CN207866778U - A kind of combined type buret of precision liquid feeding - Google Patents

A kind of combined type buret of precision liquid feeding Download PDF

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Publication number
CN207866778U
CN207866778U CN201721785490.6U CN201721785490U CN207866778U CN 207866778 U CN207866778 U CN 207866778U CN 201721785490 U CN201721785490 U CN 201721785490U CN 207866778 U CN207866778 U CN 207866778U
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CN
China
Prior art keywords
tube
liquid feeding
microtitration
titration
graded tube
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Expired - Fee Related
Application number
CN201721785490.6U
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Chinese (zh)
Inventor
徐静
陈丽华
李海玲
孙万虹
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Northwest Minzu University
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Northwest Minzu University
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Priority to CN201721785490.6U priority Critical patent/CN207866778U/en
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Publication of CN207866778U publication Critical patent/CN207866778U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of combined type burets of accurate liquid feeding, graded tube and microtitration graded tube are titrated including constant, the top of constant titration graded tube is inserted with liquid feeding ball, the lower part of constant titration graded tube is connected by connecting tube with the outlet of the lower end of microtitration graded tube, the connecting tube is equipped with charger, movable sleeve is connected to vernier graduation ruler on the microtitration graded tube, is equipped with the vernier graduation line of liquid level alignment index line and decile above.The utility model both can be used as macro-analysis and also be used as micro-analysis, both can be used as acid titration and also has been used as the titration of alkali formula, can extensive use;It is configured with vernier caliper structure, under the premise of normal reading, second and third position that titration is read can be made to become accurate reading from estimating reading, to improve the accuracy of reading;While to buret liquid feeding can coutroi velocity, ensure detection solution when in use as far as possible reduce add waste the case where.

