CN112649039A - Multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection and manufacturing method thereof - Google Patents
Multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection and manufacturing method thereof Download PDFInfo
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- CN112649039A CN112649039A CN202011227023.8A CN202011227023A CN112649039A CN 112649039 A CN112649039 A CN 112649039A CN 202011227023 A CN202011227023 A CN 202011227023A CN 112649039 A CN112649039 A CN 112649039A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/16—Elements for restraining, or preventing the movement of, parts, e.g. for zeroising
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection and a manufacturing method thereof. Each conductive probe consists of an outer sleeve, an inner sealing layer, an inner fixing frame and four metal needles. The probe can be used for measuring multiphase flow parameters such as void fraction, interface speed, interface area concentration and the like in a rectangular channel, a circular tube channel, a rod bundle channel and various special-shaped channels under the conditions of high temperature and high pressure.
Description
Technical Field
The invention belongs to the technical field of multi-phase flow detection.
Background
The conductance probe realizes the detection of various parameters of multiphase flow by the needle head according to the principle that the materials of the needle head region in the multiphase flow are different and the resistance between the needle head and the outer sleeve is also different. In actual measurement, the probe needs to be inserted into the multiphase fluid, the outer metal sleeve is connected to the ground level, and the four pins are connected to the signal acquisition card. If the needle head area is a substance with small resistance, the signal measured on the needle is a low level, and if the needle head area is a substance with large resistance, the signal measured on the needle is a high level, and parameters such as cavitation bubble fraction, interface speed, interface area concentration and the like of the multiphase flow can be measured according to the change condition of the measurement signal.
However, because of the small size of the conductivity probe, the processing method directly determines the service life of the probe head, the signal quality and the sealing structure of the multiphase flow pipeline. Especially, in a high-temperature and high-pressure environment, the general manufacturing method cannot meet the requirement for enabling the electric conduction probe to be resistant to high temperature and high pressure. Therefore, the invention realizes the conductive probe which can be used in high-temperature and high-pressure environment by using the design method and the processing method with tiny size for integrally forming the high-temperature and high-pressure structure such as the stainless steel outer sleeve, the metal needle coated with the high-temperature and high-pressure insulating coating, the ceramic sleeve to realize the bracket, the high-temperature glue sealing method and the like.
Disclosure of Invention
The invention aims to provide a multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection, which is characterized by comprising a plurality of metal probes, a sealing layer, a fixing frame I and an outer sleeve.
The metal probe and the outer sleeve are bent. The metal probe penetrates into the outer sleeve. The needle point of the metal probe is a detection end, and the needle tail is a wiring end. The detection end and the wiring end are positioned outside the outer sleeve.
The fixing frame I and the fixing frame II are provided with through holes for the metal probes to pass through, and the number of the through holes is equal to that of the metal probes.
The fixing frame I and the fixing frame II are respectively inserted into the outer sleeve from two ends of the outer sleeve, and the metal probe penetrates through the through hole.
After the metal probe, the fixing frame I and the fixing frame II penetrate into the outer sleeve, a sealing layer is filled in the space in the outer sleeve.
Further, the metal probe has an insulating coating resistant to high temperature. The coating does not cover the probe end of the needle tip and the terminal end of the needle tail.
Further, the metal probes have four.
Further, one of the metal probes is longer than the other metal probes.
Further, the metal probe is integrally formed.
Further, the outer sleeve is an integrally formed steel pipe.
Further, the fixing frame I and the fixing frame II are ceramic rods.
Further, the metal probe and the outer sleeve are both bent to 90 degrees.
Further, the sealing layer is made of high-temperature-resistant sealant.
The invention also discloses a method for manufacturing the multi-probe conductance probe, which comprises the following steps:
passing a plurality of metal probes through the outer sleeve.
And 2, injecting materials for forming a sealing layer into the inner cavity of the outer sleeve and the through holes of the fixing frame I and the fixing frame II.
The needle points of a plurality of metal probes penetrate into the fixing frame I, and the fixing frame I penetrates into a pipe orifice of the outer sleeve.
And 4, penetrating the tail ends of the plurality of metal probes into a fixing frame II, and penetrating the fixing frame II into the other pipe orifice of the outer sleeve.
And 5, forming the sealing layer filled in the outer sleeve after the material for forming the sealing layer is solidified.
The invention has the technical effects that:
1) by adopting the method of the integral straight-through of the metal needles with the diameter of 0.2mm, the welding joints for extending and connecting the probes are avoided, and the four metal probes can be arranged in the metal sleeve with the inner diameter smaller than 2.4 mm.
2) The metal needles are insulated from each other and from the outer stainless steel sleeve in the installation and use processes by coating the high-temperature coating on the surfaces of the metal needles.
3) The integral outer stainless steel sleeve is manufactured by a method of heating and bending by using a grinding tool, so that defects caused by welding of the outer sleeve are avoided, and the high-pressure resistance of 4MPa is realized.
4) By using the method of injecting glue first and then installing the metal needle and the ceramic sleeve, the problem of incomplete sealing caused by glue injection after installation is avoided.
