Auxiliary heat conduction device for sodium-containing pipeline electric heater

Abstract

The present disclosure belongs to the field of nuclear power technology, and particularly relates to an auxiliary heat conduction device for a sodium-related pipeline electric heater. In the present disclosure, the shape of the first gasket is adapted to the outer shape of the area of the electric heater facing the sodium-related pipeline, so that the first gasket can fitly wrap the area of the outer side of the electric heater facing the sodium-related pipeline; the shape of the second gasket is adapted to the outer shape of the sodium-related pipeline and the area of the component outside the sodium-related pipeline facing the electric heater, so that the first gasket can fitly wrap the area of the outer side of the sodium-related pipeline facing the electric heater; the edge contour of the heat conduction filling is adapted to the edge contour of the gap between the first gasket and the second gasket, so that the heat conduction filling fits and connects in the gap between the first gasket and the second gasket. It can make the electric heater be in full contact with the pipeline, and solves the problem that there is a suspended area in the electric heater.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to an auxiliary heat conduction device of an electric heater for a sodium-related pipeline. Background Art

[0002] The melting point of metallic sodium is 97.72°C. In order to keep the sodium medium in the sodium-related pipeline in a fluid state at all times, an electric heater needs to be installed outside the pipeline for heating. After reaching 250°C, an automatic thermostat is used to set high and low temperature values ​​for insulation and heating. The temperature in some areas will reach above 300°C.

[0003] like Figure 3 As shown, the installation method of the armored electric heater is to lay it flat and close to the pipeline. It will not be disconnected when encountering valves, flanges or pipeline bracket clips, and it will be laid closely along their shape.

[0004] Since the heating wire (material: Cr20Ni80) and the cladding (material: 316L) of the electric heater are both made of metal, and the bending radius during installation must not be less than 6 times its outer diameter, so at locations such as valves, flanges or pipe brackets, Figure 4 As shown in the figure, there is a gap between the electric heater and the heating pipe, and the gap is not completely fitted. After the electric heater is put into operation, the suspended area cannot fully conduct heat, which will cause dry burning and reduce the service life. In severe cases, the electric heater will be burned. This defect is common in the sodium-related test equipment and sodium bench projects that have been in operation. Therefore, how to make the electric heater and the sodium-related pipeline fully conduct heat has become an urgent problem to be solved. Summary of the invention

[0005] In order to overcome the problems existing in the related art, an auxiliary heat conduction device for a sodium-related pipeline electric heater is provided.

[0006] According to one aspect of an embodiment of the present disclosure, an auxiliary heat conduction device of a sodium-related pipeline electric heater is provided, the auxiliary heat conduction device of the sodium-related pipeline electric heater comprises: a first liner, a heat conductive filling and a second liner, wherein the first liner, the second heat conductive filling and the second liner are capable of heat conduction;

[0007] The shape of the first liner is adapted to the outer shape of the area of ​​the electric heater facing the sodium-related pipeline, so that the first liner can fitly wrap the area of ​​the electric heater facing the sodium-related pipeline;

[0008] The shape of the second liner is adapted to the outer side of the sodium-related pipeline and the outer area of ​​the sodium-related pipeline facing the electric heater, so that the first liner can fitly wrap the outer area of ​​the sodium-related pipeline facing the electric heater;

[0009] The edge profile of the heat-conducting filler is adapted to the edge profile of the gap between the first gasket and the second gasket, so that the heat-conducting filler is fitted and connected in the gap between the first gasket and the second gasket.

[0010] In a possible implementation manner, the first gasket and the second gasket are in a groove shape.

[0011] In a possible implementation manner, the heat-conducting filler is in a mesh structure.

[0012] In a possible implementation manner, one end of the first gasket is connected to one end of the second gasket at the position where the electric heater contacts the sodium-containing pipeline.

[0013] In a possible implementation manner, the other end of the first gasket is connected to the other end of the second gasket at the position where the electric heater contacts the outer component of the sodium-containing pipeline.

