CN209790948U

CN209790948U - Device for taking out upper-layer solvent from layered solvent

Info

Publication number: CN209790948U
Application number: CN201920479921.9U
Authority: CN
Inventors: 丁大伟; 刘雪; 李春雨; 颜廷
Original assignee: Qingdao Ride Instruments Co Ltd
Current assignee: Qingdao Ride Instruments Co Ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2019-12-17
Anticipated expiration: 2029-04-10

Abstract

The utility model provides a device for taking out upper solvent from layered solvent, which comprises a solvent containing device, a movable device and a liquid level detection device; the solvent accommodating device comprises a containing cup and a sample inlet and outlet pipe; the movable device is used for changing the relative positions of the variable volume measuring cup and the pipe orifice of the sample inlet and outlet pipe; the liquid level detection device comprises a first pipeline, a liquid level sensor and a suction pump, wherein the liquid level sensor and the suction pump are positioned on the first pipeline, one end of the first pipeline is connected with the sample inlet and outlet pipe, and the other end of the first pipeline is communicated with the air. The utility model provides a to two kinds of solution layering after, how to take out the difficult problem of upper solution accuracy.

Description

Device for taking out upper-layer solvent from layered solvent

Technical Field

The utility model belongs to the technical field of chemical analysis, concretely relates to take out device of upper solvent from layering solvent.

background

In chemical analysis experiments, separation is usually carried out after two incompatible solvents are separated, such as extraction experiments. The separation operation is usually performed manually using a separatory funnel, for example, by manually adding the reagent and water, manually shaking for several minutes, then placing the separatory funnel on an iron stand to stand for layering, after the reagent is layered with water, draining the lower layer of water (if the reagent has a smaller specific gravity than water), and collecting the reagent for measurement. The manual operation needs to add the reagent by hand, so that the reagent is exposed in the air of the operation, and the organic solvent is a volatile substance mostly, so that the human body is damaged to different degrees. And the upper solution is difficult to be accurately taken out by adopting the separating funnel.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a take out device of upper solvent from the layering solvent, solved the difficult problem how to take out upper solution accuracy.

the utility model discloses a device for taking out upper solvent from layered solvent, which comprises a solvent containing device, a movable device and a liquid level detection device; the solvent accommodating device comprises a containing cup and a sample inlet and outlet pipe; the movable device is used for changing the relative positions of the variable volume measuring cup and the pipe orifice of the sample inlet and outlet pipe; the liquid level detection device comprises a first pipeline, a liquid level sensor and a suction pump, wherein the liquid level sensor and the suction pump are positioned on the first pipeline, one end of the first pipeline is connected with the sample inlet and outlet pipe, and the other end of the first pipeline is communicated with the air.

Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses a take out the liquid level of the first liquid of measurement that device of upper solvent can be accurate in the solvent of follow layering, take out upper solution according to the liquid level accuracy of first liquid again. The device can realize full-automatic operation without human approach, thereby effectively avoiding the harm of organic chemical solvent to human body.

Drawings

FIG. 1 is a schematic view of an apparatus for removing the upper solvent from the layered solvent according to this embodiment.

The figure is marked with: the device comprises a measuring cup 1, a sample plate 2, a third motor 4, a stirring motor 5, a mechanical arm 6, a first motor 7, a sample inlet and outlet pipe 8, a liquid level sensor 9, a waste liquid barrel 14, a quantitative liquid pump 16, a second liquid container 18, an organic phase hydrophobic filter 20, a suction pump 21, a magnesium silicate column 25, a three-way valve 26, a detection cup 27 and a pure water barrel 29.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the following embodiments.

A device for taking out an upper-layer solvent from a layered solvent comprises a solvent accommodating device, a stirring device, a movable device, a liquid level detection device, a liquid inlet device and a cleaning device.

The solvent containing device is used for containing a sample solvent, the solvent containing device in the embodiment comprises a sample disc 2, a capacity cup 1 and a sample inlet and outlet pipe 8, at least one capacity cup 1 is arranged on the sample disc 2, and the sample inlet and outlet pipe 8 can vertically extend into any one capacity cup 1. The inner diameter of the pipe for entering and exiting the sample pipe is 1-5mm, preferably 2-3mm, which can not only ensure that the impurities in the water do not block the pipeline, but also ensure enough flow velocity.

Wherein the stirring device is used for stirring the sample solvent in the volume cup 1, in this embodiment, the stirring device comprises a stirring motor 5 and a stirring rotor, and the stirring motor 5 is located below the volume cup 1. The stirring rotor, preferably a magnetic stirring rotor, is placed in the volume cup 1, and is driven to rotate by the rotation of the stirring motor 5. Alternatively, the stirring device may be a stirring rod extending into the container 1, or other stirring devices commonly used in the art.

