CN110081948B - Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body - Google Patents
Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body Download PDFInfo
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- CN110081948B CN110081948B CN201910436302.6A CN201910436302A CN110081948B CN 110081948 B CN110081948 B CN 110081948B CN 201910436302 A CN201910436302 A CN 201910436302A CN 110081948 B CN110081948 B CN 110081948B
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- liquid phase
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- level meter
- heat conduction
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- 239000007791 liquid phase Substances 0.000 title claims abstract description 89
- 239000007788 liquid Substances 0.000 title claims abstract description 54
- 238000002309 gasification Methods 0.000 title claims abstract description 14
- 238000009413 insulation Methods 0.000 title claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000011229 interlayer Substances 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000012071 phase Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a liquid phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum heat-insulating tank body, which comprises a vacuum heat-insulating tank body, wherein one end of a liquid phase pipe of the liquid level meter is provided with a liquid phase pipe pressure-taking opening, the vacuum heat-insulating tank body consists of an inner container and an outer shell, the inner container comprises a cylinder body and a sealing head, a steady flow supporting plate for fixing the liquid phase pipe pressure-taking opening is arranged at the bottom of the cylinder body, the steady flow supporting plate comprises a bending piece, an opening is arranged on the bending piece, the liquid phase pipe pressure-taking opening of the liquid level meter can penetrate through the opening, a double-sided joint penetrating through the wall part of the sealing head is arranged at the lower part of the sealing head, a heat conduction copper wire is wound on the outer wall of the liquid phase pipe in a vacuum interlayer, two heat conduction columns are arranged at the inner wall of the outer shell, heat conduction plates are arranged between the heat conduction columns, and two ends of the heat conduction copper wire are wound on the heat conduction plates; the main aim of this structure is to solve the coexistence problem of gas and liquid in the liquid phase pressure tube of the liquid level meter, force to get to form single-phase gas in the pressure tube, ensure that differential pressure liquid level meter can normally work steadily, realize accurate measurement moreover.
Description
Technical Field
The invention relates to the field of liquid level meter pressure taking, in particular to a liquid phase gasification pressure taking structure of a differential pressure liquid level meter for a vacuum heat insulation tank body.
Background
The vacuum heat-insulating tank body is a movable pressure container tank body such as a low-temperature liquid tank car and a tank container, and is specially used for storing and transporting frozen liquefied gas. The actual degree of display of the liquid level in the tank is critical to its transportation operation. Currently, more level gauges are used, still being differential pressure gauges.
The liquid level measurement of the frozen liquefied gas has special difficulty compared with the liquid level measurement of normal temperature liquid because after the frozen liquefied gas flows out of the heat insulation tank body and enters the liquid phase pressure guiding pipe and the instrument which are exposed to the atmosphere, the gas-liquid coexistence phenomenon exists in the pipe by the heat transferred by the liquid phase pressure guiding pipe and the instrument, and the gas-liquid coexistence is unstable, and the tiny inducement can cause the liquid level in the pipe to vibrate greatly. In this case, the display of the gauge would be of no value.
Therefore, how to solve the above problems, the real situation of obtaining the information of the liquid level of the frozen liquefied gas as much as possible is a key technical problem to be studied by those skilled in the art.
Disclosure of Invention
In order to solve the problems, the invention discloses a liquid phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum heat insulation tank, which comprises a vacuum heat insulation tank and a differential pressure liquid level meter, wherein the differential pressure liquid level meter comprises a gauge head and a liquid phase pipe, one end of the liquid phase pipe is provided with a liquid phase pipe pressure-taking port, the vacuum heat insulation tank consists of an inner container and a shell, a vacuum interlayer is formed between the shell and the inner container, the inner container comprises a cylinder body and a sealing head arranged at one end of the cylinder body, the bottom of the cylinder body is provided with a steady flow supporting plate for fixing the liquid phase pipe pressure-taking port, the steady flow supporting plate comprises a bending piece, an opening is arranged on the bending piece, the liquid phase pipe pressure-taking port of the liquid level meter can penetrate through the opening, the liquid phase pipe pressure-taking port is fixed with the wall part of the opening through welding, the lower part of the sealing head is provided with a double-sided joint penetrating through the wall part of the liquid phase pipe can penetrate through the double-sided joint; the outer wall of the liquid phase tube in the vacuum interlayer is wound with a heat conduction copper wire, two heat conduction columns are arranged at the inner wall of the shell, a heat conduction plate is arranged between the heat conduction columns, and two ends of the heat conduction copper wire are wound on the heat conduction plate;
the liquid phase pipe penetrates through the wall part of the shell and is connected with the pressure leading port of the liquid level meter.
