CN116146892A - High-precision detection device and method for liquid level of low-temperature storage tank - Google Patents

High-precision detection device and method for liquid level of low-temperature storage tank Download PDF

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Publication number
CN116146892A
CN116146892A CN202210986608.0A CN202210986608A CN116146892A CN 116146892 A CN116146892 A CN 116146892A CN 202210986608 A CN202210986608 A CN 202210986608A CN 116146892 A CN116146892 A CN 116146892A
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liquid
low
storage tank
temperature storage
liquid level
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赵文毅
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Chengdu Csun Industrial Co
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Chengdu Csun Industrial Co
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Priority to CN202210986608.0A priority Critical patent/CN116146892A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0621—Volume
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a device and a method for detecting the liquid level of a low-temperature storage tank with high precision. According to the invention, the actual low-temperature liquid density can be calculated by the differential pressure of the two fixed liquid sites a and b of the low-temperature storage tank detected by the first differential pressure sensor S1 of the liquid level meter L, so as to correct the liquid level calculation error caused by the change of the low-temperature liquid density along with the change of the working pressure; the distance between the bottom d surface of the liner and the liquid sealing point c can be calculated by the differential pressure from a fixed liquid point a of the low-temperature storage tank to the liquid sealing point c detected by the second differential pressure sensor S2 of the liquid level meter L so as to ensure that the liquid level H is the height from the liquid level to the bottom d surface of the liner. The invention solves the defect of inaccurate measurement of the current liquid level meter, improves the measurement precision of the liquid level of the low-temperature liquid, and meets the higher and higher metering requirement of customers on the liquid level of the liquid in the low-temperature storage tank.