[0014] In a possible implementation manner, the two side edges of the first gasket have a plurality of clamps, and the plurality of clamps surround the outside of the electric heater.

[0015] In a possible implementation manner, the material of the heat-conducting filler is copper, and the materials of the first gasket and the second gasket are stainless steel.

[0016] In a possible implementation manner, the first gasket and the second gasket are metal sheets, and the heat-conducting filler is a metal mesh.

[0017] The beneficial effect of the present disclosure is that: for the auxiliary heat-conducting device of the sodium-containing pipeline electric heater of the present disclosure, the first gasket and the electric heater are fully fitted and have good wrapping property, the second gasket and the sodium-containing pipeline are fully fitted and have good wrapping property, and the heat-conducting filler can fully fill the gap between the first gasket and the second gasket, so that the electric heater can be in full contact with the pipeline, solving the problem that there are suspended areas in the electric heater. Description of the Drawings

[0018] Figure 1 is a schematic diagram of an auxiliary heat-conducting device of a sodium-containing pipeline electric heater shown according to an exemplary embodiment.

[0019] Figure 2 is a schematic diagram of an auxiliary heat-conducting device of a sodium-containing pipeline electric heater shown according to an exemplary embodiment.

[0020] Figure 3 is a schematic diagram of the installation between the electric heater and the sodium-containing pipeline in an example.

[0021] Figure 4 is a schematic diagram of the gap between the electric heater and the sodium-containing pipeline in an example.

[0022] In the figure:

[0023] 1. Components outside the sodium-related pipeline; 2. Electric heater; 3. Sodium-related pipeline; 4. Gap;

[0024] 5. First gasket; 6. Thermal conductive filling; 7. Second gasket. Detailed implementation manners

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 is a schematic diagram of an auxiliary heat conduction device for a sodium-related pipeline electric heater shown according to an exemplary embodiment. Figure 2 is a schematic diagram of an auxiliary heat conduction device for a sodium-related pipeline electric heater shown according to an exemplary embodiment. As Figure 1 and Figure 2 shown, the auxiliary heat conduction device of the sodium-related pipeline electric heater includes: a first gasket 5, a thermal conductive filling 6, and a second gasket 7. The first gasket, the second thermal conductive filling, and the second gasket can conduct heat. For example, the material of the electric heating gasket can be: 316L stainless steel sheet; the material of the thermal conductive filling can be: wire mesh-shaped copper metal sheet. The melting point of copper is 1083°C, the thermal conductivity is 386.4 w / (m·k), the pure copper material is soft, has good plasticity, and high thermal conductivity; the material of the pipeline gasket can be: 316L stainless steel sheet.

[0027] It should be noted that the materials of the first gasket, the second gasket, and the thermal conductive filling can be metals or thermal conductive ceramics, etc. The present disclosure does not limit the material types of the first gasket, the second gasket, and the thermal conductive filling.

[0028] As Figures 1 to 4 shown, the shape of the first gasket 5 is adapted to the outer shape of the area of the electric heater 2 facing the sodium-related pipeline 3, so that the first gasket 5 can fitly wrap the area of the electric heater 2 facing the sodium-related pipeline 3; the shape of the second gasket 7 is adapted to the outer shape of the sodium-related pipeline 3 and the area of the components outside the sodium-related pipeline 1 (where the components outside the sodium-related pipeline can be, for example, components such as valves, flanges, or pipeline bracket clips, and the present disclosure does not limit the specific types and shapes of the components) facing the electric heater 2, so that the first gasket 5 can fitly wrap the area of the sodium-related pipeline 3 facing the electric heater 2; the edge contour of the thermal conductive filling 6 is adapted to the edge contour of the gap 4 between the first gasket 5 and the second gasket 7, so that the thermal conductive filling 6 fitsly connects in the gap 4 between the first gasket 5 and the second gasket 7.

