CN212455977U - Heat preservation device for nuclear pipeline - Google Patents
Heat preservation device for nuclear pipeline Download PDFInfo
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- CN212455977U CN212455977U CN202021695114.XU CN202021695114U CN212455977U CN 212455977 U CN212455977 U CN 212455977U CN 202021695114 U CN202021695114 U CN 202021695114U CN 212455977 U CN212455977 U CN 212455977U
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Abstract
The utility model discloses a heat preservation device for a nuclear pipeline, which comprises at least two heat preservation blocks which are in one-to-one correspondence in shape and size and are spliced and coated on the outer wall of the nuclear pipeline; each heat-insulating block comprises an inner plate, an outer plate, a two-axial baffle and two radial baffles, wherein the two-axial baffle and the two-radial baffle are fixedly packaged between the inner plate and the outer plate; and a metal reflection type heat insulation structure capable of reducing heat conduction is filled between the inner plate, the outer plate, the two axial baffles and the two radial baffles. The heat preservation device for the nuclear pipeline is compact in structure, suitable for a nuclear elbow pipeline and a nuclear straight pipeline, wide in application range, convenient to assemble and disassemble, high in strength and long in service life, the metal reflection type heat preservation structure is filled in the heat preservation block, heat conduction of the nuclear pipeline to the external environment can be effectively reduced, the heat preservation effect is good, the practicability is good, and the heat preservation device has wide industrial application prospects.
Description
Technical Field
The utility model belongs to the technical field of the heat preservation device, concretely relates to heat preservation device for nuclear pipeline.
Background
The nuclear power station generates electricity by using heat released by nuclear fission reaction, and a large amount of heat energy is stored in a pipeline for the nuclear power station. In order to reduce heat loss and reduce the working environment temperature in the nuclear island, a heat preservation device or a heat preservation structure needs to be installed outside the nuclear pipeline.
In the conventional heat insulation structure for the industrial pipeline, the heat insulation layer with the heat insulation function is made of non-metallic materials such as microporous calcium silicate, superfine glass wool and the like. The inventor of the utility model finds that the heat preservation structure made of the non-metallic material is not suitable for the nuclear pipeline with high radioactivity. The non-metallic material is activated by radioactivity when being used near a nuclear reactor, is easy to embrittle, has suddenly reduced heat-insulating property, shortened service life, shortened maintenance period, increased maintenance and replacement cost and generates a large amount of non-metallic solid waste with radioactivity; in addition, the nonmetal material is easy to generate radioactive dust after being embrittled, which causes dust and radiation pollution and influences the body health of staff; moreover, when a nuclear power station has a loss of coolant accident, the embrittled non-metallic material is easy to run off with water after being soaked in water, and blocks a pit filter, thereby further causing potential safety hazards in the nuclear island. Therefore, how to design or develop a heat preservation device for a nuclear pipeline, which has a long service life, is convenient to disassemble and assemble, and has a good heat preservation effect becomes a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
To the above defect of prior art or improve the demand, the utility model provides a heat preservation device for nuclear pipeline, long service life, dismouting are convenient and the heat preservation effect is good, and the practicality is good.
The purpose of the utility model is to realize through the following technical scheme:
the utility model discloses a heat preservation device for a nuclear pipeline, which comprises at least two heat preservation blocks which are in one-to-one correspondence in shape and size and are spliced and coated on the outer wall of the nuclear pipeline; each heat-insulating block comprises an inner plate, an outer plate, a two-axial baffle and two radial baffles, wherein the two-axial baffle and the two-radial baffle are fixedly packaged between the inner plate and the outer plate; and a metal reflection type heat insulation structure capable of reducing heat conduction is filled between the inner plate, the outer plate, the two axial baffles and the two radial baffles.
Furthermore, the metal reflection type heat preservation structure comprises a plurality of layers of metal foils arranged in parallel, each metal foil is provided with a concave-convex structure, and the concave-convex structures of two adjacent metal foils are arranged in a staggered mode.
Furthermore, the surface roughness Ra of the metal foil is less than or equal to 0.05 mu m, and the normal emissivity is less than or equal to 0.23 mu m.
