CN213021815U

CN213021815U - Conductive medium level detection device

Info

Publication number: CN213021815U
Application number: CN202022209827.7U
Authority: CN
Inventors: 殷银华; 钟胜; 陈祁; 彭祥禹; 杨洪; 蒋超
Original assignee: Hubei Sanning Chemical Co Ltd
Current assignee: Hubei Sanning Chemical Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-04-20
Anticipated expiration: 2030-09-30

Abstract

A conductive medium level detection device is characterized in that: the device comprises a measured container, a plurality of electrodes are sequentially arranged in the vertical direction of the measured container, a material level sensing electrode is arranged in the measured container, the electrodes and the material level sensing electrode are electrically connected with a field control box, field material level lamps corresponding to the number of the electrodes are arranged on the field control box, the field control box is connected with a working power supply, and the shell of the measured container and the cathode of the working power supply are connected with a ground wire. Through set up the electrode on being surveyed the container, the electric conductivity that utilizes the medium of being surveyed makes different scene level lamps light or extinguish according to the liquid level difference and indicates the liquid level, simultaneously through the analog quantity circuit after spreading into the rectification with the resistance of medium, carries the analog quantity value to the DCS host computer, can show real-time liquid level height on the DCS host computer.

Description

Conductive medium level detection device

Technical Field

The utility model relates to a level measurement technical field, especially a conductive medium level detection device.

Background

In industrial production, the material height measuring device is generally applied to various projects. Depending on the measurement type, conventional level gauges include differential level gauges, capacitive level gauges, and radar level gauges, which are suitable for different measurement environments. The level measuring device has certain limitations for measuring the level of a medium which is easy to crystallize, easy to block, poor in circulation, complex in internal structure of a container and in a limited environment with the upper part and the lower part communicated with the container. For example, when the differential pressure type level meter is used for measuring the level height of a medium which is easy to crystallize and block, a root valve and a measuring pipeline of a measured container are easy to block, so that the measured data is distorted, and the production is influenced; a medium which is easy to crystallize and has poor liquidity is easy to generate a wall hanging phenomenon on a measuring electrode of the capacitance level meter, and a measuring error is generated on a sensitive capacitance, so that the level cannot be truly reflected; radar level gauges have great advantages for measuring media that are prone to crystallization, clogging and poor flow, but their use is limited to a certain extent if the interior of the tank cannot provide a through-going measurement. Therefore, the technical problem to be solved by the technical personnel in the field is urgently needed to provide a device for detecting the level of a conductive medium, which is suitable for the environment that the internal structure of a container is complex, the vertical connectivity is poor, the medium is easy to crystallize, easy to block and poor in circulation.

Disclosure of Invention

The utility model aims to solve the technical problem that a conductive medium level detection device is provided, specially adapted container inner structure is complicated, the connectivity is poor from top to bottom, the easy crystallization of medium, easy jam, the poor environment of circulation.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a conducting medium level detection device comprises a detected container, a plurality of electrodes are sequentially arranged in the vertical direction of the detected container, a level sensing electrode is arranged in the detected container, the electrodes and the level sensing electrode are electrically connected with a field control box, field level lamps corresponding to the number of the electrodes are arranged on the field control box, the field control box is connected with a working power supply, and the shell of the detected container and the cathode of the working power supply are connected with a ground wire.

The field control box is electrically connected with the analog quantity transducer, and the analog quantity transducer is electrically and mechanically connected with a DCS.

Each electrode, a field level lamp and a measured medium form a level indicating circuit, and the anode of the level lamp is connected with the anode of the output of the working power supply.

The level sensing electrode is positioned at the bottom of the container to be detected, and the vertical position of the level sensing electrode is not higher than that of the lowest electrode.

The analog quantity transducer is connected with the material level sensing electrode through the field control box, and the shell of the measured container, the measured medium and the material level sensing electrode form a rheostat with the measured medium as a resistance variable.

The analog quantity transducer comprises a rectifier and a current-limiting resistor, wherein the input end of the rectifier is connected with a working power supply, the current-limiting resistor is connected with the rheostat in series, the two ends of a series loop are connected with the positive electrode and the negative electrode of the output end of the rectifier, and the two ends of the current-limiting resistor are provided with analog quantity leads.

The current limiting resistor is a variable resistor.

The electrode is made of corrosion-resistant conductive metal material, the surface of the electrode is lined with fluorine, the front end of the electrode is contacted with a material, and the electrode and the material are insulated from the container when not contacted.

The utility model provides a pair of conducting medium level detection device, through set up the electrode on being surveyed the container, the electric conductivity that utilizes being surveyed the medium makes the different scene level lamps of messenger light or extinguish according to the liquid level difference and instructs the liquid level, spreads into the analog quantity circuit after the rectification through the resistance with the medium simultaneously, carries the analog quantity to the DCS host computer, can show real-time liquid level height on the DCS host computer, the utility model discloses following beneficial effect has:

1. the accuracy and the stability of the medium level measurement of the medium which is easy to crystallize and block and poor in liquidity are improved.

2. The method has good practicability for the level measurement with complex inner structure and poor up-down connectivity of the container.

3. The installation cost is low, the inspection and maintenance are convenient, and the anti-interference performance is strong.

4. The material level change can be observed simultaneously in the field and the operation room, and the operation is convenient.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of a control circuit of the present invention;

fig. 3 is a schematic diagram of the analog quantity transmitter 5.

