CN219625445U - Automatic zeroing micro burette - Google Patents

Abstract

The utility model relates to an automatic zeroing micro-burette, which comprises a base, wherein a liquid storage tube and a burette body are arranged above the base, a U-shaped tube is fixedly arranged at the lower end of the liquid storage tube, the other end of the U-shaped tube is fixedly connected with the lower end of the burette body, a scale mark is arranged on one side of the burette body, a liquid return tube is fixedly arranged on one side of the upper part of the burette body, a liquid outlet tube is fixedly arranged on the other side of the upper part of the burette body, the lower edges of the communication parts of the liquid return tube and the liquid outlet tube and the burette body are on the same horizontal plane with the zero scale mark, the burette is introduced into the burette body through the liquid storage tube and the U-shaped tube, and when the titrant reaches the zero scale mark, the titrant flows into the liquid storage tube and a waste liquid tube through the liquid return tube respectively, so that the liquid level of the titrant in the burette body can be kept on the zero scale mark, thereby realizing automatic zeroing, facilitating experiments of experimenters and reducing waste of the titrant.

Description

Automatic zeroing micro burette

Technical Field

The utility model relates to the technical field of experimental instruments, in particular to a microtitration tube capable of automatically zeroing.

Background

The titration analysis method is a method for carrying out titration by using a sample according to the principle and technology of titration analysis, the titration tube is used for accurately discharging an uncertain amount of liquid when the titration is carried out, the titration tube is a volume instrument which is made of a slender and uniform glass tube, a scale is arranged on the tube, a tip is arranged at the lower end, a throttle is arranged in the middle for controlling the titration speed, the titration tube is firstly cleaned when in use, then the titration tube is filled with the titration liquid, then the zeroing is carried out, the titration liquid is added to the zero scale, the reading is convenient, then the titration liquid is dripped into the liquid to be detected through the tip for analysis, the reading and the calculation are carried out after the titration is completed, finally, the result is obtained, whether the titration analysis result is accurate or not has a great relation with the zeroing success or not is needed, the experimenter is required to drip the titration liquid into the titration tube when the zeroing is carried out, the zeroing operation is complicated, the efficiency of titration experiment is affected, and the zeroing is easy to exceed the scale when the titration liquid is directly poured into the titration tube, so that the zeroing failure is caused.

Disclosure of Invention

In order to overcome the technical defects in the prior art, the utility model provides the automatic zeroing micro-burette, which has the advantages of convenience and accuracy in zeroing, the burette body is filled with the burette through the liquid storage pipe and the U-shaped pipe, when the burette reaches a zero scale, the reusable burette flows into the liquid storage pipe again through the liquid return pipe, and the non-reusable burette flows into the waste liquid barrel through the liquid outlet pipe.

The technical scheme adopted by the utility model is as follows: including the base, stock solution pipe and buret body are installed to the base top, the lower extreme fixed mounting of stock solution pipe has the U type pipe, the other end of U type pipe with the lower extreme fixed connection of buret body, just the stock solution pipe with the buret body is passed through the U type pipe is linked together, there is the scale mark one side of buret body, the scale mark is drawn from top to bottom, upper portion one side fixed mounting of buret body has the liquid return pipe, the other end of liquid return pipe extends to the inside of stock solution pipe, the upper portion opposite side fixed mounting of buret body has the drain pipe, the liquid return pipe with the drain pipe with the lower edge of the intercommunication department of buret body with the zero scale mark of scale mark is on same horizontal plane, when using, firstly pour into the stock solution, then the titrant passes through the U type pipe flows into in the buret body, when reaching the zero scale mark on the scale mark, can reuse the stock solution passes through the liquid return pipe, reuse the liquid return pipe, can be in the capillary tube with the waste of capillary tube, thereby can the waste in the capillary tube is accomplished to the capillary, thereby the experiment can be done in the capillary zero.

Preferably, the upper end fixed mounting of base has the anticorrosion pad, upper end one side fixed mounting of base has the support column, set up the spout in the support column, rotate the installation threaded rod in the spout, the upper end of threaded rod extends to the upper end of support column, the upper end fixed mounting of threaded rod has the knob, slidable mounting has the slider in the spout, the slider cup joints on the threaded rod, just the slider with threaded rod threaded connection, one side fixed mounting of slider has the grip block, the front end both sides fixed mounting of grip block has the jack catch, the material of jack catch is soft plastics material, the liquid reserve pipe with buret body joint is in on the jack catch, through the threaded rod rotates can drive the slider reciprocates in the spout to can adjust and fix on the jack catch the height of buret body, make things convenient for the experiment to go on.

