CN219625447U

CN219625447U - Burette

Info

Publication number: CN219625447U
Application number: CN202320620041.5U
Authority: CN
Inventors: 权燕红; 丁欣欣; 张建胜; 黄伟
Original assignee: Shanxi Research Institute for Clean Energy of Tsinghua University
Current assignee: Shanxi Research Institute for Clean Energy of Tsinghua University
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-09-01
Anticipated expiration: 2033-03-27

Abstract

The utility model discloses a burette, and belongs to the technical field of chemical industry. The device comprises a first pipe body, a second pipe body, a first piston and a second piston; wherein: the first pipe body is arranged along a first direction; the first end of the second pipe body is connected with the first end of the first pipe body, and the second pipe body is communicated with the first pipe body; the second end of the first pipe body is provided with a first piston, and the second end of the second pipe body is provided with a second piston; the internal diameter of second body is less than the internal diameter of first body, has solved current buret flow great, and titration terminal point is difficult for controlling, leads to titration excessive or titration insufficient problem easily.

Description

Burette

Technical Field

The utility model relates to the technical field of chemical experimental instruments, in particular to a burette.

Background

Usually, when laboratory carries out analysis experiments, a buret needs to be used, and a traditional buret is mainly divided into an acid buret and a basic buret, and in the titration process, the acid buret and the basic buret cannot be mixed.

The acid buret is controlled by the cock to drip, and the cock is easy to leak, influences the accuracy of the measuring result, and wastes the titration solution. Although the degree of liquid leakage can be reduced by applying the Vaseline conventionally, the liquid leakage phenomenon is unavoidable. And because the through hole of the cock of the acid burette is larger, the flow of the burette is larger, when the burette is close to the titration end point, the control difficulty of dropwise adding and semi-dropwise adding is increased, the end point control is difficult to realize, and excessive titration or insufficient titration is easy to cause. The latex tube of traditional basic buret can be corroded or ageing often in the use, leads to latex tube and inside glass pearl contact space grow, takes place the weeping phenomenon.

Disclosure of Invention

The utility model aims at: the utility model provides a burette, which aims to solve the technical problems that the existing burette is large in flow, a titration end point is not easy to control, and excessive titration or insufficient titration is easy to cause.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a burette, comprising a first tube body, a second tube body, a first piston and a second piston; wherein:

the first pipe body is arranged along a first direction; the first end of the second pipe body is connected with the first end of the first pipe body, and the second pipe body is communicated with the first pipe body; the second end of the first pipe body is provided with a first piston, and the second end of the second pipe body is provided with a second piston; the inner diameter of the second pipe body is smaller than that of the first pipe body.

In some embodiments, the first piston and the second piston are both polytetrafluoroethylene.

In some embodiments, the first tube is provided with a first liquid outlet head having a first through hole along a first direction; the second pipe body is provided with a second liquid outlet head, and the second liquid outlet head is provided with a second through hole along the first direction.

In some embodiments, the aperture R1 of the first via is greater than the aperture R2 of the second via.

In some embodiments, the first liquid outlet head is provided with a first piston connecting sleeve, the first piston connecting sleeve is arranged along a second direction, and the first piston is matched with the first piston connecting sleeve; the second liquid outlet head is provided with a second piston connecting sleeve, the second piston connecting sleeve is arranged along a second direction, and the second piston is matched with the second piston connecting sleeve.

In some embodiments, the burette further comprises a first fluid receiving tray, a second fluid receiving tray, a first fluid receiving tube, and a second fluid receiving tube; wherein:

the second end of the first pipe body is connected with the first liquid receiving disc, an included angle formed by the first liquid receiving disc and the first pipe body is not equal to 90 degrees, and the first liquid receiving pipe is connected with the first liquid receiving disc; the second end of the second pipe body is connected with the second liquid receiving disc, an included angle formed by the second liquid receiving disc and the second pipe body is not equal to 90 degrees, and the second liquid receiving pipe is connected with the second liquid receiving disc.

In some embodiments, the first liquid receiving tray has a size greater than a size of the second liquid receiving tray, and the first liquid receiving tube has a size greater than a size of the second liquid receiving tube.

