CN111050435A - Resistance controllable heating plate along length direction and preparation process thereof - Google Patents
Resistance controllable heating plate along length direction and preparation process thereof Download PDFInfo
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- CN111050435A CN111050435A CN202010033843.7A CN202010033843A CN111050435A CN 111050435 A CN111050435 A CN 111050435A CN 202010033843 A CN202010033843 A CN 202010033843A CN 111050435 A CN111050435 A CN 111050435A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 182
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 28
- 230000008859 change Effects 0.000 claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 abstract description 16
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910001119 inconels 625 Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
-
- 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—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
-
- 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—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater 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
Abstract
The invention discloses a resistance controllable heating plate along the length direction and a preparation process thereof. This along controllable board that generates heat of length direction resistance includes at least two-layer that generates heat, the thickness on layer that generates heat is continuous gradient along length direction and changes, and one in two adjacent layers that generate heat generates heat the layer and become opposite change along length direction's thickness with another layer that generates heat, and two adjacent connection contact surfaces that generate heat between the layer are the curved surface, and two adjacent materials that generate heat the layer are different. The heating plate is formed by laminating a plurality of heating layers made of different materials, and the resistance of the heating plate is accurately controlled to be continuously changed along the length direction by designing the thickness of the heating layers to be continuously changed in a gradient manner along the length direction, so that the metal plate with the controllable resistance along the length direction, provided by the invention, can be applied to a simulation test of heating of a fuel plate.
Description
Technical Field
The invention relates to the technical field of thermal energy engineering, in particular to a heating plate with controllable resistance along the length direction and a preparation process thereof.
Background
In a nuclear reactor, there are a large number of fuel rods or fuel plates, and the amount of heat generation thereof is not uniform in the longitudinal direction (axial direction). In the design process, relevant experiments are required to be carried out to research relevant performances of the fuel, and the common experiments adopt electric heating to simulate nuclear heat release of the fuel, so that the heat generation rate of the heat generation layer used for the experiments along the length direction is required to be controllable, namely the resistance of the heat generation layer along the length direction is required to be accurately controlled according to requirements.
The method which can be researched at present and meets the functions is to adopt a gradient functional material which is a novel composite material formed by compounding two or more materials and continuously changing the components and the structure in a gradient way, and the gradient functional material is formed by continuously changing the components and the structure of the two (or more) materials to ensure that the interface disappears, so that the performance of the material is slowly changed along with the change of the components and the structure of the material. With the development of functionally gradient materials, they exhibit unique characteristics in aerospace, nuclear reactors, electromagnetism, medicine and biology, optics and chemistry, and many functionally gradient materials have been used in engineering. However, the production cost thereof is high, and it is difficult to achieve continuous variation of the resistivity.
Disclosure of Invention
The invention aims to provide a heating plate with controllable resistance along the length direction and a preparation process thereof, so as to solve the technical problem.
In order to solve the technical problems, the technical scheme of the invention is as follows:
according to a first aspect, the invention provides a heating plate with controllable resistance along the length direction, which comprises at least two heating layers, wherein the thickness of each heating layer changes in a continuous gradient manner along the length direction, the thickness of one heating layer in two adjacent heating layers along the length direction is opposite to that of the other heating layer along the length direction, the connecting contact surface between the two adjacent heating layers is a curved surface, and the two adjacent heating layers are made of different materials.
As a preferred scheme of the invention, the number of the heating layers is 2-3.
In a preferred embodiment of the present invention, the heat generating layer is made of metal or alloy.
As a preferred scheme of the present invention, the number of the heating layers is 2, the resistance-controllable heating plate along the length direction is formed by laminating an upper heating layer and a lower heating layer, a lower surface of the upper heating layer protrudes downward to form a convex curved surface, and an upper surface of the lower heating layer is recessed downward to form a concave curved surface adapted to the convex curved surface.
Furthermore, the convex curved surface of the upper heating layer is fixedly connected with the concave curved surface of the lower heating layer in a welding mode.
As a preferred scheme of the present invention, the number of the heating layers is 3, the resistance-controllable heating plate along the length direction is formed by sequentially stacking an upper heating layer, a middle heating layer, and a lower heating layer from top to bottom, the lower surface of the upper heating layer is recessed upward to form a recessed curved surface, the upper surface of the lower heating layer is recessed downward to form a recessed curved surface, the recessed curved surface of the upper heating layer and the recessed curved surface of the lower heating layer form a cavity, the middle heating layer is accommodated in the cavity, and the thickness of the middle heating layer is gradually reduced from the center to the edge.