Preferably, the upper end fixed mounting of liquid reserve pipe has the funnel, the upper end of liquid reserve pipe is passed through the funnel is linked together with the outside, the upper portion fixed mounting of liquid reserve pipe has sealing valve, sealing valve is located the below of funnel can prevent through the funnel that the titration solution from falling on the desktop when empting, prevents to cause the injury to the experimenter.

Preferably, one side fixed mounting of stock solution pipe has the intake pipe, the intake pipe is located the top of liquid return pipe, the one end fixed mounting of intake pipe has the gasbag, the gasbag passes through the intake pipe with the inside of stock solution pipe is linked together, the intermediate position of stock solution pipe has the stock solution ball, the stock solution ball is located the below of liquid return pipe, fixed mounting has the communication valve on the U type pipe, through the gasbag can adjust the stock solution pipe the U type pipe with the atmospheric pressure in the buret body, thereby with the introduction of buret in the buret body, make things convenient for experimenter to carry out the zeroing simultaneously.

Preferably, one side of the lower part of the burette body is fixedly provided with a connecting pipe, the connecting pipe is located below the scale marks, one end of the connecting pipe is fixedly provided with a titration tip, the lower end of the burette body is communicated with the outside through the connecting pipe and the titration tip, the connecting pipe is fixedly provided with a titration valve, and the speed of the titration liquid flowing out of the titration tip can be adjusted through the titration valve, so that the accuracy of experiments is improved.

Preferably, the liquid return valve is fixedly arranged on the liquid return pipe, the liquid outlet valve is fixedly arranged on the liquid outlet pipe, and the titration liquid higher than the zero scale can flow out of the titration pipe body through the opening and closing of the liquid return valve and the liquid outlet valve, so that the waste of the titration liquid is reduced, and meanwhile, the automatic zero setting can be realized.

The beneficial effects of the utility model are as follows: the liquid storage tube and the U-shaped tube are used for leading the titration liquid into the titration tube body, when the titration liquid reaches the zero scale, the titration liquid which can be recycled flows into the liquid storage tube again through the liquid return tube, the titration liquid which cannot be recycled flows into the waste liquid tube through the liquid outlet tube, and the liquid level of the titration liquid in the titration tube body can be kept on the zero scale in the manner, so that automatic zeroing is realized, and the waste of the titration liquid is reduced when an experimenter performs experiments.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

FIG. 2 is a half cross-sectional view of a portion of a support column structure according to the present utility model.

FIG. 3 is a schematic view of a U-shaped pipe connection structure according to the present utility model.

FIG. 4 is a cross-sectional view showing the internal structure of a liquid storage tube according to the present utility model.

Reference numerals illustrate: in the figure: 1. a base; 2. a liquid storage tube; 3. a burette body; 4. a U-shaped tube; 5. scale marks; 6. a liquid return pipe; 7. a liquid outlet pipe; 8. an anti-corrosion pad; 9. a support column; 10. a chute; 11. a threaded rod; 12. a knob; 13. a slide block; 14. a clamping plate; 15. a claw; 16. a funnel; 17. a sealing valve; 18. an air inlet pipe; 19. an air bag; 20. a liquid storage ball; 21. a communication valve; 22. a connecting pipe; 23. titration tip; 24. a titration valve; 25. a liquid return valve; 26. and a liquid outlet valve.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1-4, this embodiment provides an auto-zeroable micro-titer tube, including base 1, liquid storage tube 2 and buret body 3 are installed to base 1 top, the lower extreme fixed mounting of liquid storage tube 2 has the other end of U-shaped tube 4,U type tube 4 and the lower extreme fixed connection of buret body 3, and liquid storage tube 2 and buret body 3 are linked together through U-shaped tube 4, one side of buret body 3 has scale mark 5, scale mark 5 is drawn from top to bottom, upper portion one side fixed mounting of buret body 3 has back-flow tube 6, the other end of back-flow tube 6 extends to the inside of liquid storage tube 2, upper portion opposite side fixed mounting of buret body 3 has drain pipe 7, the lower extreme of back-flow tube 6 and drain pipe 7 and buret body 3 junction is on same horizontal plane with the zero scale mark 5, when using, firstly pour the buret into liquid storage tube 2, then the buret flows into buret body 3 through U-shaped tube 4, when reaching the zero scale mark on 5, can reuse the back-flow tube 6 through the back-flow tube, can the waste of the capillary tube in the same experiment can be reduced in the same horizontal plane with the body, thereby the experiment can be done in the same experiment can the back-flow tube 3.

