CN115435962A - Pressure sensing assembly of high-temperature lead bismuth alloy pressure sensor and sensor thereof - Google Patents
Pressure sensing assembly of high-temperature lead bismuth alloy pressure sensor and sensor thereof Download PDFInfo
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- CN115435962A CN115435962A CN202211134315.6A CN202211134315A CN115435962A CN 115435962 A CN115435962 A CN 115435962A CN 202211134315 A CN202211134315 A CN 202211134315A CN 115435962 A CN115435962 A CN 115435962A
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- corrugated pipe
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- 229910001152 Bi alloy Inorganic materials 0.000 title claims abstract description 38
- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920001971 elastomer Polymers 0.000 claims abstract description 18
- 239000000806 elastomer Substances 0.000 claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 11
- 230000001939 inductive effect Effects 0.000 claims description 29
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 28
- 229910052786 argon Inorganic materials 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 7
- 229910052797 bismuth Inorganic materials 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 14
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
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- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000909 Lead-bismuth eutectic Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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Images
Classifications
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- 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
-
- 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
-
- 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
- G01L19/0681—Protection against excessive heat
-
- 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
- G01L19/14—Housings
-
- 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
Abstract
The invention discloses a pressure sensing assembly of a high-temperature lead-bismuth alloy pressure sensor and the sensor thereof, belongs to the technical field of sensor detection, and aims to solve the problem that the existing pressure measuring device cannot detect the pressure of corrosive lead-bismuth liquid metal. It includes: the pressure guide cavity shell is sleeved on the outer side of the corrugated pipe, a cavity in the pressure guide cavity shell forms a pressure sensing cavity of the pressure sensing assembly, the front end of the pressure sensing assembly is provided with a pressure guide connection nozzle, the rear end of the connecting rod is provided with an iron core, the front end of the LVDT assembly is arranged between the connecting rod and the rectangular spring, the outer sides of the connecting rod, the rectangular spring and the LVDT assembly are sleeved with an elastomer support, the rear end of the elastomer support is provided with a rear end cover, and the front end of the elastomer support is connected with the pressure guide cavity shell; the displacement that pressure sensing subassembly connecting rod produced drives the iron core and produces the displacement, and then makes the LVDT subassembly produce output voltage, and the probe passes through the cable with voltage signal and carries to the changer in, changer output voltage signal. The invention discloses pressure detection of a high-temperature lead-bismuth alloy.
Description
Technical Field
The invention relates to a pressure sensing assembly of a sensor and the sensor thereof, belonging to the technical field of sensor detection.
Background
The lead bismuth alloy is also called low temperature alloy, low melting point alloy or fusible alloy, mainly consists of lead and bismuth with lower melting points, is added with other metals for adjusting the melting point of the alloy, and can be used as a coolant of a reactor. The lead bismuth eutectic alloy (LBE), although having a slightly higher melting point than sodium, is less chemically active, and both comprehensive performance evaluation and practical engineering applications (including use in mobile nuclear power plants) prove to be entirely feasible for use as a coolant in the next generation of new fast reactors.
At present, the advanced fast reactor technology of the lead bismuth alloy as the coolant is rapidly developed, and the lead bismuth alloy as the coolant mainly has the following advantages:
(1) The boiling point of the lead bismuth alloy is high and is about 3 times of the normal working temperature, and the boiling possibility is extremely low;
(2) The solidifying point of the lead-bismuth alloy is low, the phenomenon that the alloy is accidentally solidified to cause pipeline blockage and damage can not occur, and meanwhile, the lead-bismuth alloy has self-sealing capability at normal temperature, so that the phenomenon that a large amount of coolant loses accidents due to leakage of a main loop is prevented;
(3) The chemical activity of the lead-bismuth alloy is low, the lead-bismuth alloy is difficult to react with water and air, and fire or explosion can be avoided when a coolant is leaked to a reactor workshop or is broken due to a heat transfer pipe.
