EP4427005A1 - Verwendung einer legierung auf gallium basis als übertragungsflüssigkeit in einem druckmittler - Google Patents
Verwendung einer legierung auf gallium basis als übertragungsflüssigkeit in einem druckmittlerInfo
- Publication number
- EP4427005A1 EP4427005A1 EP22797690.9A EP22797690A EP4427005A1 EP 4427005 A1 EP4427005 A1 EP 4427005A1 EP 22797690 A EP22797690 A EP 22797690A EP 4427005 A1 EP4427005 A1 EP 4427005A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gallium
- alloy
- pressure
- transmission
- based alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 28
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052733 gallium Inorganic materials 0.000 title claims abstract description 24
- 239000012530 fluid Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000006023 eutectic alloy Substances 0.000 claims description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052753 mercury Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 230000005496 eutectics Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0046—Fluidic connecting means using isolation membranes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
- G01L19/0645—Protection against aggressive medium in general using isolation membranes, specially adapted for protection
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
- G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
- G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms
- G01L13/026—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms involving double diaphragm
Definitions
- the invention relates to the use of a gallium-based alloy, in particular a eutectic alloy, as a transmission fluid in a hydraulic pressure transmitter for determining a pressure in a process in which the process medium has a process temperature of ⁇ 400° C. and a process pressure to be measured of ⁇ 1 bar absolute.
- Diaphragm seals with hydraulic pressure transmission usually have a hydraulic path that extends between a process diaphragm and a pressure measurement cell, where the process diaphragm is exposed to a process medium whose pressure is to be determined.
- Oils, in particular silicone oils, are currently used as the transmission fluid in such diaphragm seals.
- the transmission fluid often does not behave according to the vapor pressure curve for the pure and native state, because due to reactions with impurities or with the surfaces that limit the hydraulic path, the transmission fluid can contain volatile decomposition products that can no longer be dissolved after outgassing.
- the object is achieved according to the invention by using a gallium-based alloy as a transmission fluid in a hydraulic pressure transmitter for determining a pressure in a process in which the process medium has a process temperature ⁇ 400° C. and a process pressure to be measured ⁇ 1 bar (absolute pressure) according to Claim 1.
- a gallium-based alloy in particular a eutectic alloy
- a transmission fluid in a hydraulic pressure transmitter for determining a pressure in a process in which the process medium has a process temperature of ⁇ 400° C. and a process pressure to be measured of ⁇ 1 bar absolute
- the alloy also has at least one other component in addition to gallium and the mixing ratio between gallium and the at least one other component is selected such that the alloy has a melting temperature below 20°C, in particular below 15°C.
- the use of a gallium-based alloy as a transmission fluid for a diaphragm seal is proposed, the composition of the alloy being selected in such a way that it has a high boiling point (approx. 2400° C. for gallium), so that the diaphragm seals filled with the alloy also above the usual process conditions for currently common diaphragm seals (process temperature ⁇ 400°C and process pressures to be measured > 1 bar (absolute pressure)).
- the alloy can have several other components and the mixing ratio between gallium and the several other components is selected such that the alloy has a melting point below 20°C, in particular below 15°C.
- a further advantageous variant of the invention provides that the further component or the further components are selected from a metal with a melting point below 450°C, preferably below 350°C.
- a further advantageous variant of the invention provides that the further component or the further components are selected from indium, tin, zinc, lead, bismuth and/or mercury.
- the alloy has at least 50 percent by mass, preferably at least 60 percent by mass, of gallium.
- FIG. 1 shows a longitudinal section through a pressure transmitter designed according to the invention.
- This comprises a sensor module 1 and a transmission module 2.
- the sensor module 1 comprises a sensor body 11 which can have cylindrical symmetry or some other axial symmetry at least in sections.
- Inside the sensor body 11 is a measuring cell chamber 15 with a pressure measuring cell 16 located therein, which is connected to a first end face of the sensor body 11 via a measuring cell channel 12 .
- the first end face 13 faces the transmission module 2 . It may also be bounded by an annular mounting wall 17 extending axially from the first face.
- the mounting wall 17 has a first mounting face 18 which, in a presently preferred embodiment, is planar.
- the first mounting face 18 is pressure-tightly connected to a matching second mounting face.
- the transmission module 2 comprises a process body 21 and a transmission body 22, which can each have cylindrical symmetry or rotational symmetry at least in sections.
- the symmetries mentioned are not essential for the invention, but they arise when the components of the pressure transmitter are manufactured as turned parts.
- the process body 21 and the transfer body 22 each have a continuous axial bore between their end faces, which are connected to one another in a pressure-tight manner, so that a capillary line 23 extends between the end faces of the process body and the transfer body that face away from one another.
- a flexible process diaphragm 24 is attached in a pressure-tight manner along its circumference to the sensor-side end face of the process body 21 , which faces away from the capillary line 23 .
- a process pressure chamber 29 which communicates with the capillary line 23 is formed between the process diaphragm 24 and the process body 21 .
