Thermal compensation heat insulation support for supporting high-temperature molten salt conveying pipeline

Abstract

The utility model belongs to the technical field of high-temperature pipeline heat preservation supports, particularly relates to a thermal compensation heat insulation support for supporting a high-temperature fused salt conveying pipeline, solves the technical problems that an existing heat insulation support is poor in heat preservation effect and time-consuming and labor-consuming in installation, and comprises an upper heat preservation assembly, a lower heat preservation assembly and a supporting base. Each of the upper heat preservation assembly and the lower heat preservation assembly comprises a transparent semicircular cylinder, a black heat absorption semicircular cylinder, a specular reflection semicircular cylinder and an internal supporting semicircular cylinder which are coaxially sleeved, the space between the transparent semicircular cylinder and the black heat absorption semicircular cylinder is filled with silicon dioxide aerogel, and the space between the specular reflection semicircular cylinder and the internal supporting semicircular cylinder is filled with aerogel; the reflecting surface of the specular reflection semicircular cylinder faces the internal supporting semicircular cylinder, and the outer circular surface of the black heat absorption semicircular cylinder is coated with black paint; the upper heat preservation assembly is fixedly connected with the lower connecting plate of the lower heat preservation assembly in an aligned mode through the upper connecting plate. The supporting base is supported between the lower heat preservation assembly and the ground.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature pipeline insulation supports, in particular to a heat-compensating insulation support for supporting high-temperature molten salt transportation pipelines. Background Art

[0002] Molten salt thermal storage technology is a medium-to-high-temperature energy storage method characterized by high heat storage density, low vapor pressure, and a wide operating temperature range. It utilizes nitrates (such as binary and ternary salts) as a thermal storage medium. Green electricity, off-peak electricity, and waste heat heat the molten salt to store renewable energy, off-peak electricity, or waste heat. This enhances the deep peak-shaving capabilities of thermal power units, promotes the integration of new energy, and improves grid security. Currently, long-duration molten salt thermal storage technology is widely used in a variety of fields, including solar thermal power plants, integrated wind, solar, heat, and storage energy bases, flexibility upgrades for thermal power units, and steam supply for industrial parks.

[0003] Typically, the solidification temperatures of binary salts (40%wtKNO3~60%wtNaNO3) and ternary salts (53%wtKNO3+40%wtKNO2+7%wtNaNO3) commonly used in the high-temperature molten salt thermal storage industry are 220°C and 142°C, respectively. This results in relatively high operating temperatures (200-565°C) for molten salt energy storage systems. To avoid significant heat loss from poorly insulated high-temperature pipelines during molten salt transport, which can lead to poor flow properties or freezing, it is crucial to utilize pipeline transportation technology with excellent insulation and low heat loss.

[0004] It is worth noting that in actual projects, a large number of pipe supports with poor thermal insulation performance have been widely used in molten salt pipeline transportation systems with large diameters, long distances, and large spans (such as tower and trough solar thermal power plants). This results in large heat losses, low thermal efficiency, and time-consuming and labor-intensive installation. Therefore, it is necessary to develop insulating supports with better thermal insulation performance and the ability to use natural sunlight for thermal compensation. This can reduce heat loss of the molten salt medium during pipeline transportation and thereby improve the thermal efficiency of energy storage system operation. Utility Model Content

[0005] In order to overcome the technical defects of existing thermal insulation supports, such as poor thermal insulation effect and time-consuming and labor-intensive installation, the utility model provides a thermal compensation thermal insulation support for supporting high-temperature molten salt transmission pipelines.

