CN110081948A - A kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure - Google Patents
A kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure Download PDFInfo
- Publication number
- CN110081948A CN110081948A CN201910436302.6A CN201910436302A CN110081948A CN 110081948 A CN110081948 A CN 110081948A CN 201910436302 A CN201910436302 A CN 201910436302A CN 110081948 A CN110081948 A CN 110081948A
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- Prior art keywords
- liquid
- phase
- tank body
- vacuum insulation
- insulation tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000007791 liquid phase Substances 0.000 title claims abstract description 81
- 238000009413 insulation Methods 0.000 title claims abstract description 27
- 238000009834 vaporization Methods 0.000 title claims abstract description 15
- 230000008016 vaporization Effects 0.000 title claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010079 rubber tapping Methods 0.000 claims abstract description 27
- 238000012546 transfer Methods 0.000 claims abstract description 18
- 238000005452 bending Methods 0.000 claims abstract description 12
- 230000006641 stabilisation Effects 0.000 claims abstract description 12
- 238000011105 stabilization Methods 0.000 claims abstract description 12
- 239000011229 interlayer Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 15
- 239000012071 phase Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- G01F23/14—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 measurement of pressure
Abstract
The invention discloses a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structures, including vacuum insulation tank body, one end of the liquid-phase tube of liquidometer is equipped with liquid-phase tube pressure tappings, vacuum insulation tank body is made of inner pressurd vessel and shell, inner pressurd vessel includes cylinder and end socket, cylinder body bottom is equipped with the current stabilization support plate for fixed liquid phase pipe pressure tappings, current stabilization support plate includes bending part, bending part is equipped with aperture, the liquid-phase tube pressure tappings of liquidometer can pass through the aperture, end socket lower part is equipped with the dual-sided splice through its wall portion, liquid phase pipe outer wall in the vacuum interlayer is wound with heat transfer copper wire, heating column there are two being set at outer casing inner wall, heat-conducting plate is equipped between heating column, the both ends of heat transfer copper wire are wrapped on the heat-conducting plate；This structure main purpose is to solve the problems, such as coexistence of gas and liquid in liquidometer liquid phase pressure pipe, forces and forms single phase gas in pressure pipe, it is ensured that differential pressure levelmeter can normal table work, and realize and accurately measure.
Description
Technical field
The present invention relates to liquidometer pressure field, especially a kind of vacuum insulation tank body is taken with differential pressure levelmeter liquid-phase vaporization
Laminated structure.
Background technique
The transportable pressure vessel tank body of vacuum insulation tank body such as cryogenic liquid truck tank and tank container, is exclusively used in
Storage, transport frozen liquefied gas.The really degree that liquid level is shown in tank is most important to its hauling operation.At present using more
Liquidometer be still differential pressure levelmeter.
The level gauging of cryogenic liquefaction gas is compared with the difficulty that the level gauging of Normal Atmospheric Temperature Liquid has its special, because of cryogenic liquefaction
After gas outflow insulation tank body enters the liquid phase pressure guiding pipe being exposed in atmosphere and instrument, it will be made in pipe by its incoming heat
There are coexistence of gas and liquid phenomenons, and this coexistence of gas and liquid is that unstable, small inducement can lead to intraluminal fluid face significantly
Concussion.When there is such case, the display of liquidometer will be valueless at all.
Therefore, how to solve the above problems, the truth of acquisition cryogenic liquefaction gas liquid level information as far as possible certainly will be at
For the focus technology project of those skilled in the art's research.
Summary of the invention
To solve the above problems, the invention discloses a kind of vacuum insulation tank body differential pressure levelmeter liquid phase gas
Change pressure taking structure, including vacuum insulation tank body and differential pressure levelmeter, the differential pressure levelmeter include gauge outfit and liquid-phase tube, the liquid phase
One end of pipe is equipped with liquid-phase tube pressure tappings, and the vacuum insulation tank body is made of inner pressurd vessel and shell, the shell with it is described interior
Vacuum interlayer is constituted between container, the inner pressurd vessel includes cylinder and the end socket set on the cylinder one end, and the cylinder body bottom is set
There is the current stabilization support plate for fixing the liquid-phase tube pressure tappings, the current stabilization support plate includes bending part, is set on the bending part
There is aperture, the liquid-phase tube pressure tappings of the liquidometer can pass through the aperture, and the liquid-phase tube pressure tappings pass through welding and institute
It states aperture wall portion to fix, the end socket lower part is equipped with the dual-sided splice through its wall portion, and it is two-sided that the liquid-phase tube can pass through this
Connector；Liquid phase pipe outer wall in the vacuum interlayer is wound with heat transfer copper wire, is set at the outer casing inner wall there are two leading
Plume is equipped with heat-conducting plate between heating column, and the both ends of the heat transfer copper wire are wrapped on the heat-conducting plate；
The liquid-phase tube is connect through the enclosure wall section with the impulse interface of the liquidometer.
