CN112649039B - Multi-probe conductance probe for high-temperature high-pressure two-phase flow detection and manufacturing method thereof - Google Patents
Multi-probe conductance probe for high-temperature high-pressure two-phase flow detection and manufacturing method thereof Download PDFInfo
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- CN112649039B CN112649039B CN202011227023.8A CN202011227023A CN112649039B CN 112649039 B CN112649039 B CN 112649039B CN 202011227023 A CN202011227023 A CN 202011227023A CN 112649039 B CN112649039 B CN 112649039B
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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 high-pressure two-phase flow detection and a manufacturing method thereof. Each conductance 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 cavitation share, interface speed, interface area concentration and the like in a rectangular channel, a circular tube channel, a bar bundle channel and various special-shaped channels under high-temperature and high-pressure conditions.
Description
Technical Field
The invention belongs to the technical field of multiphase flow detection.
Background
The conductance probe is based on the principle that the resistances between the needle and the outer sleeve are different according to different substances in the needle area in the multiphase flow, so that the needle can detect various parameters of the multiphase flow. In practical measurement, the probe needs to be penetrated into multiphase fluid, the outer metal sleeve is connected to the ground level, and four needles are connected to the signal acquisition card. If the needle head area is a substance with smaller resistance, the signal measured on the needle is low level, and if the needle head area is a substance with larger resistance, the signal measured on the needle is high level, and parameters such as cavitation share, interface speed, interface area concentration and the like of the multiphase flow can be measured according to the change condition of the measured signal.
However, because of the small size of the conductance probe, its processing method directly determines the useful life of the probe tip, the signal quality, and the sealing structure of the multiphase flow conduit. In particular, in a high-temperature and high-pressure environment, the common manufacturing method cannot meet the requirements for enabling the conductive probe to resist high temperature and high pressure. Therefore, the invention realizes the design method and the micro-size processing method of the high-temperature and high-pressure structure such as the bracket, the high-temperature glue sealing method and the like by using the integrally formed stainless steel outer sleeve, the metal needle Tu Gaowen high-pressure insulating coating and the ceramic sleeve, and realizes the conductance probe which can be used in the high-temperature and high-pressure environment.
Disclosure of Invention
The invention aims to provide a multi-probe conductivity probe for high-temperature 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 tip of the metal probe is a detection end, and the tail of the metal probe is a wiring end. The probe and terminal are located outside the outer sleeve.
The fixing frames I and 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 space in the outer sleeve is filled with a sealing layer.
Further, the metal probe has an insulating coating resistant to high temperatures. 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 has a longer length than the other metal probes.
Further, the metal probe is integrally formed.
Further, the outer sleeve is an integrally formed steel pipe.
Furthermore, the fixing frames I and II are ceramic bars.
Further, both the metal probe and the outer sleeve are bent at 90 °.
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:
penetrating a plurality of metal probes into the outer sleeve.
And 2, injecting materials for forming sealing layers into the inner cavity of the outer sleeve and through holes of the fixing frames I and II.
The needle tips of the metal probes penetrate into the fixing frame I, and the fixing frame I penetrates into one pipe orifice of the outer sleeve.
And (4) penetrating the tail ends of the metal probes into a fixing frame II, and penetrating the fixing frame II into the other pipe orifice of the outer sleeve.
And 5, after the material for forming the sealing layer is solidified, forming the sealing layer filled in the outer sleeve.
The invention has the technical effects that:
1) By the method of integrally and directly connecting the metal needles with the diameter of 0.2mm, the welding head for extending and connecting the probes is avoided, and the four metal probes can be arranged in the metal sleeve with the inner diameter of less than 2.4mm.
2) The high-temperature coating is coated on the surface of the metal needle, so that the insulation between the metal needle and the outer stainless steel sleeve in the installation and use processes is ensured.
3) The method of heating and bending by using the grinding tool is used for manufacturing the integrated outer stainless steel sleeve, so that the defect brought by welding of the outer sleeve is avoided, and the high pressure resistance of 4MPa is realized.
4) By using the method of firstly injecting glue and then installing the metal needle and the ceramic sleeve, the problem of incomplete sealing caused by firstly installing and then injecting glue 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 L portion;
FIG. 3 is a schematic diagram of the probe of example 3;
FIG. 4 is a schematic view of the structure of the outer sleeve;
FIG. 5 is a schematic diagram of the structure of the fixing frame I;
fig. 6 is a schematic structural diagram of the fixing frame II.
In the figure: 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 described below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples. Various substitutions and alterations are made according to the ordinary skill and familiar means of the art without departing from the technical spirit of the invention, and all such substitutions and alterations are intended to be included in the scope of the invention.
Example 1:
referring to fig. 1, a four-probe conductance probe for high-temperature 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 cavitation share, interface speed, interface area concentration and the like in a rectangular channel, a circular tube channel, a bar bundle channel and various special-shaped channels under high-temperature and high-pressure conditions.
Both the metal probe 1 and the outer sleeve 4 are bent at 90 deg.. The metal probe 1 penetrates into the outer sleeve 4. The tip of the metal probe 1 is a detection end, and the tail of the metal probe is a wiring end. The probe and terminal ends are located outside the outer sleeve 4. The metal probe 1 has an insulating coating (double-layer polytetrafluoroethylene coating, extreme high temperature resistance 300 degrees) resistant to high temperatures. 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 insulation by using an insulating high temperature coating method.