Further, the metal foil is gold foil, silver foil, titanium alloy foil or stainless steel foil.
Further, the shape of the inner plate is matched with the shape of the outer wall of the nuclear pipeline.
Further, the tooth-shaped support plate is fixedly welded on the inner surface of the inner plate along the circumferential direction.
Furthermore, a plurality of hasp locks for lap joint locking are arranged at the corresponding positions of the two heat preservation blocks which are spliced with each other.
Furthermore, at least one handle convenient to hold is further arranged on the outer plate.
Furthermore, the handle is a spring type handle tightly attached to the outer surface of the outer plate.
Furthermore, the inner plate, the outer plate, the two axial baffles and the two radial baffles are fixedly welded through L-shaped connecting plates.
Compared with the prior art, the technical scheme of the utility model has following advantage:
in the heat preservation device for the nuclear pipeline, the heat preservation blocks are coated on the outer wall of the nuclear pipeline in a splicing manner, the structure is compact, the efficiency of disassembly, assembly and replacement is improved due to the arrangement of the handle and the hasp lock, and the operation is convenient and fast; the heat insulation block structure is made of radiation-resistant metal plates, the strength is high, the service life is long, and the metal reflection type heat insulation structure is filled in the heat insulation block, so that the heat conduction of the nuclear pipeline to the external environment can be effectively reduced, and the heat insulation effect is good; furthermore, the utility model provides a heat preservation device for nuclear pipeline both had been applicable to nuclear elbow pipeline, had been applicable to nuclear straight pipeline again, and application scope is wide, and the practicality is good, has extensive industrial application prospect.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the specific embodiments. The drawings are only for purposes of illustrating the particular embodiments and are not to be construed as limiting the invention. In the drawings:
fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the heat-insulating block of the present invention;
FIG. 3 is a side view of the tooth support plate of the present invention;
FIG. 4 is a schematic view of the metal reflection type heat insulation structure of the present invention;
fig. 5 is a schematic structural view of the buckle lock of the present invention;
fig. 6 is a front view of the first embodiment of the present invention;
fig. 7 is a side view of the structure of the first embodiment of the present invention;
fig. 8 is a front view of the structure of the second embodiment of the present invention;
fig. 9 is a structural side view of a second embodiment of the present invention;
wherein: 10. a heat preservation block; 11. an inner plate; 12. an outer plate; 13. an axial baffle; 14. a radial baffle; 15. a tooth-shaped support plate; 16. an L-shaped connecting plate; 20. a metal reflection-type heat insulation structure; 21. a metal foil; 22. a relief structure; 30. a hasp lock; 31. a hasp; 32. hooking; 40. a handle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Examples of the embodiments are illustrated in the accompanying drawings, and the specific embodiments described in the following embodiments of the present invention are merely illustrative of the specific embodiments of the present invention, and are intended to be used for explaining the present invention, and not to constitute limitations of the present invention.
The utility model discloses a heat preservation device for nuclear pipeline can keep warm to pipeline for nuclear reaction (including straight pipeline and curved pipeline), as shown in FIG. 1, heat preservation device includes the insulating block 10 of two at least shapes, size one-to-ones, each the insulating block 10 splices each other and the cladding is on the outer wall of nuclear pipeline, compact structure.
As shown in fig. 2, each of the thermal insulation blocks 10 includes an inner plate 11 close to the nuclear pipeline, an outer plate 12 relatively far away from the nuclear pipeline, and two axial baffles 13 and two radial baffles 14 for fixedly encapsulating the inner plate 11 and the outer plate 12. Further, in order to ensure the coating effect of the heat insulation block on the nuclear pipeline, the shape of the inner plate 11 is matched with that of the outer wall of the nuclear pipeline. The shape of the outer panel 12 may be the same as or different from the shape of the inner panel 11.
Further, as shown in fig. 2, for improving the utility model provides a heat preservation device's structural strength and extension its life, the inner panel 11 the planking 12 and two axial baffle 13, two all through the fixed welding of L type connecting plate 16 between the radial baffle 14.
