CN108375407A - A kind of LNG locomotives magnetic floating liquid level gauge - Google Patents
A kind of LNG locomotives magnetic floating liquid level gauge Download PDFInfo
- Publication number
- CN108375407A CN108375407A CN201810147060.4A CN201810147060A CN108375407A CN 108375407 A CN108375407 A CN 108375407A CN 201810147060 A CN201810147060 A CN 201810147060A CN 108375407 A CN108375407 A CN 108375407A
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- China
- Prior art keywords
- floating drum
- upper cover
- cover plate
- magnetic
- liquid level
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The present invention relates to a kind of LNG locomotives magnetic floating liquid level gauge, solve the problems, such as that existing LNG liquid levels cause level gauging result to have relatively large deviation using measurement by capacitance method.Liquid level gauge includes magnetic float, interior floating drum, outer floating drum, signal extracting circuit printed board, hermetic terminal, the first upper cover plate, the second upper cover plate, cable, converter and pedestal；Magnetic float includes shell and magnet steel, and magnet steel is embedded in the housing；Signal extracting circuit is provided in signal extracting circuit printed board, signal extracting circuit printed board is arranged inside interior floating drum, and interior floating drum is arranged inside outer floating drum, and magnetic float is arranged between interior floating drum and outer floating drum；Signal extracting circuit printed board is fixedly installed the first upper cover plate by cable connection to converter, the top of interior floating drum, and one end of cable is provided with hermetic terminal, and one end of hermetic terminal is provided with the second upper cover plate, and the first upper cover plate and the second upper cover plate are fixedly connected；Pedestal is located at interior floating drum, outer floating drum bottom end.
Description
Technical field
The present invention relates to liquid level gauge fields, and in particular to it is low to can be used for LNG etc. for a kind of LNG locomotives magnetic floating liquid level gauge
The level gauging of warm medium, the level gauging being equally applicable under the conditions of general environment.
Background technology
Developing direction of the LNG (liquified natural gas) as natural gas future, in bus and heavy truck power supply side
Face has been shown up prominently, however the reliability and stability problem of quiet, the dynamic test of vehicle-mounted LNG liquid levels at this stage never obtains
It solves well, the serious further development that restrict LNG locomotives.Traditional vehicle-mounted LNG level gaugings mostly use condenser type
Measurement method, capacitance belong to the electrical parameter that is easily disturbed, and the parasitic capacitance etc. of the vaporization of LNG, lead capacitance and the external world all can
Measurement result is had an impact；The dielectric constant very little of LNG simultaneously, the interference of extraneous very little can all cause larger on level gauging
Deviation.
Invention content
Present invention aim to address existing LNG liquid levels, and using measurement by capacitance method, to cause level gauging result to have larger
The problem of deviation, provides a kind of LNG locomotives magnetic floating liquid level gauge.
Technical proposal that the invention solves the above-mentioned problems is,
A kind of LNG locomotives magnetic floating liquid level gauge, including the printing of magnetic float, interior floating drum, outer floating drum, signal extracting circuit
Plate, hermetic terminal, the first upper cover plate, the second upper cover plate, cable, converter and pedestal；The magnetic float includes shell and magnet steel,
The shell is sleeve-like configuration, and the magnet steel is embedded in the housing；It is provided with signal in the signal extracting circuit printed board
Circuit is extracted, signal extracting circuit constitutes calculation matrix by multiple reed switch and multiple resistance, and reed switch is floating according to magnetic
The position open or close of son, makes resistance change；The signal extracting circuit printed board is arranged inside interior floating drum, interior floating drum
It is arranged inside outer floating drum, magnetic float is arranged between interior floating drum and outer floating drum, for driving and the tongue of float equivalent locations
Switch；The signal extracting circuit printed board is fixedly installed by cable connection to converter, the top of the interior floating drum
One end of one upper cover plate, the cable is provided with hermetic terminal, and one end of the hermetic terminal is provided with the second upper cover plate, described
First upper cover plate and the second upper cover plate are fixedly connected；The pedestal is located at interior floating drum, outer floating drum bottom end, and respectively with interior floating drum,
Outer floating drum is fixedly connected, and the pedestal is provided with the liquid-passing hole that cavity is connected between interior floating drum, outer floating drum.
Further, the bottom end of the interior floating drum is provided with damping ring, and the damping ring is fixedly connected with pedestal.
Further, the signal extracting circuit constitutes calculation matrix by multiple reed switch and multiple resistance, multiple
Resistance is sequentially connected in series, and one end of multiple reed switch is and VCCConnection, the other end connect between the resistances.
Further, it is provided with sealing ring between first upper cover plate and the second upper cover plate.
