CN203551033U - Blowing type level gauge - Google Patents
Blowing type level gauge Download PDFInfo
- Publication number
- CN203551033U CN203551033U CN201320616748.5U CN201320616748U CN203551033U CN 203551033 U CN203551033 U CN 203551033U CN 201320616748 U CN201320616748 U CN 201320616748U CN 203551033 U CN203551033 U CN 203551033U
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- Prior art keywords
- short tube
- protective casing
- nitrogen
- blind flange
- pressure difference
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Abstract
The utility model discloses a blowing type level gauge, which comprises a pressure difference transmitter, a blind flange, a protective sleeve, a blowing tube, throttling devices, a short tube, a nitrogen main tube and nitrogen branch tubes. The blowing type level gauge has the advantages that a lot of adverse factors and difficulties, such as easy-to-solidify media containing vapour and solid impurities and buried equipment under pressure, are overcome, the liquid level of an underground dirty oil tank can be accurately measured, and the phenomenon of dirty oil spillage is prevented.
Description
Technical field
The utility model relates to a kind of liquid level emasuring device, particularly relate to a kind of easy coagulation medium and medium and contain water vapor and solid impurity, and equipment is equipment with pressure, is embedded in again the blowing type liquid level meter under the operating mode of inferior many unfavorable factors.
Background technology
At present, the easy coagulation medium that contains water vapor and solid impurity, and the equipment of this kind of medium of splendid attire is equipment with pressure, is embedded in again undergroundly, and under this operating mode, the liquid level of Measurement accuracy easy coagulation medium exists difficulty greatly.For example: the underground sump oil tank liquor of former Fischer-Tropsch synthesis unit position is used guide wave radar liquid level gauge to measure, often there is dead value and measure inaccurate phenomenon.Through lower ray examination, find to hang with solidifying wax on guide wave radar liquid level gauge guided wave bar, and guided wave bar there is the phenomenon of being bended, damage instrumentation, cannot normally measure.Former guide wave radar liquid level gauge can not meet measurement requirement, often causes sump oil to overflow.As use radar level gauge, ultrasonic level gage, because medium contains water vapor, water vapor condenses affects level gauging, and the discharging pump on equipment, also to liquid level in respect of interference, also cannot measure.As use differential pressure transmitter, float level meter, because equipment is to be embedded in undergroundly, cannot install, and medium is also with solid sundries, easily causes malleation to survey pressure tappings and stops up, and also cannot measure.
Utility model content
The purpose of this utility model is to provide a kind of blowing type liquid level meter.
The purpose of this utility model is implemented by following technical scheme, a kind of blowing type liquid level meter, and it comprises pressure difference transmitter, blind flange, protective casing, gas blow pipe, restriction device, short tube, nitrogen supervisor and nitrogen take-off pipe; The center of described blind flange offers the tapped through hole matching with described short tube, described protective casing is placed in the below of described blind flange, the corresponding described tapped through hole in one end of described protective casing is also welded on the lower surface of described blind flange, the top tube wall of described protective casing is provided with air hole, and air hole makes the external and internal pressure of described protective casing consistent; Described short tube is placed in the top of described blind flange, one end of described short tube is threaded with described tapped through hole, described gas blow pipe is sleeved in described short tube and described protective casing, between the outer wall of described gas blow pipe and described short tube top inwall, seal welding is connected, one end of described gas blow pipe is communicated with the malleation side of described pressure difference transmitter, the other end passes described protective casing and is inserted into device bottom, and described protective casing is for the protection of the described gas blow pipe that is inserted into device bottom; The side-wall hole of described short tube, described perforate is communicated with the suction side of described pressure difference transmitter; Described nitrogen supervisor is connected with one end of two described nitrogen take-off pipes respectively by threeway, the other end of two described nitrogen take-off pipes is communicated with the entrance of two described restriction devices respectively, the outlet of two described restriction devices is communicated with malleation side and the suction side of described pressure difference transmitter respectively, and described nitrogen supervisor is provided with described source of the gas ball valve.