Preferably, the inner diameter of the liquid phase tube is 8-10mm.
Preferably, the heat conduction copper wire is a red copper solid copper wire with the diameter of 2-4 mm.
Preferably, the lower surface of the bending piece is concentrically provided with a cylindrical thin plate around the opening, and the wall part of the cylindrical thin plate is provided with a plurality of small holes.
Preferably, the diameter of the small holes is 1-2mm.
Preferably, the length of the liquid phase tube pressure taking port wall part from the cylindrical thin plate wall part is 3-4mm.
Preferably, the height of the liquid phase tube pressure taking port end face from the bottom of the cylindrical thin plate is 3-4mm, and the height of the liquid phase tube pressure taking port end face from the inner wall of the cylinder is 8-10mm.
Preferably, the small holes are provided obliquely or vertically in the wall portion of the cylindrical thin plate.
Preferably, the liquid phase pipe runs through the wall part of the shell and is provided with a double-sided joint, so that the tightness is more excellent, and the service life of the liquid level meter is prolonged.
Preferably, the differential pressure level gauge is a double bellows differential pressure gauge.
The invention has the beneficial effects that:
(1) According to the invention, the copper wire is wound on the liquid phase tube in the vacuum interlayer and is wound on the heat conducting plate to form the heat conduction structure, compared with the traditional mode, the structure of directly leading the copper wire to the wall part of the shell is more stable, repeated overhauling due to the fact that the structure is not firm is not needed, the heat conduction effect is guaranteed, meanwhile, the red copper solid copper wire is adopted as a heat conduction medium, and the heat conduction structure provides enough heat conduction quantity to force the liquid phase tube to form single-phase stable gas, so that the effect of accurate and stable liquid level display is realized.
(2) The liquid phase tube pressure taking opening is arranged towards the inner wall of the cylinder body, and the gap between the liquid phase tube pressure taking opening and the inner wall of the cylinder body is 8-10mm, meanwhile, the liquid phase tube pressure taking opening and the inner wall of the cylinder body are provided with a plurality of small holes, the liquid phase tube pressure taking opening has the function of filtering and stabilizing flow, the liquid phase tube pressure taking opening can enable the frozen liquefied gas to stably enter the liquid phase tube of the liquid level meter, fluctuation is not easy to be caused, impurities can be prevented from entering the liquid phase tube to cause blockage, the measuring precision of the liquid level meter is further improved, meanwhile, compared with the traditional mode, the liquid phase tube pressure taking opening is provided with small holes on the wall of the steel tube, the liquid phase tube pressure taking opening device is of a thin plate cylinder structure with small holes on the surface, the frozen liquefied gas entering is more uniform and stable, and the measuring effect is more stable.
(3) By setting the inner diameter of the liquid phase pipe to 8-10mm, the probability of ice blockage caused by residual water vapor in the pipe is reduced.
(4) Because the diameter of the small hole on the thin plate cylinder is 1-2mm, the size is smaller, the phenomenon of large fluid gushing or reflux is not easy to occur, and the safety is relatively high.
(5) The structure is convenient to operate, safe, reliable, low in manufacturing difficulty and low in cost, and is a simple, economical and practical pressure taking structure.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a part of the heat conduction structure of a liquid phase pressure taking port and a liquid phase pipe of the liquid level meter;
FIG. 3 is a schematic view of the structure of the steady flow support plate of the present invention;
in the figure, a 1-vacuum heat insulation tank body, a 2-shell, a 3-cylinder body, a 4-end socket, a 5-liquid phase pipe pressure taking port, a 6-steady flow supporting plate, a 601-bending piece, a 602-cylinder thin plate, 603-small holes, a 7-double-sided joint, an 8-liquid phase pipe, a 9-heat conduction copper wire, a 10-differential pressure liquid level meter and an 11-heat conduction plate.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, 2 and 3, a differential pressure liquid level meter liquid phase gasification pressure taking structure for a vacuum insulation tank body comprises a vacuum insulation tank body 1 and a differential pressure liquid level meter 10, wherein the differential pressure liquid level meter 10 comprises a gauge head and a liquid phase pipe 8, one end of the liquid phase pipe 8 is provided with a liquid phase pipe pressure taking port 5, the vacuum insulation tank body 1 consists of an inner container and an outer shell 2, a vacuum interlayer is formed between the outer shell 2 and the inner container, the inner container comprises a cylinder body 3 and a sealing head 4 arranged at one end of the cylinder body 3, a steady flow supporting plate 6 for fixing the liquid phase pipe pressure taking port 5 is arranged at the bottom of the cylinder body 3, the steady flow supporting plate 6 comprises a bending piece 601, an opening is arranged on the bending piece 601, the liquid phase pipe pressure taking port 5 can pass through the opening, the liquid phase pipe pressure taking port 5 is fixed with the opening wall part through welding, a double-sided joint 7 penetrating through the wall part of the sealing head 4 is arranged at the lower part of the sealing head 4, and the liquid phase pipe 8 can pass through the double-sided joint 7; the outer wall of the liquid phase tube 8 positioned in the vacuum interlayer is wound with a heat conduction copper wire 9, two heat conduction columns are arranged at the inner wall of the shell 2, a heat conduction plate 11 is arranged between the heat conduction columns, two ends of the heat conduction copper wire 9 are wound on the heat conduction plate 11, and the arrangement is firmer than that of directly welding the heat conduction copper wire on the shell 2, so that the frequent overhaul is avoided;
the liquid phase pipe 8 penetrates through the wall part of the shell 2 and is connected with the pressure leading joint of the liquid level meter 10.