Preferably, the liquid phase bore is 8-10mm.
Preferably, the heat transfer copper wire is the solid copper wire of red copper of diameter 2-4mm.
Preferably, the lower surface of the bending part has been arranged concentrically cylindrical body thin plate, the cylindrical body around the aperture
The wall portion of thin plate is equipped with several apertures.
Preferably, the diameter dimension of the aperture is 1-2mm.
Preferably, length of the liquid-phase tube pressure tappings wall portion apart from the cylindrical body thin plate wall portion is 3-4mm.
Preferably, height of the liquid-phase tube pressure tappings end face apart from cylindrical body thin plate bottom is 3-4mm, the liquid
Phase pipe pressure tappings end face is 8-10mm apart from the cylinder inboard wall height.
Preferably, the aperture tilts or is vertically set on the wall portion of the cylindrical body thin plate.
Preferably, the liquid-phase tube is equipped with dual-sided splice at the enclosure wall section, and leakproofness is more excellent, extends liquid level
The service life of meter.
Preferably, the differential pressure levelmeter is dual bellows differential gauges.
Beneficial effects of the present invention:
(1) present invention winds copper wire by the liquid-phase tube in vacuum interlayer and the copper wire is wound on heat-conducting plate, shape
At heat conduction structure, compared with traditional approach use it is direct that copper wire led to enclosure wall section structure is more stable, without because of its structure
Not firm and maintenance is repeated, heat-transfer effect is guaranteed, while using the solid copper wire of red copper as heat transfer medium, heat transfer
Structure provides enough heat conduction amounts and forces the single-phase stabilizing gas of formation in liquid-phase tube, realizes that liquid level is accurate, stablizes the effect of display.
(2) by the way that liquid-phase tube pressure tappings are arranged towards cylinder inboard wall, and with the cylinder inboard wall gap setting at 8-
10mm, while by the thin plate cylindrical body with several apertures of setting, which has the function of filtering current stabilization, can both allow cold
Freeze liquefied gas and steadily enter liquidometer liquid-phase tube and do not easily cause fluctuation, and avoidable impurity enters in pipe and results in blockage, into one
Step improves the measurement accuracy of liquidometer, while compared with traditional approach using only in steel pipe wall portion setting aperture, the table that the present invention uses
Face is all provided with foraminate thin plate cylindrical structure, and cryogenic liquefaction gas enters more uniform steady, and measurement effect is more stable.
(3) by setting 8-10mm for liquid phase bore, the probability stifled because of ice caused by remaining steam in pipe is reduced.
(4) since the hole diameter on thin plate cylindrical body is arranged to 1-2mm, size is smaller, is less prone to fluid and largely gushes
Out or reflux phenomenon, comparison are safe.
(5) this structure not only operates convenient, and securely and reliably, and manufacture difficulty is lower, at low cost, is a kind of simple economy
Practical pressure taking structure.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is liquidometer liquid phase pressure tappings and liquid-phase tube heat conduction structure partial schematic diagram of the invention；
Fig. 3 is the structural schematic diagram of current stabilization support plate of the present invention；
In figure, 1- vacuum insulation tank body, 2- shell, 3- cylinder, 4- end socket, 5- liquid-phase tube pressure tappings, 6- current stabilization support plate,
601- bending part, 602- cylindrical body thin plate, 603- aperture, 7- dual-sided splice, 8- liquid-phase tube, 9- heat transfer copper wire, 10- differential pressure liquid
Position meter, 11- heat-conducting plate.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Embodiment 1
As shown in Figure 1, Figure 2 and shown in Fig. 3, a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure, packet
Including vacuum insulation tank body 1 and differential pressure levelmeter 10, the differential pressure levelmeter 10 includes gauge outfit and liquid-phase tube 8, and the one of the liquid-phase tube 8
End is equipped with liquid-phase tube pressure tappings 5, and the vacuum insulation tank body 1 is made of inner pressurd vessel and shell 2, the shell 2 and the content
Vacuum interlayer is constituted between device, the inner pressurd vessel includes cylinder 3 and the end socket 4 set on 3 one end of cylinder, 3 bottom of cylinder
Equipped with the current stabilization support plate 6 for fixed liquid phase pipe pressure tappings 5, the current stabilization support plate 6 includes bending part 601, the bending part
601 are equipped with aperture, and the liquid-phase tube pressure tappings 5 can pass through the aperture, and the liquid-phase tube pressure tappings 5 pass through welding and institute
It states aperture wall portion to fix, 4 lower part of end socket is equipped with the dual-sided splice 7 through its wall portion, and the liquid-phase tube 8 can pass through this pair
Plane tie 7；8 outer wall of liquid-phase tube in the vacuum interlayer is wound with heat transfer copper wire 9, is equipped at 2 inner wall of shell
Two heating columns are equipped with heat-conducting plate 11 between heating column, and the both ends of the heat transfer copper wire 9 are wrapped on the heat-conducting plate 11,
Heat transfer copper wire is welded on stronger on shell 2 by the setting than directly, avoids often overhauling；
The liquid-phase tube 8 is connect through 2 wall portion of shell with the impulse interface of the liquidometer 10.