[0006] The utility model provides a thermal compensation insulation support for supporting a high-temperature molten salt delivery pipeline, comprising an upper insulation component, a lower insulation component and a support base, wherein the upper insulation component comprises an upper transparent semi-cylinder, an upper black heat-absorbing semi-cylinder, an upper mirror-reflecting semi-cylinder and an upper internal support semi-cylinder which are coaxially mounted from the outside to the inside, a silica aerogel with a light transmittance of 90% is filled between the upper transparent semi-cylinder and the upper black heat-absorbing semi-cylinder, an aerogel with an infrared light absorption rate greater than 80% is filled between the upper mirror-reflecting semi-cylinder and the upper internal support semi-cylinder; the upper transparent semi-cylinder and the upper black heat-absorbing semi-cylinder are coaxially mounted on the upper heat-absorbing semi-cylinder, wherein the upper mirror-reflecting semi-cylinder and the upper internal support semi-cylinder are coaxially mounted on the upper heat-absorbing semi-cylinder, wherein ... The left side wall section and the right side wall section of the cylinder, the upper black heat-absorbing semi-cylinder, the upper mirror-reflecting semi-cylinder and the upper internal support semi-cylinder are respectively connected into a whole through the upper connecting plate, and the axial ends of the upper thermal insulation component are sealed and connected by sealing plates. The reflecting surface of the upper mirror-reflecting semi-cylinder faces the upper internal support semi-cylinder, and the outer circumferential surface of the upper black heat-absorbing semi-cylinder is coated with black paint; the lower thermal insulation component includes a lower transparent semi-cylinder, a lower black heat-absorbing semi-cylinder, a lower mirror-reflecting semi-cylinder and a lower internal support semi-cylinder which are coaxially mounted from outside to inside. The lower transparent semi-cylinder and the lower black heat-absorbing semi-cylinder are coaxially mounted on the lower mirror-reflecting semi-cylinder and the lower internal support semi-cylinder. The semi-cylinders are filled with silica aerogel with a light transmittance of 90%, and the space between the lower mirror-reflecting semi-cylinder and the lower internal supporting semi-cylinder is filled with aerogel with an infrared light absorption rate greater than 80%; the left and right cylinder wall sections of the lower transparent semi-cylinder, the lower black heat-absorbing semi-cylinder, the lower mirror-reflecting semi-cylinder and the lower internal supporting semi-cylinder are respectively connected into a whole through the lower connecting plate, and the axial ends of the lower thermal insulation component are sealed and connected by sealing plates. The reflecting surface of the lower mirror-reflecting semi-cylinder faces the lower internal supporting semi-cylinder, and the outer circumference of the upper black heat-absorbing semi-cylinder is coated with black coating. Material; the upper transparent semi-cylinder, the upper black heat-absorbing semi-cylinder, the upper mirror-reflecting semi-cylinder and the upper internal supporting semi-cylinder are symmetrically arranged with the lower transparent semi-cylinder, the lower black heat-absorbing semi-cylinder, the lower mirror-reflecting semi-cylinder and the lower internal supporting semi-cylinder respectively; after the upper insulation component is aligned and fixedly connected with the lower connecting plate of the lower insulation component through the upper connecting plate, the upper internal supporting semi-cylinder and the lower internal supporting semi-cylinder form a supporting cylinder for passing the high-temperature molten salt conveying pipeline; the support base is supported between the lower insulation component and the ground, and the top of the support base is adapted to the outer circular surface of the lower insulation component.

[0007] The aerogel with an infrared light absorption rate greater than 80% and the upper mirror-reflecting semi-cylinder or the lower mirror-reflecting semi-cylinder form an infrared thermal radiation reflection layer. For the fluid medium in the high-temperature molten salt conveying pipeline, its temperature is generally greater than 500°C, and the wavelength of the generated thermal radiation is distributed in the infrared region and the visible light region. After the upper internal support semi-cylinder or the lower internal support semi-cylinder absorbs the heat of the high-temperature molten salt conveying pipeline and heats up, the aerogel with an infrared light absorption rate greater than 80% can effectively reduce the heat loss caused by heat conduction. At the same time, the aerogel with an infrared light absorption rate greater than 80% will absorb part of the thermal radiation, and the other part of the thermal radiation will be reflected by the upper mirror-reflecting semi-cylinder or the lower mirror-reflecting semi-cylinder and then absorbed again by the upper internal support semi-cylinder or the lower internal support semi-cylinder.