In fig. 2, it is shown that a plurality of toothed support plates 15 are uniformly distributed on the inner surface of the inner plate 11 in the axial direction, and the distribution number of the toothed support plates depends on the design length of the heat preservation device. The tooth-shaped supporting plate 15 is vertically supported between the inner plate 11 and the outer wall of the nuclear pipeline, so that a heat insulation gap is reserved between the heat preservation block and the nuclear pipeline, and the rapid heat conduction caused by the direct contact of the heat preservation block and the nuclear pipeline is avoided. Meanwhile, the contact area between the inner plate 11 and the nuclear pipeline is reduced, the surface contact between the inner plate and the nuclear pipeline is changed into point contact, and the heat conduction efficiency is effectively reduced.
The specific structure of the tooth-shaped support plate 15 is shown in fig. 3, and further, in order to ensure the support stability of the tooth-shaped support plate, the tooth-shaped support plate 15 is fixedly welded on the inner surface of the inner plate 11 along the circumferential direction.
The shape of the space formed by the inner plate 11, the outer plate 12, the two axial baffles 13 and the two radial baffles 14 is matched with the shape of the metal reflection type heat preservation structure 20, that is, the internal space of the heat preservation block 10 is completely filled with the metal reflection type heat preservation structure 20, and the metal reflection type heat preservation structure 20 can effectively reduce the heat conduction of the nuclear pipeline to the external environment.
As shown in FIG. 4, the metal reflective insulation structure 20 comprises a plurality of metal foils 21 arranged in parallel, wherein the metal foils mainly play a role in reflecting heat and limiting heat convection and heat conduction, and further, the metal foils 21 have a surface roughness Ra of less than or equal to 0.05 μm and a normal emissivity of less than or equal to 0.23 μm.
In fig. 4, each layer of the metal foils 21 has a concave-convex structure 22, and the concave-convex structures 22 of two adjacent layers of the metal foils are arranged in a staggered manner, so that a heat insulation gap is generated between each layer of the metal foils, thereby isolating heat transfer between each layer of the metal foils. In addition, the concave-convex structure 22 on each layer of the metal foil can effectively reduce the length of a heat bridge, thereby reducing heat conduction and heat convection and further improving the heat insulation effect of the heat insulation block.
The concave-convex structure 22 on the metal foil can be formed by stamping, and it should be noted that concave-convex structures formed or constituted by other methods also belong to the protection scope of the present invention.
Further, the metal foil 21 is gold foil, silver foil, titanium alloy foil, or stainless steel foil. In view of economic cost, stainless steel foil is preferred in embodiments of the present invention.
Above-mentioned metal reflection-type insulation construction 20 fills up the inner space of insulating block 10, not only can keep apart the heat transfer between each layer foil, still can seal up the heat energy of nuclear pipeline transmission in each in the insulating block 10, in addition, the utility model provides an insulation apparatus comprises two insulating blocks 10 in opposite directions the concatenation, because of the heat-conduction that the concatenation contact causes also only between two insulating blocks 10 (in the insulation apparatus promptly), has effectively reduced the heat from the conduction of the outside environment of insulation apparatus, and the heat preservation effect is good.
The utility model provides a heat preservation device for nuclear pipeline grips the heat insulating block for the operating personnel when dismouting or removal, as shown in figure 1, still be provided with at least one handle 40 on the surface of planking 12. Furthermore, the handle 40 is a spring type handle tightly attached to the outer surface of the outer plate 12, so that the external space of the heat preservation device is saved, and compared with an outward convex handle, the tightly attached handle is not easy to cause accidental injury to operators and has good safety.
Further, as shown in fig. 2, in order to facilitate quick splicing and installation, a plurality of snap locks 30 are disposed at positions corresponding to the splicing of the two heat-insulating blocks 10, the snap locks 30 are fixedly disposed on the outer surface of the outer plate 12, the snap locks 30 include a snap 31 and a snap hook 32 which are mutually overlapped and locked, the snap 31 is fixedly riveted on the outer plate of one heat-insulating block, the snap hook 32 is fixedly riveted on the outer plate of the other heat-insulating block, and the positions of the snap 31 and the snap hook 32 correspond to each other. When the splicing fixture is used, two heat preservation blocks to be spliced are aligned, the agraffe 31 is sleeved on the agraffe 32, and the agraffe 31 is pulled to be lapped and locked, so that the two heat preservation blocks 10 are fixedly spliced.
