CN219320210U - Glass buret with limiting piece - Google Patents

Abstract

The utility model discloses a glass burette with a limiting piece, which comprises a piston sleeve integrally arranged with a burette body, and a piston head rotatably arranged in the piston sleeve and matched with the piston sleeve, wherein one end of the piston head is provided with a handle contacted with a hand, and one end of the piston head far away from the handle is sleeved with the limiting piece for limiting the piston head and the piston sleeve to slide relatively. According to the utility model, on the premise of no need of processing the existing piston head and piston sleeve, the problem that the piston head slides out of the piston sleeve in the titration process can be prevented, and the risk of damage to skin caused by outflow of liquid in titration is avoided; the utility model is suitable for the titration analysis industry and is used for all scenes needing burets.

Description

Glass buret with limiting piece

Technical Field

The utility model relates to a burette, in particular to a glass burette with a limiting piece.

Background

Burets are the main measuring devices used in titration analysis methods, and are divided into acid burets and basic burets, and are used for filling acid or alkaline titration solutions respectively. The burette is glass material, and the lower extreme of sour burette is integrative to be provided with conical glass piston cover, and it has the hole that leads to the liquid to open on the glass piston cover, has placed the foraminiferous piston head in the piston cover, and piston head one end has the handle, and the piston head is the toper, and the diameter that is close to the handle end is greater than the diameter that keeps away from the handle end promptly. When in use, the piston head is rotated, and when the holes on the piston head are aligned with the holes on the piston sleeve, liquid flows out. Because the piston head is of a conical structure, in the titration process, after the piston head is rotated for a plurality of times to carry out liquid passing and liquid blocking, the phenomenon that the piston head slides out towards the handle end always occurs, so that liquid in the burette flows outwards, the experiment is failed, and acid is corrosive and can cause damage to the skin when flowing onto the skin.

The utility model patent with publication number of CN207351973U discloses an anti-skid deacidification alkali drip tube glass piston and a piston sleeve, wherein the piston sleeve is of a tubular structure, an opening is formed in the side wall of the piston sleeve, the piston body is a cylinder left after quarter of the cylinder is symmetrically cut off, and when the anti-skid deacidification alkali drip tube glass piston is used, the piston body passes through the opening of the piston sleeve along the arc surface and is further plugged into the piston sleeve, and liquid outlet is controlled by rotating the piston body; the piston body is provided with a piston head limiting body and a piston tail limiting body, so that the piston sleeve and the piston body are limited, and the piston body is prevented from sliding out of the piston sleeve.

But this structure needs to carry out cutting process to current piston sleeve, piston head, because both are glass material, and the processing is got up the degree of difficulty and is big, and is with high costs, wastes time and energy.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide the glass burette with the limiting piece, and the problem that the piston head slides out of the piston sleeve in the titration process can be avoided on the premise that the existing piston head and piston sleeve are not required to be processed.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a take glass buret of locating part, includes the piston sleeve that sets up with buret body an organic whole to and rotate the piston head that sets up in the piston sleeve, with piston sleeve looks adaptation, the one end of piston head is provided with the handle with the hand contact, has cup jointed the locating part that is used for restricting piston head and piston sleeve relative slip on the one end of keeping away from the handle on the piston head.

As a limitation of the present utility model: the limiting piece is a rubber ring, and the rubber ring is sleeved at the position where the piston head contacts with the edge of the piston sleeve.

As another definition of the utility model: the limiting piece is a rubber cap, the inner diameter of the rubber cap is matched with the outer diameter of the piston head, the length of the rubber cap is equal to the length of the piston head extending out of the piston sleeve, and the edge of the rubber cap abuts against the edge of the piston sleeve.

As another definition of the utility model: the limiting piece is a clamp, and a clamp is sleeved at the position where the piston head is contacted with the edge of the piston sleeve.

As another definition of the utility model: the limiting piece is rubber band, and the rubber band is wound at the contact position of the piston head and the edge of the piston sleeve.

By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

the utility model relates to an improvement on a piston head and a piston sleeve of a burette in the prior art, wherein a limiting piece for limiting the relative sliding of the piston head and the piston sleeve is sleeved at one end, far away from a handle, of the piston head, and after the piston head passes through the piston sleeve, the limiting piece is sleeved at the position, contacted with the edge of the piston sleeve, of the piston head, so that the piston head is prevented from sliding out of the piston sleeve in the titration process, and thus the titration result is not influenced.

