CN114916101A - Heating rod and heating rod bundle device - Google Patents
Heating rod and heating rod bundle device Download PDFInfo
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- CN114916101A CN114916101A CN202210519763.1A CN202210519763A CN114916101A CN 114916101 A CN114916101 A CN 114916101A CN 202210519763 A CN202210519763 A CN 202210519763A CN 114916101 A CN114916101 A CN 114916101A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 119
- 239000000919 ceramic Substances 0.000 claims description 26
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 5
- 238000005219 brazing Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 7
- 238000011160 research Methods 0.000 description 7
- 239000003758 nuclear fuel Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229910001119 inconels 625 Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Resistance Heating (AREA)
Abstract
The invention relates to a heating rod and a heating rod bundle device, which solve the technical problem that the critical heat flux density of a fluid in a rod bundle channel under the working condition of low pressure and low flow cannot be researched in the prior art. The invention discloses a heating rod, which comprises a heating pipe, an upper conductive electrode and a lower conductive electrode; the heating pipe includes the heating pipe casing and sets up the fixed pipe of hollow pottery in the heating pipe casing along the axial, and the fixed outside of managing of pottery is provided with a plurality of temperature rings along the axial interval, and every temperature ring inside is equipped with a plurality of recesses, has all put the thermocouple in every recess, and the connecting wire of every thermocouple assembles along the fixed outer wall of pipe of pottery in the heating pipe, stretches out along the axial in the follow-up conductive electrode is inside. The invention also discloses a heating rod bundle device, which comprises a heating rod bundle consisting of a plurality of heating rods, a positive electrode assembly, a negative electrode assembly, a current divider, a positive electrode conductive connecting device, a direct current power supply and a negative electrode conductive connecting device.
Description
Technical Field
The invention belongs to the field of reactor thermal hydraulic experiment research, and particularly relates to a heating rod and a heating rod bundle device.
Background
The critical heat flow density is a critical factor for limiting heat exchange and is crucial to the safety of the reactor, when the heat flow density on the surface of the fuel element exceeds a certain limit value, the temperature on the surface of the fuel element is caused to rise sharply, and in severe cases, the fuel element is likely to be damaged, and radioactive substances leak, so that the prediction of the magnitude of the critical heat flow density is crucial to the safety of the reactor.
In the reactor thermal safety research, it is common to use an experimental mode to perform critical heat flux density research. Because nuclear fuel in the nuclear fuel rod has radioactivity, so that the nuclear fuel elements cannot be directly adopted to carry out thermal hydraulic experimental study in an actual experiment, an electric heating rod is adopted to replace the nuclear fuel elements to carry out the experiment, and the heat generation of the nuclear fuel elements is simulated through the heat generation of the electric heating rod so as to carry out corresponding experimental study.
The fuel elements of different reactors are arranged in different ways, and the gaps among the fuel rods are different. The pulse reactor belongs to a research reactor of low-pressure natural circulation heat exchange, and the arrangement mode of fuel elements is different from that of a conventional pressurized water reactor. At present, many documents are used for more critical heat flux density experimental researches under high-pressure working conditions of circular tubes and ring-shaped structures, less critical heat flux density researches of rod bundle channels are needed, and the experimental data are directly applied to have a large error in the prediction of the critical heat flux density under the low-pressure working conditions, so that the critical heat flux density in the low-pressure rod bundle channels needs to be correspondingly experimentally researched.
Disclosure of Invention
In order to solve the technical problem that the critical heat flux density of a fluid in a rod bundle channel under a low-pressure low-flow working condition cannot be researched in the prior art, the invention provides a heating rod and a heating rod bundle device, and the specific technical scheme is as follows:
a heating rod, characterized in that it comprises: the heating tube, set up in the upper conductive electrode and lower conductive electrode of the axial both ends of the heating tube separately; the heating pipe comprises a heating pipe shell and a hollow ceramic fixing pipe arranged in the heating pipe shell along the axial direction, wherein a plurality of temperature measuring rings are arranged on the outer side of the ceramic fixing pipe at intervals along the axial direction, a plurality of grooves are formed in each temperature measuring ring, a thermocouple is arranged in each groove, and a connecting lead of each thermocouple is converged along the outer wall of the ceramic fixing pipe in the heating pipe and axially extends out of the inner part of the upper conductive electrode; the lower end of the ceramic fixing tube is connected with the lower conductive electrode.
Furthermore, the temperature measuring ring is of a C-shaped structure, so that multipoint temperature measurement at different positions is realized; the probe of the thermocouple is connected with the temperature measuring ring through silver brazing, so that the temperature measuring precision of the device is improved.
