CN212513222U - Double-liquid-level metering unit - Google Patents

Abstract

The utility model discloses a two liquid level measurement units, it includes proportioning device support, proportioning device top cap, two silicon photocell sensors, two LED light sources, plastic tubing, analysis circuit board. Two strip-shaped slits are formed between the quantitative device bracket and the quantitative device top cover. The utility model takes the sensitivity of the pipeline matching of the plastic pipe, the LED light source, the silicon photocell sensor and the quantifying device as the core, and finally realizes the accurate and sensitive liquid level detection by the acquisition and processing of the signal through the analysis circuit; the difficulty of pipeline connection is reduced, the operation is simple, and the reliability is high.

Description

Double-liquid-level metering unit

Technical Field

The utility model relates to a water quality analysis and liquid way measurement analysis field, concretely relates to two liquid level measurement units.

Background

The requirements of the existing market on water quality online detection equipment are that the detection data precision is high and the data stability is good; and a good liquid level metering unit is needed to ensure high precision and good stability of the detected data.

At present, the water quality on-line monitoring products on the market are many, and the adopted liquid level metering modes mainly comprise the following two modes:

(1) as shown in figure 1, a photoelectric switch device is adopted for liquid level quantification, and the photoelectric switch is placed on a pipeline for liquid inlet of the equipment. The sensitization clearance of photoelectric switch is very narrow, all can appear misjudgement to bubble and the remaining tiny liquid pearl of pipe wall, and the plastic tubing is easily receive the pollution of reagent to change colour simultaneously, needs often to change the pipeline, and whole liquid level measurement unit receives certain liquid and overshoots simultaneously.

(2) The liquid level is judged by the strength of a receiving end signal when the glass tube passes through liquid. The problems of bubbles and small liquid beads of a thick glass tube are solved, but the use amount of reagents and water of equipment is greatly increased, so that secondary pollutants are generated. And the glass tube needs to be cleaned every sampling, and the liquid level quantification stability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to prior art not enough, the utility model provides a two liquid level measurement units combines to form images the principle, designs the measurement unit to sample quantitative high accuracy and high stability have been realized.

The purpose of the utility model is realized through the following technical scheme:

a double-liquid-level metering unit comprises a quantifying device support, a quantifying device top cover, two silicon photocell sensors, two LED light sources, a plastic pipe and an analysis circuit board, wherein the quantifying device support is provided with two parallel LED mounting grooves, a plastic pipe mounting through hole and a sensor mounting positioning groove, and the plastic pipe mounting through hole and the sensor mounting positioning groove are vertically arranged with the LED mounting grooves; the plastic pipe mounting through hole is positioned between the LED mounting groove and the sensor mounting positioning groove, an LED light source is arranged in each LED mounting groove, the plastic pipe is mounted in the plastic pipe mounting through hole, the two silicon photocell sensors are both arranged in the sensor mounting positioning groove, each silicon photocell sensor corresponds to one LED light source, and light beams emitted by each LED light source can be received by the corresponding silicon photocell sensor;

the quantitative device top cover is buckled on the quantitative device bracket, and two strip-shaped bulges are arranged at the position of the quantitative device top cover corresponding to the plastic pipe, so that after the quantitative device top cover is buckled with the quantitative device bracket, a first strip-shaped slit is formed at one side of the plastic pipe close to the LED light source, and a second strip-shaped slit is formed between the plastic pipe and the silicon photocell sensor;

the analysis circuit board is fixed on the quantitative device top cover and is electrically connected with the LED light source and the silicon photocell sensor.

Further, the LED mounting groove on the quantifying device support is in a semi-circular arc shape, the semi-circular arc-shaped LED mounting groove is also formed in the corresponding position of the quantifying device top cover, and when the quantifying device top cover and the quantifying device support are tightly attached, the two semi-circular arc-shaped LED mounting grooves just form the accommodating space of the LED light source.

Furthermore, the top cover of the quantifying device is also provided with a mounting elongated mounting groove, and after the top cover of the quantifying device and the bracket of the quantifying device are tightly attached, the top cover of the quantifying device and the mounting positioning groove of the sensor just form a space for accommodating the silicon photocell sensor.

Further, the plastic pipe is made of an acid-resistant and corrosion-resistant material.

The utility model has the advantages as follows:

the utility model takes the sensitivity of the pipeline matching of the plastic pipe, the LED light source, the silicon photocell sensor and the quantifying device as the core, and finally realizes the accurate and sensitive liquid level detection by the acquisition and processing of the signal through the analysis circuit; the difficulty of pipeline connection is reduced, the operation is simple, and the reliability is high.

Drawings

Fig. 1 is a schematic view of an assembly structure of a dual-level metering unit according to the present invention;

FIG. 2 is a detail view of the dosing assembly holder;

FIG. 3 is a detail view of the top cover of the dosing assembly;

fig. 4 is two cross-sectional views of the dual level gauge unit after assembly.