Furthermore, the upper surface of the middle heating layer is fixedly connected with the concave curved surface of the upper heating layer in a welding mode, and the lower surface of the middle heating layer is fixedly connected with the concave curved surface of the lower heating layer in a welding mode.
Furthermore, the upper heating layer, the middle heating layer and the lower heating layer are made of different materials.
In a second aspect, the invention provides a process for preparing a heating plate with controllable resistance along the length direction, which comprises the following steps:
(1) calculating a resistance value range and a resistance use parameter range which need to be controlled according to a simulation object, and selecting the material of each heating layer;
(2) calculating a variation function of the thickness of each heating layer along the length direction according to the heat flow distribution input condition;
(3) processing and manufacturing the heating layer with the thickness continuously changing in a gradient manner along the length direction according to the change function;
(4) and welding two adjacent heating layers along the contact surface under the vacuum condition to obtain the heating plate with controllable resistance along the length direction.
As a preferable embodiment of the present invention, the simulation object in the step (1) is a fuel plate.
Compared with the prior art, the invention has the beneficial effects that:
the heating plate is formed by laminating a plurality of heating layers made of different materials, and the resistance of the heating plate is accurately controlled to be continuously changed along the length direction by designing the thickness of the heating layers to be continuously changed in a gradient manner along the length direction, so that the metal plate with the controllable resistance along the length direction, provided by the invention, can be applied to a simulation test of heating of a fuel plate, and the heating of the fuel plate is simulated through electric heating; in addition, the preparation process provided by the invention is simple, the production cost is low, and the use and popularization are convenient.
Drawings
The following further describes embodiments of the present invention with reference to the drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
Fig. 1 is a schematic structural diagram of a heating plate with controllable resistance along a length direction according to embodiment 1 of the present invention;
fig. 2 is a schematic view of a heating panel according to embodiment 1 of the present invention, in which the resistance changes along the length direction;
fig. 3 is a schematic structural diagram of a heating plate with controllable resistance along the length direction according to embodiment 2 of the present invention;
fig. 4 is a schematic diagram of the resistance of the heating panel according to embodiment 2 of the present invention changing along the length direction.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it should be noted that all the directional indicators (such as up, down, left, right, front, and back … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the description of the present invention, it is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The heating plate with the controllable resistance along the length direction comprises at least two heating layers, the thickness of each heating layer is in continuous gradient change along the length direction, the thickness of one heating layer in the length direction of the two adjacent heating layers is opposite to that of the other heating layer in the length direction of the two adjacent heating layers, the connecting contact surface between the two adjacent heating layers is a curved surface, and the two adjacent heating layers are different in material.
Specifically, the number of the heating layers is 2-3.
Specifically, the heating layer is made of metal or alloy.
It will be appreciated that the overall thickness of the length-wise resistance controllable heat generating plate of the present invention may be determined according to the fuel plate to be simulated. The heating plate is formed by laminating a plurality of heating layers made of different materials, and the resistance of the heating plate is accurately controlled to be continuously changed along the length direction by designing the thickness of the heating layers to be continuously changed in a gradient manner along the length direction, so that the metal plate with the controllable resistance along the length direction, provided by the invention, can be applied to a simulation test of heating of a fuel plate.
In the description of the present invention, it should be noted that the alloy of the present invention refers to a substance synthesized by two or more metals and metals or non-metals through the existing preparation process and having the characteristics of metal.
Example 1
As shown in fig. 1, the resistance controllable heating plate along the length direction provided in this embodiment is formed by laminating an upper heating layer 1 and a lower heating layer 2, a lower surface of the upper heating layer 1 protrudes downward to form a convex curved surface, and an upper surface of the lower heating layer 2 is recessed downward to form a recessed curved surface adapted to the convex curved surface.
