CN201166653Y

CN201166653Y - Accurate minim base buret

Info

Publication number: CN201166653Y
Application number: CNU200820008349XU
Authority: CN
Inventors: 王晨; 汤道权; 吴云明; 高媛; 郑明累
Original assignee: Xuzhou Medical College
Current assignee: Xuzhou Medical College
Priority date: 2008-03-12
Filing date: 2008-03-12
Publication date: 2008-12-17
Anticipated expiration: 2018-03-12

Abstract

The utility model relates to a precise micro-base buret for accurately and rapidly testing the volume of volumetric solution, which mainly comprises a capillary graded tube (1), a feeding funnel (2), a fluid-delivery valve (6), a titration valve (9), a beam section (10) and a PVC capillary tip mouth (11), since the fluid-delivery valve (6) and the titration valve (9) adopt the design mode which is corresponding with the human physiology structure, which overcomes the defect of the prior art that the operation time is long, so that tire easily occurs, the design of a half-drip knob (17) effectively overcomes the phenomenon of dipping more when approaching the end point of titration, the precise micro-base buret is mainly applied to be used for accurately testing a little liquid in laboratories and control laboratories of universities, scientific researches, medical and industrial and mining establishments and units.

Description

Accurate micro-base buret

Technical field

The utility model belongs to a kind of accurate micro-base buret of measuring the volumetric soiutions volume accurately, fast, and use the accurate mensuration of small amount of liquid in the laboratory and the laboratory that are mainly used in universities and colleges, scientific research, medicine and industrial and mining enterprise unit.

Background technology

At present, classical jumbo base buret for the precision and the accuracy that can keep measuring, is still being used in universities and colleges and industrial and mining enterprises laboratory and laboratory in volumetry is measured.The instrument of this classics is not only wasted chemical reagent, and very easily causes the operation fatigue of finger.Chinese patent 00230756.1 discloses a kind of micro type buret, from the instructions of this application file and claims, can learn, this micro-titration is by the design of the general piston of soda acid, solve base buret and operated fatigable problem, and the design by micro-water dropper, guaranteed the precision of titration, but this design and universities and colleges' current teaching materials there are discrepancy to the requirement of volumetric apparatus, and adopt from the design of kapillary upper end liquid feeding, make operation easier very big.The automatic liquid feeding buret of the disclosed trace of Chinese patent 200520083270.X, solved the problem of microburette liquid feeding difficulty preferably, but the automatic liquid feeding buret of the disclosed trace of Chinese patent 200520083270.X, solved the problem of microburette liquid feeding difficulty preferably, but, precision and accuracy that microburette is measured have directly been influenced owing to do not consider the diameter issue of fluid port.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, provides a kind of and can save chemical reagent in a large number, and measure precision and accuracy height, easy to operate accurate micro-base buret again.The technical scheme that its technical matters that solves the utility model adopts is: accurate micro-base buret is mainly held (15), upper recess surface (16) and half knob (17) and is formed by capillary graduated tube (1), addition funnel (2), filler neck (3), fixed leg (4), infusion tube (5), fluid-delivery valve (6), Y interface (7), titration flexible pipe (8), titration valve (9), Shu Jie (10), PVC capillary point mouth (11), concave surface (12), stage clip (13), the edge of a knife (14), cutter; It is characterized in that: capillary graduated tube (1) upper end links to each other with the coboundary of addition funnel (2), and the outer, lower end of filler neck (3) links to each other with the right-hand member of fixed leg (4), and the left end of fixed leg (4) links to each other with capillary graduated tube (1) lower end; The lower port of filler neck (3) and infusion tube (5) socket, infusion tube (5) holds between (15) from the edge of a knife (14) of fluid-delivery valve (6) and cutter and passes, fluid-delivery valve (6) is clamped in the middle part of infusion tube (5), and the lower end of infusion tube (5) is socketed on the Y interface (7); A titration flexible pipe of the lower port socket of capillary graduated tube (1) (8), titration flexible pipe (8) holds between (15) from the edge of a knife (14) of titration valve (9) and cutter and passes, titration valve (9) is clamped in the middle part of infusion tube (8), the lower end of titration flexible pipe (8) and Shu Jie (10) join, a PVC capillary point of Shu Jie (10) lower end socket mouth (11).

In conjunction with above summary of the invention as can be seen, the utility model has following advantage compared to existing technology: one, Shu Jie (10) is that a kind of internal diameter suitable for reading and capillary graduated tube (1) internal diameter are in full accord, and lower port diameter and the consistent glass tube of PVC capillary point mouth (11) upper port internal diameter, this design has solved the prior art problem of generation bubble in Shu Jie (10) easily well, also solves the problem with PVC capillary point mouth (11) interface kit simultaneously well.Two, PVC capillary point mouth (11) can be controlled at 0.0032～0.0036mL with the volume that flows out every drop of liquid, and this design is compared with every drop of liquid volume 0.05～0.02mL of existing technology, has guaranteed the degree of accuracy of measuring.Three, fluid-delivery valve (6) and titration valve (9) adopt and meet Human physiology structure Design mode, are suitable for long titration operation, have overcome prior art and have easily caused tired shortcoming because of the running time is long.Four, titration valve (9) has designed half knob (17), makes solution near titration end-point the time, is merely able to half, half ooze, and has overcome the phenomenon of overtitration very effectively.