The heat generated by the reactor is taken out by the circulation of the coolant, and the working state of the coolant directly reflects the working state of the fast reactor. During normal operation, the coolant must maintain a certain working pressure, and the pressure of the coolant is regulated by a voltage stabilizer to ensure stable and safe operation of the reactor. When the main loop system (such as a main pump, a pressure container, a reactor internal component and the like) has abnormity or faults or the support of main loop system equipment is degraded, the fluctuation of the loop coolant pressure is caused, and the abnormal state of loop system equipment or the support degradation condition of the equipment is indirectly analyzed by analyzing the fluctuation of the coolant pressure, so that the abnormal state caused by the fixed state, the change of the sealing performance of the equipment (the leakage of the coolant) or the increase of the hydraulic dynamic load of the coolant can be found out as early as possible.
Because lead bismuth liquid metal is corrosive, traditional methods for measuring pressure, such as piezoresistive pressure sensors and strain pressure sensors, cannot be applied.
Disclosure of Invention
The invention provides a pressure sensing assembly of a high-temperature lead-bismuth alloy pressure sensor and the sensor thereof, aiming at solving the problem that the existing pressure measuring device cannot detect the pressure of corrosive lead-bismuth liquid metal.
The invention provides a pressure sensing assembly of a high-temperature lead bismuth alloy pressure sensor, which comprises a core bar, a corrugated pipe, a connecting rod and a rectangular spring, wherein the corrugated pipe is arranged on the core bar;
the corrugated pipe is wound on the outer side of the core rod and fixedly connected with the core rod, the rear end of the core rod is connected with a connecting rod, the rectangular spring is wound on the outer side of the connecting rod, and the rectangular spring is fixedly connected with the non-self free end of the connecting rod;
the outer side of the corrugated pipe is a pressure sensing cavity, a medium to be detected is filled in the pressure sensing cavity, the medium to be detected is lead-bismuth alloy liquid, the inner side of the corrugated pipe is communicated with the atmosphere, the pressure difference between the inner side and the outer side acts on the corrugated pipe, the pressure difference is converted into axial displacement by the corrugated pipe, and the displacement of the corrugated pipe sequentially drives the core rod, the connecting rod and the rectangular spring to form axial displacement.
Preferably, the displacement Δ L generated by the free end of the pressure sensing assembly is:
ΔL＝F/K；
wherein F represents the equivalent load borne by the pressure sensing assembly, and K represents the rigidity of the pressure sensing assembly;
F＝AP；
wherein, A represents the equivalent pressure area of the corrugated pipe, and P represents the pressure of the medium to be measured borne by the corrugated pipe;
K＝K b +K t ；
wherein, K b Representing the stiffness of the bellows, K t Representing the stiffness of a rectangular spring.
Preferably, the corrugated pipe and the core rod are welded through argon arc, and the rectangular spring and the connecting rod are welded through argon arc.
Preferably, the core rod is connected with the connecting rod through threads.
The invention provides a high-temperature lead bismuth alloy pressure sensor, which comprises a probe and a transmitter;
the probe comprises a pressure sensing assembly, a pressure guiding joint nozzle, a pressure guiding cavity shell, an elastomer bracket, a rear end cover, an LVDT assembly and an iron core;
the pressure-inducing cavity shell is sleeved on the outer side of the corrugated pipe of the pressure-sensing assembly, a cavity inside the pressure-inducing cavity shell forms a pressure-inducing cavity of the pressure-sensing assembly, a pressure-inducing connecting nozzle is arranged at the front end of the pressure-sensing assembly, an iron core is arranged at the rear end of a connecting rod of the pressure-sensing assembly, the front end of the LVDT assembly is arranged between the connecting rod of the pressure-sensing assembly and a rectangular spring, an elastomer support is sleeved on the outer sides of the connecting rod, the rectangular spring and the LVDT assembly, a rear end cover is arranged at the rear end of the elastomer support, and the front end of the elastomer support is connected with the pressure-inducing cavity shell;
the displacement that pressure sensing subassembly connecting rod produced drives the iron core and produces the displacement, and then makes the LVDT subassembly produce output voltage, and the probe passes through the cable with the voltage signal who obtains and carries to the changer in, changer output voltage signal.
Preferably, the LVDT assembly comprises a framework, a coil, a shell and a high-temperature tube seat;
the inner cavity of the shell is a vacuum cavity, the high-temperature tube seat is hermetically arranged at the rear end part of the shell, the framework and the coil are arranged in the inner cavity of the shell, and the coil is wound on the outer side of the framework;
the rear end of the high-temperature tube seat is connected with the rear end cover through threads.
