Pipeline heat preservation structure and pipeline assembly
By applying a reflective layer consisting of microspheres and a substrate layer to the outer circumference of high-temperature pipelines in nuclear power plants, the low thermal conductivity and high reflectivity of the microspheres are utilized to reflect thermal radiation, thus solving the problem of thermal energy radiation in high-temperature pipelines of nuclear power plants and improving thermal insulation performance and enhancing safety.
Patent Information
- Application Number
- CN202422996032.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-05
AI Technical Summary
The high-temperature pipelines of nuclear power plants radiate heat outwards significantly, affecting the economic efficiency and safety of the nuclear power plants.
A reflective layer consisting of a microsphere layer and a matrix layer is adopted. By applying the reflective layer to the outer circumference of the pipe, the low thermal conductivity and high reflectivity of the microspheres are used to reflect heat radiation to reduce heat loss. Combined with a heat-insulating layer, a neutron shielding layer and an anti-corrosion layer, the insulation effect is improved.
It effectively reduces the heat radiation from high-temperature pipelines in nuclear power plants, improves insulation performance, and enhances the pipeline's thermal insulation capacity and safety.
Smart Images
Figure CN223550112U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipelines, and in particular to a pipeline insulation structure and pipeline assembly. Background Technology
[0002] The high-temperature piping in the primary loop of a nuclear power plant is a crucial component of the plant's operation. This piping operates under conditions of high temperature, high pressure, and strong radiation. When the piping is at high temperatures, the heat diffuses into the surrounding environment, resulting in extremely high resource requirements for the nuclear power plant, severely impacting its economic viability and safety.
[0003] Therefore, it is necessary to reduce the outward radiation of heat from the high-temperature pipes of existing nuclear power plants. Summary of the Invention
[0004] This utility model provides a pipe insulation structure and pipe assembly to reduce the outward radiation of heat energy from high-temperature pipes in existing nuclear power plants.
[0005] This utility model provides a pipe insulation structure, including a reflective layer. The reflective layer is adapted to be sleeved on the outer peripheral surface of the pipe. The reflective layer includes a microsphere layer and a substrate layer located outside the microsphere layer. The inner wall surface of the substrate layer is attached to the outer peripheral surface of the microsphere layer. The microsphere layer includes an adhesive layer and a plurality of microspheres, with the plurality of microspheres disposed in the adhesive layer.
[0006] Optionally, the substrate layer is a metal foil layer, and the inner wall surface of the substrate layer is a rough surface.
[0007] Optionally, the reflective layer further includes a transparent polytetrafluoroethylene (PTFE) layer, the inner wall surface of which is adapted to adhere to the outer circumferential surface of the pipe, and the outer circumferential surface of which is attached to the inner wall surface of the microsphere layer.
[0008] Optionally, the microspheres are one or more of solid glass microspheres, solid ceramic microspheres, hollow glass microspheres, and hollow ceramic microspheres.
[0009] Optionally, the pipe insulation structure further includes a heat-insulating layer, a neutron shielding layer, and an anti-corrosion layer arranged sequentially from the inside to the outside, with the inner wall surface of the heat-insulating layer attached to the outer peripheral surface of the substrate layer.
[0010] Optionally, a protective sleeve may also be provided on the outer wall of the anti-corrosion layer. The protective sleeve has a first side and a second side that are disposed opposite to and adjacent to each other in the circumferential direction of the anti-corrosion layer. The first side and the second side are connected by a zipper so that the protective sleeve is disposed outside the anti-corrosion layer. The zipper is provided on the outer wall of the protective sleeve.
[0011] Optionally, it also includes a first connector, a second connector, and a protective sleeve disposed on the outer wall of the anti-corrosion layer. The protective sleeve has a first side and a second side that are disposed opposite to and adjacent to each other in the circumferential direction of the anti-corrosion layer. The first connector and the second connector are both disposed on the outer wall of the protective sleeve. The first connector is close to the first side, and the second connector is close to the second side. The first connector is detachably connected to the second connector.
