CN108168647A - The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side - Google Patents
The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side Download PDFInfo
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- CN108168647A CN108168647A CN201810037905.4A CN201810037905A CN108168647A CN 108168647 A CN108168647 A CN 108168647A CN 201810037905 A CN201810037905 A CN 201810037905A CN 108168647 A CN108168647 A CN 108168647A
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- pressure
- level gauge
- type level
- differential pressure
- storage tank
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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
- G01F23/14—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
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention discloses a kind of pressure stable-pressure device of liquefied gas at low temp differential pressure type level gauge high-pressure side, including the differential pressure type level gauge being connected respectively with the high-pressure side pressure tappings of basin and low-pressure end pressure tappings through pressure guiding pipe, anti- fluctuation impact-absorbing shell is fixedly installed on high-pressure side pressure tappings in basin, the surrounding of the anti-fluctuation impact-absorbing shell sets at least one inlet opening；The damper tube being made of multistage bend pipe is provided in the anti-fluctuation impact-absorbing shell, straight up, the other end is connected on high-pressure side pressure tappings and is communicated with the differential pressure type level gauge for one end of the damper tube.The pressure of the differential pressure type level gauge high-pressure side of the achievable low temperature LPG storage tank of the present invention is stablized, and avoids forming differential pressure type level gauge cryogenic freezing injury.And it is not influenced by differential pressure type level gauge installation site, safety is good, simple in structure, principle is simple, easy to implement.
Description
Technical field
The present invention relates to a kind of stable-pressure devices of differential pressure type level gauge, specifically a kind of to be store for liquefied gas at low temp
The pressure stable-pressure device of tank differential pressure type level gauge high-pressure side.
Background technology
Liquefied gas at low temp storage temperature is generally at -40 DEG C hereinafter, its hold-up vessel is double-jacket vacuum insulation basin
Or foamed heat insulating thermal insulation basin, most at present to carry out level gauging using differential pressure type level gauge, operation principle is：Liquid level gauge is adopted
Collect refrigerated storage tank top gas phase pressure and the pressure signal of bottom minimum liquid level point liquid, pass through two bellows pressures of difference gauge
(low pressure chamber connects power induction cavity with tank top gas-phase space；High pressure chest is connected with tank bottom liquid phase minimum point) measure two
Pressure difference value --- the fluid column static pressure of cryogenic liquid i.e. in basin of point, and be reflected on liquid level gauge instruction disk.
Can the high pressure chest of differential pressure levelmeter and the connection pressure guiding device of basin liquid phase minimum liquid level pressure signaling point, export
Stable, correct pressure signal, accurate measure for liquefied gas at low temp liquid level in refrigerated storage tank is vital.It is conventional
Pilot connectivity structure, when liquefied gas at low temp along pressure guiding pipe flow out basin heat insulation layer, into the liquid phase impulse being exposed in air
After pipe and instrument, it will make in pipe that there are extremely unstable gas-liquids to coexist phenomenon by the heat that impulse pipeline is passed to.Thus it brings
The problem of be reflected in two aspect：On the one hand it is the balance that extraneous small inducement will all influence liquid level in connecting pipe, so as to lead
Differential pressure levelmeter liquid level is caused significantly to shake, can not accurately measure basin liquid level；And liquid enters in connecting pipe and will be formed
The practical fluid column static pressure that local fluid column static pressure measures basin needs is balanced, therefore reflect on differential pressure levelmeter
Liquid level height will not be the true liquid level of basin.And change with the installation site of differential pressure levelmeter, the liquid level of measurement also will hair
Changing.On the other hand, the low temperature gas-liquid mixed media of supercooling enters liquid level gauge, also results in the frosting of instruction disk, moisture condensation, from
And seriously affect the correct instruction of liquid level gauge.
Invention content
The technical problem to be solved by the present invention is to：A kind of low temperature LPG storage tank differential pressure type level gauge high-pressure side is provided
Pressure stable-pressure device is avoided, it can be achieved that the pressure stabilization of the differential pressure type level gauge high-pressure side of low temperature LPG storage tank to differential pressure
Formula liquid level gauge forms cryogenic freezing injury.
To solve the above problems, patent of the present invention the technical solution adopted is that：It is proposed that a kind of low temperature LPG storage tank is poor
The pressure stable-pressure device of pressure type liquid level gauge high-pressure side, including being taken respectively with the high-pressure side pressure tappings and low-pressure end of basin through pressure guiding pipe
Anti- fluctuation impact-absorbing shell, the anti-wave is fixedly installed on the high-pressure side pressure tappings in basin in the differential pressure type level gauge that is connected of pressure mouth
The surrounding of dynamic impact-absorbing shell sets at least one inlet opening；The resistance being made of multistage bend pipe is provided in the anti-fluctuation impact-absorbing shell
Buddhist nun manages, and straight up, the other end is connected on high-pressure side pressure tappings and the differential pressure type level gauge phase for one end of the damper tube
It is logical.