In some embodiments, a first side weir is provided along the periphery of the first liquid receiving pan, the first side weir having a first liquid outlet connected to the liquid receiving end of the first liquid receiving tube; a second side weir is arranged along the periphery of the second liquid receiving disc, the second side weir is provided with a second liquid outlet, and the second liquid outlet is connected with the liquid receiving end of the second liquid receiving pipe.

In some embodiments, the first liquid receiving pipe is provided with a first drain valve, and the second liquid receiving pipe is provided with a second drain valve.

In some embodiments, scale marks are arranged on the pipe walls of the first pipe body and the second pipe body.

The utility model has the following beneficial effects:

1. according to the utility model, the inner diameter of the first tube body is smaller than that of the second tube body, so that the solution flow rate of the second tube body is smaller than that of the first tube body, when the first tube body is used for titration, the second tube body is replaced for titration, and the flow rate of the second tube body is small, so that the outflow amount of the solution is convenient to control, the titration precision is improved, the success rate of experiments is improved, and the accuracy of experimental results is further improved.

2. In the utility model, the first piston and the second piston are made of polytetrafluoroethylene; can prevent alkaline solution from corroding the surface of the piston, the piston is adhered to the pipe body, and the piston is difficult to rotate. Therefore, the burette of the embodiment can be filled with an acidic solution or an alkaline solution, has the characteristic that one burette can be used for two purposes, and solves the problem that the acidic burette cannot be filled with the alkaline solution.

3. According to the burette, the liquid receiving disc and the liquid receiving tube are arranged on the liquid outlet head, so that the generated liquid leakage flows into the liquid receiving tube through the liquid receiving disc in the titration process, and the liquid leakage is collected. The actual consumption solution amount is the volume scale mark reduced amount of the first tube body minus the total leakage liquid amount collected by the first liquid receiving tube and the second liquid receiving tube, thereby achieving the purposes of saving solution, reducing titration cost and further improving titration accuracy.

Drawings

FIG. 1 is a schematic diagram of the front view of a burette provided by the present utility model;

FIG. 2 is a schematic view of the first piston and first bore of FIG. 1A according to the present utility model;

FIG. 3 is a schematic view of the structure of the second piston and the second through hole at B in FIG. 1 provided by the present utility model;

FIG. 4 is a schematic structural view of a first liquid receiving tray and a first liquid receiving pipe provided by the utility model;

FIG. 5 is a schematic structural view of a first liquid receiving pipe according to the present utility model;

reference numerals: 1-a first tube body; 2 a second tube body; 3-a first piston; 4-a second piston; 5, a first liquid outlet head; 6-a second liquid outlet head; 7-a first through hole; 8-a second through hole; 9-a first piston connecting sleeve; 10-a second piston connecting sleeve; 11-a first liquid receiving disc; 12-a second liquid receiving disc; 13 a first liquid receiving pipe; 14-a second liquid receiving pipe; 15-a first side weir; 16-a second side weir; 17-a first liquid outlet; 18 a second outlet; 19-a first tapping valve; 20-a second tapping valve; 21-graduation marks.

Detailed Description

The present utility model will be described in further detail in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The embodiment discloses a burette, as shown in fig. 1, which can comprise a first tube body 1, a second tube body 2, a first piston 3 and a second piston 4; wherein:

the first pipe body 1 is arranged along a first direction; the first end of the second pipe body 2 is connected with the first end of the first pipe body 1, and the second pipe body 2 is communicated with the first pipe body 1; the second end of the first pipe body 1 is provided with a first piston 3, and the second end of the second pipe body 2 is provided with a second piston 4; the inner diameter of the second tube body 2 is smaller than the inner diameter of the first tube body 1.

The operating principle of this embodiment is that the burette is an acid burette. The inner diameter of the second pipe body 2 is smaller than that of the first pipe body 1, the first end part of the second pipe body 2 is connected with the pipe wall of the first end of the first pipe body 1, and the first pipe body 1 and the second pipe body 2 are in a communicated state. The second end of the first pipe body 1 is connected with the first piston 3, the first piston 3 is positioned on the first pipe body 1 below the connection part of the second pipe body 2 and the first pipe body 1, and the first piston 3 is close to the liquid outlet end part of the first pipe body 1; the second end of the second pipe body 2 is connected with a second piston 4, and the second piston 4 is close to the liquid outlet end of the second functional body.