Preferably, the framework and the shell are welded with the high-temperature tube seat through vacuum electron beams.
Preferably, the pressure guiding connection nozzle and the pressure guiding cavity shell are welded by argon arc welding.
Preferably, the connecting rod and the iron core of the pressure sensing assembly are connected through threads.
Preferably, the elastomer support and the pressure-inducing cavity shell are welded by argon arc welding.
The pressure sensing assembly of the high-temperature lead bismuth alloy pressure sensor can isolate and seal a measured medium and a reference cavity (communicated with the atmosphere), can resist the high temperature and high pressure of the measured medium, has certain rigidity, and can generate displacement which is easy to measure.
The high-temperature lead bismuth alloy pressure sensor provided by the invention can be used for monitoring liquid metal pressure signals of a fast neutron reactor or other metal cooling nuclear reactors or measuring the pressure of other measuring media with severe corrosivity. The sensor has the characteristics of high temperature resistance (the working temperature of liquid metal can reach more than 500 ℃, the sensor can completely cover the working temperature), simple structure, safety, reliability, high accuracy, continuous measurement, wide application occasions and the like.
Drawings
FIG. 1 is a schematic structural diagram of a pressure sensing assembly of a high-temperature lead-bismuth alloy pressure sensor according to the present invention;
FIG. 2 is a schematic structural diagram of a high-temperature lead-bismuth alloy pressure sensor according to the present invention;
FIG. 3 is a schematic diagram of the LVDT assembly of the present invention;
fig. 4 is a schematic diagram of the high-temperature lead bismuth alloy pressure sensor of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1:
the present embodiment is described below with reference to fig. 1, and the pressure sensing assembly of the high-temperature lead-bismuth alloy pressure sensor in the present embodiment includes a core rod 1, a bellows 2, a connecting rod 3, and a rectangular spring 4;
the corrugated pipe 2 is wound on the outer side of the core rod 1, the corrugated pipe 2 is fixedly connected with the core rod 1, the rear end of the core rod 1 is connected with the connecting rod 3, the rectangular spring 4 is wound on the outer side of the connecting rod 3, and the rectangular spring 4 is fixedly connected with the non-self free end of the connecting rod 3;
the outer side of the corrugated pipe 2 is a pressure sensing cavity, a medium to be detected is filled in the pressure sensing cavity, the medium to be detected is lead-bismuth alloy liquid, the inner side of the corrugated pipe is communicated with the atmosphere, the pressure difference between the inner side and the outer side acts on the corrugated pipe 2, the corrugated pipe 2 converts the pressure difference into axial displacement, and the displacement of the corrugated pipe 2 sequentially drives the core rod 1, the connecting rod 3 and the rectangular spring 4 to form axial displacement.
Further, the displacement Δ L generated by the free end of the pressure sensing assembly is:
ΔL＝F/K；
wherein F represents the equivalent load borne by the pressure sensing assembly, and K represents the rigidity of the pressure sensing assembly;
F＝AP；
wherein, A represents the equivalent pressure area of the corrugated pipe 2, and P represents the pressure of the medium to be measured borne by the corrugated pipe 2;
K＝K b +K t ；
wherein, K b Representing the stiffness, K, of the bellows 2 t The stiffness of the rectangular spring 4 is shown.
In the embodiment, the pressure sensing function is realized by combining the corrugated pipe and the spring, the corrugated pipe mainly plays a role in sealing, and the spring mainly plays a role in increasing the rigidity of the pressure sensing assembly. The pressure sensing assembly is a corrugated pipe and a spring which are in parallel connection elastic structure. The measured medium and the reference cavity are isolated and sealed, and the high temperature and the high pressure of the medium can be resisted.
Furthermore, the corrugated pipe 2 and the core bar 1 are welded by argon arc, and the rectangular spring 4 and the connecting rod 3 are welded by argon arc.
Still further, the core bar 1 and the connecting rod 3 are connected through threads.