[0012] When the protective sleeve is fitted outside the anti-corrosion layer, the first connector can be connected to the second connector to maintain the protective sleeve fitted outside the anti-corrosion layer; after the first connector and the second connector are detached, the first side and the second side can move away from each other under the action of external force.
[0013] Optionally, it also includes an extension edge, which is integrally formed with the first side edge. When the protective sleeve is applied to the outside of the anti-corrosion layer, the inner wall of the extension edge fits against the outer wall of the second side edge.
[0014] Optionally, the protective cover is elastic and is made of silicone cloth or fiberglass cloth.
[0015] On the other hand, this utility model embodiment also provides a pipe assembly, including a pipe and the above-mentioned pipe insulation structure.
[0016] The pipe insulation structure provided in this embodiment of the utility model has a low thermal conductivity of microspheres, which gives it good heat insulation ability and makes it a good heat insulation material. In addition, the microspheres are used to reflect heat radiation in this embodiment, thereby enhancing the heat insulation effect. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is an overall schematic diagram of the pipe insulation structure in one embodiment of the present utility model;
[0019] Figure 2 This is an overall schematic diagram of the pipe insulation structure in one embodiment of the present utility model;
[0020] Figure 3 This is an overall schematic diagram of the pipe insulation structure in one embodiment of the present invention.
[0021] Figure descriptions: 100, Pipe; 1, Polytetrafluoroethylene layer; 2, Microbead layer; 3, Substrate layer; 4, Heat-insulating layer; 5, Neutron shielding layer; 6, Anti-corrosion layer; 7, Protective sleeve; 71, First connector; 72, Second connector; 73, Extension edge; 74, Zipper; 75, First side edge; 76, Second side edge. Detailed Implementation
[0022] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0023] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Reference Figure 1 and Figure 2 This utility model provides a pipe insulation structure, including a reflective layer sleeved on the outer wall of a pipe 100. The reflective layer is used on the outer peripheral surface of the pipe. The reflective layer includes a microsphere layer 2 and a substrate layer 3. The microsphere layer 2 is disposed on the substrate layer 3. The substrate layer 3 is located outside the microsphere layer 2. The inner wall surface of the substrate layer 3 is attached to the outer peripheral surface of the microsphere layer 2. The microsphere layer 2 includes an adhesive layer and a plurality of microspheres, and the plurality of microspheres are disposed in the adhesive layer.
[0026] The low thermal conductivity of microspheres gives them good thermal insulation capabilities, making them a good thermal insulation material. In addition, microspheres have high reflectivity, which can reflect radiated heat back, reducing heat loss and improving the thermal insulation effect of pipes.
[0027] In one embodiment, the microsphere layer includes a high-temperature resistant water-based resin, glass microspheres, a film-forming aid, and a filler. The above components are added to deionized water in a certain mass ratio and stirred evenly to obtain the microsphere layer solution. The microsphere layer solution is then coated onto a substrate layer and cured to obtain the reflective layer.
[0028] The microsphere layer is mainly composed of high-temperature resistant water-based resin, glass microspheres, film-forming aids, and fillers. First, the high-temperature resistant water-based resin, glass microspheres, film-forming aids, and fillers are accurately weighed according to a specific mass ratio. Then, these weighed components are added one by one to an appropriate amount of deionized water. During the addition process, appropriate stirring equipment is used to stir at a certain speed to ensure that each component is uniformly dispersed in the deionized water, thereby obtaining the microsphere layer solution.
[0029] Next, prepare the substrate layer 3. Apply the prepared microsphere solution evenly to the surface of the substrate layer 3. The application method can be selected according to actual needs and process conditions, such as spraying, brushing, or scraping. After application, place it under suitable curing conditions for curing. Curing conditions include specific parameters such as temperature, humidity, and curing time. These parameters should be determined based on the composition characteristics of the microsphere solution and the material properties of the substrate layer. After the curing process, the reflective layer is obtained.