[0008] The silica aerogel with a light transmittance of 90% and the upper black heat-absorbing semi-cylinder or the lower black heat-absorbing semi-cylinder form a photothermal compensation insulation layer. During the day when there is sufficient solar energy, the upper black heat-absorbing semi-cylinder or the lower black heat-absorbing semi-cylinder can absorb a large amount of solar energy to increase the temperature. At the same time, the outer layer of silica aerogel with a light transmittance of 90% can fully reduce heat loss.

[0009] The upper transparent semi-cylinder and the lower transparent semi-cylinder are designed to allow external sunlight to pass through.

[0010] Preferably, at least two first reinforcing ribs are vertically supported between the lower transparent semi-cylinder and the lower black heat-absorbing semi-cylinder. At least two second reinforcing ribs are radially supported between the lower specular reflective semi-cylinder and the lower internal support semi-cylinder. The lengths of the first and second reinforcing ribs are parallel to the axial direction of the high-temperature molten salt delivery pipeline. The first and second reinforcing ribs are provided to enhance the overall structural strength of the thermal insulation support. The steel plate supports the overall mass of the pipeline, preventing deformation of the insulation layer under the influence of gravity.

[0011] Preferably, the upper and lower connecting plates are provided with multiple sets of intermeshing strip-shaped protrusions and strip-shaped grooves arranged axially along the high-temperature molten salt delivery pipe. The strip-shaped protrusions and strip-shaped grooves are butted together to prevent radial movement of the upper and lower connecting plates, thereby ensuring a secure connection between the upper and lower insulation assemblies.

[0012] Preferably, the upper and lower connecting plates are fixedly connected by multiple sets of bolt and nut assemblies, and lubricating oil is applied between the upper and lower connecting plates to ensure airtightness of the contact surface. The provision of lubricating oil can improve the overall airtightness of the upper and lower insulation components and minimize internal heat loss.

[0013] Preferably, a curved reflector with a central angle of 30° is laid on the inner wall of the lower transparent semi-cylinder, and the mirror surface of the curved reflector faces the outer cylindrical surface of the lower black heat-absorbing semi-cylinder. The curved reflector is laid on the inner wall of the lower transparent semi-cylinder to prevent only the upper black heat-absorbing semi-cylinder in the upper insulation assembly from absorbing solar radiation, resulting in low energy utilization. The curvature of the curved reflector is the same as that of the lower transparent semi-cylinder, and the central angle of the curved reflector is 30°. This is to fully reflect and concentrate sunlight, ensure that the bottom of the lower black heat-absorbing semi-cylinder can receive sufficient solar heat, and ensure that the overall temperature of the thermal compensation insulation support is uniform. The central angle of the curved reflector, that is, the placement position, can be appropriately adjusted according to the specific area of ​​use and sunlight.

[0014] Preferably, the upper transparent semi-cylinder and the lower transparent semi-cylinder are made of tempered glass; the upper mirror-reflecting semi-cylinder and the lower mirror-reflecting semi-cylinder are made of a silver-plated secondary surface mirror of a polytetrafluoroethylene propylene film.

[0015] Preferably, the support base is formed by pouring cement.

[0016] Compared with the prior art, the technical solution provided by the present invention has the following technical effects: a simple overall structure, low production cost, and good thermal insulation effect. The thermal compensation insulation support described in the present invention is provided with an infrared thermal radiation reflection layer and a photothermal compensation insulation layer. The aerogel with an infrared light absorption rate greater than 80% can effectively reduce heat loss caused by heat conduction. At the same time, the aerogel with an infrared light absorption rate greater than 80% will absorb a portion of the thermal radiation, and the other portion of the thermal radiation will be reflected by the upper mirror-reflecting semi-cylinder or the lower mirror-reflecting semi-cylinder and then re-absorbed by the upper internal support semi-cylinder or the lower internal support semi-cylinder. During the daytime when solar energy is sufficient, the upper black heat-absorbing semi-cylinder or the lower black heat-absorbing semi-cylinder can absorb a large amount of solar energy to increase the temperature. At the same time, the silica aerogel with a light transmittance of 90% in the outer layer can fully reduce heat loss. The thermal compensation insulation support described in the present invention can not only support the high-temperature pipeline, but also fully utilize the energy supplement of the external natural heat source to reduce the heat loss of the high-temperature pipeline, meet the insulation requirements, and provide a technical basis for ensuring the smooth operation of the overall heat storage link. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a cross-sectional view of a heat-compensating insulation support for supporting a high-temperature molten salt transportation pipeline described in an embodiment of the present invention;

