CN118225189A - Compact liquid metal flowmeter - Google Patents
Compact liquid metal flowmeter Download PDFInfo
- Publication number
- CN118225189A CN118225189A CN202211643099.8A CN202211643099A CN118225189A CN 118225189 A CN118225189 A CN 118225189A CN 202211643099 A CN202211643099 A CN 202211643099A CN 118225189 A CN118225189 A CN 118225189A
- Authority
- CN
- China
- Prior art keywords
- excitation
- excitation coil
- coil
- liquid metal
- fluid pipeline
- 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.)
- Pending
Links
- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 31
- 230000005284 excitation Effects 0.000 claims abstract description 53
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000006698 induction Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/586—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to the technical field of liquid metal measurement, and particularly discloses a compact liquid metal flowmeter. The flowmeter comprises an excitation unit and an electrode, and a signal processing unit, wherein the excitation unit comprises an excitation power supply, a first excitation coil and a second excitation coil, the first excitation coil is obliquely wound outside a fluid pipeline from left to right, the second excitation coil is obliquely wound outside the fluid pipeline from right to left, the first excitation coil and the second excitation coil are respectively connected with the excitation power supply, and the first excitation coil and the second excitation coil are powered by the excitation power supply; and an electrode is welded on the outer wall of the fluid pipeline and is connected with the signal processing unit. The flowmeter has the advantages of high temperature resistance, compact structure, small size, light weight and high precision.
Description
Technical Field
The invention belongs to the technical field of liquid metal measurement, and particularly relates to a compact liquid metal flowmeter.
Background
The liquid metal coolant has good thermal characteristics of large specific heat capacity, large heat conductivity, low melting point and high boiling point, is the optimal coolant type of the fast reactor at present, is one of core technologies for ensuring successful operation and safe control of a loop by online accurate measurement of high-temperature liquid metal flow, has wide liquid metal flow range and working temperature of more than 500 ℃, and increases corresponding size and weight of a permanent magnet when the conventional permanent magnet type liquid metal flowmeter is arranged in a large pipeline, thereby influencing convenience in installation and use. Meanwhile, the measurement accuracy is not high due to the demagnetization problem of the permanent magnet.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a compact liquid metal flowmeter for solving the problem of liquid metal flow detection.
In order to solve the problems, the technical scheme of the invention is as follows: the compact liquid metal flowmeter comprises an excitation unit and electrodes, wherein the excitation unit comprises an excitation power supply, a first excitation coil and a second excitation coil, the first excitation coil is obliquely wound outside a fluid pipeline from left to right, the second excitation coil is obliquely wound outside the fluid pipeline from right to left, the first excitation coil and the second excitation coil are respectively connected with the excitation power supply, and the first excitation coil and the second excitation coil are powered by the excitation power supply; and an electrode is welded on the outer wall of the fluid pipeline and is connected with the signal processing unit.
The exciting power supply adopts direct current power supply.
The electrode material is the same as the fluid conduit.
The first exciting coil and the second exciting coil are fixed and keep a winding gesture through a coil assembly, the coil assembly is sleeved on the outer wall of the fluid pipeline, the coil assembly comprises an inner framework and a shell, a wire slot is arranged between the inner framework and the shell, and the first exciting coil and the second exciting coil are fixed in the wire slot.
A support structure is disposed between the coil assembly and the fluid conduit.
And a heat insulation layer is laid between the coil assembly and the fluid pipeline.
The invention has the remarkable effects that: a compact liquid metal flowmeter provides a uniform magnetic field for fluid through a coil, so that when the fluid cuts a magnetic induction line, induced electromotive force is generated, and the liquid metal flow is obtained after conversion; the flowmeter has the advantages of high temperature resistance, compact structure, small size, light weight and high precision.
Drawings
FIG. 1 is a schematic view of a compact liquid metal flowmeter according to the present invention;
FIG. 2 is a longitudinal cross-sectional view of a compact liquid metal flowmeter according to the present invention;
In the figure: 1. an excitation power supply; 2. a first exciting coil; 3. a second exciting coil; 4. a fluid conduit; 5. a coil assembly; 6. a support structure; 7. a thermal insulation layer; 8. a signal processing unit; 9. an electrode; 10. an internal skeleton; 11. a housing.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent, and the embodiments described in detail, but not necessarily all, in connection with the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that the orientation or positional relationship indicated by "upper" or the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience and simplicity of description, and is not meant to indicate or imply that the apparatus or element to be referred to must be provided with a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "configured," "mounted," "secured," and the like are to be construed broadly and may be either fixedly connected or detachably connected, or integrally connected, for example; 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 skilled in the art according to the specific circumstances.
