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Quantitative liquid fetching device and use method thereof

A liquid-taking device and container technology, which is applied in the field of liquid-taking devices, can solve problems such as low precision, difficulty in automatic operation, and high price, and achieve the effects of various choices, low cost, and simple structure

Inactive Publication Date: 2014-07-02
NANJING COMM INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the test, the required amount of supernatant is certain. For example, the volume of the supernatant to be sucked is 10ml. Using a general liquid dispenser, it is necessary to draw the supernatant to the 10ml mark carefully during the specific operation. And the accuracy is not high
If you use a high-precision liquid dispenser, the price is too expensive
At the same time, the use of the above-mentioned type of liquid extractor requires manual operation by the user to carefully observe the height of the liquid absorbed, and the operation is difficult to automate

Method used

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  • Quantitative liquid fetching device and use method thereof
  • Quantitative liquid fetching device and use method thereof
  • Quantitative liquid fetching device and use method thereof

Examples

Experimental program
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Effect test

no. 1 example

[0031] Such as Figures 1 to 5 As shown, the quantitative liquid taker includes a liquid taker straw 1, wherein the upper end of the liquid taker straw 1 is inserted into the overflow container 2 and the lumen volume of the liquid taker straw 1 is adapted to the target liquid volume value, The overflow container 2 is provided with a negative pressure generating device 3 capable of generating negative pressure in the overflow container 2 and a pressure relief port 4 for eliminating the negative pressure in the overflow container 2 .

[0032] The target liquid volume is 10ml, and the lumen volume is set to 10ml.

[0033] In the embodiment, the contact surface between the suction tube 1 of the liquid collector and the overflow container 2 is sealed.

[0034] In the embodiment, the contact surface between the negative pressure generating device 3 and the overflow container 2 is sealed.

[0035] In the embodiment, the negative pressure generating device 3 is a negative pressure a...

no. 2 example

[0047] The quantitative liquid taker includes a liquid taker straw 1, wherein the upper end of the liquid taker straw 1 is inserted into the overflow container 2 and the lumen volume of the liquid taker straw 1 is adapted to the target liquid volume value, and the overflow container 2 is provided with a negative pressure generating device 3 capable of generating negative pressure in the overflow container 2 and a pressure relief port 4 for making the negative pressure in the overflow container 2 disappear.

[0048] The target liquid volume is 15ml, and the lumen volume is set at 15.2ml.

[0049]In the embodiment, the negative pressure generating device 3 is a vacuum generator. The use of a vacuum generator allows for a more convenient combination of the invention with automated equipment.

[0050] In the embodiment, the contact surface between the suction tube 1 of the liquid collector and the overflow container 2 is sealed.

[0051] In the embodiment, the contact surface be...

no. 3 example

[0056] The quantitative liquid taker includes a liquid taker straw 1, wherein the upper end of the liquid taker straw 1 is inserted into the overflow container 2 and the lumen volume of the liquid taker straw 1 is adapted to the target liquid volume value, and the overflow container 2 is provided with a negative pressure generating device 3 capable of generating negative pressure in the overflow container 2 and a pressure relief port 4 for making the negative pressure in the overflow container 2 disappear.

[0057] The target liquid volume is 5ml, and the lumen volume is set at 4.9ml.

[0058] In the embodiment, the negative pressure generating device 3 is a negative pressure airbag.

[0059] In the embodiment, the contact surface between the suction tube 1 of the liquid collector and the overflow container 2 is sealed.

[0060] In the embodiment, the contact surface between the negative pressure generating device 3 and the overflow container 2 is sealed.

[0061] In the emb...

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Abstract

The invention discloses a quantitative liquid fetching device. The quantitative liquid fetching device comprises a liquid fetching device suction tube, wherein the upper end of the liquid fetching device suction tube is inserted into an overflow liquid vessel, the volume of a tube cavity of the liquid fetching device suction tube is matched with a target fetched liquid volume value, and the overflow liquid vessel is provided with a negative pressure generating device which can enable the interior of the overflow liquid vessel to be in negative pressure, and a pressure relief opening which can enable the negative pressure inside the overflow liquid vessel to disappear. According to a method disclosed by the invention, accurate liquid fetching can be carried out without setting accurate negative pressure, so that the selection of the negative pressure generating device is diverse, and the cost is relatively low. The quantitative liquid fetching device disclosed by the invention is particularly suitable for being applied to soil composition testing experiments. According to the method disclosed by the invention, the accurate liquid fetching can be carried out without setting the accurate negative pressure, so that the selection of the negative pressure generating device is diverse, and the cost is relatively low. The quantitative liquid fetching device has the advantages that the structure is simple, the cost is low, the high-accuracy quantitative liquid fetching is realized in the case that users have no need of observing scales of the liquid fetching device, and the cooperation with an automatic device is facilitated.

Description

technical field [0001] The invention relates to the technical field of liquid-taking devices, especially a liquid-taking device, specifically, a quantitative liquid-taking device and a method for using the same. Background technique [0002] Liquid pipettes are hand-held or stationary dispensing devices for dispensing liquids, especially in laboratories. In the soil composition test experiment, the use of the liquid extractor is also very frequent. The soil composition test experiment is to immerse a certain amount of soil to be tested in a certain amount of measuring liquid, stir it evenly and let it stand for a period of time, then use a liquid picker to absorb the supernatant and measure the supernatant. In the test, the required amount of supernatant is certain. For example, the volume of the supernatant to be sucked is 10ml. Using a general liquid dispenser, it is necessary to draw the supernatant to the 10ml mark carefully during the specific operation. And the accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/02
Inventor 刘凤翰
Owner NANJING COMM INST OF TECH
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