Furthermore, an insulating heat-conducting sleeve is arranged between each temperature measuring ring and the heating pipe shell, the insulating heat-conducting sleeve is made of boron nitride, the insulating heat-conducting sleeve is good in heat-conducting property and insulating, and the temperature measuring probe can be prevented from conducting electricity, so that the normal work of the thermocouple is influenced.
Furthermore, a hollow ceramic tube is arranged inside the upper conductive electrode, the upper end of the ceramic tube is connected with the upper end of the upper conductive electrode through an insulating lock nut, and a gap exists between the lower end of the ceramic tube and the ceramic fixing tube.
Furthermore, the length of the heating pipe and the thickness of the heating pipe shell can be adjusted, so that different heating powers can be realized according to practical application scenes.
Furthermore, the upper conductive electrode, the heating pipe and the lower conductive electrode are all connected by silver brazing, so that the processing precision of the device is improved.
The invention also provides a heating rod bundle device, which comprises a heating rod bundle consisting of a plurality of heating rods, a positive electrode assembly and a negative electrode assembly which are respectively sleeved at two ends of the heating rod bundle, and a current shunt, a positive electrode conductive connecting device, a direct current power supply and a negative electrode conductive connecting device which are sequentially arranged along the circuit backflow direction; and a voltage transmitter disposed between the positive and negative electrode assemblies.
Furthermore, the positive electrode assembly and the negative electrode assembly are respectively composed of a plurality of electrode clamps, the plurality of electrode clamps are composed of a plurality of middle electrode clamps and two end electrode clamps, a power supply interface is arranged on the radial outer side of each end electrode clamp, and a plurality of first grooves with the same size are axially arranged on the inner side of each end electrode clamp; a plurality of second grooves with the same size are respectively arranged on two radial sides of the middle electrode clamp along the axial direction, and the first grooves and the second grooves are also the same in size; the positions of the first grooves and the positions of the second grooves adjacent to the first grooves and the positions of the second grooves on the adjacent sides of the adjacent middle electrodes are respectively corresponding to each other and respectively enclose a plurality of first through holes, the plurality of first through holes correspond to the arrangement mode of the heating rods, and the inner diameters of the first through holes are the same as the outer diameters of the heating rods; and the heating rods are clamped and fixed in the corresponding first through holes through bolts between the electrode clamps.
Further, an insulating sheath can be added in the first through hole to realize the independent heating function of the heating rod, so that the applicability of the device is improved.
Further, DC power supply adopts the power supply mode of low-voltage high current, and maximum voltage is 25V, and maximum current is 20000A, compares the test that is more applicable under the low-voltage operating mode with prior art, and more accords with the requirement of power consumption safety.
The invention has the beneficial effects that:
1. the heating rod comprises a heating pipe, an upper conductive electrode and a lower conductive electrode, wherein a plurality of temperature measuring rings are arranged in the heating pipe, a plurality of thermocouples are arranged on the temperature measuring rings to realize multipoint temperature measurement, and the temperature of fluid can be accurately obtained through real-time temperature measurement.
2. According to the invention, the thickness of the heating pipe is reasonably designed, the power input is realized by adopting corresponding voltage and current, and the output power of the heating rod is adjustable, so that the applicability of the heating rod is improved.
3. The invention adopts the structural design that the silver brazing filler metal of the thermocouple is welded in the temperature measuring ring, can flexibly arrange a plurality of temperature measuring points according to requirements, and can obtain accurate measuring results.
4. The arrangement mode of the heating rod bundle structure is the same as that of the pulse stack fuel elements, and the critical heat flux density experimental study under the low-pressure working condition of the pulse stack can be met.
5. According to the heating rod bundle device, the insulating sleeve is additionally arranged between the heating rod and the electrode assembly, so that the heating rods can be independently controlled, and the heating rod bundle device is particularly used for experimental research under the operating conditions that the temperature of a middle channel is high and the temperature of a peripheral channel is low.
6. The anode assembly, the cathode assembly, the temperature measuring ring, the upper conductive electrode and the lower conductive electrode are all made of T2 oxygen-free red copper, and the materials are good in conductivity and low in cost.
7. The heating pipe is made of Inconel 625, has good oxidation resistance and strong acid-base corrosion resistance, can provide accurate data support for a test result, and can prolong the service life of the whole device.
Drawings
Fig. 1 is an axial sectional view of a heating rod structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a temperature ring structure of a heater bar structure according to an embodiment of the present invention.
FIG. 3 is a top view of a temperature ring in a heater bar structure according to an embodiment of the present invention.