As a technical optimization scheme of the utility model, as shown in fig. 2, an anti-corrosion pad 8 is fixedly arranged at the upper end of a base 1, a support column 9 is fixedly arranged at one side of the upper end of the base 1, a chute 10 is arranged in the support column 9, a threaded rod 11 is rotatably arranged in the chute 10, the upper end of the threaded rod 11 extends to the upper end of the support column 9, a knob 12 is fixedly arranged at the upper end of the threaded rod 11, a sliding block 13 is slidably arranged in the chute 10, the sliding block 13 is sleeved on the threaded rod 11, the sliding block 13 is in threaded connection with the threaded rod 11, a clamping plate 14 is fixedly arranged at one side of the sliding block 13, clamping claws 15 are fixedly arranged at two sides of the front end of the clamping plate 14, the clamping claws 15 are made of soft plastic materials, a liquid storage tube 2 and a burette body 3 are clamped on the clamping claws 15, when the base 1 is fixedly placed at a use place, the liquid storage tube 2 and the burette body 3 are clamped on the clamping claws 15 to be fixed, then the knob 12 is rotated, the knob 12 is driven to rotate, the threaded rod 11 is driven to move in the chute 10, and the heights of the clamping plates 14 and the clamping claws 15 can be adjusted, and the heights of the liquid storage tube 2 and the burette body 3 can be adjusted.

As a technical optimization scheme of the utility model, as shown in figure 3, a funnel 16 is fixedly arranged at the upper end of a liquid storage tube 2, the upper end of the liquid storage tube 2 is communicated with the outside through the funnel 16, a sealing valve 17 is fixedly arranged at the upper part of the liquid storage tube 2, the sealing valve 17 is positioned below the funnel 16, an air inlet tube 18 is fixedly arranged at one side of the liquid storage tube 2, the air inlet tube 18 is positioned above a liquid return tube 6, an air bag 19 is fixedly arranged at one end of the air inlet tube 18, the air bag 19 is communicated with the inside of the liquid storage tube 2 through the air inlet tube 18, a liquid storage ball 20 is arranged in the middle position of the liquid storage tube 2, the liquid storage ball 20 is positioned below the liquid return tube 6, a communication valve 21 is fixedly arranged on a U-shaped tube 4, a liquid return valve 25 is fixedly arranged on the liquid return tube 6, a liquid outlet valve 26 is fixedly arranged on the liquid outlet tube 7, after the liquid return tube is fixed, the sealing valve 17 is opened, closing the communication valve 21, the titration valve 24, the liquid return valve 25 and the liquid outlet valve 26, pouring the titration liquid into the liquid storage tube 2 through the funnel 16 until the liquid level of the titration liquid is positioned between the liquid storage ball 20 and the liquid return tube 6, wherein the liquid storage ball 20 can reduce the adding times of the titration liquid, improve the efficiency of experiments, then closing the sealing valve 17, opening the communication valve 21, then inflating the liquid storage tube 2 through the air bag 19, thereby squeezing the titration liquid into the titration tube body 3 until the titration liquid is positioned on a zero scale, closing the communication valve 21, opening the liquid return valve 25 if the titration liquid can be repeatedly utilized, re-flowing the titration liquid into the liquid storage tube 2 through the liquid return tube 6, opening the liquid outlet valve 26 if the titration liquid cannot be repeatedly utilized, and flowing the titration liquid into the liquid waste tube through the liquid outlet tube 7, so that the liquid level of the titration liquid in the titration tube body 3 is positioned on the zero scale, thereby completing the titration operation.

