CN103267556A - Capacitance type liquid level interface measuring meter - Google Patents
Capacitance type liquid level interface measuring meter Download PDFInfo
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- CN103267556A CN103267556A CN2013101760125A CN201310176012A CN103267556A CN 103267556 A CN103267556 A CN 103267556A CN 2013101760125 A CN2013101760125 A CN 2013101760125A CN 201310176012 A CN201310176012 A CN 201310176012A CN 103267556 A CN103267556 A CN 103267556A
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- liquid level
- capacitance type
- type liquid
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- balance cover
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Abstract
The invention discloses a capacitance type liquid level interface measuring meter which comprises a liquid level transmitter, wherein a probe and a sensitive part of the liquid level transmitter are installed on a balancing cover (2) and connected with a relay box (4) through guide wires. The capacitance type liquid level interface measuring meter can float on the interface of two media to measure the position information of the interface, is wide in using range, can be used in special occasions with high-temperature, sticky and corrosive media, and can be widely used in industries of petroleum, chemical engineering, metallurgy, wine making, water conservancy and hydropower and the like.
Description
Technical field
The present invention relates to a kind of float-ball type fluid level transmitter.
Background technology
In commercial production, often need carry out real-time measurement to the interface location of two media, the problem of the control that affects production run or engineering construction process that the measurement of interface location is direct or indirect under many circumstances, quality and safety is so have very important meaning to the measurement at interface.Present stage, the method to interface level measurement had supercritical ultrasonics technology, rays method, electromagnetic method, optical method etc., but these measuring methods are not that influenced by light and measurand color bigger, exactly the not degree of dissolving each other of two media are had relatively high expectations.
Summary of the invention
The technical problem to be solved in the present invention: have the problem of above-mentioned restriction at the method for present measurement two media interface location, designed a kind of capacitance type liquid level interphase measuring instrument.
Technical solution of the present invention:
A kind of capacitance type liquid level interphase measuring instrument comprises fluid level transmitter, and the rapier of fluid level transmitter and sensing unit are installed on the balance cover, are connected with repeater box by lead.
The balance cover is positioned at protective cover inside, and protective cover is the column engraved structure.
The balance cover connects connecting pipe, and connecting pipe is with wrapped in wire.
The balance cover is casing or the sphere structure of a sealing, and is provided with sealable opening.
Rapier is installed in balance cover upper surface, and sensing unit is installed in balance cover inside, and rapier is connected by connecting pipe with sensing unit.
Beneficial effect of the present invention:
1. because the balance cover is hollow-core construction, can adjust the density of whole balance cover by the quality of regulating its inside stuffing, the density of balance cover is adjusted between two media density to be measured, the balance cover just can float on the interphase of two media like this, measure the pressure that it is subjected to by the fluid level transmitter rapier rapier that is installed on the balance cover, be converted into voltage signal through sensing unit, the final processing obtains the thickness of top dielectric after lead is delivered to repeater box, thereby obtains interfacial positional information.This device can convert the variation of various things position parameter to normalized current signal, teletransmission to operating the pulpit, carries out centralized displaying, warning or control automatically for secondary table or computer installation.
2. on the design's sensing unit stable equilibrium cover inside, rapier links to each other by connecting pipe with sensitivity, the pressure of liquid passes to sensing unit by connecting pipe indirectly by the conduction of air, so just avoid responsive portion device to contact with the direct of measured medium, avoid liquid to corrosion and the interference of inner components and parts.The usable range of this device measuring is wide, can be used for the special occasions of media such as high temperature, thickness, corrosion, can be widely used in the industries such as oil, chemical industry, metallurgy, wine brewing, water conservancy and hydropower.
3. the effect of protective cover is to make balance cover interior movement of vertical scope of portion within it, has the column engraved structure, and such structure can guarantee that liquid flows into protective cover inside smoothly.
Description of drawings:
Fig. 1 is structural representation of the present invention.
Embodiment:
This device for mechanical part is made up of four parts, and the effect of protective cover 1 is to make balance cover 2 interior movement of vertical scope of portion within it, has the column engraved structure, and such structure can guarantee that liquid flows into protective cover inside smoothly; Balance cover 2 is body structures of a sealing, higher density solution is equipped with in inside, the bottom of casing has sealable opening, the density that the amount of the solution by regulating box house is regulated casing, the density of whole box body is between upper liquid and the next liquid, so just can guarantee that whole balance cover is positioned at the interphase place of two kinds of liquid, the rapier that is installed on protective cover 2 tops just can be collected the pressure of upper liquid.Sensing unit is equipped with in balance cover 2 inside, rapier is connected by connecting pipe with sensing unit, the pressure of liquid passes to sensing unit by wireway indirectly by the conduction of air, so just avoid responsive portion device to contact with the direct of measured medium, so just increased the usable range of device measuring, because whole balance cover is the device of a sealing, measured liquid and inner original paper are isolated, can avoid liquid to corrosion and the interference of inner components and parts.Finish the rectification to signal, the rough handling of amplification here.Connecting pipe 3 is connected with balance cover 2, voltage signal through preliminary rectification and amplification, lead by 3 li of connecting pipes passes to repeater box 4, when solution has corrosivity, can increase the length of connecting pipe 3, make repeater box 4 away from upper liquid, finish processing and conversion to voltage signal in repeater box 4, finally convert the current signal that host computer can be identified to, connecting pipe 3 tops link to each other with repeater box 4, the bottom links to each other with balance cover 2, and two parts all use bolt to connect.
