CN219510391U - Pipeline and device for preventing foam from interfering sensor - Google Patents

Abstract

The utility model relates to a pipeline of an anti-foam interference sensor, which comprises a first pipeline section and a second pipeline section which are sequentially arranged, wherein the second pipeline section is positioned at the downstream of the first pipeline section, the first pipeline section encloses a first pipeline cavity, the second pipeline section encloses a second pipeline cavity, a detection part for the sensor to detect whether liquid exists in the second pipeline cavity is arranged on the second pipeline section, the inner diameter of the second pipeline cavity is smaller than that of the first pipeline cavity, a step surface is formed between the first pipeline cavity and the second pipeline cavity, and the step surface can block foam of an attached wall in at least part of the first pipeline cavity. The utility model also provides a device comprising the pipeline. The utility model can reduce or eliminate the phenomenon that the foam in the pipeline interferes with the inductor.

Description

Pipeline and device for preventing foam from interfering sensor

Technical Field

The utility model relates to a pipeline, in particular to a pipeline and a device for preventing foam from interfering with a sensor.

Background

Under the effect of positive pressure or negative pressure formed by the liquid pump, liquid flows in the pipeline, in order to close the liquid pump in time after the liquid is pumped, an inductor is arranged at a certain point of the pipeline, when the inductor detects that the liquid in the pipeline is not pumped, the inductor transmits a signal to a controller of the liquid pump, the liquid pump is controlled to continue to work, when the inductor detects that the liquid in the pipeline is not pumped, the inductor transmits a signal to the controller of the liquid pump, and the liquid pump is controlled to stop working.

The following technical problems are often faced when pumping liquids with a liquid pump: when the pumped liquid is easy to generate foam, the liquid can generate more foam under the action of certain external force (such as liquid oscillating and dispersing, mixing with air and collecting into a downstream pipeline) in the process of flowing in the pipeline, as shown in fig. 1, after the liquid is pumped, part of the foam can be pumped away, but part of the foam 103 still remains in the pipeline 101, the part of the foam 103 is easy to adhere to the inner wall of the pipeline 101, the foam 103 remaining in the pipeline 101 is difficult or difficult to dissipate, especially the foam 103 adhering to the wall of the pipeline 101 is difficult to dissipate, the foam 103 remaining in the pipeline 101 can interfere with the sensor 102, so that the sensor 102 misjudges as the liquid in the pipeline 101, further, the pumping pump is continuously operated after the liquid is pumped, the continuous operation of the pumping pump wastes time, the working efficiency is low, and the operators are worry and anxiety is brought to the working efficiency.

Positive pressure filtration devices or negative pressure filtration devices are common laboratory equipment, such as membrane filtration suction filters for liquid sample suction filtration, and existing positive pressure filtration devices or negative pressure filtration devices often face the above-described technical problems.

Disclosure of Invention

The utility model aims to provide a pipeline and a device for preventing foam from interfering with an inductor, so as to reduce or eliminate at least one technical problem.

The utility model discloses a pipeline of a foam interference prevention sensor, which comprises a first pipeline section and a second pipeline section which are sequentially arranged, wherein the second pipeline section is positioned at the downstream of the first pipeline section, the first pipeline section encloses a first pipeline cavity, the second pipeline section encloses a second pipeline cavity, a detection part for detecting whether liquid exists in the second pipeline cavity or not by the sensor is arranged on the second pipeline section, the inner diameter of the second pipeline cavity is smaller than that of the first pipeline cavity, a step surface is formed between the first pipeline cavity and the second pipeline cavity, and the step surface can block at least part of foam with walls in the first pipeline cavity.

Optionally, the step surface is perpendicular to a lumen wall of the first lumen.

Optionally, the step surface is annular, and the step surface surrounds the periphery of the central axis of the pipeline.

Optionally, the outer diameter of the second pipe section is smaller than the outer diameter of the first pipe section.

Optionally, a transparent portion is disposed on a wall of the second pipe section, and the transparent portion forms the detection portion.

Optionally, a third pipe section is connected to the downstream of the second pipe section, and the third pipe section encloses a third pipe cavity, and the inner diameter of the third pipe cavity is larger than the inner diameter of the second pipe cavity.

Optionally, the inner diameter of the first lumen is more than or equal to 0.5mm and less than or equal to 50mm.

Optionally, the conduit is applied to a positive pressure filtration device or a negative pressure filtration device.

The utility model also proposes a device comprising an inductor and a pipe according to any of the preceding claims, the inductor being arranged at the second pipe section.

Optionally, the device further comprises a vacuum pump or a booster pump, and one end of the pipeline is connected with the vacuum pump or the booster pump.

The utility model can reduce or eliminate the phenomenon that foam in the pipeline interferes with the inductor by reasonably arranging the structure of the pipeline.

Drawings

FIG. 1 is a schematic diagram of the operation of a conventional pipeline as described in the background;

FIG. 2 is a schematic view of a pipe structure of the anti-foam noise sensor according to the embodiment;

fig. 3 is a schematic diagram of the operation of the pipe of the anti-foam noise sensor according to the embodiment.