By source of the gas ball valve, divide two-way to deliver to respectively two restriction devices the nitrogen of 0.5MPa.Restriction device is to utilize critical compression ratio constant current principle, the ratio of absolute pressure before absolute pressure and the restricting element of fluid after restricting element of flowing through is less than or equal to critical compression ratio, by the pressure medium after restriction device, with the pressure medium before restriction device, do not change, and there is unique constant flow output characteristics.Then the nitrogen by after restriction device is delivered to respectively to the positive/negative-pressure side of differential pressure transmitter, by regulating the flow of restriction device, make restriction device outlet have the bubble of emerging continuously, at this moment after throttling, the pressure of nitrogen approximates the pressure in connecting pipe exit, equals the pressure at pressure difference transmitter bellows place.Utilize the static balance principle of liquid to measure.Concrete application principle is shown in Fig. 2.
Be P
just=ρ gh+P
0
P
negative=P
0
Δ P=P
just-P
negative=ρ gh+P
0-P
0=ρ gh
?
h=ΔP/ρg
P in formula
justfor the pressure of differential pressure transmitter malleation side
P
negativefor the pressure of differential pressure transmitter suction side
P
0for the pressure on Sealing Arrangement top
Δ P is differential pressure transmitter institute error of measurement pressure
ρ by the density of survey medium
H by the vertical height of survey medium liquid level
The utility model has the advantage of, overcome easy coagulation medium and medium and contained water vapor and solid impurity, and equipment is equipment with pressure, be embedded in again inferior many unfavorable factors and difficulty, the underground sump oil tank liquor of Measurement accuracy position, has avoided the generation of sump oil tank boil-overs phenomenon.
Accompanying drawing explanation
Fig. 1 is blowing type liquid level meter structural representation.
Fig. 2 is blowing type liquid level meter application principle figure.
Pressure difference transmitter 1, blind flange 2, protective casing 3, gas blow pipe 4, perforate 5, short tube 6, nitrogen supervisor 7, nitrogen take-off pipe 8, air hole 9, source of the gas ball valve 10, restriction device 11.
Embodiment: a kind of blowing type liquid level meter, it comprises pressure difference transmitter 1, blind flange 2, protective casing 3, gas blow pipe 4, restriction device 11, short tube 6, nitrogen supervisor 7 and nitrogen take-off pipe 8; The center of blind flange 2 offers the tapped through hole matching with short tube 6, protective casing 3 is placed in the below of blind flange 2, the corresponding tapped through hole in one end of protective casing 3 is also welded on the lower surface of blind flange 2, the top tube wall of protective casing 3 is provided with air hole 9, and air hole 9 makes the external and internal pressure of protective casing 3 consistent; Short tube 6 is placed in the top of blind flange 2, one end of short tube 6 is threaded with tapped through hole, gas blow pipe 4 is sleeved in short tube 6 and protective casing 3, between the outer wall of gas blow pipe 4 and short tube 6 top inwalls, seal welding is connected, one end of gas blow pipe 4 is communicated with the malleation side of pressure difference transmitter 1, the other end passes protective casing 3 and is inserted into device bottom, and protective casing 3 is for the protection of the gas blow pipe 4 that is inserted into device bottom; The side-wall hole 5 of short tube 6, perforate 5 is communicated with the suction side of pressure difference transmitter 1, for the pressure at equipment top being guided to the suction side of differential pressure transmitter 1; Nitrogen supervisor 7 is connected with one end of two nitrogen take-off pipes 8 respectively by threeway, the other end of two nitrogen take-off pipes 8 is communicated with the entrance of two restriction devices 11 respectively, the outlet of two restriction devices 11 is communicated with malleation side and the suction side of pressure difference transmitter 1 respectively, and nitrogen supervisor 7 is provided with source of the gas ball valve 10.