Wherein the movable device is used for changing the relative position of the variable volume cup 1 and the orifice of the sample inlet/outlet tube 8. In this embodiment, the movable device includes a mechanical arm 6 and a driving device, and the mechanical arm 6 is detachably connected to the sample inlet/outlet tube 8. The driving device can be a first motor 7 which drives the mechanical arm 6 to move up and down or a second motor which drives the sample plate 2 and the volume cup 1 to move up and down, so that the sample inlet and outlet pipe 8 or the sample plate 2 is driven to move up and down, and the sample inlet and outlet pipe 8 can move up and down at the position of the volume cup 1. In addition, when there are a plurality of volumetric cups 1 on the sample tray 2, drive arrangement still includes the third motor 4 that drives arm 6 pivoted, or drives sample tray pivoted fourth motor to drive business turn over appearance pipe 8 or sample tray 2 and rotate, make business turn over appearance pipe 8 can reciprocate in the position of any volumetric cup 1. The driving device of the embodiment can adjust the moving speed and can move at a constant speed at a certain moving speed.

Wherein the liquid inlet device is used for adding a certain amount of organic solvent into the containing cup 1. The liquid inlet device comprises a second pipeline and a liquid pump positioned on the second pipeline, one end of the second pipeline is connected with the sample inlet and outlet pipe 8, and the other end of the second pipeline is communicated with a second liquid container 18. The liquid pump is preferably a dosing pump 16, and actuation of the dosing pump 16 allows a metered amount of organic solvent to be added to the sample cup 1. In this embodiment, the liquid inlet device is an automatic liquid inlet device, and in fact, a manual liquid inlet device can be adopted. However, in order to realize automation of the whole device, without depending on manual operation, and avoid harm of organic solvent to human body, automatic liquid feeding is preferred.

Wherein the liquid level detection device is used for detecting the liquid level of the sample solvent in the measuring cup 1, in the embodiment, the liquid level detection device comprises a first pipeline, a liquid level sensor 9 and a suction pump 21, wherein the liquid level sensor and the suction pump are positioned on the first pipeline, one end of the first pipeline is connected with the sample inlet and outlet pipe 8, and the other end of the first pipeline is communicated with the air. Wherein the level sensor 9 is preferably a non-contact pipe level sensor and the suction pump 21 is preferably a peristaltic pump. Preferably, a three-way valve 26 is provided on the first conduit so that the first conduit can communicate with air and also with a sensing cup 27. Under the condition of not using the three-way valve 26, the detection cup can be directly placed at the pipe orifice of the first pipeline, and air circulation is ensured between the detection cup and the first pipeline, so that the detection cup is not sealed.

Wherein the cleaning device is used for cleaning the first pipeline and the second pipeline.

The use method of the device comprises the following steps

1) the liquid level height of first liquid is measured, and the concrete operation is, add the first liquid that awaits measuring into capacity cup 1, start corresponding motor, place the mouth of pipe of business turn over appearance pipe 8 in the rim of a cup of capacity cup 1, start suction pump 21 and carry out forward rotation (here, suction pump 21 forward rotation is for business turn over appearance pipe 8 realization advance a kind, and the back rotation is for business turn over appearance pipe 8 realization appearance), business turn over appearance pipe 8 begins the suction air.

And moving the sample inlet and outlet pipe 8 or the volume cup 1 upwards to enable the pipe orifice of the sample inlet and outlet pipe 8 to be gradually close to the liquid level of the first liquid, stopping moving the sample inlet and outlet pipe 8 or the volume cup 1 after the liquid level sensor 9 detects that liquid enters the sample inlet and outlet pipe 8, and calculating the absolute height of the liquid level according to the moving speed and the moving time. That is, the timing is started when the nozzle of the sample inlet/outlet tube 8 is located at the cup opening of the measuring cup 1, the sample inlet/outlet tube 8 or the measuring cup 1 starts to move, the timing is ended when the liquid level sensor 9 detects that liquid enters the sample inlet/outlet tube 8, the time is the moving time, the moving speed is set manually, the moving distance is obtained by multiplying the moving time by the moving speed, and the moving distance is the distance between the cup opening of the measuring cup 1 and the liquid level of the first liquid.

2) adding the second liquid into the first liquid, and mixing the first liquid and the second liquid to separate layers again. And taking the liquid level of the first liquid obtained by the measurement as a reference surface, and placing the orifice of the sample inlet/outlet pipe 8 1-5mm above the reference surface. Theoretically, the reference surface is an interface between the first liquid and the second liquid, the upper layer of liquid can be sucked by placing the sample inlet and outlet pipe orifice 1-2mm above the reference surface, but the sample which is less prone to layering is more blurred because the interface between the first liquid and the second liquid is more blurred, and the upward moving distance can be properly increased. The suction pump 21 is started to rotate in the forward direction, and the upper layer liquid is sucked into the detection cup 27 through the in-out sample tube 8.

In this embodiment, the orifice of the sample inlet/outlet tube 8 is placed 1-5mm above the interface of the two layers of solutions, and then the upper layer of solution is pumped from bottom to top until the liquid level is below the orifice of the sample inlet/outlet tube 8, so as to ensure that all the liquid entering the detection cup 27 is the upper layer of liquid.

