CN115265711A - Be used for liquid level segmentation real-time measurement probe and device in narrow passageway of high temperature high pressure - Google Patents
Be used for liquid level segmentation real-time measurement probe and device in narrow passageway of high temperature high pressure Download PDFInfo
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- CN115265711A CN115265711A CN202210480381.2A CN202210480381A CN115265711A CN 115265711 A CN115265711 A CN 115265711A CN 202210480381 A CN202210480381 A CN 202210480381A CN 115265711 A CN115265711 A CN 115265711A
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- liquid level
- metal
- shielding electrode
- metal shell
- electrode block
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- 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
- G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
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- 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
- G01F23/0046—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 with a stationary probe, where a liquid specimen is separated from the mean mass and measured
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- 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
- G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
- G01F23/242—Mounting arrangements for electrodes
Abstract
The invention discloses a liquid level subsection real-time measuring probe and a device used in a high-temperature high-pressure narrow passage, wherein a single liquid level measuring probe is assembled and arranged in the narrow passage to be measured and is not contacted with the inner wall of the passage; the filling shielding electrode is made of 3D printing epoxy resin and is embedded into the slotted cylinder metal shell; and the metal electrode block is placed in a groove reserved for the filling shielding electrode and is embedded into the slotted cylindrical metal shell together with the filling shielding electrode.
Description
Technical Field
The invention relates to the technical field of multiphase flow parameter measurement, in particular to a segmented real-time liquid level measuring probe and a segmented real-time liquid level measuring device for a high-temperature high-pressure narrow channel.
Background
In the current industrial field related to multiphase flow and the scientific research of multiphase flow, the measurement of the liquid level in a narrow passage with high temperature and high pressure is often involved. In a narrow channel, on one hand, the liquid level is constantly and instantaneously changed, the change amplitude is large, and the requirement on the measurement precision is high; on the other hand, the narrow passage itself limits the application of most measuring devices or probes.
Current methods for measuring the level of a liquid mainly include manual measurement, non-contact measurement, and contact measurement. The manual measurement method mainly utilizes the principle of a communicating vessel, but the measurement precision is low. The non-contact measurement method mainly comprises the principles of light reflection and sound wave reflection, but the complexity of the measurement equipment is high, the signal processing is complex and the environment is easily influenced. The contact type measuring method mainly comprises float type measurement and probe type measurement, has simple principle, high precision and uncomplicated installation, is limited by the structure of a narrow channel, has different gas content measuring precision under different depth conditions in a high-temperature and high-pressure two-phase flow environment, and does not have an effective probe for accurately measuring the liquid level height in the narrow channel at present.
In summary, there is a need to develop a real-time measuring probe capable of measuring the height of the liquid level in the narrow passage at high temperature and high pressure to realize the segmented high-resolution measurement of the liquid level in the narrow passage.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a segmented real-time liquid level measuring probe and a device for a narrow passage with high temperature and high pressure, and solves the problem that no effective probe is available in the prior art for accurately measuring the height of the liquid level in the narrow passage.
In order to achieve the above purpose, the technical solution for solving the technical problem is as follows:
the invention discloses a liquid level subsection real-time measuring probe used in a high-temperature high-pressure narrow passage, wherein a single liquid level measuring probe is assembled and arranged in the narrow passage to be measured and is not contacted with the inner wall of the passage, the liquid level measuring probe comprises a slotted cylinder metal shell, a filling shielding electrode and a metal electrode block, wherein:
the slotted cylinder metal shell is formed by slotting and cutting a metal pipe from the position of one third of arc;
the filling shielding electrode is made of 3D printing epoxy resin and is embedded into the slotted cylinder metal shell;
and the metal electrode block is placed in a groove reserved for the filling shielding electrode and is embedded into the slotted cylindrical metal shell together with the filling shielding electrode.
Furthermore, the cross section of the filling shielding electrode is the same as the inner side cross section of the slotted cylinder metal shell, and a groove body for placing a metal electrode block and a wire hole are reserved during manufacturing.