The embodiment also provides a preparation process of the resistance-controllable heating plate along the length direction, which comprises the following steps:
(1) calculating a resistance value range and a resistance use parameter range which need to be controlled according to the simulation object fuel plate, and selecting the materials of the upper heating layer 1 and the lower heating layer 2; for example, the upper heating layer 1 is made of 321-grade stainless steel; the lower heating layer 2 is made of an alloy with the trade name of INCONEL625, the thermal expansion rate and the thermal conductivity of the two materials are similar, the two materials cannot fail due to the thermal expansion difference of different layers during heating, the resistivity difference of the two materials is large, and the large control range of the resistance along the length direction can be controlled;
(2) respectively calculating the variation functions of the thicknesses of the upper heating layer 1 and the lower heating layer 2 along the length direction according to the heat flow distribution input conditions;
(3) processing and manufacturing a heating layer 1 and a lower heating layer 2 with the thickness continuously changing in a gradient manner along the length direction according to a change function;
(4) and welding two adjacent heating layers along the contact surface under the vacuum condition to obtain the heating plate with controllable resistance along the length direction.
The trend that the resistance of the resistance controllable heating plate along the length direction manufactured by the embodiment changes along the length direction is shown in fig. 2, the resistance of the heating plate is accurately controlled to continuously change along the length direction by designing the thickness of the heating layer to continuously change in a gradient manner along the length direction, and the heating rate of the heating plate along the length direction is controllable in the process of simulating the nuclear heat release of fuel by adopting electric heating, so that the resistance controllable heating plate along the length direction provided by the invention can be applied to a simulation test of the heating of the fuel plate.
In this embodiment, the convex curved surface of the upper heating layer 1 and the concave curved surface of the lower heating layer 2 are fixedly connected by welding, so that the strength of the whole heating plate can be ensured.
Example 2
As shown in fig. 3, the resistance controllable heating plate along the length direction provided by this embodiment is formed by sequentially stacking an upper heating layer 1, a middle heating layer 3, and a lower heating layer 2 from top to bottom, wherein the lower surface of the upper heating layer 1 is recessed upward to form a recessed curved surface, the upper surface of the lower heating layer 2 is recessed downward to form a recessed curved surface, the recessed curved surface of the upper heating layer 1 and the recessed curved surface of the lower heating layer 2 form a cavity, the middle heating layer 3 is accommodated in the cavity, and the thickness of the middle heating layer 3 is gradually reduced from the center to the edge.
In this embodiment, the upper heat generating layer 1, the middle heat generating layer 3, and the lower heat generating layer 2 are made of different materials.
The embodiment also provides a preparation process of the resistance-controllable heating plate along the length direction, which comprises the following steps:
(1) calculating a resistance value range and a resistance use parameter range which need to be controlled according to the simulation object fuel plate, and selecting the materials of the upper heating layer 1 and the lower heating layer 2; for example, the upper heating layer 1 is made of 321-grade stainless steel; the middle heating layer 2 is made of alloy with the mark of INCONEL625, the lower heating layer 3 is made of stainless steel with the mark of 304, the thermal expansion rates and the thermal conductivities of the three materials are similar, the three materials cannot fail due to the thermal expansion difference of different layers during heating, the resistivity difference of the three materials is large, and the large resistance control range along the length direction can be controlled;
(2) respectively calculating the variation functions of the thicknesses of the upper heating layer 1, the middle heating layer 3 and the lower heating layer 2 along the length direction according to the heat flow distribution input conditions;
(3) processing and manufacturing a heating layer 1, a middle heating layer 3 and a lower heating layer 2 with the thickness continuously changing in a gradient manner along the length direction according to a change function;
(4) and welding two adjacent heating layers along the contact surface under the vacuum condition to obtain the heating plate with controllable resistance along the length direction.
The trend that the resistance of the resistance controllable heating plate along the length direction manufactured by the embodiment changes along the length direction is shown in fig. 4, the resistance of the heating plate is accurately controlled to continuously change along the length direction by designing the thickness of the heating layer to continuously change in a gradient manner along the length direction, and the heating rate of the heating plate along the length direction is controllable in the process of simulating the nuclear heat release of fuel by adopting electric heating, so that the resistance controllable heating plate along the length direction provided by the invention can be applied to a simulation test of the heating of the fuel plate.