- a flexible transmission membrane 25 is fastened in a pressure-tight manner along its circumference to the end face of the transmission body 22 which faces away from the capillary line 23 .
- a transfer pressure chamber 28 is formed between the transfer membrane 25 and the transfer body 22 , which communicates with the capillary line 23 and thereby with the process pressure chamber 29 .
- the process pressure chamber 29, the capillary 23 and the transfer pressure chamber 28 are filled with transfer liquid and form a first hydraulic path.
- the process diaphragm 24 can thus be exposed to a process medium, and the pressure of the medium is transmitted to the transmission diaphragm 25 by means of the transmission liquid.
- the sensor-side end face of the transmission body has the previously mentioned second mounting surface 26, to which the first mounting surface of the sensor module is welded in a pressure-tight manner.
- the measuring cell chamber 15 and the volume between this and the transmission membrane 25, ie the first hydraulic path, are also filled with the transmission fluid.
- the filling usually takes place after the sensor body has been connected to the transmission body along the first and second mounting surfaces.
- filling channels for filling the first and second hydraulic path with transmission fluid can be provided in the sensor module and in the transmission module. Details on the configuration of the filling channel and its closure are familiar to a person skilled in the art and do not require any further explanation.
- a gallium-based alloy with at least 50 percent by mass, preferably at least 60 percent by mass, gallium is used as the transmission fluid, which in addition to gallium also has at least one other component and the mixing ratio between gallium and the at least one other component is selected in such a way that the alloy has a melting temperature below 20°C, in particular below 15°C.
- the alloy is preferably an eutectic alloy.
- Possible further components or components are, in particular, metals with a melting point below 450° C., such as zinc (420° C.), particular preference is given to metals with a melting point below 350° C., such as indium (157° C.), Tin (232°C), lead (327°C), bismuth (271°C) and/or mercury (-38.8°C) can be considered, although it should be noted that mercury can always be considered as an additional component comes, but should not be used due to the toxicity.
- metals with a melting point below 450° C. such as zinc (420° C.)
- metals with a melting point below 350° C. such as indium (157° C.), Tin (232°C), lead (327°C), bismuth (271°C) and/or mercury (-38.8°C) can be considered, although it should be noted that mercury can always be considered as an additional component comes, but should not be used due to the toxicity.
- a pressure transmitter filled with the alloy as a transmission liquid can also be used in the vacuum applications mentioned at the beginning, i.e. in processes in which the process medium has a high temperature ( ⁇ 400° C) with low process pressures ( ⁇ 1 bar) at the same time.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021128735.9A DE102021128735A1 (de) | 2021-11-04 | 2021-11-04 | Verwendung einer Legierung auf Gallium Basis als Übertragungsflüssigkeit in einem Druckmittler |
| PCT/EP2022/076768 WO2023078616A1 (de) | 2021-11-04 | 2022-09-27 | Verwendung einer legierung auf gallium basis als übertragungsflüssigkeit in einem druckmittler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4427005A1 true EP4427005A1 (de) | 2024-09-11 |
Family
ID=84044553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22797690.9A Withdrawn EP4427005A1 (de) | 2021-11-04 | 2022-09-27 | Verwendung einer legierung auf gallium basis als übertragungsflüssigkeit in einem druckmittler |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250020530A1 (de) |
| EP (1) | EP4427005A1 (de) |
| CN (1) | CN118159818A (de) |
| DE (1) | DE102021128735A1 (de) |
| WO (1) | WO2023078616A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671394B (zh) * | 2016-01-22 | 2018-02-23 | 上海洛丁森工业自动化设备有限公司 | 镓液态金属材料及其在远传压力、差压变送器上的应用 |
| CN110970150B (zh) * | 2019-11-15 | 2021-05-28 | 南方科技大学 | 液态金属/聚合物复合材料及其制备方法和电子器件 |
| CN211651926U (zh) | 2019-12-09 | 2020-10-09 | 浙江洛丁森智能科技有限公司 | 用于高温熔体变送器的弹簧膜片装置和高温熔体变送器 |
| CN112629741A (zh) * | 2020-11-18 | 2021-04-09 | 上海申狮物联网科技有限公司 | 一种环保型高温熔体压力变送器 |
-
2021
- 2021-11-04 DE DE102021128735.9A patent/DE102021128735A1/de active Pending
-
2022
- 2022-09-27 EP EP22797690.9A patent/EP4427005A1/de not_active Withdrawn
- 2022-09-27 CN CN202280071519.1A patent/CN118159818A/zh active Pending
- 2022-09-27 US US18/706,992 patent/US20250020530A1/en active Pending
- 2022-09-27 WO PCT/EP2022/076768 patent/WO2023078616A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021128735A1 (de) | 2023-05-04 |
| CN118159818A (zh) | 2024-06-07 |
| US20250020530A1 (en) | 2025-01-16 |
| WO2023078616A1 (de) | 2023-05-11 |
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Legal Events
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| 17P | Request for examination filed |
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