Furthermore, the metal electrode block is placed in a groove body reserved in the filling shielding electrode, the filling shielding electrode is embedded into the grooved cylindrical metal shell, and the outer side of the metal electrode block, the outer side of the shielding electrode and the cutting surface of the grooved metal cylinder are in the same plane.
Furthermore, the metal electrode block is fixed inside the filling shielding electrode by a sealant.
Preferably, the slotted cylinder metal shell and the metal electrode block are both made of the same 304 stainless steel.
Furthermore, the slotted cylinder metal shell is not bent and deformed in the slotted cutting process, and the cutting line is not inclined.
The invention also discloses a device for sectionalized real-time measurement of the liquid level in the high-temperature high-pressure narrow passage, which comprises the probe for sectionalized real-time measurement of the liquid level in the high-temperature high-pressure narrow passage, a signal transmission lead and a signal receiver, wherein:
the metal electrode block, the filling shielding electrode and the slotted cylinder metal shell are sequentially and coaxially connected from bottom to top and are sequentially nested from inside to outside;
the grooved cylindrical metal shell and one side of the metal electrode block exposed outside form two poles of probe signal transmission together;
each metal electrode block is connected with the signal transmission lead and is connected to the signal receiver through a lead hole preset on the filling shielding electrode.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
the application provides a real-time accurate measurement probe of narrow passageway liquid level is applicable to in various narrow passageways, has realized the real-time accurate measurement of instantaneous change liquid level, has reduced the degree of difficulty of signal conversion and processing, and the measurement station is many, sensor sensitivity is high, the error is little, small, easy installation, non-maintaining, the system can get into normal operating condition rapidly, antistatic interference killing feature is strong. In addition, simple structure need not loaded down with trivial details operation, only needs connecting circuit can realize the signal acquisition to liquid level in the narrow passageway, easy operation, suitability are strong.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic structural diagram of a sectional real-time liquid level measuring probe used in a high-temperature high-pressure narrow passage according to the invention;
FIG. 2 is a schematic cross-sectional view of a segmented real-time liquid level measuring probe for a narrow passage with high temperature and high pressure according to the present invention.
[ description of main symbols ]
1-slotted cylindrical metal housing;
2-a metal electrode block;
3-filling a shielding electrode;
4-signal transmission conductors;
5-signal receiver.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 and 2, the invention discloses a liquid level subsection real-time measuring probe used in a high-temperature and high-pressure narrow passage, wherein a single liquid level measuring probe is assembled and arranged in the narrow passage to be measured and is not contacted with the inner wall of the passage, the liquid level measuring probe comprises a slotted cylinder metal shell 1, a filling shielding electrode 3 and a metal electrode block 2, wherein:
the slotted cylinder metal shell 1 is formed by slotting and cutting a metal pipe from a one-third arc position. In this embodiment, the slotted cylinder metal shell 1 is not bent and deformed during the slotting and cutting process, and the cutting line is not inclined.
The filling shielding electrode 3 is made of 3D printing epoxy resin and is embedded into the slotted cylinder metal shell 1;
the metal electrode block 2 is placed in a groove reserved for the filling shielding electrode 3 and is embedded into the slotted cylindrical metal shell 1 together with the filling shielding electrode 3.
Referring to fig. 2, the cross-sectional shape of the filled shielding electrode 3 is the same as the inner side cross-section of the slotted cylindrical metal shell 1, and a groove body and a wire guide hole for placing the metal electrode block 2 are reserved during manufacturing.
Further, the metal electrode block 2 is placed in a groove reserved in the filling shielding electrode 3, the filling shielding electrode 3 is embedded into the slotted cylinder metal shell 1, and the outer side of the metal electrode block 2, the outer side of the shielding electrode and a slotted metal cylinder cutting surface are in the same plane.
Furthermore, the metal electrode block 2 is fixed inside the filling shielding electrode 3 by a sealant, so that the stability of the structure is realized. In this embodiment, the number and size of the metal electrode blocks 2 may be changed according to actual measurement requirements and measurement accuracy.