FIG. 4 is a reference diagram of a plurality of temperature measuring rings in a heating rod structure according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a heating rod cluster device according to an embodiment of the invention.
Fig. 6 is a radial cross-sectional view of the positive electrode assembly or the negative electrode assembly in a heating rod cluster apparatus structure according to an embodiment of the present invention.
The reference numbers are as follows:
1-heating rod bundle, 2-anode component, 3-cathode component, 4-DC power supply, 5-current shunt, 6-voltage transmitter, 7-anode conductive connecting device, 8-cathode conductive connecting device, 9-heating rod, 10-heating tube, 11-connecting wire, 12-insulating lock nut, 13-ceramic tube, 14-upper conductive electrode, 15-insulating heat-conducting sleeve, 16-temperature measuring ring, 17-ceramic fixing tube, 18-heating tube shell, 19-lower conductive electrode, 20-thermocouple, 21-electrode clamp, 22-power interface, 23-first through hole, 24-bolt, 25-middle electrode clamp, 26-end electrode clamp, 27-first groove and 28-second groove.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, a heating rod and a heating rod bundle device according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following detailed description, which should be construed to mean: the drawings are in simplified form and are not to precise scale, the intention being merely for convenience and clarity of illustrating embodiments of the invention. In the present invention, the terms "upper end", "upper portion", "upper" and the like mean an end near the positive electrode assembly 2, and the terms "lower end", "lower portion", "lower" and the like mean an end near the negative electrode assembly 3, and the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1, the present embodiment provides a heating rod, which includes a heating tube 10, and an upper conductive electrode 14 and a lower conductive electrode 19 respectively disposed at two axial ends of the heating tube 10, wherein the upper conductive electrode 14, the heating tube 10, and the lower conductive electrode 19 are all soldered by silver, and the upper conductive electrode 14 and the lower conductive electrode 19 are both made of T2 oxygen-free red copper. The heating pipe 10 comprises a heating pipe shell 18 and a hollow ceramic fixing pipe 17 arranged in the heating pipe shell 18 along the axial direction, the length of the heating pipe 10 and the thickness of the heating pipe shell 18 can be adjusted, the heating pipe 10 is made of Inconel 625 in the embodiment, the material is good in oxidation resistance, strong in acid and alkali corrosion resistance and capable of prolonging the service life.
Referring to fig. 1 and 2, the lower end of the ceramic fixing tube 17 is connected to a lower conductive electrode 19; a plurality of temperature measuring rings 16 are arranged on the outer side of the ceramic fixing pipe 17 at intervals along the axial direction, T2 oxygen-free red copper is selected as the material of the temperature measuring rings 16, and the ceramic fixing pipe is good in electrical conductivity and good in oxidation resistance. An insulating heat-conducting sleeve 15 is arranged between each temperature measuring ring 16 and the heating pipe shell 18, the insulating heat-conducting sleeve 15 is made of boron nitride, the insulating heat-conducting sleeve 15 is high-temperature-resistant, high in melting point, good in heat conductivity and insulating, and can prevent a temperature measuring probe from conducting electricity, so that the normal work of a thermocouple is influenced, and the precision of a measuring result is improved.
With reference to fig. 1, 2 and 3, the temperature measuring rings 16 are C-shaped, a plurality of grooves are formed in each temperature measuring ring 16, a thermocouple 20 is arranged in each groove, a probe of the thermocouple 20 is connected with the temperature measuring rings 16 through silver soldering, the thermocouple 20 is an armored thermocouple, the material is high-temperature-resistant, quick in thermal response time, and capable of improving measuring efficiency and accuracy. The connecting wires 11 of each thermocouple 20 converge along the outer wall of the ceramic fixing tube 17 inside the heating tube 10 and axially protrude from the inside of the upper conductive electrode 14. The plurality of temperature measuring thermocouples 20 are arranged in the temperature measuring ring 16, so that the problem that when the temperature of the inner wall surface of the heating pipe shell 18 rises, a local area is not arranged at the arranged temperature measuring points, so that the measuring result is inaccurate is solved, and the accuracy of the measuring result can be improved through the multipoint arrangement.
As shown in fig. 1, a hollow ceramic tube 13 is disposed inside the upper conductive electrode 14, the upper end of the ceramic tube 13 is connected to the upper end of the upper conductive electrode 14 through an insulating lock nut 12, and a gap exists between the lower end of the ceramic tube 13 and the ceramic fixing tube 17, so that the connecting wires 11 of the thermocouples 20 converge and extend into the upper conductive electrode 14 through the gap, and then extend out of the electric heating rod 9, and are connected to an external device (not shown) to measure and read relevant parameters.