The first piston 3 is rotated, the second end outlet of the first tube body 1 is blocked by the first piston 3, the second end outlet of the second tube body 2 is blocked by the second piston 4, the solution enters the burette from the top end of the first tube body 1, and part of the solution in the first tube body 1 flows into the second tube body 2. When a titration experiment is carried out, firstly, the first piston 3 is slowly rotated, the first piston 3 is rotated along a first rotation direction, the solution in the tube of the first tube body 1 flows out, and when the titration end point is near, the first piston 3 is rotated along a second rotation direction, and the solution stops flowing out; secondly, the second piston 4 is slowly rotated, the second piston 4 rotates along the first rotation direction, the solution in the tube of the second tube body 2 flows out, and when the titration end point is reached, the second piston 4 rotates along the second rotation direction, and the solution stops flowing out.

In this embodiment, the inner diameter of the first tube body 1 is smaller than the inner diameter of the second tube body 2, so that the solution flow of the second tube body 2 is smaller than the solution flow of the first tube body 1, when the first tube body 1 titrates towards the end point, the second tube body 2 is replaced for titration, and the flow of the second tube body 2 is small, so that the amount of solution flowing out is convenient to control, the titration precision is increased, the success rate of experiments is improved, and the accuracy of experimental results is further improved.

In some embodiments, the liquid inlet end of the first tube body 1 has a horn-shaped opening structure, so that the solution is convenient to pour into the first tube body 1.

In some embodiments, the second pipe body 2 is in an L-shaped structure, the liquid inlet end of the second pipe body 2 is connected with the pipe wall of the first end of the first pipe body 1, and the liquid outlet end of the second pipe body 2 and the liquid outlet end of the first pipe body 1 are all arranged along the same direction, so that the reliability of the structure is improved.

In some embodiments, the first piston 3 and the second piston 4 each have a rotating handle, and the rotating handle of the first piston 3 is disposed opposite to the rotating handle of the second piston 4, so as to facilitate rotating the pistons.

Optionally, the materials of the first piston 3 and the second piston 4 include, but are not limited to, polytetrafluoroethylene materials.

In this embodiment, polytetrafluoroethylene has acid resistance and alkali resistance, and polytetrafluoroethylene is used as the material of the first piston 3 and the second piston 4; can prevent alkaline solution from corroding the surface of the piston, the piston is adhered to the pipe body, and the piston is difficult to rotate. Therefore, the burette of the embodiment can be filled with an acidic solution or an alkaline solution, has the characteristic that one burette can be used for two purposes, and solves the problem that the acidic burette cannot be filled with the alkaline solution.

Optionally, the first pipe body 1 is provided with a first liquid outlet head 5, the first liquid outlet head 5 having a first through hole 7 along a first direction; the second pipe body 2 is provided with a second liquid outlet head 6, the second liquid outlet head 6 having a second through hole 8 in the first direction.

In this embodiment, the flow rate of the solution is conveniently controlled, and the reliability of the structure is increased.

In some embodiments, as shown in fig. 1 and 3, the first liquid outlet head 5 is similar to a cone, the second liquid outlet head 6 is also similar to a cone, and the liquid outlet heads are large and small in top and bottom, so that the flow rate of the solution is further controlled.

Alternatively, the aperture R1 of the first through hole 7 is larger than the aperture R2 of the second through hole 8.

In this embodiment, when the first body 1 titration of being convenient for approaches the terminal point, change second body 2 titration, and the aperture of second body 2 is little, and then solution flow is little, and solution flow is easy to control, increases titration accuracy.

In some embodiments, r1=2r2, increasing the reliability of the structure, further increasing the titration accuracy, facilitates control of the half drop solution.