As shown in fig. 1-2, the compact liquid metal flowmeter comprises an excitation unit, a coil assembly 5 and an electrode 9, wherein the excitation unit comprises an excitation power supply 1, a first excitation coil 2 and a second excitation coil 3, the first excitation coil 2 is obliquely wound outside a fluid pipeline 4 from left to right, the second excitation coil 3 is obliquely wound outside the fluid pipeline 4 from right to left, and through the winding directions of the first excitation coil 2 and the second excitation coil 3, the transverse field components of magnetic fields generated by the two coils are mutually overlapped, and the axial solenoid field components are mutually offset, so that a uniform magnetic field in the vertical direction is generated in the fluid pipeline 4; the first exciting coil 2 and the second exciting coil 3 are respectively connected with the exciting power supply 1, the exciting power supply 1 supplies power to the first exciting coil 2 and the second exciting coil 3, and as an embodiment, the exciting power supply 1 adopts direct current power supply, so that eddy current generated by alternating current excitation is prevented from interfering a magnetic field;
As an embodiment, the first exciting coil 2 and the second exciting coil 3 are fixed and kept in a winding posture through a coil assembly 5, the coil assembly 5 is sleeved on the outer wall of the fluid pipeline 4, the coil assembly 5 comprises an inner framework 10 and a shell 11, a wire slot is arranged between the inner framework 10 and the shell 11, and the cross section of the wire slot is in an X shape, so that the wound first exciting coil 2 and second exciting coil 3 are fixed in the wire slot;
A supporting structure 6 is arranged between the coil assembly 5 and the fluid pipeline 4, and a heat insulation layer 7 is arranged between the coil assembly 5 and the fluid pipeline 4, so that the thermal shock of the high-temperature liquid metal to the exciting coil is reduced, and meanwhile, the heat loss of the liquid metal is reduced;
An electrode 9 is welded on the outer wall of the fluid pipeline 4, and the material of the electrode 9 is the same as that of the fluid pipeline 4; when the liquid metal does not flow in the fluid pipe 4, the magnetic induction lines are not cut, and the induced electromotive force on the electrode 9 is zero. When the liquid metal flows, the liquid metal cuts the magnetic induction lines to generate induced electromotive force, and the electrode 9 is provided with the induced electromotive force, and the size of the induced electromotive force is in direct proportion to the flowing speed of the liquid metal; the electrode 9 is connected with the signal processing unit 8, the signal processing module 8 collects the induced electromotive force signals on the electrode 9, and the signal processing module 8 converts the collected induced electromotive force signals to obtain liquid metal flow.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A compact liquid metal flowmeter, characterized by: the flowmeter comprises an excitation unit and an electrode (9), wherein the signal processing unit (8) comprises an excitation power supply (1), a first excitation coil (2) and a second excitation coil (3), the first excitation coil (2) is obliquely wound outside a fluid pipeline (4) from left to right, the second excitation coil (3) is obliquely wound outside the fluid pipeline (4) from right to left, the first excitation coil (2) and the second excitation coil (3) are respectively connected with the excitation power supply (1), and the first excitation coil (2) and the second excitation coil (3) are powered through the excitation power supply (1); an electrode (9) is welded on the outer wall of the fluid pipeline (4), and the electrode (9) is connected with the signal processing unit (8).
2. A compact liquid metal flowmeter as set forth in claim 1, wherein: the exciting power supply (1) adopts direct current power supply.
3. A compact liquid metal flowmeter as set forth in claim 1, wherein: the electrode (9) is made of the same material as the fluid pipeline (4).
4. A compact liquid metal flowmeter as set forth in claim 1, wherein: the first excitation coil (2) and the second excitation coil (3) are fixed through a coil assembly (5) and keep a winding gesture, the outer wall of the fluid pipeline (4) is sleeved with the coil assembly (5), the coil assembly (5) comprises an inner framework (10) and a shell (11), a wire slot is arranged between the inner framework (10) and the shell (11), and the first excitation coil (2) and the second excitation coil (3) are fixed in the wire slot.
5. A compact liquid metal flowmeter as set forth in claim 4, wherein: a support structure (6) is arranged between the coil assembly (5) and the fluid pipeline (4).
6. A compact liquid metal flowmeter as set forth in claim 4, wherein: a heat insulation layer (7) is arranged between the coil assembly (5) and the fluid pipeline (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211643099.8A CN118225189A (en) | 2022-12-20 | 2022-12-20 | Compact liquid metal flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211643099.8A CN118225189A (en) | 2022-12-20 | 2022-12-20 | Compact liquid metal flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118225189A true CN118225189A (en) | 2024-06-21 |
Family
ID=91507232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211643099.8A Pending CN118225189A (en) | 2022-12-20 | 2022-12-20 | Compact liquid metal flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118225189A (en) |
-
2022
- 2022-12-20 CN CN202211643099.8A patent/CN118225189A/en active Pending
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