As shown in fig. 4, the positions of the temperature measuring rings 16 are set according to the length of the heating tube 10 and the actual requirements, the temperature measuring rings 16 are arranged on the inner wall of the heating tube housing 18 from top to bottom in the axial direction, and the spacing distance between adjacent temperature measuring rings 16 generally increases from top to bottom in sequence, therefore, during the critical heat flux density experiment, the region where the local wall temperature rises is generally on the upper portion of the heating section, the spacing between the upper temperature measuring rings 16 is generally 20-30mm, and the spacing between the lower temperature measuring rings 16 can be 40-80mm, so as to improve the accuracy of the measurement result.
As shown in fig. 5, the present invention further provides a heating rod bundle device, which includes a heating rod bundle 1 composed of a plurality of heating rods 9, a positive electrode assembly 2 and a negative electrode assembly 3 respectively sleeved at two ends of the heating rod bundle 1, and a current shunt 5, a positive electrode conductive connection device 7, a dc power supply 4 and a negative electrode conductive connection device 8 sequentially arranged along a circuit backflow direction, wherein the dc power supply 4 adopts a low-voltage high-current power supply mode, the maximum voltage is 25V, the maximum current is 20000A, and the maximum power can reach 500kW, so that a pulse reactor reaction can be truly simulated, and a powerful support is provided for collecting relevant parameters. The heating rod cluster device further comprises a voltage transducer 6 disposed between the positive electrode assembly 2 and the negative electrode assembly 3.
As shown in fig. 6, the positive electrode assembly 2 and the negative electrode assembly 3 are respectively composed of a plurality of electrode clamps 21, the plurality of electrode clamps 21 are composed of a plurality of middle electrode clamps 25 and two end electrode clamps 26, the radial outer side of the end electrode clamps 26 is provided with a power interface 22 for connecting an external power supply, and the inner side is provided with a plurality of first grooves 27 with the same size along the axial direction; a plurality of second grooves 28 with the same size are respectively arranged on two radial sides of the middle electrode clamp 25 along the axial direction, and the sizes of the first grooves 27 and the second grooves 28 are also the same; the positions of the first groove 27 and the second groove 28 adjacent to the first groove 27 and the positions of the second grooves 28 on the adjacent sides of the two adjacent middle electrode clamps 25 respectively correspond to each other and respectively enclose a plurality of first through holes 23, the plurality of first through holes 23 correspond to the arrangement mode of the heating rods 9, and the inner diameter of each first through hole 23 is the same as the outer diameter of each heating rod 9; the heating rods 9 are held and fixed in the corresponding first through holes 23 by bolts 24 between the electrode clamps 21.
As a preferred aspect of the present invention, when the heating rod bundle device is installed, a corresponding number of insulating sheaths are added into the first through hole 23 of the positive electrode assembly 2 or the negative electrode assembly 3 to implement a separate heating function of one or more heating rods, specifically, the installation manner is as follows: during installation, the insulating sheath is sleeved on the heating rod (at a position corresponding to the first through hole 23), and then the electrode clamps 21 are fastened through the bolts 24, so that the real conditions of different reactor core arrangement modes in the pulse reactor can be truly simulated.
By the technical scheme, the critical heat flux density of the fluid in the rod bundle channel under the working condition of low pressure and low flow can be researched, the blank of the industry is made up, and powerful theory and data support are provided for researching the real pulse reactor reaction process.
The above description is intended only to illustrate the present invention and should not be construed as limiting the scope of the present invention, and variations and modifications to the above embodiments within the spirit and scope of the present invention should be considered by those skilled in the art to be within the scope of the appended claims.
Claims (10)
1. A heating rod, comprising: the device comprises a heating pipe (10), an upper conductive electrode (14) and a lower conductive electrode (19) which are respectively arranged at two axial ends of the heating pipe (10);
the heating pipe (10) comprises a heating pipe shell (18) and a hollow ceramic fixing pipe (17) which is axially arranged in the heating pipe shell (18), a plurality of temperature measuring rings (16) are axially arranged on the outer side of the ceramic fixing pipe (17) at intervals, a plurality of grooves are formed in each temperature measuring ring (16), a thermocouple (20) is arranged in each groove, and a connecting lead (11) of each thermocouple (20) is converged along the outer wall of the ceramic fixing pipe (17) in the heating pipe (10) and axially extends out of the upper conductive electrode (14); the lower end of the ceramic fixing tube (17) is connected with a lower conductive electrode (19).