When it is implemented, 8 internal diameter of liquid-phase tube is preferably 10mm.
When it is implemented, the heat transfer copper wire 9 is the solid copper wire of red copper of diameter 2-4mm, preferably 2mm.
Embodiment 2
The present embodiment is advanced optimizing of making on the basis of embodiment 1, the following table of the specifically described bending part 601
Face has been arranged concentrically cylindrical body thin plate 602 around the aperture, and the wall portion of the cylindrical body thin plate 602 is equipped with several apertures 603.
When it is implemented, the diameter dimension of the aperture 603 is preferably 1.5mm, 603 diameter of aperture on thin plate cylindrical body
It is smaller, it is less prone to fluid and pours out or reflux phenomenon, relatively safety.
Embodiment 3
The present embodiment is advanced optimizing of making on the basis of embodiment 2, specifically described 5 wall of liquid-phase tube pressure tappings
Length of the portion apart from 602 wall portion of cylindrical body thin plate is 8-10mm.
Height of 5 end face of liquid-phase tube pressure tappings apart from 602 bottom of cylindrical body thin plate is 10mm；Setting freezing
Liquefied gas steadily enters inside liquidometer liquid-phase tube 8 through diameter 1.5mm aperture 603 uniformly distributed on cylindrical body thin plate 602, through aperture
603 liquid entered neither easily cause fluctuation, and avoidable impurity enters in pipe and results in blockage；In liquidometer liquid-phase tube 8 uses
Diameter is preferably the stainless-steel pipe of 10mm, reduces the probability stifled because of ice caused by remaining steam in pipe.
Embodiment 4
The present embodiment is advanced optimizing of making on the basis of embodiment 3, and the specifically described inclination of aperture 603 or is hung down
The wall portion of the cylindrical body thin plate 602 is directly set, the liquid entered through aperture neither easily causes fluctuation, and avoidable impurity into
Enter in pipe and result in blockage, so that differential pressure hydraulic press is more accurate.
Embodiment 5
The present embodiment is advanced optimizing of making on the basis of embodiment 4, and the specifically described liquid-phase tube 8 is through described
Dual-sided splice 7 is equipped at 2 wall portion of shell；The differential pressure levelmeter 10 is dual bellows differential gauges.
In use, liquid-phase tube 8 is led in vacuum interlayer from the dual-sided splice 7 that 4 lower part aperture of end socket is welded, heat transfer copper
For 9 one ends wounds of silk in liquid-phase tube 8, the other end is wound in the heat-conducting plate 11 being welded on shell 2, forms letter and effective heat transfer
Structure, obtains from outside to be passed to enough heat conduction amounts and force and forms single-phase stabilizing gas in liquidometer liquid-phase tube 8, realizes differential pressure liquid
Position meter 10 is accurate, stablizes the effect for showing liquid level；Liquidometer liquid-phase tube pressure tappings 5 are rolled in the current stabilization support plate 6 through 3 bottom of cylinder
601 top drilling of comer pieces is welded and fixed, and formation and 3 inner wall gap 10mm of cylinder, cryogenic liquefaction gas are thin through cylindrical body
Uniformly distributed diameter 1.5mm aperture 603 steadily enters inside liquidometer liquid-phase tube 8 on plate 602, and the liquid entered through aperture 603 is neither
It easily causes fluctuation, and can avoid impurity and enter in pipe to result in blockage；Liquidometer liquid-phase tube 8 uses the stainless steel steel of internal diameter 10mm
Pipe reduces the probability stifled because of ice caused by remaining steam in pipe.
Above-described embodiment only describes the optimal usage mode of existing equipment, and similar conventional machinery means is used to replace this reality
The element in example is applied, protection scope is each fallen within.