The further of the present invention limits technical solution：Aforementioned low temperature LPG storage tank differential pressure type level gauge high-pressure side takes
Stable-pressure device is pressed, the anti-fluctuation impact-absorbing shell is round or rectangular closing cover, is located on lower side described in arrangement in its surrounding
Inlet opening.
The differential pressure type level gauge high-pressure side pressure stable-pressure device of aforementioned low temperature LPG storage tank, the damper tube vertically to
On one end close to it is described it is anti-fluctuation impact-absorbing shell head cover.
Further, the pressure stable-pressure device of aforementioned low temperature LPG storage tank differential pressure type level gauge high-pressure side, it is described anti-
Fluctuation impact-absorbing shell is connect with basin using welding manner.
The beneficial effects of the invention are as follows：The differential pressure type level gauge high-pressure side of the achievable low temperature LPG storage tank of the present invention
Pressure is stablized, and avoids forming differential pressure type level gauge cryogenic freezing injury.And not by the shadow of differential pressure type level gauge installation site
It rings, safety is good, simple in structure, principle is simple, easy to implement.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the structure of the present invention is described in further detail.
A kind of pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side provided in this embodiment, knot
Structure as shown in Figure 1, including through 6 gentle phase pressure guiding pipe 11 of liquid phase pressure guiding pipe respectively with the high-pressure side pressure of refrigerated storage tank inner pressurd vessel 2
The differential pressure type level gauge 8 that is connected with low-pressure end pressure tappings of mouth is fixed on the high-pressure side pressure tappings in refrigerated storage tank inner pressurd vessel 2 and is set
Round anti-fluctuation impact-absorbing shell 3 is put, and locates 3~4 inlet openings of arrangement on lower side in the surrounding of anti-fluctuation impact-absorbing shell；It is slow in anti-fluctuation
The damper tube 4 being made of multistage bend pipe is provided in punching cover, damps one end of 4 pipes straight up close to the top of anti-fluctuation impact-absorbing shell
Lid, the other end are connected on high-pressure side pressure tappings and are communicated with differential pressure type level gauge 8.
When installing and using, the gas phase pressure guiding pipe 11 of differential pressure type level gauge 8 is connected to the top of refrigerated storage tank inner pressurd vessel 2
The liquid phase pressure guiding pipe 6 of differential pressure type level gauge 8 is connected on the take over 5 for being welded on 2 minimum point of refrigerated storage tank inner pressurd vessel by portion, will
Damper tube 4 is welded on inside refrigerated storage tank inner pressurd vessel 2 on take over 5, and then anti-fluctuation impact-absorbing shell 3 is sleeved on damper tube 4, is welded
In the minimum point of refrigerated storage tank inner pressurd vessel 2.
When there being cryogenic liquid in refrigerated storage tank, cryogenic liquid is entered by the circumferential aperture of anti-fluctuation impact-absorbing shell 3
Into anti-fluctuation impact-absorbing shell 3, anti-fluctuation 3 inner top of impact-absorbing shell can form stable gas-phase space, and pressure can be approximated to be most
The fluid column static pressure of low spot, and it is very stable, since the import of damper tube 4 is in the top gas phase space of anti-fluctuation impact-absorbing shell 3, institute
It is entered in liquid phase pressure guiding pipe 6 with not having cryogenic liquid, so when the balanced valve for opening differential pressure type level gauge 8, by differential pressure type
Two bellows pressure sensitive intracavitary initial pressures balance of liquid level gauge 8 is after basin gaseous pressure, then to turn off the connection of two chambers flat
Weigh valve, then the differential pressure that differential pressure type level gauge 8 measures can correctly reflect the liquid of storage cryogenic liquid in cryogenic liquid tank
Position height value, and ensure it is unrelated with the installation site of differential pressure type level gauge 8, will not to differential pressure type level gauge 8 formed low temperature cold
Frostbite is done harm to.It is verified by the use on cryogenic liquid tank and low-temperature tanker, obtains good effect, solve cryogenic liquid
Level gauging problem.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical solution, all fall within the present invention claims protection domain.