In the figure: the system comprises a working power supply 1, a field control box 2, a measured container 3, a field level lamp 4, an analog quantity transducer 5, a rectifier 51, a current limiting resistor 52, a DCS upper computer 6, an electrode 7, a level sensing electrode 8 and a rheostat 9.

Detailed Description

As shown in figure 1, the conductive medium level detection device comprises a detected container 3, a plurality of electrodes 7 are sequentially arranged in the vertical direction of the detected container 3, a level sensing electrode 8 is arranged in the detected container 3, the electrodes 7 and the level sensing electrode 8 are electrically connected with a field control box 2, field level lamps 4 corresponding to the electrodes 7 in number are arranged on the field control box 2, the field control box 2 is connected with a working power supply 1, and the shell of the detected container 3 and the negative electrode of the working power supply 1 are connected with the ground wire.

As shown in fig. 1, the field control box 2 is electrically connected to the analog quantity transducer 5, and the analog quantity transducer 5 is electrically connected to the DCS upper computer 6.

As shown in fig. 1 and 2, each of the plurality of electrodes 7 is connected with a field level lamp 4 and a measured medium composition level indicating circuit, and the positive electrode of the level lamp 4 is connected with the positive output electrode of the working power supply 1; the circuit in fig. 2 represents the case where one path of electrode is connected to the level lamp, the state of the combination of the measured medium and the electrode 7 is closed when the material in the measured container 3 rises to contact the electrode 7-1, and the site level lamp 4-1 is lighted; when the materials in the tested container 3 rise to the contact electrode 7-2, the on-site material level lamps 4-1 and 4-2 are lightened; when the materials in the tested container 3 rise to the contact electrode 7-3, the on-site level lamps 4-1, 4-2 and 4-3 are lightened.

As shown in FIG. 1, the level sensing electrode 8 is located at the bottom of the container 3 under test, and the level sensing electrode 8 is vertically located no higher than the lowest electrode 7.

As shown in fig. 1, the analog quantity transducer 5 is connected with the level sensing electrode 8 through the field control box 2, and the measured container 3 shell, the measured medium and the level sensing electrode 8 form a rheostat 9 with the measured medium as a resistance variable.

As shown in fig. 3, the analog quantity transducer 5 includes a rectifier 51 and a current limiting resistor 52, wherein an input end of the rectifier 51 is connected with the working power supply 1, the current limiting resistor 52 is connected in series with the varistor 9, two ends of the series circuit are connected with an anode and a cathode of an output end of the rectifier 51, and two ends of the current limiting resistor 52 are provided with analog quantity leads.

The current limiting resistor 52 is a variable resistor, and the variable resistor adopts different resistance values according to the conductivity of different media, so that a 4-20mA analog quantity signal can be generated for the resistor with the liquid volume.

The electrode 7 is made of a corrosion-resistant conductive metal material, the surface of the electrode is lined with fluorine, the front end of the electrode 7 is contacted with a material, and the electrode 7 is insulated from the container when not contacted with the material, so that the detection reliability can be ensured.

Claims

1. A conductive medium level detection device is characterized in that: the device comprises a measured container (3), a plurality of electrodes (7) are sequentially arranged in the vertical direction of the measured container (3), a material level sensing electrode (8) is arranged in the measured container (3), the electrodes (7) and the material level sensing electrode (8) are electrically connected with a field control box (2), field material level lamps (4) corresponding to the electrodes (7) in number are arranged on the field control box (2), the field control box (2) is connected with a working power supply (1), and the shell of the measured container (3) and the negative electrode of the working power supply (1) are connected with a ground wire.

2. The apparatus for sensing the level of a conductive medium as in claim 1, wherein: the field control box (2) is electrically connected with the analog quantity transducer (5), and the analog quantity transducer (5) is electrically connected with the DCS upper computer (6).

3. The apparatus for sensing the level of a conductive medium as in claim 1, wherein: each electrode (7) is connected with a site level lamp (4) and a measured medium composition level indicating circuit, and the positive electrode of the level lamp (4) is connected with the output positive electrode of the working power supply (1).

4. A conductive medium level sensing apparatus as defined in claim 3 wherein: the level sensing electrode (8) is positioned at the bottom of the measured container (3), and the vertical position of the level sensing electrode (8) is not higher than the lowest electrode (7).

5. A conductive medium level sensing apparatus as defined in claim 2, wherein: the analog quantity transducer (5) is connected with the level sensing electrode (8) through the field control box (2), and the shell of the measured container (3), the measured medium and the level sensing electrode (8) form a rheostat (9) with the measured medium as a resistance variable.

6. The apparatus for sensing the level of a conductive medium as in claim 5, wherein: the analog quantity transducer (5) comprises a rectifier (51) and a current limiting resistor (52), wherein the input end of the rectifier (51) is connected with the working power supply (1), the current limiting resistor (52) is connected with the rheostat (9) in series, two ends of a series loop are connected with the positive electrode and the negative electrode of the output end of the rectifier (51), and two ends of the current limiting resistor (52) are provided with analog quantity leads.

7. The apparatus for sensing the level of a conductive medium as in claim 6, wherein: the current limiting resistor (52) is a variable resistor.

8. The apparatus for sensing the level of a conductive medium as in claim 1, wherein: the electrode (7) is made of corrosion-resistant conductive metal materials, the surface of the electrode is lined with fluorine, the front end of the electrode (7) is contacted with a material, and the electrode (7) is insulated from the container when not contacted with the material.