In practice, the inner diameter of the liquid-phase tube 8 is preferably 10mm.
In specific implementation, the heat conduction copper wire 9 is a red copper solid copper wire with the diameter of 2-4mm, preferably 2mm.
Example 2
This embodiment is a further optimization based on embodiment 1, specifically, the lower surface of the bending member 601 is concentrically provided with a cylindrical thin plate 602 around the opening, and the wall of the cylindrical thin plate 602 is provided with a plurality of small holes 603.
In the specific implementation, the diameter of the small hole 603 is preferably 1.5mm, the small hole 603 on the thin plate cylinder has smaller diameter, and a large amount of fluid gushes or backflows phenomenon is not easy to occur, so that the method is safe.
Example 3
This example is a further optimization based on example 2, specifically, the length of the wall of the liquid phase tube pressure taking port 5 from the wall of the cylindrical thin plate 602 is 8-10mm.
The height of the end face of the liquid phase pipe pressure taking port 5 from the bottom of the cylindrical thin plate 602 is 10mm; the frozen liquefied gas stably enters the liquid phase tube 8 of the liquid level meter through the small holes 603 with the diameter of 1.5mm uniformly distributed on the cylindrical thin plate 602, so that the liquid entering through the small holes 603 is not easy to cause fluctuation, and the blockage caused by impurities entering the tube can be avoided; the liquid phase tube 8 of the liquid level meter adopts a stainless steel tube with the inner diameter of preferably 10mm, so that the probability of ice blockage caused by residual water vapor in the tube is reduced.
Example 4
The present embodiment is further optimized based on embodiment 3, specifically, the small holes 603 are obliquely or vertically arranged on the wall of the cylindrical thin plate 602, so that the liquid entering through the small holes is not easy to fluctuate, and the blockage caused by the impurities entering the pipe can be avoided, so that the differential pressure hydraulic press is more accurate.
Example 5
This embodiment is a further optimization made on the basis of embodiment 4, in particular that the liquid phase tube 8 is provided with a double-sided joint 7 at the wall portion penetrating the housing 2; the differential pressure level gauge 10 is a dual bellows differential pressure gauge.
When the liquid phase tube 8 is used, the liquid phase tube 8 is led out from the double-sided joint 7 welded at the lower part of the sealing head 4 into the vacuum interlayer, one end of the heat conduction copper wire 9 is wound on the liquid phase tube 8, and the other end is wound on the heat conducting plate 11 welded on the shell 2, so that a simple and effective heat conduction structure is formed, and enough heat conduction quantity is transmitted from the outside to force the liquid phase tube 8 of the liquid level meter to form single-phase stable gas, so that the effect of accurately and stably displaying the liquid level by the differential pressure liquid level meter 10 is realized; the liquid phase tube pressure taking port 5 of the liquid level meter is welded and fixed through a hole on the top of a bending piece 601 in a steady flow supporting plate 6 at the bottom of the cylinder body 3, a gap of 10mm is formed between the liquid phase tube pressure taking port and the inner wall of the cylinder body 3, frozen liquefied gas stably enters the liquid phase tube 8 of the liquid level meter through small holes 603 with the diameter of 1.5mm uniformly distributed on a cylinder thin plate 602, the liquid entering through the small holes 603 is not easy to cause fluctuation, and the phenomenon that impurities enter the tube to cause blockage can be avoided; the liquid phase tube 8 of the liquid level meter adopts a stainless steel tube with the inner diameter of 10mm, thereby reducing the probability of ice blockage caused by residual water vapor in the tube.
The above embodiments only describe the optimal use of the existing apparatus, but similar common mechanical means are used to replace the elements in the present embodiment, which all fall within the scope of protection.