[0029] The first gasket of the auxiliary heat conduction device of the sodium-related pipeline electric heater of the present disclosure is fully attached to the electric heater with good wrapping property, the second gasket is fully attached to the sodium-related pipeline with good wrapping property, and the heat conduction filler can fully fill the gap between the first gasket and the second gasket, so that the electric heater can be in full contact with the pipeline, solving the problem of the existence of suspended areas in the electric heater.

[0030] In a possible implementation, the first gasket and the second gasket are in a groove shape, and one end of the first gasket is connected to one end of the second gasket at the position where the electric heater contacts the sodium-related pipeline. The other end of the first gasket is connected to the other end of the second gasket at the position where the electric heater contacts the outer components of the sodium-related pipeline.

[0031] In this way, the connection between the first gasket and the second gasket adopts a groove design to ensure their radial fixation and prevent rotation and misalignment; the two ends of the first gasket and the second gasket are respectively connected to each other, effectively increasing the stability of the auxiliary heat conduction device of the sodium-related pipeline electric heater.

[0032] In a possible implementation, the two side edges of the first gasket have a plurality of clamps, and the plurality of clamps surround the outside of the electric heater. The plurality of clamps can fix the first gasket to the electric heater, enhancing the connection stability between the first gasket and the electric heater.

[0033] In a possible implementation, the first gasket and the second gasket are metal sheets, and the heat conduction filler is a metal mesh. In this way, the first gasket, the second gasket, and the heat conduction filler are easy to shape and can be adjusted according to the size of the suspended area, with strong applicability.

[0034] In an application example, installing the auxiliary heat conduction device of the sodium-related pipeline electric heater of the present disclosure includes the following steps:

[0035] Step 100, prefabricate the laying path of the armored electric heater at positions such as valves, flanges, or pipe bracket clips according to the installation requirements;

[0036] Step 101, fully attach the first gasket to the prefabricated electric heater to copy the shape and determine the installation length dimension;

[0037] Step 102, fully attach the second gasket to the sodium-related pipeline and the support (valve, flange) to make the shape;

[0038] Step 103, assemble the first gasket and the second gasket;

[0039] Step 104, fill the cavity between the first gasket and the second gasket with the heat conduction filler;

[0040] Step 105, lock the plurality of clamps of the first gasket to connect the first gasket to the electric heater.

[0041] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements to the technology in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An auxiliary heat conduction device for a sodium-related pipeline electric heater, characterized in that The auxiliary heat conduction device of the sodium-related pipeline electric heater includes: a first gasket, a heat conduction filler, and a second gasket, and the first gasket, the heat conduction filler, and the second gasket can conduct heat; The shape of the first gasket is adapted to the outer shape of the area of the electric heater facing the sodium-related pipeline, so that the first gasket can fit and wrap the area of the outer side of the electric heater facing the sodium-related pipeline; The shape of the second gasket is adapted to the outer shape of the sodium-related pipeline and the area of the outer component of the sodium-related pipeline facing the electric heater, so that the first gasket can fit and wrap the area of the outer side of the sodium-related pipeline facing the electric heater; The edge contour of the heat conduction filler is adapted to the edge contour of the gap between the first gasket and the second gasket, so that the heat conduction filler fits and is connected in the gap between the first gasket and the second gasket.

2. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that, The first gasket and the second gasket are in the shape of a groove.

3. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that, The heat conduction filler is a mesh structure.

4. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that, One end of the first gasket is connected to one end of the second gasket at the position where the electric heater contacts the sodium-related pipeline.

5. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that, The other end of the first gasket is connected to the other end of the second gasket at the position where the electric heater contacts the outer component of the sodium-related pipeline.

6. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that Both sides of the first gasket have a plurality of clamps, and the plurality of clamps surround the outside of the electric heater.

7. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that, The material of the heat conduction filler is copper, and the materials of the first gasket and the second gasket are stainless steel.

8. The auxiliary heat conduction device of the sodium-related pipeline electric heater according to claim 1, characterized in that The first gasket and the second gasket are metal sheets, and the heat conduction filler is a metal mesh.

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