[0020] Figure 2 This is an overall diagram of a thermally compensated insulating support for supporting a high-temperature molten salt transportation pipeline described in a certain embodiment of the present utility model.

[0021] In the figure: 1. support base; 2. upper transparent semi-cylinder; 3. upper black heat-absorbing semi-cylinder; 4. upper mirror-reflecting semi-cylinder; 5. upper internal supporting semi-cylinder; 6. upper connecting plate; 7. sealing plate; 8. lower transparent semi-cylinder; 9. lower black heat-absorbing semi-cylinder; 10. lower mirror-reflecting semi-cylinder; 11. lower internal supporting semi-cylinder; 12. lower connecting plate; 13. first reinforcing rib plate; 14. second reinforcing rib plate; 15. strip-shaped protrusion; 16. strip-shaped groove; 17. arc-shaped reflector; 18. bolt and nut assembly. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] In the description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms based on specific circumstances.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In one embodiment, Figure 1As shown, a thermal compensation insulation support for supporting a high-temperature molten salt transmission pipeline includes an upper insulation component, a lower insulation component and a support base 1. The upper insulation component includes an upper transparent semi-cylinder 2, an upper black heat-absorbing semi-cylinder 3, an upper mirror-reflecting semi-cylinder 4 and an upper internal support semi-cylinder 5 coaxially arranged from the outside to the inside. The space between the upper transparent semi-cylinder 2 and the upper black heat-absorbing semi-cylinder 3 is filled with silica aerogel with a light transmittance of 90%, and the space between the upper mirror-reflecting semi-cylinder 4 and the upper internal support semi-cylinder 5 is filled with aerogel with an infrared light absorption rate greater than 80%; the upper transparent semi-cylinder 2, the upper black heat-absorbing semi-cylinder 3, the upper mirror-reflecting semi-cylinder 4 and the upper internal support semi-cylinder 5 are filled with aerogel with an infrared light absorption rate greater than 80%. 3. The left and right cylinder wall sections of the upper mirror-reflecting semi-cylinder 4 and the upper internal supporting semi-cylinder 5 are respectively connected into a whole by the upper connecting plate 6. The axial ends of the upper heat-insulating assembly are sealed by the sealing plate 7. The reflecting surface of the upper mirror-reflecting semi-cylinder 4 faces the upper internal supporting semi-cylinder 5. The outer circumferential surface of the upper black heat-absorbing semi-cylinder 3 is coated with black paint; the lower heat-insulating assembly includes a lower transparent semi-cylinder 8, a lower black heat-absorbing semi-cylinder 9, a lower mirror-reflecting semi-cylinder 10 and a lower internal supporting semi-cylinder 11 which are coaxially mounted from the outside to the inside. The space between the lower transparent semi-cylinder 8 and the lower black heat-absorbing semi-cylinder 9 is filled with The light transmittance of the silica aerogel is 90%, and the space between the lower mirror-reflecting semi-cylinder 10 and the lower internal supporting semi-cylinder 11 is filled with aerogel with an infrared light absorption rate greater than 80%; the left side wall section and the right side wall section of the lower transparent semi-cylinder 8, the lower black heat-absorbing semi-cylinder 9, the lower mirror-reflecting semi-cylinder 10 and the lower internal supporting semi-cylinder 11 are respectively connected into a whole through the lower connecting plate 12, and the axial ends of the lower thermal insulation component are sealed and connected by the sealing plate 7, the reflecting surface of the lower mirror-reflecting semi-cylinder 10 faces the lower internal supporting semi-cylinder 11, and the outer circumferential surface of the upper black heat-absorbing semi-cylinder 3 is coated with black paint; The bright semi-cylinder 2, the upper black heat-absorbing semi-cylinder 3, the upper mirror-reflecting semi-cylinder 4 and the upper internal supporting semi-cylinder 5 are symmetrically arranged with the lower transparent semi-cylinder 8, the lower black heat-absorbing semi-cylinder 9, the lower mirror-reflecting semi-cylinder 10 and the lower internal supporting semi-cylinder 11 respectively. After the upper insulation component is aligned and fixedly connected with the lower connecting plate 12 of the lower insulation component through the upper connecting plate 6, the upper internal supporting semi-cylinder 5 and the lower internal supporting semi-cylinder 11 form a supporting cylinder for passing the high-temperature molten salt conveying pipeline; the supporting base 1 is supported between the lower insulation component and the ground, and the top of the supporting base 1 is adapted to the outer circular surface of the lower insulation component.

