CN214225052U - Heatable titration device convenient for observing color change - Google Patents

Abstract

The utility model discloses a heatable titration device convenient for observing color change, which comprises a fixed frame, a burette and a heatable magnetic stirrer, wherein the fixed frame comprises a base and a support rod, a color development background flat plate is hinged on the base and can stay at any position above the base, an upper transverse fixing rod and a lower transverse fixing rod are arranged on the support rod, one end of each fixing rod is a sliding sleeve which is arranged on the support rod and can move up and down, a locking knob A is arranged on the sliding sleeve, the position of the sliding sleeve on the support rod can be adjusted through the locking knob A, and the other end of each fixing rod is a burette fixing clamp; the top of the burette is provided with a funnel-shaped liquid inlet, and the bottom of the burette is provided with a knob type control valve; the middle of the base is downwards concave to form a limiting groove used for placing the heatable magnetic stirrer, the surface of the stirring platform of the heatable magnetic stirrer is provided with at least one limiting ring, and the limiting ring is upwards convex to limit the conical flask placed on the stirring platform.

Description

Heatable titration device convenient for observing color change

Technical Field

The utility model relates to a chemistry experiment room device technical field, concretely relates to heatable titration outfit of convenient observation colour change.

Background

The traditional titration apparatus uses a glass burette fixed by an iron stand with a butterfly clamp to perform titration operation, and the butterfly clamp is too hard, so that the burette is not fixed well, the burette is easy to damage, the titration liquid is spilled, and the burette is easy to hurt people. Before titration, the titration solution is poured into the burette, and the burette has a small pipe opening, so that the titration solution is easy to spill out when being filled, and particularly, the titration solution with strong corrosivity can hurt people when being filled. When the titration is carried out, the relative heights of the burette and the conical flask are adjusted for a plurality of times to reach an optimal titration position, and then the titration is carried out. In titration process, because titration piston is not good to be controlled, big hour when titration speed appears easily, the easy weeping phenomenon of piston, and some titration operation's terminal point discolour unobviously, need take out the erlenmeyer flask, look for white wall and observe the colour change as the background color of titration, perhaps need heat before the titration terminal point reachs and judge the terminal point colour change, traditional titration apparatus has some defects, for making daily experimental analysis become convenient and fast more, need a neotype titration apparatus to satisfy daily titration work now.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, a heatable titration outfit that conveniently observes colour change is provided.

The utility model discloses a realize its purpose, the technical scheme of adoption is:

a heatable titration device convenient for observing color change comprises a fixing frame and a burette, wherein the fixing frame comprises a base, a supporting rod and a heatable magnetic stirrer, a color development background flat plate is hinged to the base and can be stopped and positioned at any position above the base, an upper transverse fixing rod and a lower transverse fixing rod are arranged on the supporting rod, one end of each fixing rod is a sliding sleeve, the sliding sleeve is sleeved on the supporting rod and can move up and down, a locking knob A is arranged on the sliding sleeve, the position of the sliding sleeve on the supporting rod can be adjusted through the locking knob A, and a burette fixing clamp is arranged at the other end of each fixing rod; the top of the burette is provided with a funnel-shaped liquid inlet, and the bottom of the burette is provided with a knob type control valve;

the middle of the base is downwards concave to form a limiting groove for placing the heatable magnetic stirrer, at least one limiting ring is arranged on the surface of a stirring platform of the heatable magnetic stirrer, and the limiting ring protrudes upwards to limit a conical flask placed on the stirring platform.

Preferably, the color development background flat plate is hinged to the base through a limiting hinge, the limiting hinge can be directly purchased on the market, the structure is simple, the installation is convenient, the operation is easy, and the color development background flat plate can stay at any position above the base under the action of external force.

Preferably, the burette fixation clamp is the annular retainer plate, be provided with locking knob B on the annular retainer plate, the mode of annular retainer plate is compared current butterfly clamp and is not fragile burette, can fix the burette of different models, thereby screws or loosens annular retainer plate through locking knob B and fixes or take out the burette.

Preferably, the developing background plate is white, so that the color change of the endpoint in the conical flask can be observed and judged more easily, and the titration is more accurate.

Preferably, the burette is made of PVC, is not easy to damage, and can be filled with acid, alkali, strong oxidizing or strong reducing titration solution.

Preferably, a plurality of concentric circles are drawn on the surface of the stirring platform and used for indicating the optimal positions for placing conical bottles with different sizes, so that the operation of an operator is facilitated, the conical bottles are placed at the center of the stirring platform according to the positions of the concentric circles, and the bottle openings of the conical bottles are conveniently aligned with the lower ends of the burettes.

The utility model has the advantages that: the burette is not easy to damage, the position of the burette with different models can be conveniently adjusted and fixed, the arrangement of the color development background flat plate avoids the trouble that the conical flask is taken down to look for a white background wall to observe the color change of the background before the titration is finished, and the conical flask is not required to be taken down to be heated and observed for the titration needing to heat and judge the color change of the endpoint before the titration endpoint arrives, so the operation is very convenient, the whole process can be carried out continuously, and the experimental time is also saved; the burette is provided with the funnel-shaped liquid inlet, so that liquid is conveniently added, and the corrosive liquid is prevented from leaking to cause pollution and damage to a human body during liquid adding. The utility model discloses rational in infrastructure, convenient operation, safe and reliable during the operation, not fragile instrument with cause the injury to the human body.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view showing the connection between the color developing background plate and the base in FIG. 1;

FIG. 3 is a schematic top view of a mixing platform of the heatable magnetic stirrer of FIG. 1;

the device comprises a fixing frame 1, a burette 2, a liquid inlet 2a, a knob type control valve 2B, a base 3, a limiting groove 3a, a supporting rod 4, a heatable magnetic stirrer 5a stirring platform 6, a color development background flat plate 7, a fixing rod 7a, a sliding sleeve 7B, a locking knob A, a burette fixing clamp 7c and a locking knob B, 8 limiting hinges 7d.