Drawings
FIG. 1 is a cross-sectional view of a probe of the present invention;
FIG. 2 is a partial enlarged view of the portion L;
FIG. 3 is a schematic diagram of a probe of example 3;
FIG. 4 is a schematic view of the structure of the outer sleeve;
FIG. 5 is a schematic structural view of a fixing frame I;
fig. 6 is a schematic structural view of the fixing frame II.
In the figure: the probe comprises a metal probe (1), a metal probe I (101), a metal probe II (102), a metal probe III (103), a metal needle IV (104), a sealing layer (2), a fixing frame I (301), a fixing frame II (302) and an outer sleeve (4).
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1, a four-probe conductance probe for high-temperature and high-pressure two-phase flow detection is characterized by comprising four metal probes 1, a sealing layer 2, a fixing frame I301, a fixing frame II302 and an outer sleeve 4. The probe can be used for measuring multiphase flow parameters such as void fraction, interface speed, interface area concentration and the like in a rectangular channel, a circular tube channel, a rod bundle channel and various special-shaped channels under the conditions of high temperature and high pressure.
The metal probe 1 and the outer sleeve 4 are both bent to 90 degrees. The metal probe 1 penetrates into the outer sleeve 4. The needle point of the metal probe 1 is a detection end, and the needle tail is a wiring end. The probe end and the terminal end are located outside the outer sleeve 4. The metal probe 1 has an insulating coating (double-layer polytetrafluoroethylene coating, ultimate high temperature resistance 300 degrees) resistant to high temperature. The coating does not cover the probe end of the needle tip and the terminal end of the needle tail. The four metal probes 1 have high temperature resistance under the condition of ensuring the insulation by using an insulating high-temperature coating method.
The fixing frame I301 and the fixing frame II302 are provided with metal probes 1 which pass through, and the number of the metal probes 1 is equal to that of the metal probes 1
Of (3) a through-hole. The fixing frame I301 and the fixing frame II302 are ceramic rods.
The fixing frame I301 and the fixing frame II302 are respectively inserted into the outer sleeve 4 from both ends of the outer sleeve 4, and the metal probe 1 is made to pass through the through hole.
After the metal probe 1, the fixing frame I301 and the fixing frame II302 penetrate into the outer sleeve 4, the space in the outer sleeve 4 is filled with the sealing layer 2. The sealing layer 2 is made of high-temperature-resistant sealant (JL-528 high-temperature-resistant powerful AB glue, the limit temperature resistance is 300 ℃).
The four metal needles of the embodiment are connected with the rear-end signal acquisition system by a method of directly penetrating through a 90-degree elbow without welding, so that the difficulty of mounting the needles in a tiny outer stainless steel sleeve by multi-point welding can be avoided, and the insulation between the needles and the diameter of the outer sleeve is also ensured by the high-temperature-resistant insulating coating on the outer surface of the integrated metal needle; in the processing of the inner sealing layer, high-temperature glue is injected into the ceramic sleeve firstly, then the inner supporting frame and the four metal needles are fixed, and the sealant is injected into gaps between the metal needles and the ceramic support and between the outer sleeve and the ceramic support through extrusion, so that the inner sealing of the whole probe is ensured to be complete.
Example 2:
the main structure of this embodiment is the same as that of embodiment 1, and further, as shown in fig. 3, the fixing frame I301 protrudes out of the outer sleeve 4 to form a ball head, and the four metal probes 1 are located on the ball head and respectively marked as: metal probe I101, metal probe II102, metal probe III103 and metal probe IV 104.
The metal probe I101, the metal probe II102, the metal probe III103 and the metal needle IV104 are arranged in a cross shape when viewed from the end face (perpendicular to the orifice of the outer tube 4). The length of the metal probe III103 is longer than that of the other metal probes 1, that is, the tips of the metal probes I101, II102, and IV104 are on a plane a, and the tip of the metal probe III103 is below the plane a (the side away from the outer sleeve 4 is below).
In this embodiment, the outer sleeve 4 is an integrally formed seamless stainless steel tube with an inner diameter of 2.4 mm.
The metal probe 1 is an integrally formed non-welded metal probe with the diameter of 0.2 mm.
The probe of the embodiment can be used for multi-phase flow detection under the environment of high temperature of 250 ℃ and high pressure of 4 MPa.
Example 3:
the embodiment discloses a method for manufacturing the four-probe conductance probe in embodiment 1 or 2, which is characterized by comprising the following steps:
1, four metal probes 1 penetrate into an outer sleeve 4. The sizes of the metal probe 1 and the outer sleeve 4 are determined according to actual requirements. The outer sleeve 4 made of stainless steel realizes 90-degree bending by using a method of heating and bending by using a grinding tool, so that the integral outer sleeve is realized, and the defects possibly brought in the welding process of the outer sleeve are avoided, so that the high-pressure sealing environment is damaged. The metal probe 1 is made by coating a coating which can resist the high temperature of 250 ℃ on the surface of a stainless steel needle with the diameter of 0.2 mm.
The 90-degree bent metal probe 1 has certain elasticity and is thin. After one end of the metal probe 1 is inserted into one pipe orifice of the outer sleeve 4, the bent part of the metal probe 1 can be elastically deformed, so as to go out of the other pipe orifice of the outer sleeve 4.