Claims (8)
1. The utility model provides a pressure structure is got in differential pressure level gauge liquid phase gasification for vacuum insulation jar body, includes vacuum insulation jar body (1) and differential pressure level gauge (10), differential pressure level gauge (10) are including gauge outfit and liquid phase pipe (8), and the one end of this liquid phase pipe (8) is equipped with liquid phase pipe and gets pressure mouth (5), its characterized in that: the vacuum insulation tank body (1) consists of an inner container and an outer shell (2), a vacuum interlayer is formed between the outer shell (2) and the inner container, the inner container comprises a cylinder body (3) and a sealing head (4) arranged at one end of the cylinder body (3), a steady flow supporting plate (6) used for fixing a liquid phase pipe pressure taking port (5) is arranged at the bottom of the cylinder body (3), the steady flow supporting plate (6) comprises a bending piece (601), an opening is formed in the bending piece (601), the liquid phase pipe pressure taking port (5) can penetrate through the opening, the liquid phase pipe pressure taking port (5) is fixed with the opening wall through welding, a double-sided joint (7) penetrating through the wall of the sealing head (4) is arranged at the lower part of the sealing head, and a liquid phase pipe (8) can penetrate through the double-sided joint (7); the outer wall of the liquid phase tube (8) positioned in the vacuum interlayer is wound with a heat conduction copper wire (9), two heat conduction columns are arranged at the inner wall of the shell (2), a heat conduction plate (11) is arranged between the heat conduction columns, and two ends of the heat conduction copper wire (9) are wound on the heat conduction plate (11);
the liquid phase pipe (8) penetrates through the wall part of the shell (2) and is connected with the pressure leading port of the liquid level meter (10);
the inner diameter of the liquid phase pipe (8) is 8-10mm; the heat conduction copper wire (9) is a red copper solid copper wire with the diameter of 2-4 mm.
2. The liquid-phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum insulation tank according to claim 1, wherein the structure is characterized in that: the lower surface of the bending piece (601) is concentrically provided with a cylindrical thin plate (602) around the opening, and the wall part of the cylindrical thin plate (602) is provided with a plurality of small holes (603).
3. The liquid-phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum insulation tank according to claim 2, wherein the structure is characterized in that: the diameter of the small hole (603) is 1-2mm.
4. The liquid-phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum insulation tank according to claim 2, wherein the structure is characterized in that: the length of the wall part of the liquid phase tube pressure taking opening (5) from the wall part of the cylindrical thin plate (602) is 3-4mm.
5. The liquid-phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum insulation tank according to claim 2, wherein the structure is characterized in that: the height of the end face of the liquid phase pipe pressure taking port (5) from the bottom of the cylindrical thin plate (602) is 3-4mm, and the height of the end face of the liquid phase pipe pressure taking port (5) from the inner wall of the cylinder body (3) is 8-10mm.
6. The liquid-phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum insulation tank according to claim 2, wherein the structure is characterized in that: the small holes (603) are obliquely or vertically arranged on the wall part of the cylindrical thin plate (602).
7. The liquid-phase gasification pressure-taking structure of the differential pressure liquid level meter for the vacuum insulation tank as defined in claim 6, wherein the structure is characterized in that: the liquid phase pipe (8) penetrates through the wall part of the shell (2) and is provided with a double-sided joint (7).
8. The liquid-phase gasification pressure-taking structure of a differential pressure liquid level meter for a vacuum insulation tank according to any one of claims 1 to 7, wherein: the differential pressure liquid level meter (10) is a double-bellows differential pressure meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910436302.6A CN110081948B (en) | 2019-05-23 | 2019-05-23 | Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910436302.6A CN110081948B (en) | 2019-05-23 | 2019-05-23 | Liquid phase gasification pressure-taking structure of differential pressure liquid level meter for vacuum heat insulation tank body |
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| Publication Number | Publication Date |
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| CN110081948A CN110081948A (en) | 2019-08-02 |
| CN110081948B true CN110081948B (en) | 2024-01-30 |
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| CN113390487B (en) * | 2021-05-13 | 2024-02-13 | 中车长江运输设备集团有限公司 | Differential pressure type liquid level measurement system, low-temperature medium storage tank and tank truck |
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| CN109442206A (en) * | 2018-12-21 | 2019-03-08 | 张家港富瑞深冷科技有限公司 | A kind of vacuum insulation deep cooling pressure vessel |
| CN210119262U (en) * | 2019-05-23 | 2020-02-28 | 江西制氧机有限公司 | Differential pressure liquid level meter liquid phase gasification pressure taking structure for vacuum heat insulation tank body |
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