CN205749423U - A kind of acid buret - Google Patents
A kind of acid buret Download PDFInfo
- Publication number
- CN205749423U CN205749423U CN201620065979.5U CN201620065979U CN205749423U CN 205749423 U CN205749423 U CN 205749423U CN 201620065979 U CN201620065979 U CN 201620065979U CN 205749423 U CN205749423 U CN 205749423U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- cock
- piston
- screw thread
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A kind of acid buret, including titration graded tube (1), buffering ball (2), arm (3), piston (4), dropper (5) and titration cock (6), it is provided with cock set (7) in titration graded tube (1) bottom, wherein, dropper cock (6) includes piston rod (61), piston cap (62), piston rod (61) and piston cap (62) are wholely set, the direction being perpendicular to piston rod (61) is provided with through hole (63), it is provided with screw thread at the periphery of piston rod (61) periphery near end, and the distance between the upper pitch of thread through hole (63) arranged of piston rod (61) is more than through hole (63) diameter, correspondingly, cock set (7) is provided with screw thread.Acid buret of the present utility model can well prevent leakage, piston difficult drop-off, improves the accuracy of titration.
Description
Technical field
This utility model relates to the experiment equipment in a kind of biochemical test, in particular it relates to a kind of burette, more
In particular it relates to a kind of acid buret.
Background technology
Burette (burette) is divided into base buret and acid buret.The former is used for measuring and invades glass tubing
The liquid reagent of erosion effect；The latter is for measuring the liquid having corrosion function to rubber.Burette capacity is generally
50mL, each big lattice of scale are 1mL, and each big lattice are divided into again 10 little lattice, therefore each little lattice are 0.1mL.
Degree of accuracy is one of percentage.0.01ml can be accurate to.Burette is an elongated tubular container, one end
There is plug switch, it has graduation indication and measures.The general scale reading on top is less, by bottom
Reading is bigger.Burette is used to accurately release the volumetric apparatus of Uncertainty liquid.It is with elongated and uniform
Glass tubing is made, and it is Yi Jianzui that pipe has scale, lower end, and there is section door centre for controlling the speed of titration.
Generally, the lower end of acid buret is a glass piston, opens piston, and liquid i.e. oozes in pipe.Make
With front, first take off piston, with filter paper water blotted after cleaning or dry up, be then coated with one layer at two of piston very
Thin vaseline oil.Load onto piston and rotate, making piston and the transparent state in a plug slot contact position, the finally examination of dress water
Test whether leakage.The lower end of base buret rubber tube connects a cuvette with point mouth.Rubber tube
Built with a glass ball.With left hand thumb and forefinger lightly toward while rubber tube outside extruding glass bead,
Forming a gap in making pipe, liquid i.e. oozes from dropper.During extruding, the slightly upper of hands glass bead to be placed on.
During acid buret uses, when user titrates, the liquid in burette is generally from rotation
Piston go out to flow out, occur in that the phenomenon of leakage, impact measures the accuracy of structure.Although all scholars of traditional coating
Woods can reduce the degree of leakage, but or this problem can not be solved very well, and excessive smear vaseline
Cause rotary-piston to solidify, affect permanent use.It is open at Chinese patent, CN 204330711U to be disclosed
A kind of acid buret, including body (1), is provided with cock set (2) in the bottom of body (1),
Being provided with cock (3) in cock set (2), cock (3) includes cock body (4) and puts forth effort handle (5),
Being provided with external screw thread (6) outside the arrival end of described cock set (2), described cock (3) is provided with can
The nut (7) rotated, nut (7) is internally provided with the female thread (8) matched with external screw thread (6),
The handle (5) of putting forth effort of cock (3) makes end face and the spiral shell of cock body (4) through the through hole (9) of nut (7)
The intracavity bottom contact of cap (7).This utility model passes through the helicitic texture of nut (7) and cock set (2),
Cock is made to fit tightly cock set.Although the phenomenon of leakage reduces, need to be provided with spiral shell in cock set entrance outer end
Stricture of vagina, owing to the ratio of section is relatively thin, brings difficulty to processing, endurance quality that this structure uses it cannot be guaranteed that.
Utility model content
A purpose of the present utility model is to provide a kind of acid buret, and this acid buret is possible to prevent
There is the phenomenon of leakage in piston region.
Another purpose of the present utility model is to provide a kind of acid buret, and this burette reduces titration as far as possible
Liquid sticks in the miscellaneous part of burette, improves the accuracy of titration.
For realizing the purpose of this utility model, a kind of acid buret, including titration graded tube, buffering ball, props up
Pipe, piston, dropper and titration cock, be provided with cock set, wherein, dropper cock in titration graded tube bottom
It is wholely set including piston rod, piston cap, piston rod and piston cap, the direction be perpendicular to piston rod is provided with
Through hole, at the piston rod periphery near end at circumferencial direction screw thread, and the screw thread distance arranged on piston rod is logical
The length in hole is more than through-hole diameter, correspondingly, is provided with screw thread on cock set.
Acid buret of the present utility model can well prevent leakage, piston difficult drop-off, improves titration
Accuracy.
Accompanying drawing explanation
The structural representation of Fig. 1 burette of the present utility model；
The structural representation of Fig. 2 this utility model dropper cock；
The structural representation of the piston bush of Fig. 3 burette of the present invention.
Detailed description of the invention
With reference to accompanying drawing 1, a kind of acid buret of the present utility model, including titration graded tube 1, buffering ball 2,
Arm 3, piston 4, dropper 5 and titration cock 6, titration graded tube 1 bottom be provided with cock set 7, wherein,
Dropper cock 6 includes that piston rod 61, piston cap 62, piston rod 61 and piston cap 62 are wholely set, and is being perpendicular to
The direction of piston rod 61 is provided with through hole 63, is provided with screw thread at the periphery of piston rod 61 periphery near end,
And the length of the screw thread distance through hole 63 arranged on piston rod 61 is more than through hole 63 diameter, correspondingly, in cock
Set 7 is provided with screw thread.It is to say, be threaded the length of any one distance through hole 63 on piston rod 61
It is all higher than through-hole diameter.
