CN208012707U - A kind of high-precision LNG storage tank capacitance level gauge - Google Patents
A kind of high-precision LNG storage tank capacitance level gauge Download PDFInfo
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- CN208012707U CN208012707U CN201820218348.1U CN201820218348U CN208012707U CN 208012707 U CN208012707 U CN 208012707U CN 201820218348 U CN201820218348 U CN 201820218348U CN 208012707 U CN208012707 U CN 208012707U
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- liquid level
- tank
- temperature sensor
- sensor
- storage tank
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model provides a kind of high-precision LNG storage tank capacitance level gauge, including courage outside tank, tank liner, temperature sensor, liquid level sensor, temperature sensor wires, liquid level sensor lead, fluid level transmitter and height displaying instrument, the tank liner is arranged outside tank in courage, the temperature sensor and liquid level sensor are arranged in tank liner, the temperature sensor is connected by temperature sensor wires with fluid level transmitter, the liquid level sensor is connected by liquid level sensor lead with fluid level transmitter, the height displaying instrument is connected with fluid level transmitter.The advantages of the utility model is：Simple in structure durable, the hardware installation in low-temperature storage tank is simple and substantially non-maintaining；Measurement accuracy is higher, and when measurement is not influenced by cryogenic liquid physical parameter itself, also unrelated with tank inner pressure, be can accurately measure and is monitored the liquid level in basin in real time；It is relatively low compared to other liquid level gauge costs.
Description
Technical field
The utility model is related to high-precision LNG storage tank field, more particularly to a kind of high-precision LNG storage tank capacitance type liquid level
Meter.
Background technology
With the extensive use of liquefied natural gas (LNG), gas station is needed by storing the low-temperature storage tank of LNG based on accurately
Amount is the important link of gas station goods entry, stock and sales and the important means of safe operation supervision.Currently, domestic gas station majority is adopted
The liquid level of LNG in storage tank is measured with differential pressure levelmeter, error is big and unstable, or even differential pressure levelmeter indicating value when close to slack tank
For " full ", the demand of the daily metering of gas station low-temperature storage tank cannot be satisfied.Most LNG low-temperature storage tanks are to use differential pressure first
Formula liquid level gauge measures liquid level, then calculates to obtain the capacity and quality of LNG in low-temperature storage tank by " liquid level-volume table of comparisons ".Differential pressure
The measuring principle of formula liquid level gauge is taken over by drawing gas respectively from tank bottom and top, by liquid level gauge measure top,
The pressure difference value (static pressure that fluid column generates i.e. in storage tank) of bottom nozzles, determines the liquid-column height (liquid level) in storage tank, then
It is scaled capacity according to storage tank geometry.According to the 15 low-temperature storage tank applications of certain LNG gas station as a result, this method error is universal
(error is 5~15mm) bigger than normal；Meanwhile horizontal tank is bigger than vertical storage tank error.Obvious, which can only reach reluctantly
Security monitoring rank, cannot be satisfied the requirement of inventory's accurate measurement at all, both be unfavorable for storage tank safety guarantee, also can not be to LNG
True inventory and loss situation make science and accurately judge.
Utility model content
The purpose of this utility model is to provide a kind of high-precision LNG storage tank capacitance level gauge.
To achieve the goals above, the utility model provides the following technical solutions：
A kind of high-precision LNG storage tank capacitance level gauge, including courage, tank liner, temperature sensor, level sensing outside tank
Device, temperature sensor wires, liquid level sensor lead, fluid level transmitter and height displaying instrument, the tank liner are arranged outside tank
In courage, the temperature sensor and liquid level sensor are arranged in tank liner, and the temperature sensor is drawn by temperature sensor
Line is connected with fluid level transmitter, and the liquid level sensor is connected by liquid level sensor lead with fluid level transmitter, described
Height displaying instrument is connected with fluid level transmitter.
The temperature sensor wires are connected by temperature outlet bulb sealed interface with fluid level transmitter, the liquid level
Sensor lead is connected by liquid level outlet bulb sealed interface with fluid level transmitter.
The fluid level transmitter includes that pedestal, glassy layer, measuring diaphragm, silicone oil, fixed electrode, isolation diaphragm and lead connect
Head, the glassy layer are arranged in pedestal, and the measuring diaphragm is arranged on glassy layer, and the isolation diaphragm is arranged in pedestal
Outside, the fixed electrode is arranged above glassy layer, silicone oil is provided between the fixed electrode and glassy layer, the lead connects
Head is connected with fixed electrode.
The beneficial effects of the utility model are：
The advantages of the utility model is：Simple in structure durable, the hardware installation in low-temperature storage tank is simple and exempts to tie up substantially
Shield；Measurement accuracy is higher, and when measurement is not influenced by cryogenic liquid physical parameter itself, also unrelated with tank inner pressure, can be accurate
It measures and monitors the liquid level in basin in real time；It is relatively low compared to other liquid level gauge costs.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic cross-sectional view of the utility model fluid level transmitter.