Description

A kind of combined type buret of precision liquid feeding
Technical field
The utility model is related to a kind of chemical experimental instrument more particularly to a kind of combined type burets of accurate liquid feeding.
Background technology
Buret is common a kind of analytical instrument in chemical experiment.Commonly used constant drop in titrimetric experiment at present Fixed tube has two kinds of acid and alkali formula, and in addition there are a kind of microburets.The common buret poor selectivity in laboratory, Zhi Nengdan Pure is used as constant or micro-analysis.
Constant burette is simple in structure, but reagent consumption is big, and waste liquid discharging amount and cost recovery are also high, and is actually dividing It analyses in work, is frequently encountered the low sample of content, only consume the titrating solution of 3~5mL, will produce larger mistake with constant titration At this moment difference, the accuracy of impact analysis result just need to use microburet.Microburet is learned since it is expensive Slightly damage may result in scrapping for entire buret in raw operating process, substantially increase cost depletions.
Flow velocity, which is not easy to accurately control, when to buret liquid feeding has the case where adding waste, and liquid level, which returns to zero, after liquid feeding delays Time also results in fluid waste.
Minimum scale position can only be accurately read when burette reading, leaned on analysis personnel to look squarely completely between minimum scale line and seen It examines and carries out estimating reading.Therefore, it is easy to cause error in reading because of human factor, causes precision of analysis.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of precisions easy to operate, at low cost, accuracy of reading The combined type buret of liquid feeding.
To solve the above problems, the utility model provides a kind of combined type buret of accurate liquid feeding, including constant drop Determine graded tube and microtitration graded tube, the top of constant titration graded tube is inserted with liquid feeding ball, and upper part left side is equipped with and air The branch pipe directly communicated;Constant titration graded tube between liquid feeding ball and big gas branch pipe is equipped with knob piston;Constant titration is carved The lower part for spending pipe is connected by connecting tube with the outlet of the lower end of microtitration graded tube, and the connecting tube is equipped with charger, often The end of amount titration graded tube is equipped with titration sharp nozzle tube I;The right side of microtitration graded tube is through screw thread II by titrating cock II It is connected with titration sharp nozzle tube II;
The charger is internally provided with liquid feeding hose, and arc-shaped seat, the liquid feeding are fixed with below the liquid feeding hose The top of hose is equipped with threaded hole, and the internal whorl connection screw thread bar of threaded hole is fixedly connected with knob, spiral shell above threaded rod Dummy block is fixedly connected with below rasp bar, the charger front and rear sides are fixed with connecting interface respectively, described to connect Mouth is equipped with internal thread, and the connection tube end to connect with the connecting interface is equipped with internal thread;Liquid feeding hose is made of PVC material, Be capable of the corrosion of acid-resistance and alkaline solution, dummy block is made of rubber material, the position of dummy block, the position of liquid feeding hose and The position of arc-shaped seat is corresponding, can accurately align simultaneously coutroi velocity;
Movable sleeve is connected to vernier graduation ruler on the microtitration graded tube, and the vernier graduation ruler is that cartridge type can be by transparent Plastics are made, and are equipped with the vernier graduation line of liquid level alignment index line and decile above, and liquid level alignment index line is located at vernier graduation The graduation mark of 0 graduation position of line, the vernier graduation line is smaller than the graduation mark spacing of microtitration graded tube, passes through two Person's scale is aligned to measure the liquid capacity in microtitration graded tube;The spiral shell that the vernier graduation ruler passes through graduation mark behind Nail is fastened on microtitration graded tube.
Preferably, it is fixedly linked equipped with magnifying glass with vernier graduation ruler in front of the liquid level alignment index line, the amplification Peephole is equipped with before mirror.
Preferably, microtitration graded tube upper end connects rubber hose, and spheroidal glass marble, ball are set among rubber hose The size of shape glass marble is adapted with rubber hose internal diameter, and is more than microtitration graded tube upper port internal diameter, spheroidal glass Ball bottom surface is in close contact with buret upper port.
Preferably, the interior side pipe being interlinked to the outside, institute are equipped with at zero graduation line phase level on the side wall of microtitration graded tube Side pipe is stated to communicate with container, the zero graduation line of the side pipe and bore minimum point in tube body connection and scale is mutually horizontal.
Preferably, the microtitration graded tube is placed on the titration tube socket.
The utility model has the following advantages compared with prior art:
