that pipettes liquid inaccurate, if abandon can cause great waste again.In addition, pipette is when placing, and sharp mouth often can be met other article, easily causes sharp mouth to pollute.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of anti-pollution plastic cement point mouth pipette, and this anti-pollution plastic cement point mouth pipette is not only simple in structure, is easy to change, installs and prevents that sharp mouth pollutes, and the connecting portion good seal, and it is accurate to pipette volume.

For overcoming the above problems, concrete technical scheme of the present utility model is as follows: a kind of anti-pollution plastic cement point mouth pipette, below the tack glass pipet, be provided with the plastic cement point mouth that is enclosed within its bottom, and overlapping in the vertex (vertices) section of plastic cement point mouth has little cover.

Be provided with the parallel ring-type outer process in two ends below the tack glass pipet, be provided with the parallel groove of twice in the upper inner wall of plastic cement point mouth, the ring-type outer process is corresponding with the position of groove.

This anti-pollution plastic cement point mouth pipette adopts plastic cement point mouth, and it has good retractility, and sharp mouth is not fragile, and while sharp gonys section cover has the little cover of plastics, pollutes to prevent sharp mouth.

Be provided with two place's ring-type outer processes on the top of the nearly tack of tack glass pipet, north glue point mouth is provided with two place's ring-type sunken insides in same area.During installation, as long as allow the ring-type outer process of tack glass pipet just fall in the ring-type sunken inside of north glue point mouth, easy for installation.

Description of drawings

Fig. 1 is the structural representation of anti-pollution plastic cement point mouth pipette.

Fig. 2 is the partial enlarged drawing of Fig. 1.

The specific embodiment

As shown in Figure 1, a kind of anti-pollution plastic cement point mouth pipette is provided with the plastic cement point mouth 4 that is enclosed within its bottom below tack glass pipet 1, and overlapping in the vertex (vertices) section of plastic cement point mouth 4 has little cover 5.

As shown in Figure 2, be provided with the parallel ring-type outer process 2 in two ends below tack glass pipet 1, be provided with the parallel groove of twice 3 in the upper inner wall of plastic cement point mouth 4, ring-type outer process 2 is corresponding with the position of groove 3.

Tack glass pipet of the present utility model and north glue point mouth portion all should be determined concrete volume.General pipette volume commonly used has 50ml, 25 ml, 20 ml, 10 ml, 5 ml etc., if the volume of north glue point mouth is defined as 1 ml, so, the volume of tack glass pipet should be decided to be 49 ml, 24 ml, 19 ml, 9ml, 4 ml etc.Because the pipette volume of different model is different, the thickness of flat head section will be different, and therefore, the size of north glue point mouth will be complementary with tack pipette size.In order to guarantee that the pipette coupling part has good sealing, at first selected the north glue with good retractility to do sharp mouth at material, the simultaneously design by the ring-type sunken inside on the ring-type outer process on the tack glass pipet and the north glue point mouth, guarantee tack glass pipet and north glue point mouth portion in conjunction with tightr, it is more accurate to guarantee to pipette liquid volume with this.

Claims (2)

1. anti-pollution plastic cement point mouth pipette is characterized in that: be provided with the plastic cement point mouth (4) that is enclosed within its bottom in the below of tack glass pipet (1), at the vertex (vertices) section cover of plastic cement point mouth (4) little cover (5) arranged.

2. anti-pollution plastic cement point mouth pipette as claimed in claim 1, it is characterized in that: be provided with the parallel ring-type outer process (2) in two ends in the below of tack glass pipet (1), upper inner wall at plastic cement point mouth (4) is provided with the parallel groove of twice (3), and ring-type outer process (2) is corresponding with the position of groove (3).

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