In summary, the piston head and the piston sleeve can be prevented from sliding out of the piston sleeve in the titration process without processing the existing piston head and piston sleeve, so that the risk of damage to the skin due to outflow of liquid in the titration process is avoided; the utility model is suitable for the titration analysis industry and is used for all scenes needing burets.

Drawings

The utility model will be described in more detail below with reference to the accompanying drawings and specific examples.

FIG. 1 is a schematic structural diagram of embodiment 1 of the present utility model;

FIG. 2 is a schematic illustration of the piston sleeve and piston head portion;

FIG. 3 is a schematic structural diagram of embodiment 2 of the present utility model;

FIG. 4 is a schematic structural diagram of embodiment 3 of the present utility model;

fig. 5 is a schematic structural diagram of embodiment 4 of the present utility model.

In the figure: the burette comprises a 1-burette body, a 2-piston sleeve, a 3-piston head, a 4-handle, a 5-upper liquid port, a 6-lower liquid port, a 7-rubber ring, an 8-rubber cap, a 9-clamp and a 10-rubber band.

Detailed Description

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the glass burette with stopper described herein is a preferred embodiment and is provided only for the purpose of illustrating and explaining the present utility model and is not to be construed as limiting the utility model.

The terms or positional relationships of "upper", "lower", "left", "right" and the like in the embodiments are based on the positional relationships of fig. 1 in the drawings of the present specification, and are merely for convenience of describing the present utility model and simplifying the description, and are not intended to indicate or imply that the apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the protection of the present utility model.

Example 1 glass burette with stopper

As shown in fig. 1-2, the embodiment comprises a buret body 1 with a thick upper part and a thin lower part, a piston sleeve 2 integrally arranged with the buret body 1, and a piston head 3 which is rotationally arranged in the piston sleeve 2 and is matched with the piston sleeve 2, wherein one end of the piston head 3 is provided with a handle 4 which is contacted with a hand, one end of the piston head 3 far away from the handle 4 is sheathed with a limiting piece which is used for limiting the relative sliding of the piston head 3 and the piston sleeve 2, and the piston head 3 is prevented from sliding out of the piston sleeve 2 in the titration process, so that inaccurate titration results are caused.

Specifically, as shown in fig. 2, the piston sleeve 2 has a conical tube structure and is connected with the burette body 1 in a penetrating way, the interior of the piston sleeve 2 is communicated with the burette body 1, and an upper liquid through hole 5 and a lower liquid through hole 6 are respectively arranged at intersecting lines; the piston head 3 in this embodiment is made of glass, and the outer surface is frosted. The piston head 3 is also of a conical structure, one end with a large diameter is a thick end, one end with a small diameter is a thin end, a handle 4 is integrally arranged at the thick end, in the titration process, the handle 4 is pinched by hands to rotate the piston head 3, a through hole penetrating through the diameter of the piston head 3 is formed in the center of the piston head 3, the diameter of the through hole gradually decreases from top to bottom, namely the aperture of the upper end of the through hole is the largest, the diameter of the through hole is the same as that of the upper liquid through hole 5, the aperture of the lower end of the through hole is the smallest, the diameter of the through hole is the same as that of the lower liquid through hole 6, and when the titration device is used, the through hole of the piston head 3 is rotated to a position aligned with the upper liquid through hole 6 and the lower liquid through hole 6, and liquid can pass through the device.

Further, in this embodiment, the stopper is a rubber ring 7, the inner diameter of the rubber ring 7 is equal to the outer diameter of the piston head 3, when the piston head 3 passes through the piston sleeve 2, the rubber ring 7 is sleeved on the piston head 3 at a position contacting with the edge of the piston sleeve 2, and because the outer surface of the piston head 3 is a frosted surface and has a larger friction force with the rubber ring 7, the rubber ring 7 cannot shake left and right on the piston head 3 under the action of no external force, so that the piston head 3 cannot independently move left and right in the piston sleeve 2, the piston head 3 is prevented from sliding out from the piston sleeve 2 towards the end of the handle 4, and still can rotate in the piston sleeve 2, so as to realize the through flow or flow resistance of liquid.