Example 2:
the following describes the present embodiment with reference to fig. 2 and fig. 3, and the high temperature lead bismuth alloy pressure sensor of the present embodiment includes a probe and a transducer;
the probe comprises a pressure sensing assembly, a pressure guiding joint nozzle 5, a pressure guiding cavity shell 6, an elastomer bracket 7, a rear end cover 9, an LVDT assembly 8 and an iron core 10;
the pressure-inducing cavity shell 6 is sleeved outside the corrugated pipe 2 of the pressure-inducing component, a cavity inside the pressure-inducing cavity shell 6 forms a pressure-inducing cavity of the pressure-inducing component, a pressure-inducing joint nozzle 5 is arranged at the front end of the pressure-inducing component, an iron core 10 is installed at the rear end of a connecting rod 3 of the pressure-inducing component, the front end of an LVDT component 8 is installed between the connecting rod 3 and a rectangular spring 4 of the pressure-inducing component, an elastomer support 7 is sleeved outside the connecting rod 3, the rectangular spring 4 and the LVDT component 8, a rear end cover 9 is installed at the rear end of the elastomer support 7, and the front end of the elastomer support 7 is connected with the pressure-inducing cavity shell 6;
the displacement that pressure sensing subassembly connecting rod 3 produced drives iron core 10 and produces the displacement, and then makes LVDT subassembly 8 produce output voltage, and the probe is carried the voltage signal who obtains to the changer through the cable in, changer output voltage signal.
In the embodiment, the cable adopts a high-temperature shielding cable, and the pressing and wire throwing mode is adopted to lead out the output signal of the sensor probe.
In the embodiment, the voltage signal is subjected to AD conversion by the transmitter, then digital compensation is carried out on the converted voltage value through the singlechip, and the voltage signal is output through DA conversion.
Further, the LVDT component 8 comprises a framework 8-1, a coil 8-2, a shell 8-3 and a high-temperature pipe seat 8-4;
the inner cavity of the shell 8-3 is a vacuum cavity, the high-temperature tube seat 8-4 is hermetically arranged at the rear end part of the shell 8-3, the framework 8-1 and the coil 8-2 are arranged in the inner cavity of the shell 8-3, and the coil 8-2 is wrapped on the outer side of the framework 8-1;
the rear end of the high-temperature pipe seat 8-4 is connected with the rear end cover 9 through threads.
In the embodiment, the coil 8-2 is arranged in a sealed vacuum cavity formed by the shell 8-3 and the high-temperature tube seat 8-4, and the vacuum cavity can protect the coil 8-2 inside and prevent the outside air from corroding insulating materials in a high-temperature environment.
Furthermore, the framework 8-1 and the shell 8-3 are welded with the high-temperature tube seat 8-4 through vacuum electron beams.
Furthermore, argon arc welding is adopted between the pressure guiding connection nozzle 5 and the pressure guiding cavity shell 6.
Further, the connecting rod 3 and the iron core 10 of the pressure sensing assembly are connected by screw threads.
Furthermore, the elastomer bracket 7 and the pressure-leading cavity shell 6 are welded by argon arc.
In the present embodiment, the pressure-sensitive components mainly function as: the measured medium and the reference cavity are sealed in an isolation way, so that the high temperature and high pressure of the medium can be resisted; has a certain rigidity, and produces displacement which is easy to measure.
In the invention, the structure of the differential transformer type displacement sensor (LVDT component 8) is a solenoid type, and the solenoid type differential transformer type displacement sensor can be divided into different structural forms according to different winding displacement modes of coils. There are two-stage, three-stage, four-stage, and five-stage, etc. Compared with a two-stage LVDT, the three-stage LVDT has the advantages that as differential output is used in the three-stage LVDT, a part of higher harmonic components can be eliminated, so that zero residual voltage is reduced, and linearity is improved; the presence of four-and five-segment LVDTs, while improving linearity and sensitivity to some extent, has led to rapid volume increases and more complex structures and winding processes, which are detrimental to the development of these types of LVDTs.
The working principle of the present invention is described with reference to fig. 4, and the high temperature lead bismuth alloy pressure sensor provided by the present invention utilizes the pressure difference between the lead bismuth alloy liquid in the pressure sensing cavity and the external atmosphere to make the free end of the composite pressure sensing element of the corrugated tube and the rectangular spring generate corresponding displacement, and drives the iron core in the differential transformer to deviate from the central point by means of the iron core connecting rod structure, the deviation of the iron core from the central point causes the induced electromotive forces in the 2 secondary coils in the differential transformer to be unequal, so as to generate output voltage, and the output voltage and the displacement of the iron core are in a linear corresponding relationship, thereby realizing the measurement of the liquid lead bismuth alloy pressure in the high temperature environment.