Example one
The first embodiment provides a heat preservation device for a nuclear elbow pipeline, which comprises two heat preservation blocks 10, wherein the two heat preservation blocks are in one-to-one correspondence in shape and size and are oppositely spliced to coat the outer wall of the nuclear elbow pipeline; each heat preservation block 10 comprises an inner plate 11, an outer plate 12, and two axial baffles and two radial baffles 14 which are fixedly packaged between the inner plate 11 and the outer plate 12, wherein the inner plate 11 and the outer plate 12 are matched with the outer wall of the nuclear pipeline in shape. As shown in fig. 2, 2 tooth-shaped support plates 15 are uniformly distributed on the inner surface of the inner plate 11 along the axial direction, and the tooth-shaped support plates 15 are arranged between the inner plate 11 and the outer wall of the nuclear pipeline in a propping manner; the inner plate 11, the outer plate 12, the two axial baffles and the two radial baffles 14 are all made of stainless steel plates, and are fixedly welded into a whole through stainless steel L-shaped connecting plates. In addition, the stainless steel foil is also selected for use in the metal reflection-type heat preservation structure filled in the internal space of the heat preservation block 10, so that the heat preservation device for the nuclear elbow pipeline provided by the embodiment has the advantages of high strength, long service life, low manufacturing cost, good heat preservation effect, good practicability and wide industrial application prospect.
Example two
The second embodiment provides a heat preservation device for a nuclear straight pipeline, which comprises three heat preservation blocks 10 which are in one-to-one correspondence in shape and size and are spliced and coated on the outer wall of the nuclear straight pipeline, as shown in fig. 8-9. Each heat-insulating block 10 comprises an inner plate 11, an outer plate 12, two axial baffles and two radial baffles 14, wherein the two axial baffles and the two radial baffles are fixedly packaged between the inner plate 11 and the outer plate 12, the inner plate 11 and the outer plate 12 are matched with the outer wall of the nuclear pipeline in shape, and the heat-insulating block 10 is a cylindrical barrel. A plurality of tooth-shaped supporting plates 15 are uniformly distributed on the inner surface of the inner plate 11 along the axial direction, and the tooth-shaped supporting plates 15 are supported between the inner plate 11 and the outer wall of the nuclear pipeline; the inner plate 11, the outer plate 12, the two axial baffles and the two radial baffles 14 are all made of stainless steel plates, and are fixedly welded into a whole through stainless steel L-shaped connecting plates. In addition, the internal space of the heat preservation block 10 is filled with a metal reflection type heat preservation structure, and a titanium alloy foil with a high reflectivity is selected as a metal foil in the metal reflection type heat preservation structure, so that the heat preservation device for the nuclear pipeline provided by the embodiment has the advantages of high strength, long service life and better heat preservation effect.
To sum up, in the heat preservation device for the nuclear pipeline, the heat preservation blocks are coated on the outer wall of the nuclear pipeline in a splicing mode, the structure is compact, the efficiency of disassembly, assembly and replacement is improved due to the arrangement of the handle and the hasp lock, and the operation is convenient and fast; the heat insulation block structure is made of radiation-resistant metal plates, the strength is high, the service life is long, and the metal reflection type heat insulation structure is filled in the heat insulation block, so that the heat conduction of the nuclear pipeline to the external environment can be effectively reduced, and the heat insulation effect is good; furthermore, the utility model provides a heat preservation device for nuclear pipeline both had been applicable to nuclear elbow pipeline, had been applicable to nuclear straight pipeline again, and application scope is wide, and the practicality is good, has extensive industrial application prospect.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. The present embodiments are therefore to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned. In the claims, the word "comprising" does not exclude the presence of data or steps not listed in a claim.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a heat preservation device for nuclear pipeline which characterized in that: comprises at least two heat insulation blocks (10) which are in one-to-one correspondence in shape and size and are spliced to be coated on the outer wall of the nuclear pipeline; each heat-insulating block (10) comprises an inner plate (11), an outer plate (12), and a two-axial baffle (13) and two radial baffles (14) which are fixedly packaged between the inner plate (11) and the outer plate (12), wherein a plurality of tooth-shaped supporting plates (15) are uniformly distributed on the inner surface of the inner plate along the axial direction, and the tooth-shaped supporting plates (15) are supported and arranged between the inner plate (11) and the outer wall of the nuclear pipeline; and a metal reflection type heat insulation structure (20) capable of reducing heat conduction is filled between the inner plate (11), the outer plate (12), the two axial baffles (13) and the two radial baffles (14).