Description

High-precision detection device and method for liquid level of low-temperature storage tank
Technical Field
The invention relates to a device and a method for detecting the liquid level of liquid in a low-temperature storage tank with high precision.
Background
The low-temperature storage tank is a pressure container for containing liquid nitrogen, liquid oxygen, liquid argon, liquid hydrogen, liquid helium, liquid carbon dioxide, liquefied natural gas and other low-temperature liquids, the density of the low-temperature liquid can change along with the change of the pressure of the low-temperature storage tank, the pressure of the low-temperature storage tank is not saturated vapor pressure, the density of the low-temperature liquid cannot be corrected by detecting the pressure of the low-temperature storage tank, and the density of the low-temperature liquid like LNG can be different due to the fact that the components are different; the principle of detecting the liquid level by the traditional differential pressure type liquid level meter is calculated by the detected differential pressure and the set density, and the pressure of the low-temperature storage tank is not constant, so that the density is a variable, and the calculated liquid level is inaccurate; meanwhile, the liquid phase end pressure guiding pipe of the low-temperature storage tank liner is provided with a liquid sealing point, the position of the liquid sealing point is difficult to ensure a known fixed value due to the reasons of manufacturing technology and the like, the fixed value can be lower than the bottom of the low-temperature storage tank liner or higher than the bottom of the low-temperature storage tank liner, liquid exists from the liquid sealing point to the bottom of the low-temperature storage tank liner, and the liquid level can generate differential pressure to bring errors.
Disclosure of Invention
The invention aims to solve the problems and provide a high-precision liquid level detection device for a low-temperature storage tank.
Another object of the invention is to provide a method for detecting the liquid level of the low-temperature storage tank with high precision.
The technical scheme of the invention is as follows:
high accuracy detection device of low temperature storage tank liquid level, characterized by: the device comprises a liquid level meter L, a low-temperature storage tank (2), a gas phase valve V1, a liquid phase valve V4, a density upper valve V2 and a density lower valve V3;
the liquid level meter L is internally provided with a first differential pressure sensor S1, a second differential pressure sensor S2 and a third differential pressure sensor S3;
the third differential pressure sensor S3 of the liquid level meter L is respectively connected with a gas phase valve V1 and a liquid phase valve V4 through a pressure guiding pipe, the gas phase valve V1 is connected to a gas phase end (10) of the low-temperature storage tank (2) through the pressure guiding pipe, the liquid phase valve V4 is connected to a liquid phase end (11) of the low-temperature storage tank (2) through the pressure guiding pipe, and the purpose of the third differential pressure sensor S3 is to measure the differential pressure from the liquid level to a liquid sealing point c so as to calculate the liquid level height h3;
the first differential pressure sensor S1 of the liquid level meter L is respectively connected with the density upper valve V2 and the density lower valve V3 through pressure leading pipes, the density upper valve V2 is connected to the density upper valve pressure leading end (12) of the low-temperature storage tank (2) through pressure leading pipes, the density lower valve V3 is connected to the density lower valve pressure leading end (13) of the low-temperature storage tank (2) through pressure leading pipes, and the purpose of the first differential pressure sensor S1 is to measure the differential pressure between the point a and the point b of liquid to calculate the actual density of the liquid;
the second differential pressure sensor S2 of the liquid level meter L is respectively connected with the density upper valve V2 and the liquid phase valve V4 through pressure guiding pipes, and the purpose of the second differential pressure sensor S2 is to measure the differential pressure between the liquid point a and the liquid point c to calculate the liquid level height h5 from the bottom d of the liner to the liquid sealing point c;
the position of the point a connected with the pressure leading end (12) of the density upper valve and the position of the point b connected with the pressure leading end (13) of the density lower valve are between the allowable maximum liquid level and the bottom d of the liner, and the maximum filling rate of the liquid of the low-temperature storage tank is 90-95% of the geometric volume of the liner for different mediums;
the point a is a liner pressure-guiding point of the valve pressure-guiding end (12) on the density corresponding to the low-temperature storage tank (2), the point b is a liner pressure-guiding point of the valve pressure-guiding end (13) on the density corresponding to the low-temperature storage tank (2), the point c is a liquid-phase liquid sealing point of the low-temperature storage tank (2), liquid is filled in a pressure-guiding pipe between the point c and the liner, gas is filled in the pressure-guiding pipe between the point c and the liquid-phase end (11), and the point d is the bottom of the liner of the low-temperature storage tank (2).
The low-temperature storage tank liquid level high-precision detection device is characterized in that: the liquid level meter comprises three differential pressure transmitters and a data acquisition device.
The low-temperature storage tank liquid level high-precision detection device is characterized in that: the shape of the low-temperature storage tank (2) is cylindrical, spherical or square with or without a sealing head.
The low-temperature storage tank liquid level high-precision detection device is characterized in that: the low-temperature storage tank (2) is in a horizontal type and a vertical type.
The method for detecting the liquid level of the low-temperature storage tank with high precision is characterized by comprising the following steps of:
