Pressure detection device of differential pressure levelmeter for cryogenic liquid storage tank
A technology of differential pressure level gauge and cryogenic liquid, which is applied in the field of differential pressure level gauge, and can solve problems such as condensation, affecting the correct indication of the pointer of the level gauge, and frosting on the surface of the indicator panel.
Active Publication Date: 2013-02-13
CSSC SHENGHUI EQUIP
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Problems solved by technology
On the other hand, if the supercooled low-temperature gas-liquid mixed medium enters the liquid level gauge, it will also cause frost and condensation on the surface of the indicating panel, which will seriously affect the correct indication of the pointer of the liquid level gauge
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[0014] The structure of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0015] Such as figure 1 As shown, the pressure-taking device for the differential pressure level gauge of the cryogenic liquid storage tank includes a base 1 whose lower part is arranged in the insulating layer 11 at the bottom of the cryogenic liquid storage tank 10. The base 1 is provided with mounting holes, and the mounting holes A damping tube 2 is arranged inside, and a 45° slope is cut on both sides of the top of the damping tube 2. The bottom of the mounting hole on the base 1 is provided with an axial blind hole 3, and the side wall at the bottom of the axial blind hole 3 is provided with a radial guide. The pressure hole 4 and the bottom of the base 1 are provided with a heat conduction copper wire as a heat conductor 5 . The base 1 is provided with an installation step 9 for positioning the damping cover 6, the installation step 9...
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The invention discloses a pressure detection device of a differential pressure levelmeter for a cryogenic liquid storage tank. The device comprises a base having its lower part arranged in the bottom insulating layer of the cryogenic liquid storage tank, a mounting hole is arranged in the base, a damper tube is arranged in the mounting hole, an inclined face is formed at each of two sides of the top of the damper tube, an axial blind hole is arranged at the bottom of the mounting hole in the base, a radial pressure hole is arranged on the sidewall of the bottom of the axial blind hole, a heat conductor is arranged at the bottom of the base, a damping cover for covering the damper tube is arranged on the base, a blind hole with a conical bottom is axially arranged in the damping cover, and plural liquid inlet holes communicated with the blind hole are circumferentially arranged at the bottom of the damping cover. The invention ensures accurate measurement of the level of cryogenic liquid stored in the cryogenic liquid storage tank, is free from the influence of the mounting position of the differential pressure levelmeter, and does no low-temperature harm to levelmeter measurement.
Description
technical field [0001] The invention relates to a differential pressure liquid level gauge, in particular to a pressure-taking device for a differential pressure liquid level gauge used in a cryogenic liquid storage tank. Background technique [0002] Cryogenic liquids (such as LNG, LN 2 ) storage temperature is generally below -150°C, and its storage container is a double-jacketed vacuum insulated storage tank. At present, most of them use differential pressure liquid level gauges for liquid level measurement. The gas phase pressure and the pressure signal of the liquid at the lowest liquid level point at the bottom are measured through the two bellows pressure sensing chambers of the differential pressure gauge (the low pressure chamber communicates with the gas phase space at the top of the storage tank; the high pressure chamber communicates with the lowest liquid phase at the bottom of the storage tank). The pressure difference between the two points---that is, the sta...
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IPC IPC(8): G01F23/14
Inventor 陈来生叶勇陈保风
Owner CSSC SHENGHUI EQUIP