Further, the top of the outer floating drum is fixedly installed footstock.
Further, the interior floating drum, outer floating drum are austenitic stainless steel floating drum.
Further, the pedestal is welded and fixed with interior floating drum, outer floating drum respectively.
Further, the magnetic float shell is made of high polymeric compound PET.
Beneficial effects of the present invention are：
1. repeatability of the invention, the linearity are good, using maglev type measuring principle, pass through low temperature resistant low density non-metallic magnetic
Float coordinates the unique designs such as coaxial twin float structure, priority criteria current output circuit in high precision, avoids parasitic electricity
The influence of the disturbing factors such as appearance, vibration, solves the unstable technical barrier of low temperature, low density liquid level gauging, and successfully
Long-time, the verification examination of the function under ultralow temperature (liquid nitrogen, -196 DEG C) environment, performance test are passed through, entire liquid level was tested
It is not in the presence of breakpoint, dead zone, there is preferable reliability and stability in journey.
2. magnetic floating liquid level gauge of the present invention is based on magnetic coupling operation principle, it can really reflect liquid level to be measured, while by outer
The influence very little of boundary's environment, suitable for vehicle-mounted LNG low temperature, the measuring environment of pressurization.
Description of the drawings
Fig. 1 is the structure chart of LNG locomotive magnetic floating liquid level gauges of the embodiment of the present invention；
Fig. 2 is the magnetic Floater Structure figure of LNG locomotive magnetic floating liquid level gauges of the embodiment of the present invention；
Fig. 3 is the signal extracting circuit schematic diagram of LNG locomotive magnetic floating liquid level gauges of the embodiment of the present invention.
Reference numeral：1- magnetic floats, floating drum in 2-, the outer floating drums of 3-, 4- damping rings, 5- pedestals, 6- signal extracting circuits print
Making sheet, the first upper cover plates of 7-, the second upper cover plates of 8-, 9- hermetic terminals, 10- cables, 11- footstocks, 12- converters；21- shells,
22- magnet steel.
Specific implementation mode
Present disclosure is described in further detail below in conjunction with the drawings and specific embodiments：
LNG locomotive magnetic floating liquid level gauges as shown in Figure 1 and Figure 2, including magnetic float 1, interior floating drum 2, outer floating drum 3, signal
Extract circuit printing plate 6, hermetic terminal 9, the first upper cover plate 7, the second upper cover plate 8, cable 10, converter 12 and pedestal 5；Magnetic is floating
Son 1 includes shell 21 and magnet steel 22, and shell 21 is sleeve-like configuration, and magnet steel 22 is embedded in shell 21；Signal extracting circuit prints
Signal extracting circuit is provided in making sheet 6, signal extracting circuit is constituted using multiple low temperature resistant reed switch and multiple resistance and surveyed
Moment matrix, signal extracting circuit printed board 6 are arranged inside interior floating drum 2, and interior floating drum 2 is arranged inside outer floating drum 3, magnetic float 1
It is arranged between interior floating drum 2 and outer floating drum 3, for driving and the reed switch of float equivalent locations；Signal extracting circuit is printed
Plate 6 is connected to converter 12 by cable 10, and is sealed by hermetic terminal 9, and the top of interior floating drum 2 is fixedly installed on first
One end of cover board 7, cable 10 is provided with hermetic terminal 9, and one end of hermetic terminal 9 is provided with the second upper cover plate 8, the first upper cover plate
7 are fixedly connected with the second upper cover plate 8, and are provided with sealing ring between the first upper cover plate 7 and the second upper cover plate 8；Pedestal 5 is located at interior
Floating drum 2,3 bottom end of outer floating drum, and be welded to connect respectively with interior floating drum 2, outer floating drum 3, pedestal 5 is provided with and interior floating drum 2, outer floating drum
The liquid-passing hole that cavity is connected between 3.
The bottom end of interior floating drum 2 is provided with damping ring 4, and damping ring 4 is fixedly connected with pedestal 5, for the aneroid to magnetic float 1
To buffering when falling when body；The top of outer floating drum 3 is fixedly installed footstock 11；Interior floating drum 2, outer floating drum 3 are austenite stainless
Steel floating drum；1 shell 21 of magnetic float is made of high polymeric compound PET.
As shown in figure 3, signal extracting circuit constitutes calculation matrix, reed switch root using low temperature resistant reed switch and resistance
According to the position open or close of magnetic float 1, to the roads Shi Gai resistance variations；Converter 12 is converted according to the variation of front end resistance value
For corresponding curent change, to realize the measurement of liquid level；Specially multiple resistance are sequentially connected in series, one end of multiple reed switch
And VCCConnection, the other end connect between the resistances, and reed switch and resistance form series-parallel circuit, corresponding by switching
Reed switch change output loop resistance, specifically by VCCConstant current-supplying, resistance variations lead to VCCThe voltage change at end,
Measure VCCThe voltage at end can inverse liquid level variation.