Preferably, the slotted cylindrical metal housing 1 and the metal electrode block 2 are both made of the same 304 stainless steel.
In this embodiment, in order to obtain the best measurement data, the outer diameter of the slotted cylinder metal shell 1 is 4mm, and the length is 1m. The metal electrode block 2 is 2mm long, 1mm wide and 200mm high.
Example two
As shown in fig. 1 and 2, the present invention also discloses a segmented real-time liquid level measuring device in a high-temperature and high-pressure narrow passage, which comprises the segmented real-time liquid level measuring probe in the high-temperature and high-pressure narrow passage, a signal transmission wire 4 and a signal receiver 5, wherein:
the metal electrode block 2, the filling shielding electrode 3 and the slotted cylinder metal shell 1 are sequentially and coaxially connected from bottom to top, and are sequentially nested from inside to outside in the installation process to form a measuring probe main body;
the slotted cylinder metal shell 1 and the metal electrode block 2 are exposed at one side outside to form two poles for probe signal transmission;
each metal electrode block 2 is connected with the signal transmission lead 4 and is connected to the signal receiver 5 through a lead hole preset on the filling shielding electrode 3, so that signal transmission and reception are realized.
The following further elaborates on the operating principle of the level measurement probe:
(1) The working principle of the circuit is as follows:
the slotted cylinder metal shell 1 and the metal electrode block 2 are used as two poles of a circuit and form a passage together with liquid in a channel, so that the circuit is kept communicated. When more than two metal electrode blocks 2 contact water, the loops formed by the metal electrode blocks 2 are connected in parallel. The slotted cylinder metal shell 1, the metal electrode block 2 and the water in the contacted channel form a loop together. When the liquid level height in the channel changes, the contact length of the metal electrode block 2 where the liquid level corresponds to and water changes, the resistance value of a loop where the metal electrode block 2 is located changes due to the volume change of the contacted liquid, the change of the output current signal value and the change of the resistance value are in a linear relation, and the linear correlation between the output current signal value and the liquid level height is realized. And the loops corresponding to the metal electrode blocks 2 all operate independently, each loop outputs an electric signal value in the actual measurement process, and the final liquid level height is the sum of the height values of all the metal electrode blocks 2 corresponding to the loops after electric signal conversion. In this example, the corresponding relation between the current output signal value and the height value is obtained through a calibration experiment, and each metal electrode block 2 needs to be calibrated independently. Therefore, the probe outputs electrical signals during the measurement process, the current signal value of each metal electrode block 2 is output and stored in the computer after passing through the liquid to be measured, and the actual liquid level height is obtained by substituting the current signal value into a calibrated conversion formula. According to a specific example, the number of frames for collecting data may be specified.
(2) Base value calibration:
before the liquid level in the channel is measured, the liquid level measuring probe is placed in a calibration model with known liquid level height, and then the collection process is kept for a specified number of frames. The average value of the collected signals is calculated as follows:
in the formula: i is the collected initial signal current (unit A); I.C. A0The initial signal current average value; k is the number of acquisition frames, and n is the total number of frames.
When the liquid level is not in contact with the metal electrode block 2, the electric signal value of the corresponding loop of the metal electrode block 2 is a zero signal value, the electric signal value of the corresponding loop of the metal electrode block 2 with the liquid level over is a full signal value, and the zero signal and the full signal respectively correspond to the height values of the bottom and the top of the metal electrode block 2. Therefore, the calibration relational expression of the metal electrode block 2 can be obtained, and the total relational expression can be obtained by performing repeated calibration experiments on all the metal electrode blocks 2.
(3) In the actual measurement process, the recorded electric signal values of all the metal electrode blocks 2 are stored and converted into actual height values in a one-to-one correspondence mode, and the final liquid level height is the sum of the actual height values.