the first step: the first differential pressure sensor S1 of the liquid level meter L detects the differential pressure delta P1 of the points a and b of the liquid in the low-temperature storage tank (2), the density rho of the low-temperature liquid is calculated by the formula (1), h1 is a fixed value provided by the manufacturer of the storage tank when leaving the factory,
ρ＝ΔP1/h1………………(1)
in the middle of
ρ represents the density of the cryogenic liquid
Δp1 represents the differential pressure between points a and b of the liquid
h1 represents the height between the points a and b;
and a second step of: the second differential pressure sensor S2 of the liquid level meter L detects differential pressure delta P2 of a point a and a point c of liquid in the low-temperature storage tank (2), h2 is calculated by a formula (2), the height h5 from the bottom d of the liner of the low-temperature storage tank (2) to the liquid sealing point c is calculated by a formula (3), h4 is a fixed value provided by a storage tank manufacturer when the storage tank manufacturer leaves a factory,
h2＝ΔP2/ρ………………(2)
h5＝h2-h4………………(3)
in the middle of
ρ represents the density of the cryogenic liquid
Δp2 represents the differential pressure between points a and c of the liquid
h2 represents the height between points a and c
h4 represents the height between the point a and the bottom d of the liner of the low-temperature storage tank
h5 represents the height between the points d and c at the bottom of the liner of the low-temperature storage tank;
and a third step of: the third differential pressure sensor S3 of the liquid level meter L detects the differential pressure delta P3 from the liquid level of the liquid in the low-temperature storage tank (2) to the liquid sealing point c, H3 is calculated by the formula (4), the actual liquid level H of the liquid in the liner of the low-temperature storage tank (2) is calculated by the formula (5),
h3＝ΔP3/ρ………………(4)
H＝h3-h5…………………(5)
in the method, in the process of the invention,
ρ represents the density of the cryogenic liquid
Δp3 represents the differential pressure between the level of the liquid and point c
h3 represents the height between the level of the liquid and point c
h5 represents the height between d and c points at the bottom of the liner of the low-temperature storage tank
H represents the actual liquid level of the liquid in the liner of the low-temperature storage tank.
The advantages and effects:
1. the liquid level displayed by the traditional differential pressure type liquid level meter is calculated by the detected differential pressure and the set fixed density, and the actual low-temperature liquid density can be calculated by the differential pressure of two fixed liquid sites a and b of the low-temperature storage tank detected by the first differential pressure sensor S1 of the liquid level meter L so as to correct the liquid level calculation error caused by the change of the low-temperature liquid density along with the change of the working pressure;
2. the liquid level displayed by the traditional differential pressure type liquid level meter is the liquid level brought by the differential pressure generated by the liquid in the pressure guiding pipe from the bottom d of the inner container to the liquid sealing point c, and the differential pressure from the liquid fixing point a of the low-temperature storage tank detected by the second differential pressure sensor S2 of the liquid level meter L to the liquid sealing point c can be calculated to ensure that the liquid level H is the height from the liquid level to the bottom d of the inner container, so that the measurement precision of the liquid level H of the low-temperature liquid is improved;
3. the invention meets the metering requirement of customers for higher and higher liquid level of the liquid in the low-temperature storage tank, and has great significance for calculating the accurate liquid volume and liquid weight of the horizontal storage tank and the spherical tank through the liquid level height.
In the device for detecting the liquid level of the low-temperature storage tank with high precision, the actual low-temperature liquid density can be calculated by the differential pressure of two fixed liquid points a and b of the low-temperature storage tank (2) detected by a first differential pressure sensor S1 of the liquid level meter L, so as to correct the liquid level calculation error caused by the change of the low-temperature liquid density along with the change of working pressure; the error generated by the liquid level H5 between the bottom d surface of the liner and the liquid sealing point c can be calculated by the differential pressure between a fixed liquid point a and the liquid sealing point c of the low-temperature storage tank (2) detected by the second differential pressure sensor S2 of the liquid level meter L, so that the liquid level H is ensured to be the height from the liquid level to the bottom d surface of the liner.
The liquid level meter L is internally provided with a data acquisition processing unit and a display unit for the first differential pressure sensor S1, the second differential pressure sensor S2 and the third differential pressure sensor S3.
Drawings
FIG. 1 is a schematic diagram of a low temperature sump level high precision detection apparatus and method.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 shows a schematic diagram of the device and method for detecting the liquid level of a low-temperature storage tank with high precision, which are provided by the invention, and comprise a liquid level meter L, a low-temperature storage tank (2), a gas phase valve V1, a liquid phase valve V4, a density upper valve V2 and a density lower valve V3;
the liquid level meter L is internally provided with a first differential pressure sensor S1, a second differential pressure sensor S2 and a third differential pressure sensor S3;