1, the left side of constant titration graded tube is equipped with the branch pipe directly communicated with air in the utility model, and it is empty to be easy to discharge Gas.
2, the utility model both can be used as macro-analysis and also be used as micro-analysis, both can be used as acid titration and also has been used as Alkali formula titrates, can extensive use.
3, the utility model is configured with vernier caliper structure, under the premise of normal reading, can make that titration reads second, Three become accurate reading from estimating reading, to improve the accuracy of reading.
4, while to buret liquid feeding can coutroi velocity, ensure detection solution when in use as far as possible reduce adds The case where waste.
5, titration volume is accurately controlled using spheroidal glass marble, titrates front and back holding spheroidal glass marble and titration Pipe upper port is in close contact, and is prevented liquid level in buret from error occurs, is ensured measurement accuracy, and not will produce bubble, can soda acid It is dual-purpose, it can be used as pipette, it is easy to use, reagent is saved, titration precision significantly improves.
6, the interior side pipe being interlinked to the outside, the side pipe are equipped with at zero graduation line phase level on the side wall of microtitration graded tube It is communicated with container, scale is made to be maintained at zero graduation line, saved the zeroing time, improve work efficiency, saved a large amount of mark Quasi- liquid.
Description of the drawings
Fig. 1 is the structural schematic diagram of the combined type buret of the accurate liquid feeding of the utility model embodiment.
Fig. 2 is the structural schematic diagram of the charger of the utility model embodiment.
Fig. 3 is the side view of the vernier graduation ruler of the utility model embodiment.
Fig. 4 is the front view of the vernier graduation ruler of the utility model embodiment.
Specific implementation mode
As shown in Figs 1-4, the utility model discloses a kind of combined type buret of accurate liquid feeding, which includes connecting The constant titration graded tube 4 being connected together and the microtitration graded tube 5 being located on the right side of constant titration graded tube 4.
The top of constant titration graded tube 4 is inserted with liquid feeding ball 1, and the branch pipe 3 directly communicated with air is equipped on the left of upper part; Constant titration graded tube 4 between liquid feeding ball 1 and big gas branch pipe 3 is equipped with knob piston 2;Constant titrates the lower part of graded tube 4 It is connected with the outlet of the lower end of microtitration graded tube 5 by connecting tube 17, the connecting tube 17 is equipped with charger 16, constant drop The end for determining graded tube 4 is equipped with titration sharp nozzle tube I 81;The right side of microtitration graded tube 5 is through screw thread II 92 by titrating cock II 72 are connected with titration sharp nozzle tube II 82.
The charger 16 is internally provided with liquid feeding hose 21, and the lower section of the liquid feeding hose 21 is fixed with arc-shaped seat 22, The top of the liquid feeding hose 21 be equipped with threaded hole 23, the internal whorl connection screw thread bar 24 of threaded hole 23, threaded rod 24 it is upper Side is fixedly connected with knob 25, and the lower section of threaded rod 24 is fixedly connected with dummy block 26,16 rear and front end of charger difference Equipped with connecting interface 27, the connecting interface 27 is equipped with internal thread, and 17 end of connecting tube to connect with the connecting interface 27 is set There is internal thread;Liquid feeding hose 21 is made of PVC material, is capable of the corrosion of acid-resistance and alkaline solution, dummy block 26 is by rubber material Material is made, and the position of the position of dummy block 26, the position of liquid feeding hose 21 and arc-shaped seat 22 is corresponding, can accurately align simultaneously Coutroi velocity.
When needing coutroi velocity, threaded rod 24 is rotated using knob 25 so that the rotation in threaded hole 23 of threaded rod 24, And dummy block 26 is driven to move up and down, then liquid feeding hose 3 is expressed to the surface of arc-shaped seat 4, gradually squeeze liquid feeding Hose 21 reduces flow velocity, the case where capable of avoiding adding waste, while the step of liquid feeding can be simplified.
Liquid feeding ball 1 is in hemispherical, and bottom is inclined-plane, and capacity is 25~30mL.And the opening of liquid feeding ball 1 is larger, it is convenient Titrating solution it is filling.
Constant titrates graded tube 4 and is connected by screw thread I 91 with titration cock 71.
Microtitration graded tube 5 is placed on titration tube socket 10.
Constant titration graded tube 4 is flexibly connected with knob piston 2.
Constant titrates graded tube 4 and microtitration graded tube 5 is made of glass material, and surface indicates measurement scale line.
Titration cock I 71 and titration cock II 72 are made of hard polytetrafluoroethylene material;Good corrosion resistance, chance water, Acid, alkali, salt will not chemically reactive, therefore the buret both can be used as acid titration also be used as alkali formula titration.
Titration sharp nozzle tube I 81 and titration sharp nozzle tube II 82 are made of plastic material, can be with according to different needs, being made big Small mating sharp nozzle tube.