2. A heating rod according to claim 1, wherein:
the temperature measuring ring (16) is of a C-shaped structure, and a probe of the thermocouple (20) is connected with the temperature measuring ring (16) through silver brazing.
3. A heating rod according to claim 2, wherein:
an insulating heat-conducting sleeve (15) is arranged between each temperature measuring ring (16) and the heating tube shell (18).
4. A heating rod according to claim 3, wherein:
go up conductive electrode (14) inside and be equipped with hollow ceramic tube (13), ceramic tube (13) upper end is connected through insulating lock nut (12) with last conductive electrode (14) upper end, has the clearance between lower extreme and ceramic fixed tube (17).
5. A heating rod according to claim 4, wherein:
the length of the heating pipe (10) and the thickness of the heating pipe shell (18) can be adjusted.
6. A heating rod according to claim 5, wherein:
the upper conductive electrode (14), the heating pipe (10) and the lower conductive electrode (19) are all connected by silver soldering.
7. A heating rod cluster apparatus, comprising: the heating device comprises a heating rod bundle (1) consisting of a plurality of heating rods (9), a positive electrode component (2) and a negative electrode component (3) which are respectively sleeved at two ends of the heating rod bundle (1), and a current shunt (5), a positive electrode conductive connecting device (7), a direct current power supply (4) and a negative electrode conductive connecting device (8) which are sequentially arranged along the circuit backflow direction; and a voltage transmitter (6) arranged between the positive electrode assembly (2) and the negative electrode assembly (3).
8. A heating rod cluster apparatus according to claim 7, wherein:
the positive electrode assembly (2) and the negative electrode assembly (3) are respectively composed of a plurality of electrode clamps (21), the electrode clamps (21) are composed of a plurality of middle electrode clamps (25) and two end electrode clamps (26), a power supply interface (22) is arranged on the radial outer side of each end electrode clamp (26), and a plurality of first grooves (27) with the same size are axially arranged on the inner side of each end electrode clamp; a plurality of second grooves (28) with the same size are respectively formed in the radial two sides of the middle electrode clamp (25) along the axial direction, and the sizes of the first grooves (27) and the second grooves (28) are also the same; the positions of the first grooves (27) and the second grooves (28) adjacent to the first grooves (27) and the positions of the second grooves (28) on the adjacent side of the adjacent middle electrode clamp (25) correspond to each other respectively and enclose a plurality of first through holes (23), the arrangement modes of the plurality of first through holes (23) correspond to the arrangement modes of the heating rods (9), and the inner diameters of the first through holes (23) are the same as the outer diameters of the heating rods (9); the heating rods (9) are clamped and fixed in the corresponding first through holes (23) by bolts (24) between the electrode clamps (21).
9. A heating rod cluster apparatus according to claim 8, wherein:
an insulating sheath can be added in the first through hole (23) to realize the independent heating function of the heating rod (9).
10. A heating rod cluster apparatus according to claim 9, wherein:
the direct current power supply (4) adopts a low-voltage high-current power supply mode, the maximum voltage is 25V, and the maximum current is 20000A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519763.1A CN114916101B (en) | 2022-05-12 | Heating rod and heating rod bundle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519763.1A CN114916101B (en) | 2022-05-12 | Heating rod and heating rod bundle device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114916101A true CN114916101A (en) | 2022-08-16 |
| CN114916101B CN114916101B (en) | 2024-06-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318524A (en) * | 2018-03-12 | 2018-07-24 | 山东亚特尔集团股份有限公司 | Ground heat exchanger scene thermophysical property measurement instrument calibration equipment Special temperature measurement stick |
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| CN105007641A (en) * | 2015-07-29 | 2015-10-28 | 中科华核电技术研究院有限公司 | Heating rod used for critical heat flux density test |
| EP3489629A1 (en) * | 2017-11-27 | 2019-05-29 | Commissariat à l'Energie Atomique et aux Energies Alternatives | Arrangement for mapping temperature and deformation of a structure, especially a wall of a nuclear fuel pencil |
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| WO2022000518A1 (en) * | 2020-06-30 | 2022-01-06 | 嘉兴微知电子有限公司 | Four-wire heating internally-heated electronic cigarette heating rod |
| CN113916393A (en) * | 2021-10-22 | 2022-01-11 | 中国原子能科学研究院 | Thermocouple protective tube and fast reactor intermediate heat exchanger |
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| CN108318524A (en) * | 2018-03-12 | 2018-07-24 | 山东亚特尔集团股份有限公司 | Ground heat exchanger scene thermophysical property measurement instrument calibration equipment Special temperature measurement stick |
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