In this embodiment, the upper surface of the middle heating layer 3 is fixedly connected with the concave curved surface of the upper heating layer 1 in a welding manner, and the lower surface of the middle heating layer 3 is fixedly connected with the concave curved surface of the lower heating layer 2 in a welding manner, so that the strength of the whole heating plate can be ensured.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (9)
1. The utility model provides an along controllable board that generates heat of length direction resistance, its characterized in that, includes at least two-layer layers that generate heat, the thickness on layer that generates heat is continuous gradient change along length direction, and one in two adjacent layers that generate heat generates heat the layer and along length direction's thickness with another layer that generates heat and become opposite change along length direction's thickness, and two adjacent connection contact surfaces that generate heat between the layer are the curved surface, and two adjacent materials that generate heat the layer are different.
2. The heating panel with controllable resistance along the length direction of claim 1, wherein the number of the heating layers is 2-3.
3. The heating panel with controllable resistance along the length direction of claim 1, wherein the heating layer is made of metal or alloy.
4. The resistance-controllable heating panel along the length direction according to claim 1, wherein the number of the heating layers is 2, the resistance-controllable heating panel along the length direction is formed by laminating an upper heating layer and a lower heating layer, the lower surface of the upper heating layer protrudes downward to form a convex curved surface, and the upper surface of the lower heating layer is recessed downward to form a concave curved surface adapted to the convex curved surface.
5. The resistance-controllable heating panel according to claim 4, wherein the convex curved surface of the upper heating layer is fixedly connected with the concave curved surface of the lower heating layer by welding.
6. The resistance-controllable heating panel according to claim 1, wherein the number of the heating layers is 3, the resistance-controllable heating panel according to the length direction is formed by sequentially stacking an upper heating layer, a middle heating layer, and a lower heating layer from top to bottom, a lower surface of the upper heating layer is recessed upward to form a recessed curved surface, an upper surface of the lower heating layer is recessed downward to form a recessed curved surface, the recessed curved surface of the upper heating layer and the recessed curved surface of the lower heating layer form a cavity, the middle heating layer is accommodated in the cavity, and the thickness of the middle heating layer is gradually reduced from the center to the edge.
7. The resistance-controllable heating panel according to claim 6, wherein the upper surface of the middle heating layer is fixedly connected to the concave curved surface of the upper heating layer by welding, and the lower surface of the middle heating layer is fixedly connected to the concave curved surface of the lower heating layer by welding.
8. The heating panel with controllable resistance along the length direction of claim 6, wherein the upper heating layer, the middle heating layer and the lower heating layer are made of different materials.
9. A process for preparing a heating panel with controllable resistance along the length direction according to any of claims 1 to 8, comprising the steps of:
(1) calculating a resistance value range and a resistance use parameter range which need to be controlled according to a simulation object, and selecting the material of each heating layer;
(2) calculating a variation function of the thickness of each heating layer along the length direction according to the heat flow distribution input condition;
(3) processing and manufacturing the heating layer with the thickness continuously changing in a gradient manner along the length direction according to the change function;
(4) and welding two adjacent heating layers along the contact surface under the vacuum condition to obtain the heating plate with controllable resistance along the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010033843.7A CN111050435A (en) | 2020-01-13 | 2020-01-13 | Resistance controllable heating plate along length direction and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010033843.7A CN111050435A (en) | 2020-01-13 | 2020-01-13 | Resistance controllable heating plate along length direction and preparation process thereof |
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| CN111050435A true CN111050435A (en) | 2020-04-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111918423A (en) * | 2020-08-31 | 2020-11-10 | 江苏启程电热科技有限公司 | Anti-condensation and corrosion-resistant PTC electric heater and manufacturing method thereof |
| CN113587712A (en) * | 2021-08-25 | 2021-11-02 | 中国核动力研究设计院 | Heating flow channel with controllable heat flow density ratio and application |
| CN113649596A (en) * | 2021-08-25 | 2021-11-16 | 中国核动力研究设计院 | Axial resistance continuous controllable alloy plate based on 3D printing and preparation method |
| CN113939049A (en) * | 2021-10-13 | 2022-01-14 | 中国核动力研究设计院 | Axial non-uniform heat generation electric heating rod and preparation process and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111918423A (en) * | 2020-08-31 | 2020-11-10 | 江苏启程电热科技有限公司 | Anti-condensation and corrosion-resistant PTC electric heater and manufacturing method thereof |
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| CN113939049A (en) * | 2021-10-13 | 2022-01-14 | 中国核动力研究设计院 | Axial non-uniform heat generation electric heating rod and preparation process and application thereof |
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Application publication date: 20200421 |