It is that during using, volumetric solution adds through titration graded tube 1 top, after certain volume, closes titration and carve
The piston on degree pipe top, for the bubble discharged in titration graded tube 1 in liquid, opens the piston 4 on arm 3,
In whole titration process, piston 4 is open mode.
In this utility model, the shape of described piston rod 61 and cock set 7 is cylinder, cross section
For circle.
In some embodiments, at the periphery of piston rod 61 away from end periphery of piston cap 62
It is provided with screw thread, or, screw thread can be equipped with at the periphery of piston rod 61 near two end periphery.
Cock set 7 also cooperatively is provided with screw thread with the screw thread on piston rod 61.The setting of this screw thread to guarantee
Enough open through hole 63 smoothly so that liquid flows to dropper 5 from titration graded tube 1, also to guarantee meanwhile
Through hole 63 is rotated to the connection disconnecting titration graded tube 1 with dropper 5, unwanted time so that liquid
Can not flow in dropper 5.
In one embodiment, the periphery at piston rod 61 is provided with screw thread away from the periphery of piston cap 62,
It is corresponding with the screw thread on piston rod 61 that cock set 7 is provided with screw thread, on the axial direction of piston rod 61, in rotation
Screw thread on plug sleeve 7 distance of distance liquid outlet 71 at the end of liquid outlet 71 is through hole 63 diameter
1.7-2.5 again.This distance can ensure that and enables in the inflow dropper that liquid is much smoother, when unwanted
Time, disconnect the flowing of liquid.Tight condition, the wall that through hole overlaps just it is in cock with cock set in cock
Contact, is needing to release the use of liquid, progressively towards reversely rotating cock.
In another embodiment, the periphery at piston rod 61 is provided with screw thread away from the periphery of piston cap,
Under tight condition, through hole 63 contacts with the wall of cock set 7, and on the axial direction of piston rod 61, through hole 63
Distance cock overlap the through-hole diameter of a length of 0.5-1.0 times of 7 inlet.
In this utility model, between described through hole and the spacing of screw thread or through hole and inlet away from
From or screw thread and inlet between distance refer to, screw thread is nearest with through hole or inlet peripheral distance
Length, or the length that bore periphery is nearest with inlet peripheral distance.
Acid buret of the present utility model goes out to arrange specific threaded engagement at titration cock parts, is possible to prevent
In use the phenomenon of leakage occur from piston region, this burette reduces volumetric solution as far as possible and sticks in burette
Miscellaneous part, improve titration accuracy.
Claims (4)
1. an acid buret, including titration graded tube (1), buffering ball (2), arm (3), piston (4),
Dropper (5) and titration cock (6), be provided with cock set (7), wherein, dropper cock in titration graded tube (1) bottom
(6) include that piston rod (61), piston cap (62), piston rod (61) and piston cap (62) are wholely set, be perpendicular to
The direction of piston rod (61) is provided with through hole (63), is provided with at the periphery of piston rod (61) periphery near end
Distance between screw thread, and the upper pitch of thread through hole (63) arranged of piston rod (61) is more than through hole (63)
Diameter, correspondingly, is provided with screw thread on cock set (7).
Acid buret the most according to claim 1, it is characterised in that at the periphery of piston rod (61)
Periphery away from an end of piston cap (62) is provided with screw thread.
Acid buret the most according to claim 2, it is characterised in that at the periphery of piston rod (61)
Periphery away from piston cap (62) is provided with screw thread, is provided with on screw thread and piston rod (61) at cock set (7)
Screw thread corresponding, on the axial direction of cock set (7), the screw thread on cock set (7) near go out
Apart from 1.7-2.5 times that distance is through hole (63) diameter of liquid outlet (71) at the end of liquid mouth (71).
Acid buret the most according to claim 1, it is characterised in that at the periphery of piston rod (61)
Periphery away from piston cap (62) is provided with screw thread, under tight condition, and through hole (63) and the wall of cock set (7)
Contact, and on the axial direction of piston rod (61), distance cock set (7) inlet (71) of through hole (63) is long
Through hole (63) diameter that degree is 0.5-1.0 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620065979.5U CN205749423U (en) | 2016-01-22 | 2016-01-22 | A kind of acid buret |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620065979.5U CN205749423U (en) | 2016-01-22 | 2016-01-22 | A kind of acid buret |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749423U true CN205749423U (en) | 2016-11-30 |
Family
ID=57373459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620065979.5U Expired - Fee Related CN205749423U (en) | 2016-01-22 | 2016-01-22 | A kind of acid buret |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205749423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656010A (en) * | 2017-10-27 | 2018-02-02 | 张凌睿 | A kind of experiment dropper |
| CN111413459A (en) * | 2020-05-06 | 2020-07-14 | 江苏康正生物科技有限公司 | Reagent dropwise add device that mixing of colors experiments was used in food detection |
-
2016
- 2016-01-22 CN CN201620065979.5U patent/CN205749423U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656010A (en) * | 2017-10-27 | 2018-02-02 | 张凌睿 | A kind of experiment dropper |
| CN111413459A (en) * | 2020-05-06 | 2020-07-14 | 江苏康正生物科技有限公司 | Reagent dropwise add device that mixing of colors experiments was used in food detection |
| CN111413459B (en) * | 2020-05-06 | 2022-03-22 | 中农康正技术服务有限公司 | Reagent dropwise add device that mixing of colors experiments was used in food detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20170122 |