[0030] In one embodiment, a certain mass of glass microspheres is first added to an inorganic adhesive and stirred until homogeneous to obtain a mixed solution. This mixed solution is then coated onto the surface of the substrate layer 3 and dried to obtain the reflective layer. The inorganic adhesive can be one or more of the following: silicates, phosphates, oxides, sulfates, and borates.
[0031] As an example, the substrate layer 3 is a metal foil layer, which can also reflect heat radiation again, thereby enhancing the heat preservation effect. In this embodiment, the metal foil layer is provided in multiple layers, or the metal foil layer is thickened.
[0032] As an example, the surface of the substrate layer 3 near the microsphere layer 2 is rough. The rough surface of the substrate layer 3 can enhance the adhesion between the microsphere layer 2 and the substrate layer 3, thereby increasing the connection strength between the two.
[0033] As an example, the microspheres are one or more of solid glass microspheres, solid ceramic microspheres, hollow glass microspheres, and hollow ceramic microspheres.
[0034] In this embodiment, hollow glass microspheres are preferred. Hollow glass microspheres are low in cost and have a lower thermal conductivity than solid glass microspheres.
[0035] Reference Figure 1 As an example, the pipe insulation layer structure further includes a heat-insulating layer 4, a neutron shielding layer 5, and an anti-corrosion layer 6, which are sequentially disposed from the inside to the outside of the base layer 3. In this embodiment, the neutron shielding layer 5 can be polyethylene, the heat-insulating layer 4 can be glass fiber, and the anti-corrosion layer 6 can include epoxy phenolic plastic, polyphenylene sulfide, fluoropolymer, or polyimide.
[0036] Reference Figure 2 As an example, the pipe insulation layer structure also includes a first connector 71, a second connector 72, and a protective sleeve 7 disposed on the outer wall of the anti-corrosion layer. The protective sleeve 7 has a first side and a second side that are disposed opposite to and adjacent to each other in the circumferential direction of the anti-corrosion layer. The first connector 71 and the second connector 72 are both disposed on the outer wall of the protective sleeve 7. The first connector 71 is close to the first side, and the second connector 72 is close to the second side. The first connector 71 is detachably connected to the second connector 72.
[0037] When the protective sleeve 7 is disposed outside the anti-corrosion layer, the first connector 71 can be connected to the second connector 72 to maintain the protective sleeve 7 on the outside of the anti-corrosion layer; after the first connector 71 and the second connector 72 are disengaged, the first side and the second side can move away from each other under the action of external force.
[0038] In this embodiment, the first connector 71 includes a strip and a male hook-and-loop fastener. One end of the strip is fixed to the outer wall of the protective sleeve 7, and the male hook-and-loop fastener is fixed to the other end of the strip. The second connector 72 is a female hook-and-loop fastener. Multiple second connectors 72 can be provided, with the multiple hook-and-loop fasteners spaced apart circumferentially around the protective sleeve 7. When the first side and the second side abut against each other to form a cylindrical shape, the male hook-and-loop fastener on the strip and the second connector 72 are fastened together, so that the protective sleeve 7 is stably fitted over the anti-corrosion layer. When it is necessary to remove the protective sleeve 7, it is only necessary to break the fastening connection between the first connector 71 and the second connector 72.
[0039] As an example, the pipe insulation structure also includes an extension edge 73, which is integrally formed with the first side edge. When the protective sleeve 7 is disposed outside the anti-corrosion layer, the inner wall of the extension edge 73 fits against the outer wall of the second side edge. In this embodiment, to improve the protective effect, the first side edge is further extended along the circumference of the protective sleeve 7 to form the extension edge 73. The extension edge 73 is stacked outside the second side edge, thereby enhancing the protective effect.
[0040] As an example, the protective cover 7 is elastic and is made of silicone cloth or fiberglass cloth.