Wherein 1-a first pipe section; 2-a second pipe section; 3-a third pipe section; 4-a first lumen; 5-a second lumen; 6-a third lumen; 7-step surface; an 8-inductor; 9-foaming; 10-detection site.

Detailed Description

Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings rather than the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

The pipeline of the anti-foam interference sensor shown in fig. 2 and 3 comprises a first pipeline section 1 and a second pipeline section 2 which are sequentially connected, wherein the second pipeline section 2 is positioned at the downstream of the first pipeline section 1, the first pipeline section 1 encloses a first pipeline cavity 4, the second pipeline section 2 encloses a second pipeline cavity 5 communicated with the first pipeline cavity 4, a detection part 10 for detecting whether liquid exists in the second pipeline cavity 5 or not by the sensor 8 is arranged on the second pipeline section 2, the inner diameter of the second pipeline cavity 5 is smaller than the inner diameter of the first pipeline cavity 4, namely, the inner diameter of the second pipeline section 2 is smaller than the inner diameter of the first pipeline section 1, a step surface 7 is formed between the first pipeline cavity 4 and the second pipeline cavity 5, and the step surface 7 can block and retain foam 9 of an attached wall in at least part of the first pipeline cavity 4.

By adopting the scheme, on one hand, because the inner diameter of the second lumen 5 is smaller than the inner diameter of the first lumen 4, a flow speed difference is formed between the second lumen 5 and the first lumen 4, the flow speed of liquid or gas in the second lumen 5 is larger than that of the liquid or gas in the first lumen 4, and the rapid flow speed in the second lumen 5 and the change of the flow speed between the first lumen 4 and the second lumen 5 both enable the foam 9 in the second lumen 5 (comprising the foam 9 moving from the first lumen 4 to the second lumen 5) to be taken away and blown away quickly without attaching walls, and the foam 9 in the second lumen 5 can be effectively removed to meet the identification judgment of the sensor; on the other hand, a step surface 7 is formed between the first lumen 4 and the second lumen 5, and the step surface 7 can block and retain the foam 9 on the lumen wall of the first lumen 4 due to the wall attachment property of the foam 9, so that the foam 9 moving from the lumen wall of the first lumen 4 to the second lumen 5 can be effectively reduced, and the foam 9 in the second lumen 5 can be reduced. Through the two aspects, the foam 9 in the second lumen 5 is effectively eliminated, especially the foam 9 on the lumen wall of the second lumen 5 is effectively eliminated, the phenomenon that the foam 9 interferes with the inductor 8 can be effectively eliminated, the inductor 8 can accurately detect whether liquid exists in a pipeline, and a liquid drawing pump can be timely closed after liquid drawing is completed.

In the above technical solution, the flow velocity difference is realized by reducing the diameter of the pipeline, and the flow velocity of the liquid or gas (the gas such as the air in the pipeline after the liquid is pumped) in the second pipe cavity 5 is increased under the premise that the negative pressure/positive pressure applied to the pipeline by the liquid pump is fixed. In practice, the smaller the ratio of the inner diameter of the second lumen 5 to the inner diameter of the first lumen 4 (ratio < 1), the greater the increase in flow rate of the liquid or gas in the second lumen 5, the more advantageous it is to clear the foam 9 in the second lumen 5.

In some embodiments, the step surface 7 is perpendicular to the lumen wall of the first lumen 4. The stepped surface 7 perpendicular to the lumen wall of the first lumen 4 can effectively block the foam 9, preventing the foam 9 from moving downstream. Through experimental comparison, when the step surface 7 vertical to the cavity wall of the first pipe cavity 4 is arranged, the foam interference prevention effect is good, and the phenomenon that the foam 9 in the pipeline interferes with the inductor 8 can be effectively reduced or eliminated; when the step surface 7 inclined to the second lumen 5 is arranged (namely, when the diameter between the second tube section 2 and the first tube section 1 is changed in an inner diameter gradual change mode), the effect of preventing foam interference is poor, and the foam of the residual attached wall of the first lumen is difficult to effectively block to move to the second lumen.

In some embodiments, the step surface 7 is annular, the step surface 7 surrounding the periphery of the central axis of the pipe. The annular step surface 7 is capable of a greater extent of blocking and entrapping foam 9 on the wall of the first lumen 4.

In some embodiments, a transparent portion is provided on the pipe wall of the second pipe section 2, the transparent portion constituting the detection site, the transparent portion being made of a transparent material. In particular embodiments, the second tube section 2 may be configured as a transparent tube section.

