CN201744362U

CN201744362U - Coarse-suction fine-dripping acid and alkali burette

Info

Publication number: CN201744362U
Application number: CN2009200092629U
Authority: CN
Inventors: 吴利玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-21
Filing date: 2009-03-21
Publication date: 2011-02-16
Anticipated expiration: 2019-03-21

Abstract

The utility model provides a coarse-suction fine-dripping acid and alkali burette, which solves the problems that a three-way valve of a leakproof and jamproof acid and alkali common piston-type burette is not easy to clean, the operation of dripping by pushing the injector piston is complex, the removed cap sleeve is easy to lose owning to excessively small size, and the like. The coarse-suction fine-dripping acid and alkali burette consists of a burette, an air suction pipe and a fine adjusting switch. The coarse-suction fine-dripping acid and alkali burette is characterized in that the burette is internally provided with a sand-grinding upper joint (3); a bifurcated pipe (9) with the radius of 0.1cm is arranged at the position about 3cm away from the upper hole; other parts are similar to a liquid moving pipe, with the measuring range of 50ml; the bifurcated pipe (9) is connected with the fine adjusting switch which is an infusion apparatus adjusting switch; a soft pipe (10) is permanently connected with the bifurcated pipe (9) of the burette (9) and the connecting part has good air-tightness; the air suction pipe consists of an external pipe (11), a piston disc (8) and a gear (6); the sand-grinding upper joint (3) is connected with the air suction pipe; and the air suction pipe has coarse diameter. The coarse-suction fine-dripping acid and alkali burette is easy to control and simple and convenient to operate; the whole device is low in cost and can be commonly used for acid and alkali and carry out multiple operations by one step; and the injector can be repeatedly utilized.

Description

The thick suction carefully dripped the acid base titration pipe

Technical field

The utility model belongs to the chemical apparatuses field, and it is a kind of chemical apparatuses that is used for acid base titration in particular.

Background technology

Present employed buret generally is divided into two kinds: a kind of is the acid buret that the lower end has glass piston, is used to hold oxidisability or acids solution, can not hold bases solution, in order to avoid glass piston is corroded; Another kind is that the lower end is connected with built-in bead, connects the acid buret of the rubber tube of tip glass tube down, is used to hold bases solution, can not hold oxidisability or acids solution, in order to avoid to the rubber tube corrosion, two kinds can not be shared.The leakproof of now having applied for is anti-blocking, the shared piston type buret of soda acid (patent No. ZL200620074340.X) has been though solved acid buret because of smearing the inconvenience that vaseline causes, base buret is because of the control inconvenience of bead, but its triple valve is easy cleaning not, come dropping liquid with slow pushing syringe piston, complicated operation, it is tired out that the operator easily feels, and from the inconvenience of triple valve liquid feeding, easily overflow with cap sleeve liquid the lower end, removes cap sleeve and easily lose because it is too little.

Summary of the invention

The purpose of this utility model is to overcome that leakproof is anti-blocking, the not easy cleaning and the complicated operation of the shared piston type buret of soda acid, has realized that also leakproof is anti-blocking, the significant advantage of the shared piston type buret of soda acid simultaneously, and can disposable multioperation.

Technical solution of the present utility model: constitute by buret, fine tuning switch and air intake duct. interface in the band frosted in the buret, and at the bifurcated pipe that a radius 0.1cm is arranged from about 3cm suitable for reading place, remainder is similar to pipette, and range is 50ml; The fine tuning switch is the transfusion device by-pass cock, and its flexible pipe links to each other for a long time with the bifurcated pipe of buret, and the connecting place air-tightness is good; Air intake duct is by outer tube, plunger disc and gear constitute, interface connects air intake duct in the frosted, air intake duct is thicker, middle and lower part and syringe outer tube are similar, seeming two small one and large one cylinders constitutes, the about 3cm of the radius of big column, high about 9cm, one frosted lower interface is arranged at the small column bottom, its size is for just with interface is airtight links to each other in the frosted, the top of outer tube is by the about 3cm of height, the cylindricality that the two ends on the arc surface that two radius differs link to each other and surround, the bosom of cylindricality has the hollow of a wide about 1cm to be regardless of, all the other are not divided into solid, i.e. two solids, have a fixing port and No. two fixing ports on two solids respectively, wherein the radius of the radius on the arc surface that connects with the outer tube middle and lower part and outer tube big column is the same, and the middle part on this arc surface has a height to be slightly less than the rectangular door of the wide about 1cm of 3cm, the upper, middle and lower portion of outer tube is an integral body, plunger disc is by tightly being formed by connecting for the hard face of band hard tooth rod with for General Purpose Rubber piston area two parts, the tooth of the tooth of gear and tooth rod is consistent, and the center of gear is No. three fixing ports, and fixed axis is by one, two, No. three fixing port is fixed in gear on the outer tube solid; During use, interface in the frosted of frosted lower interface and buret is linked to each other, keep airtight good.