In some embodiments, the first piston 3 has a through hole with the same bore diameter as the first through hole 7, or the first piston 3 has a through hole with a larger bore diameter than the first through hole 7, or the first piston 3 has a through hole with a smaller bore diameter than the first through hole 7. The second piston 4 has a through hole having the same aperture as the second through hole 8, or the second piston 4 has a through hole having a larger aperture than the second through hole 8, or the second piston 4 has a through hole having a smaller aperture than the second through hole 8. The solution in the tube body tube is convenient to control to flow out.

Optionally, the first liquid outlet head 5 is provided with a first piston connecting sleeve 9, the first piston connecting sleeve 9 is arranged along the second direction, and the first piston 3 is matched with the first piston connecting sleeve 9; the second liquid outlet head 6 is provided with a second piston connecting sleeve 10, the second piston connecting sleeve 10 is arranged along the second direction, and the second piston 4 is matched with the second piston connecting sleeve 10.

In this embodiment, the first piston 3 is disposed through the first piston connecting sleeve 9, and the first piston 3 is matched with the first piston connecting sleeve 9 to control the flow of the solution in the first tube 1. The second piston 4 penetrates through the second piston connecting sleeve 10 to control the flow of the solution in the second pipe body 2.

In some embodiments, the first piston 3, the second piston 4, the first piston connecting sleeve 9 and the second piston connecting sleeve 10 are similar to a conical structure, and are large at one end and small at the other end; the large end of the first piston connecting sleeve 9 and the large end of the second piston connecting sleeve 10 are arranged in opposite directions, so that the piston can be further conveniently rotated.

Optionally, the burette further comprises a first liquid receiving disc 11, a second liquid receiving disc 12, a first liquid receiving tube 13 and a second liquid receiving tube 14; wherein:

the second end of the first pipe body 1 is connected with a first liquid receiving disc 11, an included angle formed by the first liquid receiving disc 11 and the first pipe body 1 is not equal to 90 degrees, and a first liquid receiving pipe 13 is connected with the first liquid receiving disc 11; the second end of the second pipe body 2 is connected with a second liquid receiving disc 12, an included angle formed by the second liquid receiving disc 12 and the second pipe body 2 is not equal to 90 degrees, a second liquid receiving pipe 14 is connected with the second liquid receiving disc 12, and liquid inlet ends of the first liquid receiving pipe 13 and the second liquid receiving pipe 14 are in an opening state; the first liquid receiving disc 11 is positioned below the first piston 3, and the second liquid receiving disc 12 is positioned below the second piston 4.

In this embodiment, when the solution is dropped, the solution may leak from the joint between the first piston 3 and the first tube 1, and the leaked solution will affect the titration result; the solution may leak out of the connection of the second piston 4 and the second tube 2, which will affect the titration result. Through the arrangement of the liquid receiving disc, the leaked solution flows to the liquid receiving disc along the outer wall of the tube body, and then flows into the liquid receiving tube along the end face of the liquid receiving disc, and the liquid receiving tube collects the leaked solution, so that the leaked solution is prevented from affecting the titration structure; the collected solution can be recycled, and the waste of resources is reduced. The contained angle that connects liquid dish and body to form is not equal to 90, and for the body, connect the liquid dish for the slope structure, connect liquid pipe and connect liquid dish bottommost to be connected, be convenient for connect the solution collection of liquid dish terminal surface to flow into and connect in the liquid pipe.

In some embodiments, the first liquid receiving disc 11 is sleeved on the first pipe body 1 to be adhered to form a fixed connection structure, and the second liquid receiving disc 12 is sleeved on the second pipe body 2; the second liquid receiving disc 12 is adhered with the second pipe body 2 to form a fixed connection structure. The stability of the structure is increased.

In some embodiments, the first liquid receiving plate 11 and the second liquid receiving plate 12 may be transparent, so as to facilitate observation of the reaction phenomenon of the indicator and the measured solution during the titration process.

In some embodiments, scale marks 21 are arranged on the pipe walls of the first liquid receiving pipe 13 and the second liquid receiving pipe 14, so that the leakage amount of the solution in the pipe of the first pipe body 1 can be conveniently observed, and the accuracy of calculating the titration result can be improved.