In some embodiments, a third pipe section 3 is connected downstream of the second pipe section 2, the third pipe section 3 encloses a third pipe cavity 6 communicating with the second pipe cavity 5, and the inner diameter of the third pipe cavity 6 is larger than the inner diameter of the second pipe cavity 5, i.e. the inner diameter of the third pipe section 3 is larger than the inner diameter of the second pipe section 2. As a specific example, the first lumen 4, the second lumen 5, and the third lumen 6 are sequentially communicated. By arranging the third pipe section 3, the first pipe section 1, the second pipe section 2 and the third pipe section 3, the foam 9 in the second pipe cavity 5 can be promoted to move towards the third pipe cavity 6, the foam 9 in the second pipe section 2 can be reduced, and liquid can be discharged conveniently. In particular embodiments, the inner diameter of the third tube section 3 may be set to coincide with the inner diameter of the first tube section 1.

The test was performed using the above-described pipe, as shown in fig. 3, by installing the sensor 8 at the second pipe section 2, selecting a liquid containing a surfactant which is liable to generate foam 9, and confirming that a large amount of bubbles are generated in the pipe after the liquid is pumped into the pipe, the test results are: the inner wall of the second pipe section 2 basically has no residual foam 9 or little foam 9 is attached to the inner wall of the second pipe section 2, so that whether the inductor 8 can timely detect the liquid in the second pipe cavity 5 or not can be met, and the liquid pump can be timely controlled to stop working.

In some embodiments, the inner diameter of the first lumen 4 is ∈0.5mm and ∈50mm. Proved by investigation analysis and experiments, the inner diameter of the first pipe section 1 is set to be more than or equal to 0.5mm and less than or equal to 50mm, which is a preferable scheme with wide application range and feasibility. Obviously, in other embodiments, the first pipe section 1 with the inner diameter greater than 50mm or less than 0.5mm can be used according to practical application requirements. In the specific implementation, the inner diameter of the second pipe section 2 may be set according to actual working requirements, for example, the inner diameter of the second pipe section 2 is specifically designed according to the inner diameter requirement of the first pipe section 1, the working efficiency requirement, the sensitivity characteristic of the sensor 8, and the like, and the inner diameter of the second pipe section 2 may be infinitely close to zero.

In some embodiments, the tubing is applied to a negative pressure filtration device or a negative pressure filtration device, such as a membrane filtration pump that pumps a liquid sample.

In some embodiments, the utility model also proposes an apparatus comprising an inductor and a pipe as described in any of the preceding claims, the inductor being arranged at the second pipe section. In particular embodiments, the device may be a negative pressure filtration device or a negative pressure filtration device.

In some embodiments, the apparatus further comprises a vacuum pump or booster pump, one end of the conduit being connected to the vacuum pump or booster pump, the vacuum pump generating a negative pressure pump fluid and the booster pump applying a positive pressure pump fluid in actual use. As a specific example, the device is a membrane filtration suction filter, a vacuum pump, a pipeline, an inductor and a controller are arranged in the membrane filtration suction filter, one end of the pipeline is connected with the vacuum pump, the inductor is arranged at the periphery of the second pipeline section, the inductor is used for detecting whether liquid exists in the pipeline or not, further judging whether the liquid is pumped out or not, and the controller can control the operation of the vacuum pump according to the received signal of the inductor. In particular embodiments, the sensor may be a liquid sensor, such as an opto-electronic liquid sensor.

The above embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model. In the description of the present specification, a description referring to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the utility model in connection with the embodiment or example. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Claims (10)

1. The utility model provides a prevent pipeline of foam interference inductor, its characterized in that, including first pipeline section and the second pipeline section that sets gradually, the second pipeline section is located the low reaches of first pipeline section, first pipeline section encloses into first lumen, the second pipeline section encloses into the second lumen, be provided with on the second pipeline section and be used for supplying the inductor to detect whether there is the detection position of liquid in the second lumen, the internal diameter of second lumen is less than the internal diameter of first lumen, first lumen with form the step face between the second lumen, the step face can block at least part the foam of the wall of attaching in the first lumen.

2. The conduit of claim 1, wherein the step surface is perpendicular to a lumen wall of the first lumen.

3. The pipe of claim 1, wherein the step surface is annular and the step surface surrounds the periphery of the central axis of the pipe.

4. The pipe of claim 1, wherein the outer diameter of the second pipe section is smaller than the outer diameter of the first pipe section.

5. The pipe according to claim 1, wherein a transparent portion is provided on a pipe wall of the second pipe section, the transparent portion constituting the detection site.

6. The conduit according to claim 1, wherein a third conduit segment is connected downstream of the second conduit segment, the third conduit segment defining a third lumen having an inner diameter that is greater than an inner diameter of the second lumen.

7. The conduit according to claim 1, wherein the first lumen has an inner diameter of greater than or equal to 0.5mm and less than or equal to 50mm.

8. The conduit according to claim 1, wherein the conduit is applied to a positive pressure filtration device or a negative pressure filtration device.

9. An apparatus comprising an inductor and the pipe of any one of claims 1-8, the inductor being disposed at the second pipe segment.

10. The apparatus of claim 9, further comprising a vacuum pump or a booster pump, wherein one end of the conduit is connected to the vacuum pump or the booster pump.