[0027] The aerogel with an infrared light absorption rate greater than 80% and the upper mirror-reflecting semi-cylinder 4 or the lower mirror-reflecting semi-cylinder 10 form an infrared thermal radiation reflection layer. For the fluid medium in the high-temperature molten salt conveying pipeline, its temperature is generally greater than 500°C, and the wavelength of the generated thermal radiation is distributed in the infrared region and the visible light region. After the upper internal support semi-cylinder 5 or the lower internal support semi-cylinder 11 absorbs the heat of the high-temperature molten salt conveying pipeline and heats up, the aerogel with an infrared light absorption rate greater than 80% can effectively reduce the heat loss caused by heat conduction. At the same time, the aerogel with an infrared light absorption rate greater than 80% will absorb part of the thermal radiation, and the other part of the thermal radiation will be reflected by the upper mirror-reflecting semi-cylinder 4 or the lower mirror-reflecting semi-cylinder 10, and then absorbed again by the upper internal support semi-cylinder 5 or the lower internal support semi-cylinder 11.

[0028] The silica aerogel with a light transmittance of 90% and the upper black heat-absorbing semi-cylinder 3 or the lower black heat-absorbing semi-cylinder 9 form a light-thermal compensation insulation layer. During the day when there is sufficient solar energy, the upper black heat-absorbing semi-cylinder 3 or the lower black heat-absorbing semi-cylinder 9 can absorb a large amount of solar energy to increase the temperature. At the same time, the outer layer of silica aerogel with a light transmittance of 90% can fully reduce heat loss.

[0029] The upper transparent semi-cylinder 2 and the lower transparent semi-cylinder 8 are provided to facilitate the passage of external sunlight.

[0030] Based on the above embodiment, in a preferred embodiment, at least two first reinforcing ribs 13 are supported vertically between the lower transparent semi-cylinder 8 and the lower black heat-absorbing semi-cylinder 9. At least two second reinforcing ribs 14 are supported radially between the lower specular reflective semi-cylinder 10 and the lower internal support semi-cylinder 11. The lengths of the first and second reinforcing ribs 13, 14 are parallel to the axial direction of the high-temperature molten salt transport pipeline. The provision of the first and second reinforcing ribs 13, 14 enhances the overall structural strength of the thermal insulation support. The steel plates support the overall mass of the pipeline, preventing deformation of the insulation layer under the influence of gravity.

[0031] Based on the above embodiment, in a preferred embodiment, the upper connecting plate 6 and the lower connecting plate 12 are provided with multiple sets of intermeshing strip protrusions 15 and strip grooves 16 arranged axially along the high-temperature molten salt delivery pipeline. Once the strip protrusions 15 and strip grooves 16 are connected, the upper connecting plate 6 and the lower connecting plate 12 cannot move in the radial direction, ensuring a secure connection between the upper and lower insulation assemblies.