The connection of electric signal is：Signal extracting circuit printed board 6 is transferred by cable 10, and subsequent sealed terminal 9 seals,
It is connected to converter 12, realizes the output of electric signal.
The float of magnetic floating liquid level gauge embeds permanent-magnet steel 22, and magnetic float 1 floats with the variation of liquid level, driving be mounted on
The reed switch of float equivalent locations；Protection of the inside and outside floating drum for signal extracting circuit and magnetic float 1；Converter 12 should
Switching signal is converted to corresponding liquid level signal, and current level is indicated by liquid level display.
Magnetic float 1 is the core of magnetic floating liquid level gauge, the variation for perceiving and transmitting liquid level, using low-density, resistance to low
The high polymeric compound PET of temperature embeds high remanent magnetism permanent-magnet steel 22 and is made；Suitable for -163 DEG C of low temperature environments, floatability exists
Density is about in 0.4~0.5g/cm3LNG liquid.
Magnetic levitation type liquid level measure basic principle be：Liquid level gauge is placed in testing liquid when work, and magnetic float 1 is with prepare liquid
It floats up and down in body fluid face；Magnetic float 1 embeds permanent-magnet steel 22, and beside magnetic float 1 is a series of tongue of different heights
Spring switchs, and when magnetic float 1 floats to certain position, magnetic fields reed switch at this enables its closure, to the roads Shi Gai electricity
Resistive；Converter 12 is converted to corresponding curent change according to the variation of front end resistance value, to realize the measurement of liquid level.
Specifically a kind of nonmetallic magnetic float 1 that can be used for LNG low temperature, low density liquid environment of liquid level gauge of the present invention, tool
It is standby to bear the ability of cryogenic liquid environment, while the coaxial twin float magnetic float 1 for being aided with high-precision cooperation is protected and anti-vibration is dry
Overall structure is disturbed, the design of priority criteria current output circuit avoids the influence of the disturbing factors such as parasitic capacitance, vibration,
Solve the problems, such as LNG level gaugings.
Claims (8)
1. a kind of LNG locomotives magnetic floating liquid level gauge, it is characterised in that：Including magnetic float (1), interior floating drum (2), outer floating drum (3),
Signal extracting circuit printed board (6), hermetic terminal (9), the first upper cover plate (7), the second upper cover plate (8), cable (10), converter
(12) and pedestal (5)；
The magnetic float (1) includes shell (21) and magnet steel (22), and the shell (21) is sleeve-like configuration, the magnet steel (22)
It is embedded in shell (21)；
It is provided with signal extracting circuit on the signal extracting circuit printed board (6), the signal extracting circuit passes through multiple tongues
Spring switchs and multiple resistance constitute calculation matrix, and reed switch makes resistance value become according to the position open or close of magnetic float (1)
Change；Signal extracting circuit printed board (6) setting is internal in interior floating drum (2), and the interior floating drum (2) is arranged in outer floating drum (3)
Inside, magnetic float (1) is arranged between interior floating drum (2) and outer floating drum (3), for driving the tongue with float equivalent locations to open
It closes；
The signal extracting circuit printed board (6) is connected to converter (12), the top of the interior floating drum (2) by cable (10)
It is fixedly installed the first upper cover plate (7), one end of the cable (10) is provided with hermetic terminal (9), the hermetic terminal (9)
One end is provided with the second upper cover plate (8), and first upper cover plate (7) is fixedly connected with the second upper cover plate (8)；
The pedestal (5) is located at interior floating drum (2), outer floating drum (3) bottom end, and fixes connect with interior floating drum (2), outer floating drum (3) respectively
It connects, the pedestal (5) is provided with the liquid-passing hole that cavity is connected between interior floating drum (2), outer floating drum (3).
2. LNG locomotives magnetic floating liquid level gauge according to claim 1, it is characterised in that：The bottom end of the interior floating drum (2)
It is provided with damping ring (4), the damping ring (4) is fixedly connected with pedestal (5).
3. LNG locomotives magnetic floating liquid level gauge according to claim 1 or 2, it is characterised in that：The signal extracting circuit
In multiple resistance be sequentially connected in series, one end of multiple reed switch with power supply VCCConnection, the other end be connected to two resistance it
Between.
4. LNG locomotives magnetic floating liquid level gauge according to claim 3, it is characterised in that：First upper cover plate (7) and
Second upper cover plate is provided with sealing ring between (8).