2. The thermal insulation device for nuclear pipelines according to claim 1, wherein: the metal reflection type heat preservation structure (20) comprises a plurality of layers of metal foils (21) which are arranged in parallel, each metal foil (21) is provided with a concave-convex structure (22), and the concave-convex structures (22) of two adjacent metal foils are arranged in a staggered mode.
3. The thermal insulation device for a nuclear pipeline according to claim 2, characterized in that: the surface roughness Ra of the metal foil (21) is less than or equal to 0.05 mu m, and the normal emissivity is less than or equal to 0.23 mu m.
4. The thermal insulation device for a nuclear pipeline according to claim 2, characterized in that: the metal foil (21) is gold foil, silver foil, titanium alloy foil or stainless steel foil.
5. The thermal insulation device for nuclear pipelines according to claim 1, wherein: the shape of the inner plate (11) is matched with the shape of the outer wall of the nuclear pipeline.
6. The thermal insulation device for nuclear pipelines according to claim 1, wherein: the tooth-shaped supporting plate (15) is fixedly welded on the inner surface of the inner plate (11) along the circumferential direction.
7. The thermal insulation device for nuclear pipelines according to claim 1, wherein: the two heat-insulating blocks (10) are provided with a plurality of hasp locks (30) for lap joint locking at the corresponding positions of mutual splicing.
8. The thermal insulation device for nuclear pipelines according to claim 1, wherein: the outer plate (12) is also provided with at least one handle (40) which is convenient to hold.
9. The thermal insulation device for nuclear pipelines according to claim 8, wherein: the handle (40) is a spring type handle tightly attached to the outer surface of the outer plate (12).
10. The thermal insulation device for nuclear pipelines according to claim 1, wherein: the inner plate (11), the outer plate (12), the two axial baffles (13) and the two radial baffles (14) are fixedly welded through L-shaped connecting plates (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021695114.XU CN212455977U (en) | 2020-08-14 | 2020-08-14 | Heat preservation device for nuclear pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021695114.XU CN212455977U (en) | 2020-08-14 | 2020-08-14 | Heat preservation device for nuclear pipeline |
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| CN212455977U true CN212455977U (en) | 2021-02-02 |
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| CN202021695114.XU Active CN212455977U (en) | 2020-08-14 | 2020-08-14 | Heat preservation device for nuclear pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236909A (en) * | 2021-06-15 | 2021-08-10 | 江苏金环科技有限公司 | Large-scale jar of body metal insulation system |
| CN115143345A (en) * | 2022-05-13 | 2022-10-04 | 安徽工业大学 | Nuclear power station loop pipeline detachable heat-preservation shielding integrated device and using method |
-
2020
- 2020-08-14 CN CN202021695114.XU patent/CN212455977U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236909A (en) * | 2021-06-15 | 2021-08-10 | 江苏金环科技有限公司 | Large-scale jar of body metal insulation system |
| CN115143345A (en) * | 2022-05-13 | 2022-10-04 | 安徽工业大学 | Nuclear power station loop pipeline detachable heat-preservation shielding integrated device and using method |
| CN115143345B (en) * | 2022-05-13 | 2024-02-06 | 安徽工业大学 | Nuclear power station primary loop pipeline detachable heat preservation and shielding integrated device and use method |
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