The segmented real-time liquid level measuring probe in the narrow channel provided by the embodiment is suitable for various narrow channel high-temperature and high-pressure environments, and realizes real-time and accurate measurement of instantaneously-changed liquid levels; the difficulty of signal conversion and processing is reduced; the sensor has the advantages of multiple measuring points, high sensitivity, small error, small volume, easy installation, no maintenance, capability of rapidly entering a normal working state, and strong antistatic and anti-interference capability. Simple structure need not loaded down with trivial details operation, only needs connecting circuit can realize the signal acquisition to liquid level in the narrow passageway, easy operation, suitability are strong.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a real-time measuring probe of liquid level segmentation in being used for high temperature high pressure narrow passageway, single liquid level measuring probe assembly sets up at the narrow passageway inside of awaiting measuring not with the contact of passageway inner wall, a serial communication port, the liquid level measuring probe includes fluting drum metal casing, fills shielded electrode and metal electrode piece, wherein:
the slotted cylinder metal shell is formed by slotting and cutting a metal pipe from the position of one third of arc;
the filling shielding electrode is made of 3D printing epoxy resin and is embedded into the slotted cylinder metal shell;
and the metal electrode block is placed in a groove reserved for the filling shielding electrode and is embedded into the slotted cylindrical metal shell together with the filling shielding electrode.
2. The probe for measuring the liquid level in the high-temperature high-pressure narrow passage in the segmented real-time manner as claimed in claim 1, wherein the cross section of the filling shielding electrode is the same as the inner side cross section of the slotted cylindrical metal shell, and a groove body for placing a metal electrode block and a wire guide hole are reserved during manufacturing.
3. The segmented real-time liquid level measuring probe used in the high-temperature high-pressure narrow passage as claimed in claim 2, wherein the metal electrode block is placed in a groove reserved in the filling shielding electrode, the filling shielding electrode is embedded in the grooved cylindrical metal shell, and the outer side of the metal electrode block, the outer side of the shielding electrode and the cutting surface of the grooved metal cylinder are in the same plane.
4. The segmented real-time liquid level measuring probe for the high-temperature and high-pressure narrow passage as claimed in claim 1, wherein the metal electrode block is fixed inside the filling and shielding electrode by a sealant.
5. The segmented real-time liquid level measuring probe used in the high-temperature high-pressure narrow passage as claimed in claim 1, wherein the slotted cylinder metal shell and the metal electrode block are made of the same 304 stainless steel.
6. The segmented real-time liquid level measuring probe used in the high-temperature high-pressure narrow passage as claimed in claim 1, wherein the slotted cylinder metal shell is not bent and deformed during the slotting process, and the cutting line is not inclined.
7. A segmented real-time measuring device for liquid level in a high-temperature high-pressure narrow passage, which is characterized by comprising the segmented real-time measuring probe for liquid level in the high-temperature high-pressure narrow passage, a signal transmission lead and a signal receiver of any one of claims 1 to 6, wherein:
the metal electrode block, the filling shielding electrode and the slotted cylinder metal shell are sequentially and coaxially connected from bottom to top and are sequentially nested from inside to outside;
the slotted cylinder metal shell and one side of the metal electrode block exposed outside form two poles for probe signal transmission;
each metal electrode block is connected with the signal transmission lead and is connected to the signal receiver through a lead hole preset on the filling shielding electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210480381.2A CN115265711A (en) | 2022-05-05 | 2022-05-05 | Be used for liquid level segmentation real-time measurement probe and device in narrow passageway of high temperature high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210480381.2A CN115265711A (en) | 2022-05-05 | 2022-05-05 | Be used for liquid level segmentation real-time measurement probe and device in narrow passageway of high temperature high pressure |
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| Publication Number | Publication Date |
|---|---|
| CN115265711A true CN115265711A (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210480381.2A Pending CN115265711A (en) | 2022-05-05 | 2022-05-05 | Be used for liquid level segmentation real-time measurement probe and device in narrow passageway of high temperature high pressure |
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| Country | Link |
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| CN (1) | CN115265711A (en) |
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- 2022-05-05 CN CN202210480381.2A patent/CN115265711A/en active Pending
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