Claims (4)
1. the pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side, including through pressure guiding pipe respectively with basin
The differential pressure type level gauge that is connected with low-pressure end pressure tappings of high-pressure side pressure tappings, it is characterised in that：High-pressure side in basin takes
Anti- fluctuation impact-absorbing shell is fixedly installed on pressure mouth, the surrounding of the anti-fluctuation impact-absorbing shell sets at least one inlet opening；Described anti-
The damper tube being made of multistage bend pipe is provided in fluctuation impact-absorbing shell, straight up, the other end connects for one end of the damper tube
It is communicated on high-pressure side pressure tappings with the differential pressure type level gauge.
2. the pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side according to claim 1, special
Sign is：The anti-fluctuation impact-absorbing shell is round or rectangular closing cover, locates to arrange the feed liquor on lower side in its surrounding
Hole.
3. the pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side according to claim 1, special
Sign is：The one end of the damper tube straight up is close to the head cover of the anti-fluctuation impact-absorbing shell.
4. the pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side according to claim 1, special
Sign is：The anti-fluctuation impact-absorbing shell is connect with basin using welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037905.4A CN108168647A (en) | 2018-01-16 | 2018-01-16 | The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037905.4A CN108168647A (en) | 2018-01-16 | 2018-01-16 | The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side |
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| Publication Number | Publication Date |
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| CN108168647A true CN108168647A (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810037905.4A Pending CN108168647A (en) | 2018-01-16 | 2018-01-16 | The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081948A (en) * | 2019-05-23 | 2019-08-02 | 江西制氧机有限公司 | A kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure |
| CN110271784A (en) * | 2019-07-02 | 2019-09-24 | 张家港中集圣达因低温装备有限公司 | Wet tank |
| CN111380589A (en) * | 2020-03-28 | 2020-07-07 | 华中科技大学 | Liquid level measuring device and liquid level measuring method for pressure difference type gas storage |
| CN113624294A (en) * | 2021-10-11 | 2021-11-09 | 南通三锐化工装备有限公司 | Pressure measuring device of differential pressure measuring liquid level meter for cryogenic liquid storage tank |
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| CN101206133A (en) * | 2007-12-14 | 2008-06-25 | 西安长庆科技工程有限责任公司 | Built-in pressure sampling method for differential pressure levelmeter |
| CN202903277U (en) * | 2012-11-20 | 2013-04-24 | 航天晨光股份有限公司 | Pressure-taking pressure-stabilizing device of differential pressure type liquidometer high-pressure end of low-temperature liquefied gas storage tank |
| CN203881412U (en) * | 2014-06-10 | 2014-10-15 | 浙江中宁硅业有限公司 | Device for fast calibrating differential pressure type liquidometer on working condition site |
| CN204128626U (en) * | 2014-08-11 | 2015-01-28 | 石家庄安瑞科气体机械有限公司 | For the differential-pressure-type liquid level meter stable-pressure device of transportable pressure vessel |
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2018
- 2018-01-16 CN CN201810037905.4A patent/CN108168647A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206133A (en) * | 2007-12-14 | 2008-06-25 | 西安长庆科技工程有限责任公司 | Built-in pressure sampling method for differential pressure levelmeter |
| CN202903277U (en) * | 2012-11-20 | 2013-04-24 | 航天晨光股份有限公司 | Pressure-taking pressure-stabilizing device of differential pressure type liquidometer high-pressure end of low-temperature liquefied gas storage tank |
| CN203881412U (en) * | 2014-06-10 | 2014-10-15 | 浙江中宁硅业有限公司 | Device for fast calibrating differential pressure type liquidometer on working condition site |
| CN204128626U (en) * | 2014-08-11 | 2015-01-28 | 石家庄安瑞科气体机械有限公司 | For the differential-pressure-type liquid level meter stable-pressure device of transportable pressure vessel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081948A (en) * | 2019-05-23 | 2019-08-02 | 江西制氧机有限公司 | A kind of vacuum insulation tank body differential pressure levelmeter liquid-phase vaporization pressure taking structure |
| CN110081948B (en) * | 2019-05-23 | 2024-01-30 | 江西制氧机有限公司 | Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body |
| CN110271784A (en) * | 2019-07-02 | 2019-09-24 | 张家港中集圣达因低温装备有限公司 | Wet tank |
| CN111380589A (en) * | 2020-03-28 | 2020-07-07 | 华中科技大学 | Liquid level measuring device and liquid level measuring method for pressure difference type gas storage |
| CN113624294A (en) * | 2021-10-11 | 2021-11-09 | 南通三锐化工装备有限公司 | Pressure measuring device of differential pressure measuring liquid level meter for cryogenic liquid storage tank |
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Application publication date: 20180615 |
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