Detailed Description

The present invention will be further described with reference to the following examples, but the present invention is not limited thereto.

The experimental procedures in the following examples are conventional unless otherwise specified.

Example 1

A heatable titration apparatus convenient for observing color change, as shown in fig. 1-3, mainly comprising a fixing frame 1, a burette 2 and a heatable magnetic stirrer 5, wherein the fixing frame 1 comprises a base 3 and a support rod 4, the base 3 is hinged with a color development background flat plate 6, the color development background flat plate 6 can be stopped and positioned at any position on the base 3, the support rod 4 is provided with an upper transverse fixing rod 7 and a lower transverse fixing rod 7, one end of the fixing rod 7 is a sliding sleeve 7a, the sliding sleeve 7a is sleeved on the support rod 4 and can move up and down, the sliding sleeve 7a is provided with a locking knob A7 b, the position of the sliding sleeve 7a on the support rod 4 can be adjusted through the locking knob A7 b, and the other end of the fixing rod 7 is a burette fixing clamp 7c. The top of buret 2 is provided with infundibulate inlet 2a, makes things convenient for the liquid feeding not to leak outward, and the bottom is provided with knob formula control valve 2b, and knob formula control valve is more accurate for prior art's piston valve control, is difficult for appearing the weeping phenomenon. The middle of base 3 is the spacing recess 3a that is used for placing heatable magnetic stirrers 5 that forms downwards, can prescribe a limit to heatable magnetic stirrers 5's position, can let the erlenmeyer flask that magnetic stirrers placed aim at the buret better on the one hand, and on the other hand saves the space between magnetic stirrers and the buret. Heatable magnetic stirrers 5's stirring platform 5a surface is provided with spacing collar 5b, and spacing collar 5b makes progress the arch and plays limiting displacement to the erlenmeyer flask of placing on stirring platform 5a, prevents unexpected touching and lets the erlenmeyer flask drop from stirring platform and break into pieces.

In some preferred embodiments, the color-developing background plate 6 is hinged to the base 3 by a restraining hinge 8. Spacing hinge can directly purchase from the market, can be so that the dull and stereotyped 6 of colour development background erects perpendicularly at 90 degrees, also can stay motionless at other angles, erects the dull and stereotyped 6 of colour development background when dripping and conveniently observes the colour change in the erlenmeyer flask, fold the dull and stereotyped 6 of colour development background and put when not using and accomodate on base 3 or the desktop can.

In some preferred embodiments, the burette retainer clip 7c is an annular retainer ring with a locking knob B7 d disposed thereon. When the locking knob B is used, the burette is inserted into the annular fixing ring, and then the locking knob B is screwed to fix the position of the burette.

In some preferred embodiments, the chromogenic background plate 6 is white to facilitate observation of the color change upon the arrival of the titration endpoint in the Erlenmeyer flask.

In some preferred embodiments, the burette 2 is made of PVC, is not easily damaged, and can be filled with an acid, an alkali, a strong oxidizing or a strong reducing titration solution.

In some preferred embodiments, the surface of the mixing platform 5a is depicted with a plurality of concentric circles to indicate the location where different sizes of erlenmeyer flasks are placed.

Claims (6)

1. The utility model provides a heatable titration outfit that convenient observation colour changes, includes mount (1) and buret (2), mount (1) includes base (3) and bracing piece (4), its characterized in that: the device is characterized by further comprising a heatable magnetic stirrer (5), wherein a color development background plate (6) is hinged to the base (3), the color development background plate (6) can be stopped and positioned at any position above the base (3), an upper transverse fixing rod and a lower transverse fixing rod (7) are arranged on the supporting rod (4), one end of each fixing rod (7) is provided with a sliding sleeve (7a), the sliding sleeve (7a) is sleeved on the supporting rod (4) and can move up and down, a locking knob A (7b) is arranged on the sliding sleeve (7a), the position of the sliding sleeve (7a) on the supporting rod (4) can be adjusted through the locking knob A (7b), and the other end of each fixing rod (7) is provided with a burette fixing clamp (7 c); a funnel-shaped liquid inlet (2a) is formed in the top of the burette (2), and a knob type control valve (2b) is arranged at the bottom of the burette;

the middle of the base (3) is downwards concave to form a limiting groove (3a) for placing the heatable magnetic stirrer (5), a limiting ring (5b) is arranged on the surface of the stirring platform (5a) of the heatable magnetic stirrer (5), and the limiting ring (5b) upwards protrudes to limit the conical flask placed on the stirring platform (5 a).

2. A heatable titrating device to facilitate the observation of color changes as claimed in claim 1 wherein: the color development background flat plate (6) is hinged on the base (3) through a limiting hinge (8).

3. A heatable titrating device to facilitate the observation of color changes as claimed in claim 1 wherein: the burette fixing clamp (7c) is an annular fixing ring, and a locking knob B (7d) is arranged on the annular fixing ring.

4. A heatable titrating device to facilitate the observation of color changes as claimed in claim 1 wherein: the color development background plate (6) is white.

5. A heatable titrating device to facilitate the observation of color changes as claimed in claim 1 wherein: the burette (2) is made of PVC.

6. A heatable titrating device to facilitate the observation of color changes as claimed in claim 1 wherein: the surface of the stirring platform (5a) is drawn with a plurality of concentric circles for indicating the positions where the erlenmeyer flasks of different sizes are placed.

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