CN209841816U - a titration device - Google Patents

Abstract

The utility model relates to the technical field of machinery, specifically a titration outfit, including the glass pipe, glass intraductal wall surface is equipped with the glass doctor-bar, and the glass intraductal below is equipped with the tip burette. The utility model discloses a to tip burette and the split type design of glass pipe, when making the tip burette damage or carry out the condition handled to different liquid, the burette head is convenient for change. The utility model discloses a glass doctor-bar of setting and glass tube inner wall laminating when having the bubble on the glass tube wall, realizes cleaing away of bubble.

Description

a titration device

technical field

The utility model relates to the technical field of machinery, in particular to a titration device.

Background technique

A burette refers to a measuring vessel that holds a titrant solution in a titration operation. The burette is a glass tube with a slender, uniform inner diameter and a scale. There is a glass tip at the lower end of the tube, and it has different volumes such as 25ml and 50ml. The main part of the burette is made of a glass tube with uniform inner diameter and precise scale. The lower end is connected to a glass cock or a latex tube containing glass beads to control the outflow speed of the liquid, and a pointed glass tube is connected to the bottom end. A burette with a glass cock at the lower end is called an acid burette, and is often used to measure the volume of a non-strongly alkaline dilute solution dripped out. In the prior art, the glass tip at the bottom of the buret is easily corroded and damaged, and cannot be replaced. In addition, when the burette is poured into the liquid, some liquid will generate bubbles on the inner wall of the glass, which is difficult to remove. In view of this, we propose a titration device.

Utility model content

The purpose of this utility model is to provide a titration device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A titration device, comprising a glass tube, a glass scraper is provided on the inner surface of the glass tube, and a pointed dropper is provided below the glass tube;

A number of scale marks are printed on the outer wall of the glass tube;

The top of the glass scraper is provided with a hook, and the hook is movably connected to the top outer wall of the glass tube;

The inner wall of the bottom end of the glass tube is provided with an internal thread, the outer wall of the top end of the pointed dropper is provided with an external thread, and the internal thread is threaded with the external thread;

The outer walls on both sides of the bottom end of the pointed dropper are provided with fixing holes, and a cock is provided in the fixing hole, and the cock passes through the fixing hole and is connected to it in rotation, and a rotating rod is embedded at one end of the cock , there is an air hole at the center of the cock.

Preferably, the scale lines are arranged equidistantly along the vertical direction.

Preferably, the outer wall of the glass scraper is in close contact with the inner wall of the glass tube.

Preferably, the sum of the length of the glass scraper and the length of the external thread is equal to the length of the glass tube.

Preferably, the bottom end of the pointed dropper is conical.

Preferably, the outer wall of the cock is in close contact with the fixing hole.

Preferably, the air hole has a radius smaller than that of the cock.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model adopts the split design of the pointed dropper and the glass tube, so that when the pointed dropper is damaged or different liquids are processed, the dropper head is easy to replace.

2. The utility model realizes the removal of air bubbles when there are air bubbles on the glass tube wall by setting a glass scraper attached to the inner wall of the glass tube.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the enlarged schematic view of the structure of the A part in the utility model;

Fig. 3 is an exploded view of the overall structure of the utility model;

Fig. 4 is the enlarged schematic view of the structure of the B part in the utility model;

Fig. 5 is a sectional view of the overall structure in the utility model.

Fig. 6 is an enlarged schematic diagram of the structure of the C part of the utility model.

In the figure: 1. glass tube, 11. scale line, 12. internal thread, 2. pointed dropper, 21. cock, 22. fixing hole, 23. external thread, 211. rotary rod, 212. air hole, 3. Glass scraper, 31. hook.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operation, and therefore cannot be construed as a limitation of the utility model.

In the description of the present utility model, "several" means two or more, unless otherwise specifically defined.

Please refer to Figure 1-6, the utility model provides a technical solution:

A titration device, comprising a glass tube 1, a glass scraper 3 is provided on the inner wall surface of the glass tube 1, and a pointed dropper 2 is provided under the glass tube 1;

A number of scale lines 11 are printed on the outer wall of the glass tube 1; in addition, the scale lines 11 are arranged equidistantly along the vertical direction, so that the scale capacity in the glass tube is easy to read.