Claims (1)
1. a blowing type liquid level meter, is characterized in that, it comprises pressure difference transmitter, blind flange, protective casing, gas blow pipe, restriction device, short tube, nitrogen supervisor and nitrogen take-off pipe; The center of described blind flange offers the tapped through hole matching with described short tube, described protective casing is placed in the below of described blind flange, the corresponding described tapped through hole in one end of described protective casing is also welded on the lower surface of described blind flange, and the top tube wall of described protective casing is provided with air hole; Described short tube is placed in the top of described blind flange, one end of described short tube is threaded with described tapped through hole, described gas blow pipe is sleeved in described short tube and described protective casing, between the outer wall of described gas blow pipe and described short tube top inwall, seal welding is connected, one end of described gas blow pipe is communicated with the malleation side of described pressure difference transmitter, and the other end passes described protective casing and is inserted into device bottom; The side-wall hole of described short tube, described perforate is communicated with the suction side of described pressure difference transmitter; Described nitrogen supervisor is connected with one end of two described nitrogen take-off pipes respectively by threeway, the other end of two described nitrogen take-off pipes is communicated with the entrance of two described restriction devices respectively, the outlet of two described restriction devices is communicated with malleation side and the suction side of described pressure difference transmitter respectively, and described nitrogen supervisor is provided with described source of the gas ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320616748.5U CN203551033U (en) | 2013-10-08 | 2013-10-08 | Blowing type level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320616748.5U CN203551033U (en) | 2013-10-08 | 2013-10-08 | Blowing type level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551033U true CN203551033U (en) | 2014-04-16 |
Family
ID=50469131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320616748.5U Expired - Lifetime CN203551033U (en) | 2013-10-08 | 2013-10-08 | Blowing type level gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551033U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801395A (en) * | 2018-08-03 | 2018-11-13 | 四川金象赛瑞化工股份有限公司 | A kind of thermal insulation clamp blows formula liquid level test structure and method |
| CN109945951A (en) * | 2019-04-04 | 2019-06-28 | 中冶焦耐(大连)工程技术有限公司 | System for measuring asphalt liquid level of reaction kettle and using method thereof |
| CN110530455A (en) * | 2019-09-25 | 2019-12-03 | 中国舰船研究设计中心 | A kind of liquid level measuring system and measurement method |
| CN113124958A (en) * | 2020-11-29 | 2021-07-16 | 华电水务元氏有限公司 | Novel pressure type liquid level meter |
| CN114166282A (en) * | 2021-12-07 | 2022-03-11 | 中国建筑材料科学研究总院有限公司 | Blowing type liquid level meter |
-
2013
- 2013-10-08 CN CN201320616748.5U patent/CN203551033U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801395A (en) * | 2018-08-03 | 2018-11-13 | 四川金象赛瑞化工股份有限公司 | A kind of thermal insulation clamp blows formula liquid level test structure and method |
| CN109945951A (en) * | 2019-04-04 | 2019-06-28 | 中冶焦耐(大连)工程技术有限公司 | System for measuring asphalt liquid level of reaction kettle and using method thereof |
| CN109945951B (en) * | 2019-04-04 | 2024-06-11 | 中冶焦耐(大连)工程技术有限公司 | A measurement system for asphalt liquid level in a reactor and a method for using the same |
| CN110530455A (en) * | 2019-09-25 | 2019-12-03 | 中国舰船研究设计中心 | A kind of liquid level measuring system and measurement method |
| CN113124958A (en) * | 2020-11-29 | 2021-07-16 | 华电水务元氏有限公司 | Novel pressure type liquid level meter |
| CN114166282A (en) * | 2021-12-07 | 2022-03-11 | 中国建筑材料科学研究总院有限公司 | Blowing type liquid level meter |
| CN114166282B (en) * | 2021-12-07 | 2024-04-26 | 中国建筑材料科学研究总院有限公司 | Blowing type liquid level meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
|
| CX01 | Expiry of patent term |