When the piston head is used, vaseline is smeared at the contact position between the outer surface of the piston head 3 and the piston sleeve 2, so that the piston head 3 and the piston sleeve 2 can flexibly rotate and can be in a sealing state, the piston head 3 is inserted into the piston sleeve 2, the rubber ring 7 is sleeved on the piston head 3 from the thin end of the piston head 3 and moves to the contact position with the edge of the piston sleeve 2, and the piston head 3 is limited to autonomously move left and right in the piston sleeve 2.

Example 2 glass burette with stopper

The present embodiment is basically the same as embodiment 1 in structure, except that the stopper is a rubber cap 8; the other structures are identical to those of embodiment 1, and detailed description thereof is omitted in this embodiment.

As shown in fig. 3, in this embodiment, the inner diameter of the rubber cap 8 is adapted to the outer diameter of the piston head 3, and after the piston head 3 passes through the piston sleeve 2, the rubber cap 8 is sleeved on the end, far away from the handle 4, of the piston head 3, and at this time, the length of the rubber cap 8 is equal to the length of the thin end of the piston head 3 extending from the piston sleeve 2, that is, the edge of the rubber cap 8 abuts against the edge of the piston sleeve 2. Under the action of no external force, the piston head 3 does not move left and right independently in the piston sleeve 2, so that the piston head 3 is prevented from sliding out of the piston sleeve 2 towards the end of the handle 4, but can still rotate in the piston sleeve 2, and the through flow or the flow resistance of liquid can be realized.

The procedure for the use of this example is described in example 1.

Example 3 glass burette with stopper

As shown in fig. 4, this embodiment is basically the same as embodiment 1 in structure, except that the stopper is a clip 9; the other structures are identical to those of embodiment 1, and detailed description thereof is omitted in this embodiment.

In the use process of this embodiment, see embodiment 1, i.e. after the piston head 3 passes through the piston sleeve 2, the clip 9 is sleeved at the position where the thin end of the piston head 3 contacts the edge of the piston sleeve 2, so that the piston head 3 cannot independently move left and right in the piston sleeve 2 under the action of no external force, the piston head 3 is prevented from sliding out from the piston sleeve 2 towards the end of the handle 4, and still can rotate in the piston sleeve 2, so as to realize through flow or flow resistance of liquid.

Example 4 glass burette with stopper

As shown in fig. 5, the present embodiment has substantially the same structure as embodiment 1, except that the stopper is a rubber band 10; the other structures are identical to those of embodiment 1, and detailed description thereof is omitted in this embodiment.

In the use process of this embodiment, see embodiment 1, i.e. after the piston head 3 passes through the piston sleeve 2, the rubber band 10 is wound around the thin end of the piston head 3 at the position where the thin end contacts the edge of the piston sleeve 2, so that the piston head 3 cannot independently move left and right in the piston sleeve 2 without external force, and the piston head 3 is prevented from sliding out from the piston sleeve 2 towards the end of the handle 4, but still can rotate in the piston sleeve 2, so as to realize through flow or flow resistance of liquid.

It should be noted that the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but the present utility model is described in detail with reference to the foregoing embodiment, and it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (5)

1. The utility model provides a take glass buret of locating part, includes the piston sleeve that sets up with buret body an organic whole to and rotate the piston head that sets up in the piston sleeve, with piston sleeve looks adaptation, the one end of piston head is provided with the handle with hand contact, its characterized in that: one end of the piston head, which is far away from the handle, is sheathed with a limiting piece for limiting the piston head and the piston sleeve to slide relatively.

2. The glass burette with a stop member of claim 1, wherein: the limiting piece is a rubber ring, and the rubber ring is sleeved at the position where the piston head contacts with the edge of the piston sleeve.

3. The glass burette with a stop member of claim 1, wherein: the limiting piece is a rubber cap, the inner diameter of the rubber cap is matched with the outer diameter of the piston head, the length of the rubber cap is equal to the length of the piston head extending out of the piston sleeve, and the edge of the rubber cap abuts against the edge of the piston sleeve.

4. The glass burette with a stop member of claim 1, wherein: the limiting piece is a clamp, and a clamp is sleeved at the position where the piston head is contacted with the edge of the piston sleeve.

5. The glass burette with a stop member of claim 1, wherein: the limiting piece is rubber band, and the rubber band is wound at the contact position of the piston head and the edge of the piston sleeve.

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