Specific implementation mode
The utility model is further described below in conjunction with attached drawing：
If Fig. 1 is to a kind of shown in Fig. 2, high-precision LNG storage tank capacitance level gauge, including courage 1, tank liner 2, temperature outside tank
Spend sensor 3, liquid level sensor 4, temperature sensor wires 5, liquid level sensor lead 6, fluid level transmitter 7 and height displaying instrument
8, the tank liner 2 is arranged outside tank in courage 1, and the temperature sensor 3 and liquid level sensor 4 are arranged in tank liner 2, described
Temperature sensor 3 is connected by temperature sensor wires 5 with fluid level transmitter 7, and the liquid level sensor 4 passes through level sensing
Device lead 6 is connected with fluid level transmitter 7, and the height displaying instrument 8 is connected with fluid level transmitter 7.
The temperature sensor wires 5 are connected by temperature outlet bulb sealed interface 9 with fluid level transmitter 7, described
Liquid level sensor lead 6 is connected by liquid level outlet bulb sealed interface 10 with fluid level transmitter 7.
The fluid level transmitter 7 includes pedestal 71, glassy layer 72, measuring diaphragm 73, silicone oil 74, fixed electrode 75, isolation
Diaphragm 76 and pigtail splice 77, the glassy layer 72 are arranged in pedestal 71, and the measuring diaphragm 76 is arranged on glassy layer 72,
The isolation diaphragm 76 is arranged outside pedestal, and the fixed electrode 75 is arranged glassy layer 72 above, the fixed electrode 75 and
Silicone oil 74 is provided between glassy layer 72, the pigtail splice 77 is connected with fixed electrode 75.
The operation principle of the utility model is：
Realized to the variation of 2 temperature of tank liner by the temperature sensor 3 and liquid level sensor 4 that are arranged in tank liner 2 and
The variation of liquid level, and exported by temperature sensor wires 5 and liquid level sensor lead 6, by fluid level transmitter 7, it is converted into
Electric signal is shown by height displaying instrument 8.The advantages of the utility model is：It is simple in structure durable, in low-temperature storage tank
Hardware installation is simple and substantially non-maintaining；Measurement accuracy is higher, and when measurement is not influenced by cryogenic liquid physical parameter itself, also with
Tank inner pressure is unrelated, can accurately measure and monitors the liquid level in basin in real time；It is relatively low compared to other liquid level gauge costs.
The above is not limit the technical scope of the present invention, all according to the utility model technical spirit
To any modification, equivalent variations and modification made by above embodiment, the model of the technical solution of the utility model is still fallen within
In enclosing.
Claims (3)
1. a kind of high-precision LNG storage tank capacitance level gauge, it is characterised in that：Including courage outside tank, tank liner, temperature sensor,
Liquid level sensor, temperature sensor wires, liquid level sensor lead, fluid level transmitter and height displaying instrument, the tank liner are set
It sets outside tank in courage, the temperature sensor and liquid level sensor are arranged in tank liner, and the temperature sensor passes through temperature
Sensor lead is connected with fluid level transmitter, and the liquid level sensor is connected by liquid level sensor lead with fluid level transmitter
It connects, the height displaying instrument is connected with fluid level transmitter.
2. a kind of high-precision LNG storage tank capacitance level gauge according to claim 1, it is characterised in that：The temperature passes
Sensor lead is connected by temperature outlet bulb sealed interface with fluid level transmitter, and the liquid level sensor lead passes through liquid level
Outlet bulb sealed interface is connected with fluid level transmitter.
3. a kind of high-precision LNG storage tank capacitance level gauge according to claim 1, it is characterised in that：The liquid level becomes
It includes pedestal, glassy layer, measuring diaphragm, silicone oil, fixed electrode, isolation diaphragm and pigtail splice, the glassy layer setting to send device
In pedestal, the measuring diaphragm is arranged on glassy layer, and the isolation diaphragm is arranged outside pedestal, the fixed electrode setting
Above glassy layer, silicone oil is provided between the fixed electrode and glassy layer, the pigtail splice is connected with fixed electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820218348.1U CN208012707U (en) | 2018-02-08 | 2018-02-08 | A kind of high-precision LNG storage tank capacitance level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820218348.1U CN208012707U (en) | 2018-02-08 | 2018-02-08 | A kind of high-precision LNG storage tank capacitance level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208012707U true CN208012707U (en) | 2018-10-26 |
Family
ID=63886085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820218348.1U Active CN208012707U (en) | 2018-02-08 | 2018-02-08 | A kind of high-precision LNG storage tank capacitance level gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208012707U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639828A (en) * | 2020-04-24 | 2021-11-12 | 西安定华电子股份有限公司 | Industrial parameter measuring system |
-
2018
- 2018-02-08 CN CN201820218348.1U patent/CN208012707U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639828A (en) * | 2020-04-24 | 2021-11-12 | 西安定华电子股份有限公司 | Industrial parameter measuring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220429 Address after: 510000 unit B on the 30th and 31st floor and unit a on the 32nd floor, No.3 Linjiang Avenue, Tianhe District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU DEVELOPMENT Group Inc. Patentee after: GUANGZHOU GAS GROUP Co.,Ltd. Patentee after: GUANGZHOU NANSHA DEVELOPMENT GAS Co.,Ltd. Address before: 510000 28-30 Floor, No. 3 Linjiang Avenue, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU DEVELOPMENT Group Inc. Patentee before: Guangzhou development natural gas utilization Co., Ltd |
|
| TR01 | Transfer of patent right |