5. LNG locomotives magnetic floating liquid level gauge according to claim 4, it is characterised in that：The top of the outer floating drum (3)
It is fixedly installed footstock (11).
6. LNG locomotives magnetic floating liquid level gauge according to claim 5, it is characterised in that：It is the interior floating drum (2), outer floating
Cylinder (3) is austenitic stainless steel floating drum.
7. LNG locomotives magnetic floating liquid level gauge according to claim 6, it is characterised in that：The pedestal (5) respectively with it is interior
Floating drum (2), outer floating drum (3) are welded and fixed.
8. LNG locomotives magnetic floating liquid level gauge according to claim 7, it is characterised in that：The magnetic float shell (21)
It is made of high polymeric compound PET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147060.4A CN108375407A (en) | 2018-02-12 | 2018-02-12 | A kind of LNG locomotives magnetic floating liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147060.4A CN108375407A (en) | 2018-02-12 | 2018-02-12 | A kind of LNG locomotives magnetic floating liquid level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108375407A true CN108375407A (en) | 2018-08-07 |
Family
ID=63017921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810147060.4A Pending CN108375407A (en) | 2018-02-12 | 2018-02-12 | A kind of LNG locomotives magnetic floating liquid level gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108375407A (en) |
Citations (11)
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| US3976963A (en) * | 1974-04-19 | 1976-08-24 | Heinrich Kubler | Transducer for a path tracer |
| US4627283A (en) * | 1985-08-13 | 1986-12-09 | Tsuchiya Co., Ltd. | Fuel level detector for automobile fuel tank |
| JP2001091341A (en) * | 1999-09-24 | 2001-04-06 | Yamaha Livingtec Corp | Liquid level detector |
| CN2729661Y (en) * | 2004-03-23 | 2005-09-28 | 东莞正扬电子机械有限公司 | Wate level sensor for sewage tank |
| CN2864624Y (en) * | 2005-05-11 | 2007-01-31 | 姜亦庆 | Pipe column fuel-oil sensor |
| CN101535783A (en) * | 2006-10-16 | 2009-09-16 | 普里科有限公司 | Fuel sender with reed switch and latching magnets |
| CN201438127U (en) * | 2009-07-01 | 2010-04-14 | 廊坊市轩慧电视安装服务有限公司 | Precise liquid level sensor |
| CN201575847U (en) * | 2009-12-25 | 2010-09-08 | 上海黄河仪器仪表厂有限公司 | Oil mass sensor |
| CN102607673A (en) * | 2012-04-07 | 2012-07-25 | 无锡隆盛科技有限公司 | Sensor measuring liquid level position |
| CN204988442U (en) * | 2015-07-29 | 2016-01-20 | 黄山市华兴汽车仪表厂 | Drum formula magnetoelectric level sensor |
| CN106124005A (en) * | 2016-08-18 | 2016-11-16 | 四川泛华航空仪表电器有限公司 | The anti-interference BL of resistance-strain type |
-
2018
- 2018-02-12 CN CN201810147060.4A patent/CN108375407A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976963A (en) * | 1974-04-19 | 1976-08-24 | Heinrich Kubler | Transducer for a path tracer |
| US4627283A (en) * | 1985-08-13 | 1986-12-09 | Tsuchiya Co., Ltd. | Fuel level detector for automobile fuel tank |
| JP2001091341A (en) * | 1999-09-24 | 2001-04-06 | Yamaha Livingtec Corp | Liquid level detector |
| CN2729661Y (en) * | 2004-03-23 | 2005-09-28 | 东莞正扬电子机械有限公司 | Wate level sensor for sewage tank |
| CN2864624Y (en) * | 2005-05-11 | 2007-01-31 | 姜亦庆 | Pipe column fuel-oil sensor |
| CN101535783A (en) * | 2006-10-16 | 2009-09-16 | 普里科有限公司 | Fuel sender with reed switch and latching magnets |
| CN201438127U (en) * | 2009-07-01 | 2010-04-14 | 廊坊市轩慧电视安装服务有限公司 | Precise liquid level sensor |
| CN201575847U (en) * | 2009-12-25 | 2010-09-08 | 上海黄河仪器仪表厂有限公司 | Oil mass sensor |
| CN102607673A (en) * | 2012-04-07 | 2012-07-25 | 无锡隆盛科技有限公司 | Sensor measuring liquid level position |
| CN204988442U (en) * | 2015-07-29 | 2016-01-20 | 黄山市华兴汽车仪表厂 | Drum formula magnetoelectric level sensor |
| CN106124005A (en) * | 2016-08-18 | 2016-11-16 | 四川泛华航空仪表电器有限公司 | The anti-interference BL of resistance-strain type |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180807 |
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| RJ01 | Rejection of invention patent application after publication |