Claims (10)
1. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure, including vacuum insulation tank body (1) and differential pressure
Liquidometer (10), the differential pressure levelmeter (10) include gauge outfit and liquid-phase tube (8), and one end of the liquid-phase tube (8) is equipped with liquid-phase tube
Pressure tappings (5), it is characterised in that: the vacuum insulation tank body (1) is made of inner pressurd vessel and shell (2), the shell (2) and institute
It states and constitutes vacuum interlayer between inner pressurd vessel, the inner pressurd vessel includes cylinder (3) and the end socket (4) for being set to cylinder (3) one end, institute
It states cylinder (3) bottom and is equipped with the current stabilization support plate (6) for being used for fixed liquid phase pipe pressure tappings (5), the current stabilization support plate (6) includes
Bending part (601), the bending part (601) are equipped with aperture, and the liquid-phase tube pressure tappings (5) can pass through the aperture, and described
Liquid-phase tube pressure tappings (5) are fixed by welding with the aperture wall portion, and end socket (4) lower part is equipped with through the two-sided of its wall portion
Connector (7), the liquid-phase tube (8) can pass through the dual-sided splice (7)；Liquid-phase tube (8) outer wall in the vacuum interlayer
It is wound with heat transfer copper wire (9), is set at shell (2) inner wall there are two heating column, be equipped with heat-conducting plate (11) between heating column,
The both ends of the heat transfer copper wire (9) are wrapped on the heat-conducting plate (11)；
The liquid-phase tube (8) connect through the shell (2) wall portion with the impulse interface of the liquidometer (10).
2. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 1, feature
Be: liquid-phase tube (8) internal diameter is 8-10mm.
3. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 1, feature
Be: the heat transfer copper wire (9) is the solid copper wire of red copper of diameter 2-4mm.
4. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 1, feature
Be: the lower surface of the bending part (601) has been arranged concentrically cylindrical body thin plate (602), the cylindrical body around the aperture
The wall portion of thin plate (602) is equipped with several apertures (603).
5. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 4, feature
Be: the diameter dimension of the aperture (603) is 1-2mm.
6. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 4, feature
Be: length of liquid-phase tube pressure tappings (5) wall portion apart from cylindrical body thin plate (602) wall portion is 3-4mm.
7. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 4, feature
Be: height of liquid-phase tube pressure tappings (5) end face apart from cylindrical body thin plate (602) bottom is 3-4mm, the liquid phase
Height of pipe pressure tappings (5) end face apart from the cylinder (3) inner wall is 8-10mm.
8. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 4, feature
It is: aperture (603) inclination or the wall portion for being vertically set on the cylindrical body thin plate (602).
9. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure according to claim 8, feature
Be: the liquid-phase tube (8) is equipped with dual-sided splice (7) at the shell (2) wall portion.
10. a kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure described in any one according to claim 1~9
Structure, it is characterised in that: the differential pressure levelmeter (10) is dual bellows differential gauges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910436302.6A CN110081948B (en) | 2019-05-23 | 2019-05-23 | Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910436302.6A CN110081948B (en) | 2019-05-23 | 2019-05-23 | Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110081948A true CN110081948A (en) | 2019-08-02 |
| CN110081948B CN110081948B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910436302.6A Active CN110081948B (en) | 2019-05-23 | 2019-05-23 | Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390487A (en) * | 2021-05-13 | 2021-09-14 | 中车长江运输设备集团有限公司 | Differential pressure type liquid level measuring system, low-temperature medium storage tank and tank truck |
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| CN106352940A (en) * | 2016-08-26 | 2017-01-25 | 广东建成机械设备有限公司 | An anti-clogging device for lower liquid level |
| CN207279274U (en) * | 2017-04-21 | 2018-04-27 | 重庆欣雨压力容器制造有限责任公司 | Cryogenic storage tank pressure obtaning device |
| CN108168647A (en) * | 2018-01-16 | 2018-06-15 | 中科睿凌江苏低温设备有限公司 | The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side |
| CN109442206A (en) * | 2018-12-21 | 2019-03-08 | 张家港富瑞深冷科技有限公司 | A kind of vacuum insulation deep cooling pressure vessel |
| CN210119262U (en) * | 2019-05-23 | 2020-02-28 | 江西制氧机有限公司 | Differential pressure liquid level meter liquid phase gasification pressure taking structure for vacuum heat insulation tank body |
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| CN113390487A (en) * | 2021-05-13 | 2021-09-14 | 中车长江运输设备集团有限公司 | Differential pressure type liquid level measuring system, low-temperature medium storage tank and tank truck |
| CN113390487B (en) * | 2021-05-13 | 2024-02-13 | 中车长江运输设备集团有限公司 | Differential pressure type liquid level measurement system, low-temperature medium storage tank and tank truck |
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