the third differential pressure sensor S3 of the liquid level meter L is respectively connected with a gas phase valve V1 and a liquid phase valve V4 through a pressure guiding pipe, the gas phase valve V1 is connected to a gas phase end (10) of the low-temperature storage tank (2) through the pressure guiding pipe, the liquid phase valve V4 is connected to a liquid phase end (11) of the low-temperature storage tank (2) through the pressure guiding pipe, and the purpose of the third differential pressure sensor S3 is to measure the differential pressure from the liquid level to a liquid sealing point c so as to calculate the liquid level height h3;
the first differential pressure sensor S1 of the liquid level meter L is respectively connected with the density upper valve V2 and the density lower valve V3 through pressure leading pipes, the density upper valve V2 is connected to the density upper valve pressure leading end (12) of the low-temperature storage tank (2) through pressure leading pipes, the density lower valve V3 is connected to the density lower valve pressure leading end (13) of the low-temperature storage tank (2) through pressure leading pipes, and the purpose of the first differential pressure sensor S1 is to measure the differential pressure between the point a and the point b of liquid to calculate the actual density of the liquid;
the second differential pressure sensor S2 of the liquid level meter L is respectively connected with the density upper valve V2 and the liquid phase valve V4 through pressure guiding pipes, and the purpose of the second differential pressure sensor S2 is to measure the differential pressure between the liquid point a and the liquid point c to calculate the liquid level height h5 from the bottom d of the liner to the liquid sealing point c;
the position of the point a connected with the pressure leading end (12) of the density upper valve and the position of the point b connected with the pressure leading end (13) of the density lower valve are between the allowable maximum liquid level and the bottom d of the liner, and the maximum filling rate of the liquid of the low-temperature storage tank is 90-95% of the geometric volume of the liner for different mediums;
the point a is a liner pressure-guiding point of the valve pressure-guiding end (12) on the density corresponding to the low-temperature storage tank (2), the point b is a liner pressure-guiding point of the valve pressure-guiding end (13) on the density corresponding to the low-temperature storage tank (2), the point c is a liquid-phase liquid sealing point of the low-temperature storage tank (2), liquid is filled in a pressure-guiding pipe between the point c and the liner, gas is filled in the pressure-guiding pipe between the point c and the liquid-phase end (11), and the point d is the bottom of the liner of the low-temperature storage tank (2).
The low-temperature storage tank liquid level high-precision detection device is characterized in that: the liquid level meter comprises three differential pressure transmitters and a data acquisition device.
The low-temperature storage tank liquid level high-precision detection device is characterized in that: the shape of the low-temperature storage tank (2) is cylindrical, spherical or square with or without a sealing head.
The low-temperature storage tank liquid level high-precision detection device is characterized in that: the low-temperature storage tank (2) is in a horizontal type and a vertical type.
The method for detecting the liquid level of the low-temperature storage tank with high precision is characterized by comprising the following steps of:
the first step: the first differential pressure sensor S1 of the liquid level meter L detects the differential pressure delta P1 of the points a and b of the liquid in the low-temperature storage tank (2), the density rho of the low-temperature liquid is calculated by the formula (1), h1 is a fixed value provided by the manufacturer of the storage tank when leaving the factory,
ρ＝ΔP1/h1………………(1)
in the middle of
ρ represents the density of the cryogenic liquid
Δp1 represents the differential pressure between points a and b of the liquid
h1 represents the height between the points a and b;
and a second step of: the second differential pressure sensor S2 of the liquid level meter L detects differential pressure delta P2 of a point a and a point c of liquid in the low-temperature storage tank (2), h2 is calculated by a formula (2), the height h5 from the bottom d of the liner of the low-temperature storage tank (2) to the liquid sealing point c is calculated by a formula (3), h4 is a fixed value provided by a storage tank manufacturer when the storage tank manufacturer leaves a factory,
h2＝ΔP2/ρ………………(2)
h5＝h2-h4………………(3)
in the middle of
ρ represents the density of the cryogenic liquid
Δp2 represents the differential pressure between points a and c of the liquid
h2 represents the height between points a and c
h4 represents the height between the point a and the bottom d of the liner of the low-temperature storage tank
h5 represents the height between the points d and c at the bottom of the liner of the low-temperature storage tank;
and a third step of: the third differential pressure sensor S3 of the liquid level meter L detects the differential pressure delta P3 from the liquid level of the liquid in the low-temperature storage tank (2) to the liquid sealing point c, H3 is calculated by the formula (4), the actual liquid level H of the liquid in the liner of the low-temperature storage tank (2) is calculated by the formula (5),
h3＝ΔP3/ρ………………(4)
H＝h3-h5…………………(5)
in the method, in the process of the invention,
ρ represents the density of the cryogenic liquid
Δp3 represents the differential pressure between the level of the liquid and point c
h3 represents the height between the level of the liquid and point c
h5 represents the height between d and c points at the bottom of the liner of the low-temperature storage tank
H represents the actual liquid level of the liquid in the liner of the low-temperature storage tank.
Along with the progress of science and technology and different application occasions, the invention can have various changes, for example, the low-temperature liquid density signal detected and calculated by the liquid level meter can be transmitted to the liquid filling flowmeter to improve the accuracy of the flowmeter and the like. All modifications which come within the spirit and principles of the invention are deemed to be within the scope of the invention.