The top of the glass scraper 3 is provided with a hook 31, and the hook 31 is movably mounted on the top outer wall of the glass tube 1; in addition, the outer wall of the glass scraper 3 is closely attached to the inner wall of the glass tube 1, so that the glass scraper 3 can be on the glass. Air bubbles on the inner wall of tube 1 are removed. In addition, the sum of the length of the glass scraper 3 and the length of the external thread 23 is equal to the length of the glass tube 1, so as to increase the scraping area of the glass scraper 3 as much as possible.

The inner wall at the bottom of the glass tube 1 is provided with an internal thread 12, and the outer wall at the top of the pointed dropper 2 is provided with an external thread 23, and the internal thread 12 is threaded with the external thread 23; the above settings realize the connection between the glass tube 1 and the pointed dropper 2 , and make it easy to replace and disassemble. In addition, the bottom end of the pointed dropper 2 is conical, so as to realize the titration function of the pointed dropper 2 .

The outer wall on both sides of the bottom end of the tip dropper 2 is provided with a fixing hole 22, and a cock 21 is arranged in the fixing hole 22. The cock 21 passes through the fixing hole 22 and is connected to it in rotation. One end of the cock 21 is embedded with a rotary rod 211, the cock 21 An air hole 212 is opened at the center. The above arrangement realizes the titration control of the liquid in the tube through the cock 21 . In addition, the radius of the air hole 212 is smaller than the radius of the cock 21 ; in addition, the outer wall of the cock 21 is in close contact with the fixing hole 22 , the above arrangement realizes the sealing of the cock and prevents liquid from leaking out.

When the titration device of this embodiment is in use, first add a liquid reagent in the glass tube 1, and when bubbles appear on the inner wall of the glass tube 1, use the glass scraper 3 to rotate on the inner wall of the glass tube 1 to make the glass scraper 3 Scrape off the air bubbles; then rotate the rotary rod 211 to drive the cock 21 to rotate, so that the position of the air hole 212 is changed, and the liquid reagent drips through the air hole 212 along the conical pointed dropper 2, and the rotating rod 211 can control the Titration process with liquid reagents. After use, you can unscrew and take off the pointed dropper 2 for cleaning. When the pointed dropper 2 is damaged or different reagents are processed, the pointed dropper 2 can also be easily replaced.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only preferred examples of the utility model, and are not used to limit the utility model. Without departing from the utility model Under the premise of the spirit and scope, the utility model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (7)

1. A titration device, comprising a glass tube (1), characterized in that: the inner surface of the glass tube (1) is provided with a glass scraper (3), and the bottom of the glass tube (1) is provided with a pointed dropper (2); A number of scale marks (11) are printed on the outer wall of the glass tube (1); The top of the glass scraper (3) is provided with a hook (31), and the hook (31) is movably connected to the top outer wall of the glass tube (1); The inner wall of the bottom end of the glass tube (1) is provided with an internal thread (12), the outer wall of the top end of the pointed dropper (2) is provided with an external thread (23), and the internal thread (12) and the external thread ( 23) Thread fit; Both sides of the outer wall of the bottom end of the pointed dropper (2) are provided with fixing holes (22), and a cock (21) is arranged in the fixing hole (22), and the cock (21) passes through the fixing hole (22). The hole (22) is rotatably connected with it, a rotary rod (211) is embedded at one end of the cock (21), and an air hole (212) is opened at the center of the cock (21). 2. The titration device according to claim 1, characterized in that: said scale marks (11) are arranged equidistantly along the vertical direction. 3. The titration device according to claim 1, characterized in that: the outer wall of the glass scraper (3) is in close contact with the inner wall of the glass tube (1). 4. The titration device according to claim 1, characterized in that: the sum of the length of the glass scraper (3) and the length of the external thread (23) is equal to the length of the glass tube (1). 5. The titration device according to claim 1, characterized in that: the bottom end of the pointed dropper (2) is conical. 6. The titration device according to claim 1, characterized in that: the outer wall of the cock (21) is in close contact with the fixing hole (22). 7. The titration device according to claim 1, characterized in that: the radius of the air hole (212) is smaller than the radius of the cock (21).