[0032] Based on the above embodiment, in a preferred embodiment, the upper connecting plate 6 and the lower connecting plate 12 are fixedly connected by multiple sets of bolt and nut assemblies 18, and lubricating oil is applied between the upper connecting plate 6 and the lower connecting plate 12 to ensure airtightness of the contact surface. The provision of lubricating oil can improve the overall airtightness of the upper and lower insulation assemblies, thereby minimizing internal heat loss.

[0033] Based on the above embodiment, in a preferred embodiment, a curved reflector 17 with a central angle of 30° is installed on the inner wall of the lower transparent semi-cylinder 8, with the mirror surface of the curved reflector 17 facing the outer surface of the lower black heat-absorbing semi-cylinder 9. The curved reflector 17 is installed on the inner wall of the lower transparent semi-cylinder 8 to prevent only the upper black heat-absorbing semi-cylinder 3 in the upper insulation assembly from absorbing solar radiation, resulting in low energy utilization. The curvature of the curved reflector 17 is the same as that of the lower transparent semi-cylinder 8, and the central angle of the curved reflector 17 is 30°. This is to fully reflect and concentrate sunlight, ensuring that the bottom of the lower black heat-absorbing semi-cylinder 9 receives sufficient solar heat and ensuring a uniform temperature across the entire thermal compensation insulation support. The central angle of the curved reflector 17, i.e., its placement, can be adjusted appropriately based on the specific area of ​​use and sunlight exposure.

[0034] Based on the above embodiments, in a preferred embodiment, the upper transparent semi-cylinder 2 and the lower transparent semi-cylinder 8 are made of tempered glass; the upper mirror-reflecting semi-cylinder 4 and the lower mirror-reflecting semi-cylinder 10 are made of polytetrafluoroethylene propylene film silver-plated secondary surface mirrors.

[0035] Based on the above embodiment, in a preferred embodiment, the support base 1 is formed by pouring cement.

[0036] The above description is only a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be covered by the scope of protection of the claims.

Claims

1. A thermally compensated insulation support for supporting a high-temperature molten salt pipeline, characterized in that: The invention comprises an upper heat-insulating component, a lower heat-insulating component and a supporting base (1), wherein the upper heat-insulating component comprises an upper transparent semi-cylinder (2), an upper black heat-absorbing semi-cylinder (3), an upper mirror-reflecting semi-cylinder (4) and an upper internal supporting semi-cylinder (5) which are coaxially mounted in sequence from the outside to the inside, wherein the space between the upper transparent semi-cylinder (2) and the upper black heat-absorbing semi-cylinder (3) is filled with silicon dioxide aerogel with a light transmittance of 90%, and the space between the upper mirror-reflecting semi-cylinder (4) and the upper internal supporting semi-cylinder (5) is filled with aerogel with an infrared light absorption rate greater than 80%. The left side wall section and the right side wall section of (5) are connected to form a whole through the upper connecting plate (6), and the axial ends of the upper insulation component are sealed and connected through the sealing plate (7). The reflecting surface of the upper mirror-reflecting semi-cylinder (4) faces the upper internal supporting semi-cylinder (5), and the outer circumferential surface of the upper black heat-absorbing semi-cylinder (3) is coated with black paint; the lower insulation component includes a lower transparent semi-cylinder (8), a lower black heat-absorbing semi-cylinder (9), a lower mirror-reflecting semi-cylinder (10) and a lower internal supporting semi-cylinder (11) which are coaxially mounted from the outside to the inside, and the space between the lower transparent semi-cylinder (8) and the lower black heat-absorbing semi-cylinder (9) is filled with silicon dioxide gas condensate with a light transmittance of 90%. The lower mirror-reflecting semi-cylinder (10) and the lower internal supporting semi-cylinder (11) are filled with aerogel having an infrared light absorption rate greater than 80%; the left cylinder wall section and the right cylinder wall section of the lower transparent semi-cylinder (8), the lower black heat-absorbing semi-cylinder (9), the lower mirror-reflecting semi-cylinder (10) and the lower internal supporting semi-cylinder (11) are respectively connected into a whole through the lower connecting plate (12), and the axial ends of the lower thermal insulation component are sealed and connected through the sealing plate (7), the reflecting surface of the lower mirror-reflecting semi-cylinder (10) faces the lower internal supporting semi-cylinder (11), and the outer circumferential surface of the upper black heat-absorbing semi-cylinder (3) is coated with black paint; the upper transparent semi-cylinder (2), the upper black heat-absorbing semi-cylinder (9) and the lower mirror-reflecting semi-cylinder (10) are respectively connected into a whole through the lower connecting plate (12), and the axial ends of the lower thermal insulation component are sealed and connected through the sealing plate (7), the reflecting surface of the lower mirror-reflecting semi-cylinder (10) faces the lower internal supporting semi-cylinder (11), and the outer circumferential surface of the upper black heat-absorbing semi-cylinder (3) is coated with black paint; The color heat-absorbing semi-cylinder (3), the upper mirror-reflecting semi-cylinder (4) and the upper internal supporting semi-cylinder (5) are respectively arranged symmetrically with the lower transparent semi-cylinder (8), the lower black heat-absorbing semi-cylinder (9), the lower mirror-reflecting semi-cylinder (10) and the lower internal supporting semi-cylinder (11); after the upper insulation component is aligned and fixedly connected with the lower connecting plate (12) of the lower insulation component through the upper connecting plate (6), the upper internal supporting semi-cylinder (5) and the lower internal supporting semi-cylinder (11) form a supporting cylinder for passing the high-temperature molten salt conveying pipeline; the supporting base (1) is supported between the lower insulation component and the ground, and the top of the supporting base (1) is adapted to the outer circular surface of the lower insulation component.