Claims (5)

1. High accuracy detection device of low temperature storage tank liquid level, characterized by: the device comprises a liquid level meter L, a low-temperature storage tank (2), a gas phase valve V1, a liquid phase valve V4, a density upper valve V2 and a density lower valve V3;
the liquid level meter L is internally provided with a first differential pressure sensor S1, a second differential pressure sensor S2 and a third differential pressure sensor S3;
the third differential pressure sensor S3 of the liquid level meter L is respectively connected with a gas phase valve V1 and a liquid phase valve V4 through a pressure guiding pipe, the gas phase valve V1 is connected to a gas phase end (10) of the low-temperature storage tank (2) through the pressure guiding pipe, the liquid phase valve V4 is connected to a liquid phase end (11) of the low-temperature storage tank (2) through the pressure guiding pipe, and the purpose of the third differential pressure sensor S3 is to measure the differential pressure from the liquid level to a liquid sealing point c so as to calculate the liquid level height h3;
the first differential pressure sensor S1 of the liquid level meter L is respectively connected with the density upper valve V2 and the density lower valve V3 through pressure leading pipes, the density upper valve V2 is connected to the density upper valve pressure leading end (12) of the low-temperature storage tank (2) through pressure leading pipes, the density lower valve V3 is connected to the density lower valve pressure leading end (13) of the low-temperature storage tank (2) through pressure leading pipes, and the purpose of the first differential pressure sensor S1 is to measure the differential pressure between the point a and the point b of liquid to calculate the actual density of the liquid;
the second differential pressure sensor S2 of the liquid level meter L is respectively connected with the density upper valve V2 and the liquid phase valve V4 through pressure guiding pipes, and the purpose of the second differential pressure sensor S2 is to measure the differential pressure between the liquid point a and the liquid point c to calculate the liquid level height h5 from the bottom d of the liner to the liquid sealing point c;
the position of the point a connected with the pressure leading end (12) of the density upper valve and the position of the point b connected with the pressure leading end (13) of the density lower valve are between the allowable maximum liquid level and the bottom d of the liner, and the maximum filling rate of the liquid of the low-temperature storage tank is 90-95% of the geometric volume of the liner for different mediums;
the point a is a liner pressure-guiding point of the valve pressure-guiding end (12) on the density corresponding to the low-temperature storage tank (2), the point b is a liner pressure-guiding point of the valve pressure-guiding end (13) on the density corresponding to the low-temperature storage tank (2), the point c is a liquid-phase liquid sealing point of the low-temperature storage tank (2), liquid is filled in a pressure-guiding pipe between the point c and the liner, gas is filled in the pressure-guiding pipe between the point c and the liquid-phase end (11), and the point d is the bottom of the liner of the low-temperature storage tank (2).
2. The apparatus for high-precision detection of a liquid level in a low-temperature tank according to claim 1, wherein: the liquid level meter comprises three differential pressure transmitters and a data acquisition device.
3. The apparatus for high-precision detection of a liquid level in a low-temperature tank according to claim 1, wherein: the shape of the low-temperature storage tank (2) is cylindrical, spherical or square with or without a sealing head.
4. The apparatus for high-precision detection of a liquid level in a low-temperature tank according to claim 1, wherein: the low-temperature storage tank (2) is in a horizontal type and a vertical type.
5. The high-precision detection method for the liquid level of the low-temperature storage tank according to claims 1 to 4, characterized by comprising the following steps:
the first step: the first differential pressure sensor S1 of the liquid level meter L detects the differential pressure delta P1 of the points a and b of the liquid in the low-temperature storage tank (2), the density rho of the low-temperature liquid is calculated by the formula (1), h1 is a fixed value provided by the manufacturer of the storage tank when leaving the factory,
ρ＝ΔP1/h1………………(1)
in the middle of
ρ represents the density of the cryogenic liquid
Δp1 represents the differential pressure between points a and b of the liquid
h1 represents the height between the points a and b;
and a second step of: the second differential pressure sensor S2 of the liquid level meter L detects differential pressure delta P2 of a point a and a point c of liquid in the low-temperature storage tank (2), h2 is calculated by a formula (2), the height h5 from the bottom d of the liner of the low-temperature storage tank (2) to the liquid sealing point c is calculated by a formula (3), h4 is a fixed value provided by a storage tank manufacturer when the storage tank manufacturer leaves a factory,
h2＝ΔP2/ρ………………(2)
h5＝h2-h4………………(3)
in the middle of
ρ represents the density of the cryogenic liquid
Δp2 represents the differential pressure between points a and c of the liquid
h2 represents the height between points a and c
h4 represents the height between the point a and the bottom d of the liner of the low-temperature storage tank
h5 represents the height between the points d and c at the bottom of the liner of the low-temperature storage tank;
and a third step of: the third differential pressure sensor S3 of the liquid level meter L detects the differential pressure delta P3 from the liquid level of the liquid in the low-temperature storage tank (2) to the liquid sealing point c, H3 is calculated by the formula (4), the actual liquid level H of the liquid in the liner of the low-temperature storage tank (2) is calculated by the formula (5),
h3＝ΔP3/ρ………………(4)
H＝h3-h5…………………(5)
in the method, in the process of the invention,
ρ represents the density of the cryogenic liquid
Δp3 represents the differential pressure between the level of the liquid and point c
h3 represents the height between the level of the liquid and point c
h5 represents the height between d and c points at the bottom of the liner of the low-temperature storage tank
H represents the actual liquid level of the liquid in the liner of the low-temperature storage tank.
CN202210986608.0A 2022-08-17 2022-08-17 High-precision detection device and method for liquid level of low-temperature storage tank Pending CN116146892A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210986608.0A CN116146892A (en) 2022-08-17 2022-08-17 High-precision detection device and method for liquid level of low-temperature storage tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210986608.0A CN116146892A (en) 2022-08-17 2022-08-17 High-precision detection device and method for liquid level of low-temperature storage tank

Publications (1)

Publication Number Publication Date
CN116146892A true CN116146892A (en) 2023-05-23

Family

ID=86337755

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CN202210986608.0A Pending CN116146892A (en) 2022-08-17 2022-08-17 High-precision detection device and method for liquid level of low-temperature storage tank

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