Preferably, an impurity removing device, such as a dehydration device and a deoiling device, can be arranged on the second pipeline at the upstream of the detection cup.

3) And a cleaning step, which comprises cleaning the first pipeline and cleaning the second pipeline. The washing step may be performed before step 1) or after step 2).

Example 1

A device for extracting and separating petroleum substances from water and a using method thereof,

1) Water (first liquid) containing petroleum substances is placed in a volume cup 1 on a sample tray 2, a moving mechanical arm 6 moves a pipe orifice of an in-out sample pipe 8 to a cup mouth of the volume cup 1, a suction pump 21 is started to rotate in the forward direction, the in-out sample pipe 8 starts to suck air, the in-out sample pipe 8 moves downwards from the cup mouth of the volume cup 1 to the liquid level, the liquid enters the in-out sample pipe 8, and the mechanical arm 6 stops descending when the liquid level sensor 9 detects that the liquid exists.

The timing is started when the pipe orifice of the sample inlet and outlet pipe 8 is located at the cup opening of the measuring cup 1, meanwhile, the corresponding motor of the mechanical arm 6 is started to drive the sample inlet and outlet pipe 8 to move towards the liquid level direction, the timing is finished when the liquid level sensor 9 detects that liquid enters the sample inlet and outlet pipe 8, the movement time is recorded, the descending speed of the mechanical arm 6 is recorded as the moving speed, the moving time is multiplied by the moving speed to obtain the moving distance, and the moving distance is recorded as the distance between the cup opening of the measuring cup 1 and the liquid level of the first liquid.

2) And starting a quantitative liquid pump 16 to pump a certain volume of n-hexane (second solution) from a container (second liquid container 18) containing the n-hexane, injecting the n-hexane (second solution) into the sample cup 1 through the sample inlet and outlet pipe 8, starting a stirring device to stir and extract the mixed solution in the volume cup 1, and standing for layering.

After extraction is finished, the sample inlet and outlet pipe 8 is placed 1-2mm above the reference surface to start sampling, so that all extracted liquid is layered n-hexane at the upper layer. An organic phase hydrophobic filter 20 (one of dehydration devices) and a magnesium silicate column 25 (one of deoiling devices) are arranged on the upstream of the detection cup on the second pipeline, water in a small amount of n-hexane is removed through the organic phase hydrophobic filter 20, it is ensured that all liquid entering the detection cup 27 is organic solvent, and the magnesium silicate column 25 can be used for removing vegetable oil. By the design, the pollution caused by secondary layering of liquid pumped into the separation container is reduced, and the cleaning time and the cleaning difficulty of the cleaning pipeline are reduced.

In this embodiment, the first pipe is cleaned by reversing the suction pump 21, and pure water is pumped from the pure water tank 29 through the first pipe, discharged from the sample inlet/outlet pipe 8, and introduced into the measuring cup 1. The second line is cleaned by pumping the organic solvent from a container 18 containing n-hexane by a constant volume liquid pump 16 and reaches the waste liquid tank 14 through the second line.

The above embodiments are only some of several preferred embodiments of the present invention, and it should be noted that the present invention is not limited to the above embodiments; for a person skilled in the art, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims

1. An apparatus for removing upper solvent from layered solvent, comprising solvent containing means, movable means and liquid level detecting means;

The solvent accommodating device comprises a containing cup and a sample inlet and outlet pipe;

The movable device is used for changing the relative positions of the variable volume measuring cup and the pipe orifice of the sample inlet and outlet pipe;

The liquid level detection device comprises a first pipeline, a liquid level sensor and a suction pump, wherein the liquid level sensor and the suction pump are positioned on the first pipeline, one end of the first pipeline is connected with the sample inlet and outlet pipe, and the other end of the first pipeline is communicated with the air.

2. The apparatus of claim 1, further comprising a stirring device for stirring the sample solvent in the volumetric cup, wherein the stirring device comprises a stirring motor and a stirring rotor, or a stirring rod.

3. The apparatus of claim 1, further comprising a liquid inlet means for feeding liquid into the containment vessel; the liquid inlet device comprises a second pipeline and a liquid pump positioned on the second pipeline, one end of the second pipeline is connected with the sample inlet and outlet pipe, and the other end of the second pipeline is communicated with the second liquid container.

4. The apparatus of claim 1 or 3, further comprising a cleaning device for cleaning the first conduit or the second conduit.

5. The apparatus of claim 1, wherein the movable means comprises a robotic arm and a drive mechanism; the mechanical arm is detachably connected with the sample inlet and outlet pipe; the driving device is a first motor driving the mechanical arm to move up and down or a second motor driving the capacity cup to move up and down.

6. The apparatus of claim 5, wherein the solvent containment means further comprises a sample tray on which a plurality of containment cups are placed; the driving device further comprises a third motor for driving the mechanical arm to rotate or a fourth motor for driving the sample plate to rotate.

7. The device for removing the upper solvent from the layered solvent as claimed in claim 1, wherein the inner diameter of the tube into and out of the sample tube is 1-5 mm.