In the invention, the corrugated pipe 2 and the pressure leading cavity shell 6 are welded by argon arc. The rectangular spring 4 and the elastic body support 7 are welded by argon arc welding. The LVDT assembly 8 and the high temperature tube seat 8-4 are welded by vacuum electron beams. The LVDT assembly 8 and the rear end cap 9 are connected by threads.
In the invention, the corrosion of liquid metal lead and lead-bismuth alloy to structural materials shows that the liquid lead has the dissolubility and corrosion capability to certain elements (such as Ni and Cr) in metal steel, and aiming at the corrosion problem, two main processes are adopted for mainly solving the corrosion problem at present: firstly, the surface is oxidized, and secondly, the surface is coated with a protective coating. Because the metal liquid pipeline is complex and the coating quality is difficult to ensure in the processing and installation processes, the surface oxidation is the mature technology at present. The reactor vessel adopts 316L of main structural materials, and proper oxygen control can ensure the self-passivation protection of the materials in the environment of 500 ℃. All parts of the item including the pressure sensing assembly, which are in contact with the liquid metal, are made of 316L.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. The pressure sensing assembly of the high-temperature lead-bismuth alloy pressure sensor is characterized by comprising a core rod (1), a corrugated pipe (2), a connecting rod (3) and a rectangular spring (4);
the corrugated pipe (2) wraps the outer side of the core rod (1), the corrugated pipe (2) is fixedly connected with the core rod (1), the rear end of the core rod (1) is connected with a connecting rod (3), the rectangular spring (4) wraps the outer side of the connecting rod (3), and the rectangular spring (4) is fixedly connected with the non-self-free end of the connecting rod (3);
the outer side of the corrugated pipe (2) is a pressure sensing cavity, a medium to be tested is filled in the pressure sensing cavity, the medium to be tested is lead-bismuth alloy liquid, the inner side of the corrugated pipe is communicated with the atmosphere, the pressure difference between the inner side and the outer side acts on the corrugated pipe (2), the corrugated pipe (2) converts the pressure difference into axial displacement, and the displacement of the corrugated pipe (2) sequentially drives the core rod (1), the connecting rod (3) and the rectangular spring (4) to form the axial displacement.
2. The pressure sensing assembly of the high-temperature lead-bismuth alloy pressure sensor as claimed in claim 1, wherein the displacement Δ L generated by the free end of the pressure sensing assembly is:
ΔL＝F/K；
wherein F represents the equivalent load borne by the pressure sensing assembly, and K represents the rigidity of the pressure sensing assembly;
F＝AP；
wherein A represents the equivalent pressure area of the corrugated pipe (2), and P represents the pressure of the medium to be measured borne by the corrugated pipe (2);
K＝K b +K t ；
wherein, K b Denotes the stiffness, K, of the bellows (2) t Showing rectangle spring (4)Of the rigid member.
3. The pressure sensing assembly of the high-temperature lead-bismuth alloy pressure sensor as claimed in claim 1, wherein the corrugated pipe (2) and the core rod (1) are welded by argon arc welding, and the rectangular spring (4) and the connecting rod (3) are welded by argon arc welding.
4. The pressure sensing assembly of the high-temperature lead-bismuth alloy pressure sensor according to claim 3, wherein the core rod (1) is connected with the connecting rod (3) through threads.