Vernier graduation ruler 11 is socketed on the microtitration graded tube, the vernier graduation ruler 11 is that tubular can be by transparent Rigid plastics is made, and is equipped with liquid level alignment index line 15 above and vernier graduation line, the vernier graduation ruler are carried on the back by graduation mark Screw 14 afterwards is fastened on microtitration graded tube, and the graduation mark of the vernier graduation line is smaller than microtitration graded tube Graduation mark spacing, there are many precision of vernier graduation ruler, if by 9ml on microtitration graded tube etc. points 10 parts as trip The scale of scale, then the difference of the length represented by each scale on each scale and main scale on vernier scale is exactly 0.1 Ml, similarly, if by points 20 parts respectively etc. of 19ml, 49ml on main scale, 50 parts as 20 scales, 50 scales on vernier scale, The difference of length shown in each scale on each scale and main scale so on vernier scale is respectively just 0.05ml, 0.02ml. Therefore the measurement accuracy of vernier graduation ruler is up to 0.1ml, 0.05ml, 0.02ml.If the minimum scale of vernier graduation ruler represents 0.1ml, then the measurement accuracy of vernier graduation ruler is up to 0.01ml, 0.005ml, 0.002ml.
Liquid level alignment index line 15 on vernier graduation ruler 11 is aligned with liquid level, the minimum on microtitration graded tube 5 Graduation mark indicates the integer scale of liquid level, can be accurate to 0.1ml, if 50 lattice of vernier vernier graduation ruler are just equal to micro drop Determine the 4.9ml on graded tube, then vernier per compartment away from=4.9ml ÷ 50=0.098ml, on microtitration graded tube per compartment away from Per compartment away from=0.1-0.098=0.002 (ml), 0.002ml is differed it is the least count value of such vernier caliper with vernier. As the N lattice groove on vernier graduation ruler is aligned with groove on microtitration graded tube.Liquid level be aligned index line 15 apart from front most The liquid capacity that the distance of down scale represents is N × 0.002=0.002N (ml), and the two number is added as actual volume number.
More preferable for liquid level alignment index line and liquid level is aligned and observes scale value, before the vernier graduation ruler 11 Side is fixed with magnifying glass 12, and 12 front of the magnifying glass is equipped with peephole 13.
Buret upper end connects rubber hose 32, and spheroidal glass marble 31, spheroidal glass marble are set among rubber hose 32 31 size is adapted with 32 internal diameter of rubber hose, and is more than 5 upper port internal diameter of microtitration graded tube, spheroidal glass marble 31 bottom surfaces are in close contact with buret upper port;In use, liquid level can be made to drop to required scale by extruding glass marble 31, And continue to squeeze glass marble 31, start to be titrated to experiment and terminate, glass marble is pressed down against before and after titration, keeps glass marble and titration Pipe upper port is in close contact, and eliminates liquid level in buret and error occurs since glass marble titration front and back position is different, glass marble For spheroidal, ensureing to squeeze front and back glass marble, to account for titration pipe volume identical, improves reading accuracy;Since glass marble 31 is titrating 5 upper end of pipe, thus the utility model can soda acid it is dual-purpose, be alternatively arranged as pipette and pipette and use, and do not allow to be also easy to produce bubble, Even if generating bubble, it is relatively easy to be discharged;When rubber hose or glass marble when something goes wrong, be convenient for changing.
On the side wall of tube body 5 the interior side pipe 40 being interlinked to the outside, the side pipe 40 and container are equipped with at zero graduation line phase level 41 communicate, the side pipe 40 and the zero graduation line of bore minimum point in tube body connection and scale are mutually horizontal, and scale is made to keep It in zero graduation line, improves work efficiency, has saved a large amount of titer.
In use, titrating solution is poured into from the opening of liquid feeding ball 1, liquid enters constant titration graded tube 4, charger 16 can control and give microtitration graded tube 5 liquid feeding, and when needing coutroi velocity, the gradual liquid feeding hose 21 that squeezes reduces flow velocity, The case where capable of avoiding adding waste, while the step of liquid feeding can be simplified.Rotation titration cock I 71 or titration cock II 72 are adjusted Liquid level is saved to " 0 " scale, you can start titration operation, the flow of titration can be controlled by titrating cock I 71 or titrating cock II 72 And speed, the gas that constant titrates in graded tube 4 or microtitration graded tube 5 can be discharged by branch pipe 3.The utility model passes through The structure of similar vernier caliper accurately reads the liquid level on microtitration graded tube, passes through magnifying glass accurate observation liquid level The scale of position and the place of liquid level.
Finally it should be noted that:The above descriptions are merely preferred embodiments of the present invention, is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it still can be with technical scheme described in the above embodiments is modified, or to which part technical characteristic Carry out equivalent replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims (5)