Principle of work:
At first the density of adjustment cover 2 makes it just between the centre of last the next fluid density, and when putting into balance cover 2 in the liquid, balance cover 2 is positioned at two kinds of liquid interface places, and rapier (pressure transducer) through the pressure that connecting pipe is subjected to is
P=9.807ρH+P
0
P-sensor experience pressure, the kPa of unit
ρ-liquid level density, the g/cm of unit
The height of H-upper liquid, the m of unit
P
0Pressure on the-liquid level, the kPa of unit
Be communicated with liquid level top as if chamber, the sensor back side, then P
0Be zero, so H approximates 0.102P/ ρ, the transmitter that is installed in balance residence inside converts the pressure signal of experiencing to electric signal, and this signal is directly proportional with liquid level.
The measuring principle of capacitive sensing with the height change of measured medium submergence rapier, reflects the variation of induction frequencies, through circuit conversion 4～20m A current signal output of correspondence with it.
Claims (5)
1. a capacitance type liquid level interphase measuring instrument comprises fluid level transmitter, it is characterized in that: the rapier of fluid level transmitter and sensing unit are installed on the balance cover (2), are connected with repeater box (4) by lead.
2. capacitance type liquid level interphase measuring instrument according to claim 1, it is characterized in that: balance cover (2) is positioned at protective cover (1) inside, and protective cover (1) is the column engraved structure.
3. capacitance type liquid level interphase measuring instrument according to claim 1 is characterized in that: balance cover (2) connects connecting pipe (3), and connecting pipe (3) is with wrapped in wire.
4. capacitance type liquid level interphase measuring instrument according to claim 1, it is characterized in that: balance cover (2) is casing or the sphere structure of a sealing, and is provided with sealable opening.
5. capacitance type liquid level interphase measuring instrument according to claim 1, it is characterized in that: rapier is installed in balance cover (2) upper surface, and sensing unit is installed in balance cover (2) inside, and rapier is connected by connecting pipe with sensing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101760125A CN103267556A (en) | 2013-05-14 | 2013-05-14 | Capacitance type liquid level interface measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101760125A CN103267556A (en) | 2013-05-14 | 2013-05-14 | Capacitance type liquid level interface measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103267556A true CN103267556A (en) | 2013-08-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101760125A Pending CN103267556A (en) | 2013-05-14 | 2013-05-14 | Capacitance type liquid level interface measuring meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN103267556A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928825A (en) * | 2016-04-18 | 2016-09-07 | 张立臣 | Portable instrument for detecting liquid level and density of medium |
| CN106840308A (en) * | 2017-03-23 | 2017-06-13 | 大庆市镁龙测控技术有限公司 | Gradual change type detector for oil-water interface |
| CN114199313A (en) * | 2021-12-20 | 2022-03-18 | 上海铭控传感技术有限公司 | Input type liquid measuring system and measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099958U (en) * | 1991-06-28 | 1992-03-25 | 朴顺姬 | Differential pressure sensor for automatic control of interface of liquid oils with water |
| CN2225023Y (en) * | 1995-05-10 | 1996-04-17 | 段祥照 | Liquid level sensor for testing corrosive media |
| CN102103003A (en) * | 2009-12-21 | 2011-06-22 | 天津市鑫成仪表有限公司 | Direct liquid level boundary indicator |
| CN102252731A (en) * | 2011-05-09 | 2011-11-23 | 中昊晨光化工研究院 | Device and method for measuring interface of medium in container |
| KR101168196B1 (en) * | 2012-03-07 | 2012-07-25 | 주식회사 마르센 | Oil/water interface detector capable of storage tank inside pressure measurement |
-
2013
- 2013-05-14 CN CN2013101760125A patent/CN103267556A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099958U (en) * | 1991-06-28 | 1992-03-25 | 朴顺姬 | Differential pressure sensor for automatic control of interface of liquid oils with water |
| CN2225023Y (en) * | 1995-05-10 | 1996-04-17 | 段祥照 | Liquid level sensor for testing corrosive media |
| CN102103003A (en) * | 2009-12-21 | 2011-06-22 | 天津市鑫成仪表有限公司 | Direct liquid level boundary indicator |
| CN102252731A (en) * | 2011-05-09 | 2011-11-23 | 中昊晨光化工研究院 | Device and method for measuring interface of medium in container |
| KR101168196B1 (en) * | 2012-03-07 | 2012-07-25 | 주식회사 마르센 | Oil/water interface detector capable of storage tank inside pressure measurement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928825A (en) * | 2016-04-18 | 2016-09-07 | 张立臣 | Portable instrument for detecting liquid level and density of medium |
| CN106840308A (en) * | 2017-03-23 | 2017-06-13 | 大庆市镁龙测控技术有限公司 | Gradual change type detector for oil-water interface |
| CN114199313A (en) * | 2021-12-20 | 2022-03-18 | 上海铭控传感技术有限公司 | Input type liquid measuring system and measuring method |
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Application publication date: 20130828 |