CN207694837U - A kind of micro control pipette of new chemical experiment - Google Patents

Abstract

The utility model discloses a novel chemical experiment micro-control pipette, which belongs to the technical field of chemical experiment instruments. The pipette includes a main pipette body, an adjustable stand, a micro control syringe, and an ear wash ball. The main body of the pipette has a main cock and a side cock, which can be used in the process of absorbing and discharging liquid, and can also ensure the airtightness of the pipette. The adjustable bracket supports the pipette, which can be adjusted in up, down, left, and right directions, which can make the pipette more stable when sucking liquid. The micro-control syringe can discharge the excess liquid in a controlled manner after absorbing too much liquid, which increases the accuracy of the pipetting volume. The ear wash ball can be used to aspirate liquid and facilitate cleaning of the pipette. The utility model is convenient to use and not easy to be damaged.

Description

A new micro-controlling pipette for chemical experiments

technical field

The utility model relates to a chemical experiment instrument, in particular to a novel chemical experiment micro-control pipette.

Background technique

A pipette is a measure-out instrument that is only used to measure the volume of the solution it releases. It is a long and thin glass tube with a pointed mouth at the lower end and a marking line engraved on the diameter of the upper end to indicate The exact volume is obtained by pipetting; the current method of using the pipette in chemical reagents is roughly a few steps, first wash the pipette several times with distilled water, and rinse three times with the liquid sample; when pipetting the solution, put the pipette The tip of the ear wash goes deep into the solution, hold the ear wash ball in the left hand, and hold the pipette above the marking line in the right hand, use the ear wash ball to suck the solution into the pipette, and quickly remove the ear wash ball when the liquid level rises above the required scale , block the mouth of the pipette with your right finger, then turn your index finger slightly to let the liquid level drop slowly and steadily, until the concave liquid level of the solution drops to the required scale and is on a horizontal plane, then press the mouth of the pipette tightly without stopping. Let the solution flow out; finally, place the tip of the pipette against the inner wall of the receiving device, let the solution flow out freely, and remove the pipette when the solution no longer flows out. In the process of taking liquid, if the liquid cannot be absorbed stably, the water surface will not be level, and if the ear washing ball is not fast enough to block it with fingers, the absorbed solution will drop too fast, which may drop to below the required scale; when dispensing liquid, the operation of slightly turning and relaxing the finger may cause the liquid level to drop below the required scale, it is difficult to control the liquid discharge volume, and the precise pipetting volume cannot be determined. cumbersome and increases the chance of experimental error.

Contents of the invention

The purpose of this utility model is to provide a new type of micro-control pipette for chemical experiments in order to solve the problems in the above-mentioned prior art.

In order to achieve the above object, the utility model provides the following technical solutions: a novel micro-control pipette for chemical experiments, including a pipette main body, an adjustable bracket, a micro-control syringe, ear wash balls, the adjustable bracket There are up and down adjustment shafts and left and right adjustment shafts, which can be applied to different liquid-taking containers to absorb liquid, which can ensure that the pipette can absorb liquid stably and make the operation easier; the top opening of the pipette main body has a cock , there is also a cock at the opening on the right side of the upper part, which can ensure the airtightness of the pipette during use, and can also perform better suction and discharge operations. There is a scale on the main body of the pipette, which can be read. The amount of liquid in the liquid tube; there is a scale on the micro-control syringe, which has a certain proportional relationship with the main body of the pipette, and the excess liquid in the pipette can be discharged by discharging the air in the micro-control syringe, so that the pipette can be controlled Quantitative accuracy.

Further, the micro-control pipette is mainly composed of a pipette main body and a micro-control syringe, and a closed pipette is formed by the main cock and the side cock, which can absorb liquid and control the amount of pipetting respectively by rotating the cock, and In the operation of suction and discharge, it can ensure the airtightness of the pipette, increase the accuracy of the pipetting volume, and reduce the mistakes in the operation.

Further, the scale of the main body of the pipette has a certain proportional relationship with the scale of the micro-control syringe, and the gas volume of the five small scales of the micro-control syringe can allow the liquid in the main body of the pipette to drop by one in the pipette. The small scale can control the required pipetting volume more accurately.

Further, the adjustable bracket can pipette liquid under different circumstances, can be adjusted up and down, and can also be adjusted left and right, and can be applied to absorb liquid in different containers to ensure that the liquid absorbing is more stable and convenient.

Further, there are cocks at the two openings of the main body, which can be adjusted. The main cock can be rotated after the ear washing ball absorbs liquid to ensure the airtightness of the pipette. The side cock can be opened when the liquid is sucked too much, and then passed Drain excess solution with a micro control syringe.

Further, the entire micro-control pipette is made of polytetrafluoroethylene material.

Description of drawings

Fig. 1 is a schematic diagram of a novel chemical experiment micro-control pipette of the present invention.