1. a kind of combined type buret of precision liquid feeding, it is characterised in that:It is carved including constant titration graded tube (4) and microtitration Degree pipe (5);The top of constant titration graded tube (4) is inserted with liquid feeding ball (1), and the branch directly communicated with air is equipped on the left of upper part It manages (3);Constant titration graded tube (4) between liquid feeding ball (1) and big gas branch pipe (3) is equipped with knob piston (2);Constant titrates The lower part of graded tube (4) is connected by connecting tube (17) with the outlet of the lower end of microtitration graded tube (5), the connecting tube (17) It is equipped with charger (16), the end that constant titrates graded tube (4) is equipped with titration sharp nozzle tube I (81);Microtitration graded tube (5) Right side through screw thread II (92) by titrate cock II (72) be connected with titration sharp nozzle tube II (82);
The charger is internally provided with liquid feeding hose (21), and arc-shaped seat (22) is fixed with below the liquid feeding hose (21), The top of the liquid feeding hose (21) is equipped with threaded hole (23), the internal whorl connection screw thread bar (24) of threaded hole (23), screw thread It is fixedly connected with knob (25) above bar (24), dummy block (26), the liquid feeding are fixedly connected with below threaded rod (24) Device front and rear sides are fixed with connecting interface (27) respectively, and the connecting interface (27) is equipped with internal thread, with the connecting interface (27) the connection tube end to connect is equipped with internal thread;Liquid feeding hose (21) is made of PVC material, being capable of acid-resistance and alkaline solution Corrosion, dummy block (26) is made of rubber material, the position of dummy block (26), the position of liquid feeding hose (21) and arc-shaped seat (22) position is corresponding, can accurately align simultaneously coutroi velocity;
Movable sleeve is connected to vernier graduation ruler (11) on the microtitration graded tube (5), and the vernier graduation ruler (11) is cartridge type It can be made of clear hard plastics, be equipped with the vernier graduation line of liquid level alignment index line (15) and decile above, liquid level alignment refers to Timberline (15) is located at 0 graduation position of vernier graduation line, and the graduation mark of the vernier graduation line is smaller than microtitration scale The graduation mark spacing of pipe measures the liquid capacity in microtitration graded tube (5) by the alignment of the two scale;The vernier Graduated scale (11) is fastened on by the screw (14) of graduation mark behind on microtitration graded tube (5).
2. a kind of combined type buret of accurate liquid feeding as described in claim 1, it is characterised in that:The liquid level alignment instruction It is fixedly linked with vernier graduation ruler (11) in front of line (15) equipped with magnifying glass (12), peephole is equipped with before the magnifying glass (13)。
3. a kind of combined type buret of accurate liquid feeding as described in claim 1, it is characterised in that:Microtitration graded tube (5) upper end connection rubber hose (32), rubber hose (32) is intermediate to set spheroidal glass marble (31), spheroidal glass marble (31) Size is adapted with rubber hose (32) internal diameter, and is more than microtitration graded tube (5) upper port internal diameter, spheroidal glass marble (31) bottom surface is in close contact with buret upper port.
4. a kind of combined type buret of accurate liquid feeding as described in claim 1, it is characterised in that:Microtitration graded tube (5) the interior side pipe (40) being interlinked to the outside, the side pipe (40) and container (41) phase are equipped with at zero graduation line phase level on side wall Logical, the side pipe (40) and the zero graduation line of bore minimum point in tube body connection and scale are mutually horizontal.
5. a kind of combined type buret of accurate liquid feeding as described in claim 1, it is characterised in that:The microtitration scale Pipe (5) is placed on the titration tube socket (10).
CN201721785490.6U 2017-12-19 2017-12-19 A kind of combined type buret of precision liquid feeding Expired - Fee Related CN207866778U (en)

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CN201721785490.6U CN207866778U (en) 2017-12-19 2017-12-19 A kind of combined type buret of precision liquid feeding

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109781496A (en) * 2019-03-06 2019-05-21 四川泰锐石油化工有限公司 A kind of detection liquid device for formulating and drilling fluid comprehensive performance intelligent detection and analysis system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109781496A (en) * 2019-03-06 2019-05-21 四川泰锐石油化工有限公司 A kind of detection liquid device for formulating and drilling fluid comprehensive performance intelligent detection and analysis system

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180914

Termination date: 20201219

CF01 Termination of patent right due to non-payment of annual fee