In the figure, an analysis circuit board 1, a plastic tube 2, a quantifying device bracket 3, a silicon photocell sensor 4, an LED light source 5, a first strip-shaped slit 6, a second strip-shaped slit 7, a quantifying device top cover 8 and a strip-shaped bulge 801.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the present invention will become more apparent, and it should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

As shown in fig. 1 to 4, the dual-liquid-level metering unit of the present invention comprises a dosing device bracket 3, a dosing device top cover 8, two LED light sources 5, two silicon photocell sensors 4, a plastic tube 2, and an analysis circuit board 1, wherein the dosing device bracket 3 is provided with two parallel LED mounting grooves, and a plastic tube mounting through hole and a sensor mounting positioning groove which are arranged perpendicular to the LED mounting grooves; plastic tubing installation through hole is located LED mounting groove and sensor installation constant head tank between, set up an LED light source 5 in every LED mounting groove, plastic tubing 2 is installed in plastic tubing installation through hole, two silicon photocell sensors 4 all set up in sensor installation constant head tank, and every silicon photocell sensor 4 corresponds an LED light source 5, and the light beam of every LED light source 5 outgoing can be received by the silicon photocell sensor 4 that corresponds.

The quantifying device top cover 8 is buckled on the quantifying device support 3, two strip-shaped bulges 801 are arranged at the position, corresponding to the plastic pipe 2, of the quantifying device top cover 8, so that after the quantifying device top cover 8 and the quantifying device support 3 are buckled, a first strip-shaped slit 6 is formed on one side, close to the LED light source 5, of the plastic pipe 2, and a second strip-shaped slit 7 is formed between the plastic pipe 2 and the silicon photocell sensor 4. The analysis circuit board 1 is fixed on the top cover 8 of the quantitative device and is electrically connected with the LED light source 5 and the silicon photocell sensor 4.

The utility model discloses a two liquid level measurement unit's theory of operation as follows:

the LED light source 5 sends infrared ray, forms the rectangle light beam in 6 departments of first rectangular shape slit, and the stray light is eliminated to rethread second rectangular shape slit 7 after the rectangle light beam passes through plastic tubing 2 and refracts (even there is little drop in the plastic tubing 2, because inside drop in diameter is generally less than 1cm, incident light can not be refracted completely, simultaneously the utility model discloses have 2 way light channels), get into silicon photocell sensor 4 at last, produce current signal after silicon photocell sensor 4 receives the optical signal, gather by analysis circuit board 1 and enlarge. When no liquid exists in the plastic tube 2, the light beam is refracted by the plastic tube 2, enters the second elongated slit 7 and then enters the silicon photocell sensor 4. When the liquid reaches the leftmost end of the second elongated slit 7 along the plastic tube, the light beam in the plastic tube is refracted by the plastic tube 2 and then further refracted by the liquid in the plastic tube 2, the emergent light beam is refracted to the lower part of the second elongated slit 7, the emergent light beam is completely shielded by the second elongated slit 7, so that the emergent light beam cannot reach the silicon photocell sensor 4, no current is generated by the silicon photocell sensor 4, and no voltage is output by the analysis circuit board 1.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention and is not intended to limit the invention, and although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof. All modifications and equivalents made within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (4)

1. A double-liquid-level metering unit is characterized by comprising a quantifying device support (3), a quantifying device top cover (8), two silicon photocell sensors (4), two LED light sources (5), a plastic pipe (2) and an analysis circuit board (1), wherein the quantifying device support (3) is provided with two parallel LED mounting grooves, and a plastic pipe mounting through hole and a sensor mounting positioning groove which are vertically arranged with the LED mounting grooves; the plastic pipe mounting through hole is positioned between the LED mounting groove and the sensor mounting positioning groove, an LED light source is arranged in each LED mounting groove, the plastic pipe (2) is mounted in the plastic pipe mounting through hole, the two silicon photocell sensors (4) are both arranged in the sensor mounting positioning groove, each silicon photocell sensor (4) corresponds to one LED light source (5), and light beams emitted by each LED light source (5) can be received by the corresponding silicon photocell sensor (4);

the quantitative device top cover (8) is buckled on the quantitative device bracket (3), two strip-shaped bulges are arranged at the position of the quantitative device top cover (8) corresponding to the plastic pipe (2), so that after the quantitative device top cover (8) is buckled with the quantitative device bracket (3), a first strip-shaped slit (6) is formed at one side of the plastic pipe (2) close to the LED light source (5), and a second strip-shaped slit (7) is formed between the plastic pipe (2) and the silicon photocell sensor (4);

the analysis circuit board (1) is fixed on the quantifying device top cover (8) and is electrically connected with the LED light source (5) and the silicon photocell sensor (4).

2. The dual-liquid-level metering unit according to claim 1, wherein the LED mounting groove on the dosing device holder (3) is semi-circular arc-shaped, the corresponding position of the dosing device top cover (8) is also provided with a semi-circular arc-shaped LED mounting groove, and when the dosing device top cover (8) and the dosing device holder (3) are tightly attached, the two semi-circular arc-shaped LED mounting grooves just form a containing space for the LED light source (5).

3. The dual level gauging unit according to claim 2, wherein said dosing unit top cover (8) further defines an installation slot for receiving a linear mounting slot, and when said dosing unit top cover (8) and said dosing unit support (3) are tightly attached, said top cover and said sensor installation slot together define a space for receiving said silicon photocell sensor (4).

4. The double level gauging unit according to claim 1, wherein said plastic tube (2) is made of an acid and corrosion resistant material.

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