Fig. 2 is an enlarged schematic view of the top of the main body and the upper right cock in the utility model.

In the figure: 1. ear wash ball; 2. main cock; 3. side cock; 4. micro control syringe; 5. up and down telescopic shaft; 6. adjusting up and down telescopic knob; Shaft; 9. Adjust the left and right telescopic knobs; 10. Adjustable bracket; 11. Piston.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Referring to Fig. 1, a new type of micro-control pipette for chemical experiments described in the utility model patent, the micro-control pipette includes a pipette main body (7), an ear washing ball (1), a micro-control syringe ( 4) and the adjustable bracket (10), through the main cock (2) and side cock (3) of the pipette main body (7) to ensure the airtightness of the entire pipette, when aspiration is performed in different containers , you can adjust the adjustable bracket (10), the two sides of the bracket are symmetrical, adjust the upper and lower telescopic shafts (5) by adjusting the upper and lower telescopic knobs (6), so as to achieve height adjustment, and adjust the left and right telescopic knobs (9). Adjust the left and right telescopic shafts (8), so as to realize the adjustment of the left and right width, and then perform aspiration, open the main cock (2) of the pipette main body (7), and use the ear cleaning ball (1) to aspirate, When the concave liquid level of the solution in the pipette main body (7) rises above the required scale, close the main cock (2) of the pipette, and let the piston (11) in the micro control syringe (4) point to To a certain scale, insert the needle port of the micro-control syringe (4) into the special nozzle on the upper right side of the pipette main body (7) to ensure its airtightness, open the side cock (3) of the pipette main body (7), Slowly push the piston (11) of the micro-control syringe (4), and by pushing the piston (11) of the micro-control syringe (4), the meniscus of the liquid in the pipette main body (7) will drop, so as to reach the required scale , to obtain the required pipetting volume.

Refer to Figure 2, Figure 2 is an enlarged view of the cock, the structure of the main cock is exactly the same as that of the side cock, and there is a hole on the cock, which can realize airtightness and other operations by turning the cock, when the hole of the main cock (2) is the same as the pipetting The mouth of the pipette is in the same direction, and the liquid can be sucked through the ear washing ball (1). After the liquid is sucked, the cock (11) can be turned immediately so that the direction of the cock hole intersects with the direction of the pipette nozzle to ensure that the sucked liquid does not Falling down, when the side cock (3) is turned, the hole of the cock is in the same direction as the nozzle on the right side, and the excess liquid in the pipette can be discharged by pushing the piston (11).

Referring to Figure 1 and Figure 2, the entire micro-control pipette is made of polytetrafluoroethylene. The entire micro-control pipette is light in weight, easy to transport, and not easy to damage. It will not break and cause danger during the experiment, and has excellent performance. It is resistant to acid and alkali and high and low temperature, and can be used for a long time in the range of -200~250°C.

The above description is a further description of the utility model, not a limitation of the utility model. The utility model is not limited to the above-mentioned embodiments. According to the description of the above-mentioned embodiments, those skilled in the art can also make some obvious changes, but these All changes shall belong to the scope covered by the present utility model.

Claims (5)

1. A micro-control pipette for a novel chemical experiment, comprising a pipette main body, an adjustable support, a micro-control syringe, and ear washing balls, and the adjustable support has an up-down adjustment axis and a left-right adjustment axis; the described There is a cock at the top opening of the main body of the pipette, which is called the main cock, and there is also a cock at the opening on the upper right side. There is a scale on the main body of the pipette, which can read the amount of liquid in the pipette; There is a scale on the control syringe, which can control the accuracy of the pipetting volume; the ear washing ball is used for sucking liquid and cleaning the pipette; the whole micro-control pipette is made of polytetrafluoroethylene material. 2. According to claim 1, a novel chemical experiment micro-control pipette is characterized in that said micro-control pipette mainly consists of a pipette main body and a micro-control syringe, formed by a main cock and a side cock With a closed pipette, you can aspirate liquid and control the pipetting volume by turning the cock. 3. according to claim 1, a novel chemical experiment micro-control pipette is characterized in that the scale of the pipette main body and the scale of the micro-control syringe have a certain proportional relationship, and the five micro-control syringes The gas volume of the small scale can make the liquid in the main body of the pipette drop by a small scale in the pipette, which can control the required pipetting volume more accurately. 4. according to claim 1 said a kind of novel chemical experiment micro control pipette, it is characterized in that described adjustable support can carry out pipetting in different situations, can carry out up and down regulation, also can carry out left and right regulation. 5. According to claim 1, a novel micro-control pipette for chemical experiments is characterized in that there are cocks at the two openings of the main body, which can be adjusted, and the main cock can be used after the ear washing ball absorbs liquid. Turn to ensure the airtightness of the pipette, the side cock can be opened when the suction is too much, and the cock can be closed after adjusting the required liquid volume.