Injecting the material for forming the sealing layer 2 into the inner cavity of the outer sleeve 4 and the through holes of the fixing frame I301 and the fixing frame II 302. The method comprises the steps of firstly injecting high-temperature glue into a ceramic sleeve, then fixing an inner support frame and four metal needles, and injecting sealant into gaps between the metal needles and the ceramic support and between an outer sleeve and the ceramic support through extrusion, so that the sealing in the sleeve can be guaranteed to the maximum degree, and the condition of incomplete sealing caused by glue injection after installation is avoided.
The needle points of a plurality of metal probes 1 penetrate into a fixing frame I301, and the fixing frame I301 penetrates into a pipe orifice of an outer sleeve 4.
The tail ends of a plurality of metal probes 1 penetrate into a fixing frame II302, and the fixing frame II302 penetrates into the other pipe orifice of the outer sleeve 4.
After the material for forming the sealing layer 2 is solidified, the sealing layer 2 filled in the outer jacket 4 is formed.
The high-pressure-resistant structure formed by the method ensures the high-pressure-resistant strength of the shell; the internal fixing frame is sleeved on the four metal needles by using ceramic sleeves, so that the strength of an internal structure and the insulation between the metal needles are ensured; the inner sealing layer is sealed by high-temperature glue and fills gaps between the ceramic tube and the outer sleeve and gaps between the ceramic tube and the four metal needles.
Claims (10)
1. A multi-probe conductance probe for high-temperature and high-pressure two-phase flow detection is characterized by comprising a plurality of metal probes (1), a sealing layer (2), a fixing frame I (301), a fixing frame II (302) and an outer sleeve (4);
the metal probe (1) and the outer sleeve (4) are both bent; the metal probe (1) penetrates into the outer sleeve (4); the needle point of the metal probe (1) is a detection end, and the needle tail is a wiring end; the detection end and the wiring end are positioned outside the outer sleeve (4);
the fixing frame I (301) and the fixing frame II (302) are respectively provided with through holes for the metal probes (1) to pass through, and the number of the through holes is equal to that of the metal probes (1);
the fixing frame I (301) and the fixing frame II (302) are respectively inserted into the outer sleeve (4) from two ends of the outer sleeve (4), and the metal probe (1) passes through the through hole;
after the metal probe (1), the fixing frame I (301) and the fixing frame II (302) penetrate into the outer sleeve (4), the space in the outer sleeve (4) is filled with the sealing layer (2).
2. The multi-probe conductance probe for high-temperature high-pressure two-phase flow probing according to claim 1, wherein: the metal probe (1) is provided with a high-temperature-resistant insulating coating; the coating does not cover the probe end of the needle tip and the terminal end of the needle tail.
3. A multi-probe conductance probe for high temperature and high pressure two-phase flow probing according to claim 1 or 2, wherein: the metal probe (1) has four.
4. The multi-probe conductance probe for high-temperature high-pressure two-phase flow probing according to claim 1, wherein: the length of one metal probe (1) is longer than that of the other metal probes (1).
5. A multi-probe conductance probe for high temperature and high pressure two-phase flow probing according to claim 1 or 3, wherein: the metal probe (1) is integrally formed.
6. The multi-probe conductance probe for high-temperature high-pressure two-phase flow probing according to claim 1, wherein: the outer sleeve (4) is an integrally formed steel pipe.
7. The multi-probe conductance probe for high-temperature high-pressure two-phase flow probing according to claim 1, wherein: the fixing frame I (301) and the fixing frame II (302) are ceramic rods.
8. The multi-probe conductance probe for high-temperature high-pressure two-phase flow probing according to claim 1, wherein: the metal probe (1) and the outer sleeve (4) are both bent to 90 degrees.
9. The multi-probe conductance probe for high-temperature high-pressure two-phase flow probing according to claim 1, wherein: the sealing layer (2) is made of high-temperature-resistant sealant.
10. A method of manufacturing a multi-probe conductivity probe according to any of claims 1 to 9, comprising the steps of:
1, penetrating a plurality of metal probes (1) into an outer sleeve (4);
injecting materials for forming a sealing layer (2) into the inner cavity of the outer sleeve (4) and the through holes of the fixing frame I (301) and the fixing frame II (302);
the needle points of a plurality of metal probes (1) penetrate into a fixing frame I (301), and the fixing frame I (301) penetrates into a pipe orifice of an outer sleeve (4);
the tail ends of a plurality of metal probes (1) penetrate into a fixing frame II (302), and the fixing frame II (302) penetrates into the other pipe orifice of the outer sleeve (4);
after the material for forming the sealing layer (2) is solidified, the sealing layer (2) filled in the outer sleeve (4) is formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011227023.8A CN112649039B (en) | 2020-11-06 | 2020-11-06 | Multi-probe conductance probe for high-temperature high-pressure two-phase flow detection and manufacturing method thereof |
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| CN202011227023.8A CN112649039B (en) | 2020-11-06 | 2020-11-06 | Multi-probe conductance probe for high-temperature high-pressure two-phase flow detection and manufacturing method thereof |
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