Advantage of the present utility model: because utilization air pressure balance principle, the employing gear slides, drive sliding imbibition on the plunger disc, can probably control liquid absorption, slip fine tuning switch dropping liquid, be easy to control thin dropping liquid, make the equal contact liq not of other devices except that buret simultaneously, only with washing buret, simple to operation during cleaning, whole installation cost is cheap, also can realize simultaneously advantages such as leakproof is anti-blocking, soda acid is shared, and can disposable multioperation, air intake duct can reuse etc., and using value is very arranged.

Description of drawings

Be further elaborated below in conjunction with the drawings and specific embodiments.

(same section label unanimity among each figure)

Fig. 1 is an overall structure schematic diagram of the present utility model;

Fig. 2 is the schematic diagram of fine tuning switch in the utility model;

Fig. 3 is the floor map when air intake duct is looked squarely in the utility model;

Fig. 4 is an air intake duct schematic top plan view in the utility model;

Fig. 5 is an air intake duct internal structure schematic diagram in the utility model.

Among the figure: 1. the shorter end of transfusion device by-pass cock, the 2. higher-end of transfusion device by-pass cock, 3. interface in the frosted, 4. frosted lower interface, 5. drip, 6. gear, 7. tooth rod, 8. plunger disc, 9. bifurcated pipe, 10. flexible pipe, 11. outer tubes, 12. solids, 13. fixed axis, 14. a fixing port, 15. No. two fixing ports, 16. No. three fixing ports.

The specific embodiment

Referring to Fig. 1-Fig. 5, on the bifurcated pipe 9 of the buret that glass or acid and alkali-resistance plastics are made, fixedly connect the fine tuning switch, earlier the frosted lower interface 4 of air intake duct is connected to interface 3 in the frosted of buret when needing to use, make its close proximity, airtight good; Balladeur train 6 can make on the tooth rod 7 and move, move thereby drive on the plunger disc 8, carry out thick imbibition, the upper surface of balladeur train 6, tooth rod 7, plunger disc 8 is the hard durable material, fixed axis 13 is fixed in gear 6 on outer tube 11 solids 12 by fixing port 14, No. two fixing ports 15, No. three fixing ports 16, half of high about 3cm and the material of the outer tube that the is similar to air intake duct 11 usefulness ordinary syringe outer tubes that form a circle of high part, lightweight, durable, regulate the fine tuning switch and be used for thin dropping liquid, the pipe in the fine tuning switch is a flexible pipe 10.

Before use, earlier the fine tuning switch is transferred to the shorter end 1 of transfusion device by-pass cock, again the following frosted interface 3 of air intake duct is connected to the last frosted interface 4 of buret, then drip under the buret 5 is immersed titrating solution, balladeur train 6 makes on the tooth rod 7 and moves, move thereby drive on the plunger disc 8, utilize the imbibition of air pressure balance principle, liquid is drawn to more than the zero graduation a bit, regulate the fine tuning switch, slowly move zeroing to the higher-end 2 of transfusion device by-pass cock from the shorter end 1 of transfusion device by-pass cock, just transferred to zero and be about to fine tuning switch cunning in the shorter end 1 of transfusion device by-pass cock.During titration, the shorter end 1 of transfusion device by-pass cock is slowly moved to drop to the higher-end 2 of transfusion device by-pass cock to be become to drip when not becoming line, near to titration end-point the time, the fine tuning switch is slowly moved to the shorter end 1 of transfusion device by-pass cock by the higher-end 2 near the transfusion device by-pass cock, until shorter end 1 place that again the fine tuning switch is slided to the transfusion device by-pass cock to titration end-point.After finishing an operation, directly continue balladeur train 6 and repeat process, realize disposable multioperation.

Claims

1. thick a suction carefully dripped the acid base titration pipe, is made up of buret, air intake duct, fine tuning switch; It is characterized in that: interface (3) in the frosted in the titration pipe racks, and at the bifurcated pipe (9) that a radius 0.1cm is arranged from about 3cm suitable for reading place, remainder is similar to pipette, and range is 50ml; Bifurcated pipe (9) is connected with the fine tuning switch, and the fine tuning switch is the transfusion device by-pass cock, and its flexible pipe (10) links to each other for a long time with the bifurcated pipe (9) of buret, and the connecting place air-tightness is good; Air intake duct is made of outer tube (11), plunger disc (8) and gear (6), and interface in the frosted (3) connects air intake duct, and air intake duct is thicker.

2. carefully drip the acid base titration pipe by the described thick suction of claim 1, it is characterized in that: air intake duct makes on the tooth rod (7) by balladeur train (6) and moves, and moves thereby drive on the plunger disc (8).

3. carefully drip the acid base titration pipe by the described thick suction of claim 1, it is characterized in that: gear (6) is fixed in gear (6) on outer tube (11) solid (12) by a fixing port (14), No. two fixing ports (15) and No. three fixing ports (16) with fixed axis (13).

4. carefully drip the acid base titration pipe by the described thick suction of claim 1, it is characterized in that: the tooth of the tooth of gear (6) and tooth rod (7) is complementary.