Description of drawings

Fig. 1 is the front view (FV) of accurate micro-base buret.

Fig. 2 is the profile of accurate micro-base buret titration valve (9).

Each label declaration is as follows among Fig. 1,2:

The capillary graduated tube, 2. addition funnel, 3. filler neck, 4. fixed leg, 5. infusion tube, 6. fluid-delivery valve, 7.Y interface, 8. the titration flexible pipe, 9. the titration valve, 10. bundle joint, 11.PVC capillary point mouth, 12. concave surfaces, 13. stage clips, 14. edges of a knife, 15. cuttves hold, 16. upper recess surface, 17. half knobs.

Embodiment

Among Fig. 1, the outer edge of addition funnel (2) is welded on capillary graduated tube (1) zeromark line with the upper part, and make both parallel connections, filler neck (3) lower end by being weldingly connected, and makes capillary graduated tube (1) and filler neck (3) be parastate near the right-hand member of bell mouth place and fixed leg (4); Fixed leg (4) left end and capillary graduated tube (1) scale mark lower end do not have metering and indicate welding; Filler neck (3) lower port socket infusion tube (5), infusion tube (5) holds between (15) from the edge of a knife (14) of fluid-delivery valve (6) and cutter and passes, fluid-delivery valve (6) is clamped in the middle part of infusion tube (5), and the other end of infusion tube (5) is socketed on the Y interface (7); Capillary graduated tube (a 1) titration flexible pipe of lower port socket (8), titration flexible pipe (8) holds between (15) from the edge of a knife (14) of titration valve (9) and cutter and passes, titration valve (9) is clamped in the middle part of infusion tube (8), the lower end of titration flexible pipe (8) and Shu Jie (10) socket, Shu Jie (10) is that a kind of internal diameter suitable for reading and capillary graduated tube (1) internal diameter are in full accord, and lower port diameter and the consistent glass tube of PVC capillary point mouth (11) upper port internal diameter, a PVC capillary point of Shu Jie (10) lower end socket mouth (11).

Among Fig. 2, titration valve (9) concave surface (12) inwall is fixed with stage clip (13), stage clip (13) upper end presses closer under the edge of a knife (14), it is a titration flexible pipe (8) that the edge of a knife (14) and cutter hold interspersed between (15), upper recess surface (16) and cutter hold (15) and link together by two pillars, and one and half knobs (17) have been fixed in titration valve (9) lower right side.

Claims

1. the micro-base buret of precision is mainly held (15), upper recess surface (16) and half knob (17) and is formed by capillary graduated tube (1), addition funnel (2), filler neck (3), fixed leg (4), infusion tube (5), fluid-delivery valve (6), Y interface (7), titration flexible pipe (8), titration valve (9), Shu Jie (10), PVC capillary point mouth (11), concave surface (12), stage clip (13), the edge of a knife (14), cutter; It is characterized in that: capillary graduated tube (1) upper end links to each other with the coboundary of addition funnel (2), and the outer, lower end of filler neck (3) links to each other with the right-hand member of fixed leg (4), and the left end of fixed leg (4) links to each other with capillary graduated tube (1) lower end; The lower port of filler neck (3) and infusion tube (5) socket, infusion tube (5) holds between (15) from the edge of a knife (14) of fluid-delivery valve (6) and cutter and passes, fluid-delivery valve (6) is clamped in the middle part of infusion tube (5), and the lower end of infusion tube (5) is socketed on the Y interface (7); A titration flexible pipe of the lower port socket of capillary graduated tube (1) (8), titration flexible pipe (8) holds between (15) from the edge of a knife (14) of titration valve (9) and cutter and passes, titration valve (9) is clamped in the middle part of infusion tube (8), the lower end of titration flexible pipe (8) and Shu Jie (10) join, a PVC capillary point of Shu Jie (10) lower end socket mouth (11).

2. the micro-base buret of precision according to claim 1 is characterized in that: outer edge welding capillary graduated tube (1) the zeromark line upper part of funnel (2), and make both parallel connections.

3. the micro-base buret of precision according to claim 1 is characterized in that: Shu Jie (10) is that a kind of internal diameter suitable for reading and capillary graduated tube (1) internal diameter are in full accord, and lower port diameter and the consistent glass tube of PVC capillary point mouth (11) upper port internal diameter.

4. the micro-base buret of precision according to claim 1, it is characterized in that: titration valve (9) concave surface (12) inwall is fixed with stage clip (13), stage clip (13) upper end presses closer under the edge of a knife (14), and it is a titration flexible pipe (8) that the edge of a knife (14) and cutter hold interspersed between (15).

5. the micro-base buret of precision according to claim 1 is characterized in that: one and half knobs (17) have been fixed in titration valve (9) lower right side.