Optionally, the size of the first liquid receiving disc 11 is larger than that of the second liquid receiving disc 12, the size of the first liquid receiving tube 13 is larger than that of the second liquid receiving tube 14, and space is reasonably utilized so as to facilitate titration operation.

Optionally, a first side weir 15 is arranged along the periphery of the first liquid receiving disc 11, the first side weir 15 is provided with a first liquid outlet 17, and the first liquid outlet 17 is connected with the liquid receiving end of the first liquid receiving pipe 13; a second side weir 16 is provided along the periphery of the second receiving pan 12, the second side weir 16 having a second liquid outlet 18, the second liquid outlet 18 being connected to the liquid receiving end of the second liquid receiving tube 14.

In this embodiment, the first side weir 15 further facilitates the collection of the solution flowing into the first receiving pipe 13 at the first receiving pan 11. The provision of the second side weir 16 further facilitates the pooling of solution at the second receiving pan 12 into the second receiving tube 14. The arrangement of the first liquid outlet 17 ensures that the solution flows into the first liquid receiving pipe 13. The second outlet 18 is provided to ensure that the solution flows into the second receiving tube 14.

In some embodiments, the first outlet 17 has an edge weir and the second outlet 18 also has an edge weir to facilitate the pooling of solution into the receiving tube.

Optionally, the first liquid receiving pipe 13 is provided with a first drain valve 19, and the second liquid receiving pipe 14 is provided with a second drain valve 20.

In this embodiment, the solution in the first and second liquid receiving pipes 13 and 14 is easily discharged.

In some embodiments, the first drain valve 19 and the second drain valve 20 are made of polytetrafluoroethylene, and the first drain valve 19 and the second drain valve 20 have acid-resistant and alkali-resistant characteristics.

Optionally, scale marks 21 are arranged on the pipe walls of the first pipe body 1 and the second pipe body 2.

In this example, the consumption of the solution in the first tube 1 was easily observed.

In this embodiment, the amount of the actually consumed solution is the amount of the volume scale mark 21 of the first tube body 1 reduced minus the total amount of the leaked solutions collected by the first liquid receiving tube 5 and the second liquid receiving tube 11, so as to achieve the purposes of saving the solution, reducing the titration cost and improving the titration accuracy.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The burette is characterized by comprising a first pipe body, a second pipe body, a first piston and a second piston; wherein:

2. The burette of claim 1, wherein the first piston and the second piston are both polytetrafluoroethylene.

3. The burette of claim 1, wherein the first tube body is provided with a first outlet head having a first through-hole along a first direction; the second pipe body is provided with a second liquid outlet head, and the second liquid outlet head is provided with a second through hole along the first direction.

4. A burette as claimed in claim 3, wherein the aperture R1 of the first through-hole is larger than the aperture R2 of the second through-hole.

5. A burette as claimed in claim 3, wherein the first outlet head is provided with a first piston coupling sleeve, the first piston coupling sleeve being arranged in a second direction, the first piston being engaged with the first piston coupling sleeve; the second liquid outlet head is provided with a second piston connecting sleeve, the second piston connecting sleeve is arranged along a second direction, and the second piston is matched with the second piston connecting sleeve.

6. The burette of claim 1, wherein the burette further comprises a first fluid receiving tray, a second fluid receiving tray, a first fluid receiving tube, and a second fluid receiving tube; wherein:

7. The burette of claim 6, wherein the first fluid receiving tray has a size greater than a size of the second fluid receiving tray, and wherein the first fluid receiving tube has a size greater than a size of the second fluid receiving tube.

8. The burette of claim 6, wherein a first side weir is provided along the perimeter of the first fluid receiving tray, the first side weir having a first fluid outlet, the first fluid outlet being connected to the fluid receiving end of the first fluid receiving tube; a second side weir is arranged along the periphery of the second liquid receiving disc, the second side weir is provided with a second liquid outlet, and the second liquid outlet is connected with the liquid receiving end of the second liquid receiving pipe.

9. The burette of claim 6, wherein the first fluid receiving tube is provided with a first drain valve and the second fluid receiving tube is provided with a second drain valve.

10. The burette of claim 1, wherein the first tube body and the second tube body each have graduation marks disposed on a wall thereof.