2. The thermally compensating and insulating support for supporting a high-temperature molten salt pipeline according to claim 1, characterized in that: At least two first reinforcing ribs (13) located in a vertical direction are supported between the lower transparent semi-cylinder (8) and the lower black heat-absorbing semi-cylinder (9), and at least two second reinforcing ribs (14) located in a radial direction are supported between the lower mirror-reflecting semi-cylinder (10) and the lower internal supporting semi-cylinder (11). The length direction of the first reinforcing rib (13) and the second reinforcing rib (14) is parallel to the axial direction of the high-temperature molten salt conveying pipeline.

3. The thermally compensating and insulating support for supporting a high-temperature molten salt transportation pipeline according to claim 2, characterized in that: The upper connecting plate (6) and the lower connecting plate (12) are provided with a plurality of groups of mutually meshed strip-shaped protrusions (15) and strip-shaped grooves (16) arranged along the axial direction of the high-temperature molten salt delivery pipeline.

4. The thermally compensating and insulating support for supporting a high-temperature molten salt transportation pipeline according to claim 3, characterized in that: The upper connecting plate (6) and the lower connecting plate (12) are fixedly connected by a plurality of sets of bolt and nut assemblies (18), and lubricating oil is applied between the upper connecting plate (6) and the lower connecting plate (12) to ensure airtightness of the contact surface.

5. The thermally compensating and insulating support for supporting a high-temperature molten salt transportation pipeline according to claim 4, characterized in that: An arc-shaped reflector (17) with a central angle of 30° is laid on the inner wall of the lower transparent semi-cylinder (8), and the mirror surface of the arc-shaped reflector (17) faces the outer circular surface of the lower black heat-absorbing semi-cylinder (9).

6. The thermally compensating and insulating support for supporting a high-temperature molten salt transportation pipeline according to claim 5, characterized in that: The upper transparent semi-cylinder (2) and the lower transparent semi-cylinder (8) are made of tempered glass; the upper mirror-reflecting semi-cylinder (4) and the lower mirror-reflecting semi-cylinder (10) are made of a polytetrafluoroethylene propylene film silver-plated secondary surface mirror.

7. The thermally compensating and insulating support for supporting a high-temperature molten salt transportation pipeline according to claim 6, characterized in that: The supporting base (1) is formed by pouring cement.

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