As a technical optimization scheme of the utility model, as shown in FIG. 4, a connecting pipe 22 is fixedly arranged at one side of the lower part of a burette body 3, the connecting pipe 22 is positioned below a scale mark 5, one end of the connecting pipe 22 is fixedly provided with a titration tip 23, the lower end of the burette body 3 is communicated with the outside through the connecting pipe 22 and the titration tip 23, a titration valve 24 is fixedly arranged on the connecting pipe 22, and when the titration is carried out, the titration valve 24 is rotated, and under the action of gravity, a titration solution is dripped into a reaction vessel through the connecting pipe 22 and the titration tip 23 for reaction, so that the titration of the titration solution is completed.

While the basic principles and main features of the utility model and advantages of the utility model have been shown and described, it will be understood by those skilled in the art that the present utility model is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents.

Claims (8)

1. A microtitration tube capable of automatically zeroing, comprising a base (1), characterized in that: liquid storage tube (2) and buret body (3) are installed to base (1) top, the lower extreme of liquid storage tube (2) has U type pipe (4), the other end of U type pipe (4) with the lower extreme fixed connection of buret body (3), just liquid storage tube (2) with buret body (3) are linked together through U type pipe (4), there is scale mark (5) one side of buret body (3), scale mark (5) are drawn from top to bottom, upper portion one side fixed mounting of buret body (3) has back liquid pipe (6), the other end of back liquid pipe (6) extends to the inside of liquid storage tube (2), the upper portion opposite side fixed mounting of buret body (3) has drain pipe (7), back liquid pipe (6) with the drain pipe (7) with the lower edge of the intercommunication department of buret body (3) with the zero scale mark of scale mark (5) is on same horizontal plane.

2. An auto-zeroable microtiter plate according to claim 1, wherein: the anti-corrosion base is characterized in that an anti-corrosion pad (8) is fixedly arranged at the upper end of the base (1), a support column (9) is fixedly arranged at one side of the upper end of the base (1), and a sliding groove (10) is formed in the support column (9).

3. An auto-zeroable microtiter plate according to claim 2, wherein: the sliding chute (10) is rotationally provided with a threaded rod (11), the upper end of the threaded rod (11) extends to the upper end of the supporting column (9), and a knob (12) is fixedly arranged at the upper end of the threaded rod (11).

4. An auto-zeroable microtiter plate according to claim 3, wherein: sliding mounting has slider (13) in spout (10), slider (13) cup joint on threaded rod (11), just slider (13) with threaded rod (11) threaded connection, one side fixed mounting of slider (13) has grip block (14), the front end both sides fixed mounting of grip block (14) has jack catch (15), the material of jack catch (15) is soft plastics material, liquid reserve pipe (2) with buret body (3) joint is in on jack catch (15).

5. An auto-zeroable microtiter plate according to claim 1, wherein: the upper end of the liquid storage pipe (2) is fixedly provided with a funnel (16), the upper end of the liquid storage pipe (2) is communicated with the outside through the funnel (16), the upper part of the liquid storage pipe (2) is fixedly provided with a sealing valve (17), and the sealing valve (17) is positioned below the funnel (16).

6. An auto-zeroable microtiter plate according to claim 5 wherein: one side fixed mounting of stock solution pipe (2) has intake pipe (18), intake pipe (18) are located the top of liquid return pipe (6), the one end fixed mounting of intake pipe (18) has gasbag (19), gasbag (19) are passed through intake pipe (18) with the inside of stock solution pipe (2) is linked together, the intermediate position of stock solution pipe (2) has stock solution ball (20), stock solution ball (20) are located the below of liquid return pipe (6), fixed mounting has communication valve (21) on U type pipe (4).

7. An auto-zeroable microtiter plate according to claim 1, wherein: the burette comprises a burette body (3), wherein a connecting pipe (22) is fixedly arranged on one side of the lower part of the burette body (3), the connecting pipe (22) is located below the scale marks (5), a titration tip (23) is fixedly arranged at one end of the connecting pipe (22), the lower end of the burette body (3) is communicated with the outside through the connecting pipe (22) and the titration tip (23), and a titration valve (24) is fixedly arranged on the connecting pipe (22).

8. An auto-zeroable microtiter plate according to claim 1, wherein: the liquid return valve (25) is fixedly arranged on the liquid return pipe (6), and the liquid outlet valve (26) is fixedly arranged on the liquid outlet pipe (7).