The fixing frames I301 and II302 are provided with the metal probes 1 which pass through and are equal to the metal probes 1 in number
Is formed in the substrate. The fixing frames I301 and II302 are ceramic bars.
The fixing frames I301 and II302 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 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 material of the sealing layer 2 is high-temperature-resistant sealant (JL-528 high-temperature-resistant strong AB glue, and the limit high temperature resistance is 300 ℃).
The four metal needles of the embodiment are connected with the rear-end signal acquisition system by adopting a method of directly penetrating through the 90-degree bent pipe without welding, so that the difficulty of installing the multiple-point welding in a tiny external stainless steel sleeve can be avoided, and the high-temperature resistant insulating coating on the outer surface of the integrated metal needle also ensures the insulation between a plurality of needles and the diameters of the needles and the outer sleeve; in the process of processing the inner sealing layer, high-temperature glue is injected into the ceramic sleeve, then the inner supporting frame and the four metal needles are fixed, and gaps between the metal needles and the ceramic support and gaps between the outer sleeve and the ceramic support are filled with the sealant through extrusion, so that the whole probe is guaranteed to be sealed completely.
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 from the outer sleeve 4 to form a ball head, and the four-metal probe 1 is located on the ball head and is respectively marked as: metal probe I101, metal probe II102, metal probe III103, metal needle IV104.
The metal probes I101, II102, III103 and IV104 are arranged in a cross-like manner as seen from the end face (perpendicular to the orifice of the outer sleeve 4). The length of the metal probe III103 is longer than that of the other metal probes 1, namely, the tips of the metal probes I101, II102 and IV104 are on the same plane A, and the tip of the metal probe III103 is below the plane A (the side far 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 2.4mm.
The metal probe 1 is an integrally formed non-welded metal needle with the diameter of 0.2mm.
The probe of the embodiment can be used for multiphase flow detection under the environment of high temperature 250 ℃ and high pressure 4 MPa.
Example 3:
this embodiment discloses a method for manufacturing the four-probe conductance probe according to embodiment 1 or 2, comprising the steps of:
four metal probes 1 are inserted into an outer sleeve 4. The dimensions of the metal probe 1 and the outer sleeve 4 are determined according to actual needs. The stainless steel outer sleeve 4 is bent by heating by using a grinding tool, so that 90-degree bending is realized, an integrated outer sleeve is realized, and possible flaws in the welding process of the outer sleeve are avoided, so that the high-pressure sealing environment is damaged. The metal probe 1 is manufactured by coating a 250 ℃ high temperature resistant coating on the surface of a stainless steel needle with the diameter of 0.2mm.
The 90-degree bent metal probe 1 has a 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 is elastically deformed, so that the other pipe orifice of the outer sleeve 4 is formed.
The inner cavity of the outer sleeve 4 and the through holes of the fixing frames I301 and II302 are injected with materials for forming the sealing layer 2. The high-temperature glue is injected into the ceramic sleeve, then the inner support frame and the four metal needles are fixed, and the gaps between the metal needles and the ceramic support and between the outer sleeve and the ceramic support are filled with the sealing glue through extrusion, so that the sealing in the sleeve can be ensured to the maximum degree, and the condition of incomplete sealing caused by the prior installation and then glue injection is avoided.
The needle tips of the metal probes 1 penetrate into the fixing frame I301, and the fixing frame I301 penetrates into one pipe orifice of the outer sleeve 4.
The tail ends of the 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 sleeve 4 is formed.
The high-pressure resistant structure formed by the method ensures the high-pressure resistant strength of the shell; the inner fixing frame is sleeved on the four metal needles by using a ceramic sleeve, so that the strength of the inner structure and the insulation between the metal needles are ensured; the inner sealing layer is sealed by high-temperature glue, and gaps between the ceramic tube and the outer sleeve and gaps between the ceramic tube and the four metal needles are filled.
Claims (4)
1. The utility model provides a many probe heads electric conductance probe that is used for high temperature high pressure two-phase flow to survey which characterized in that: comprises a plurality of elastic 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 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; wherein the length of one metal probe (1) is longer than that of the other metal probes (1); the detection end and the wiring end are positioned outside the outer sleeve (4);
the fixing frames I (301) and 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; the fixing frame I (301) protrudes out of the outer sleeve (4) to form a ball head, and each metal probe (1) is positioned on the ball head; the metal probe (1) is provided with a high-temperature resistant insulating coating; the metal probe (1) is integrally formed; the outer sleeve (4) is an integrally formed steel pipe; the fixing frames I (301) and II (302) are ceramic rods;
the method of manufacturing the multi-probe conductance probe comprises the steps of:
penetrating a plurality of metal probes (1) into an outer sleeve (4);
injecting a material for forming the sealing layer (2) into the inner cavity of the outer sleeve (4) and through holes of the fixing frame I (301) and the fixing frame II (302);
the needle tips 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; the sealing layer (2) is made of high-temperature-resistant sealant.
2. A multi-probe conductance probe for high temperature, high pressure, two-phase flow detection as defined in claim 1, wherein: 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, high pressure, two-phase flow detection as defined in claim 2, wherein: the metal probe (1) has four.
4. A multi-probe conductance probe for high temperature, high pressure, two-phase flow detection as defined in claim 1, wherein: the metal probe (1) and the outer sleeve (4) are bent to 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN112649039A CN112649039A (en) | 2021-04-13 |
| CN112649039B true CN112649039B (en) | 2023-06-27 |
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