5. A high-temperature lead-bismuth alloy pressure sensor, which is realized on the basis of the pressure sensing assembly of claim 4, and is characterized by comprising a probe and a transmitter;
the probe comprises a pressure sensing assembly, a pressure guiding joint nozzle (5), a pressure guiding cavity shell (6), an elastomer bracket (7), a rear end cover (9), an LVDT assembly (8) and an iron core (10);
the pressure-inducing cavity comprises a pressure-inducing cavity shell (6), a pressure-inducing nozzle (5) and an iron core (10), wherein the pressure-inducing cavity shell (6) is sleeved on the outer side of a corrugated pipe (2) of the pressure-inducing component, a cavity inside the pressure-inducing cavity shell (6) forms a pressure-inducing cavity of the pressure-inducing component, the front end of the pressure-inducing component is provided with the pressure-inducing nozzle (5), the rear end of a connecting rod (3) of the pressure-inducing component is provided with the iron core (10), the front end of an LVDT component (8) is installed between the connecting rod (3) of the pressure-inducing component and a rectangular spring (4), the outer sides of the connecting rod (3), the rectangular spring (4) and the LVDT component (8) are sleeved with an elastomer support (7), the rear end cover (9) is installed at the rear end of the elastomer support (7), and the front end of the elastomer support (7) is connected with the pressure-inducing cavity shell (6);
the displacement generated by the pressure sensing component connecting rod (3) drives the iron core (10) to generate displacement, so that the LVDT component (8) generates output voltage, the probe transmits the obtained voltage signal to the transmitter through a cable, and the transmitter outputs the voltage signal.
6. A high temperature lead bismuth alloy pressure sensor according to claim 5, characterized in that the LVDT assembly (8) comprises a bobbin (8-1), a coil (8-2), a housing (8-3) and a high temperature tube seat (8-4);
the inner cavity of the shell (8-3) is a vacuum cavity, the high-temperature tube seat (8-4) is hermetically arranged at the rear end part of the shell (8-3), the framework (8-1) and the coil (8-2) are arranged in the inner cavity of the shell (8-3), and the coil (8-2) is wrapped on the outer side of the framework (8-1);
the rear end of the high-temperature pipe seat (8-4) is connected with the rear end cover (9) through threads.
7. The high-temperature lead-bismuth alloy pressure sensor according to claim 6, wherein the skeleton (8-1) and the shell (8-3) are welded with the high-temperature tube seat (8-4) through vacuum electron beams.
8. The high-temperature lead-bismuth alloy pressure sensor according to claim 5, characterized in that argon arc welding is adopted between the pressure-leading connecting nozzle (5) and the pressure-leading cavity shell (6).
9. The high-temperature lead-bismuth alloy pressure sensor according to claim 5, wherein the connecting rod (3) and the iron core (10) of the pressure sensing assembly are connected through threads.
10. The pressure sensor of claim 5, wherein the elastomer support (7) and the pressure chamber housing (6) are welded by argon arc welding.
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Citations (6)
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|---|---|---|---|---|
| GB2086587A (en) * | 1980-11-03 | 1982-05-12 | Teltov Geraete Regler | Electrical fluid pressure transducers |
| JP2000292286A (en) * | 1999-04-02 | 2000-10-20 | Yazaki Corp | Pressure sensor |
| JP2000292284A (en) * | 1999-04-02 | 2000-10-20 | Yazaki Corp | Pressure sensor |
| CN108072482A (en) * | 2016-11-10 | 2018-05-25 | 浙江三花制冷集团有限公司 | Pressure controller and its pressure sensor, the production method of pressure sensor |
| CN110017938A (en) * | 2019-03-20 | 2019-07-16 | 常州天利智能控制股份有限公司 | A kind of bellows type pressure sensor and the automatic controller with it |
| CN212391161U (en) * | 2020-05-26 | 2021-01-22 | 南京普亿康智能科技有限公司 | Metal corrugated pipe for pressure sensing element |
-
2022
- 2022-09-16 CN CN202211134315.6A patent/CN115435962B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2086587A (en) * | 1980-11-03 | 1982-05-12 | Teltov Geraete Regler | Electrical fluid pressure transducers |
| JP2000292286A (en) * | 1999-04-02 | 2000-10-20 | Yazaki Corp | Pressure sensor |
| JP2000292284A (en) * | 1999-04-02 | 2000-10-20 | Yazaki Corp | Pressure sensor |
| CN108072482A (en) * | 2016-11-10 | 2018-05-25 | 浙江三花制冷集团有限公司 | Pressure controller and its pressure sensor, the production method of pressure sensor |
| CN110017938A (en) * | 2019-03-20 | 2019-07-16 | 常州天利智能控制股份有限公司 | A kind of bellows type pressure sensor and the automatic controller with it |
| CN212391161U (en) * | 2020-05-26 | 2021-01-22 | 南京普亿康智能科技有限公司 | Metal corrugated pipe for pressure sensing element |
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| CN115435962B (en) | 2024-02-27 |
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