[0041] In one embodiment, a polytetrafluoroethylene (PTFE) layer 1 is further disposed on the inner wall of the microsphere layer 2. The PTFE layer 1 is transparent, and its outer peripheral surface is attached to the inner wall surface of the microsphere layer. A reflective layer is disposed on the outside of the PTFE layer, which can further reflect the heat transmitted through the PTFE layer 1, thereby improving the heat insulation effect of the pipe 100. Since the PTFE layer has low thermal conductivity, it can play a good heat insulation role. The reflective layer, such as the microsphere layer or the metal foil layer, is disposed on its outside to reflect the radiated heat back, further reducing heat loss and improving the heat insulation effect of the pipe.
[0042] Reference Figure 3 In one embodiment, the insulation structure of the pipeline further includes a protective sleeve 7 disposed on the outer wall of the anti-corrosion layer. The protective sleeve 7 has a first side and a second side disposed opposite to and adjacent to each other in the circumferential direction of the anti-corrosion layer. The first side and the second side are connected by a zipper 74 so that the protective sleeve 7 is disposed outside the anti-corrosion layer. The zipper 74 is disposed on the outer wall of the protective sleeve 7.
[0043] In one embodiment, the present invention also discloses a pipe assembly, including a pipe and the pipe insulation structure described in the above embodiments.
[0044] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. A pipe insulation structure, characterized in that, The device includes a reflective layer adapted to be fitted onto the outer circumferential surface of a pipe. The reflective layer includes a microsphere layer and a substrate layer located outside the microsphere layer. The inner wall surface of the substrate layer is attached to the outer circumferential surface of the microsphere layer. The microsphere layer includes an adhesive layer and a plurality of microspheres, with the plurality of microspheres disposed in the adhesive layer. The pipeline insulation structure also includes a heat-insulating layer, a neutron shielding layer and an anti-corrosion layer arranged sequentially from the inside to the outside, with the inner wall surface of the heat-insulating layer attached to the outer peripheral surface of the substrate layer.
2. The pipe insulation structure according to claim 1, characterized in that, The substrate layer is a metal foil layer, and the inner wall surface of the substrate layer is a rough surface.
3. The pipe insulation structure according to claim 1, characterized in that, The reflective layer also includes a transparent polytetrafluoroethylene (PTFE) layer, the inner wall surface of which is adapted to be attached to the outer circumferential surface of the pipe, and the outer circumferential surface of which is attached to the inner wall surface of the microsphere layer.
4. The pipe insulation structure according to claim 1, characterized in that, The microspheres are one or more of solid glass microspheres, solid ceramic microspheres, hollow glass microspheres, and hollow ceramic microspheres.
5. The pipe insulation structure according to claim 1, characterized in that, It also includes a protective sleeve disposed on the outer wall of the anti-corrosion layer. The protective sleeve has a first side and a second side that are disposed opposite to and adjacent to each other in the circumferential direction of the anti-corrosion layer. The first side and the second side are connected by a zipper so that the protective sleeve is disposed outside the anti-corrosion layer. The zipper is disposed on the outer wall of the protective sleeve.
6. The pipe insulation structure according to claim 1, characterized in that, It also includes a first connector, a second connector, and a protective sleeve disposed on the outer wall of the anti-corrosion layer. The protective sleeve has a first side and a second side that are disposed opposite to and adjacent to each other in the circumferential direction of the anti-corrosion layer. The first connector and the second connector are both disposed on the outer wall of the protective sleeve. The first connector is close to the first side, and the second connector is close to the second side. The first connector is detachably connected to the second connector. When the protective sleeve is fitted outside the anti-corrosion layer, the first connector can be connected to the second connector to maintain the protective sleeve fitted outside the anti-corrosion layer; after the first connector and the second connector are detached, the first side and the second side can move away from each other under the action of external force.
7. The pipe insulation structure according to claim 6, characterized in that, It also includes an extension edge, which is integrally formed with the first side edge. When the protective sleeve is applied to the outside of the anti-corrosion layer, the inner wall of the extension edge fits against the outer wall of the second side edge.
8. The pipe insulation structure according to any one of claims 5 to 7, characterized in that, The protective cover is elastic and is made of silicone cloth or fiberglass cloth.
9. A pipe assembly, characterized in that, Includes pipes and the pipe insulation structure as described in any one of claims 1-8.