Leakage-proof device for molten salt heat storage

Abstract

This invention discloses a leak-proof device for molten salt thermal storage, relating to the field of high-temperature heat transfer and energy storage technology. It includes a thermal storage tank, a sealed container, a leak-proof unit, and a diversion unit. The sealed container supports and secures the thermal storage tank, and is used for installing and securing the leak-proof unit and the diversion unit. The leak-proof unit seals leaks in the thermal storage tank, and the diversion unit diverts leaked molten salt away from the equipment area. When a leak occurs outside the thermal storage tank, the leak-proof unit quickly seals the leak, while the diversion unit removes and diverts the leaked molten salt away from the equipment area, preventing high-temperature molten salt from spraying or flowing and causing severe thermal damage to the equipment, insulation layer, and supporting structure.

Description

Technical Field

[0001] This invention relates to the field of high-temperature heat transfer and energy storage technology, specifically a leak-proof device for molten salt thermal storage. Background Technology

[0002] Molten salt thermal energy storage systems, with their advantages of high thermal density, wide operating temperature range, and strong thermal stability, are widely used in fields such as concentrated solar power (CSP) and industrial waste heat recovery. Their safe and stable operation directly depends on the system's leak-proof performance. As the core equipment of the system, the molten salt thermal energy storage tank has critical points prone to leakage due to factors such as high-temperature thermal expansion and contraction, media erosion, and aging of seals, including tank welds, bottom interfaces, side pipes, manholes, flange connections, and insulation layer gaps.

[0003] Once a molten salt thermal storage system leaks, the high-temperature molten salt will rapidly spray or flow along the surface of the equipment, causing severe thermal damage to surrounding equipment, insulation layers, and supporting structures, leading to equipment deformation, insulation layer failure, and weakening of the supporting structure. It may also trigger a chain of risks such as molten salt solidification blocking pipes and localized high-temperature fires. At the same time, leaked molten salt is prone to reacting with air and moisture to generate corrosive substances, which will exacerbate equipment corrosion, significantly shorten the system's service life, and increase operation and maintenance costs and safety hazards.

[0004] Current technologies for leak containment primarily rely on manual intervention or remote control to shut off upstream valves, with response times measured in minutes, making them unsuitable for emergency situations involving jet leaks. While some emergency shut-off valve designs exist, their actuation sources are mostly electricity or instrument gas, which also face the risk of failure in accident environments. Currently, there is a severe lack of purely mechanical active shut-off devices that can utilize the physical signals generated by the leak event itself (such as sudden pressure changes or rapid temperature increases) as driving energy to achieve a rapid response in milliseconds to seconds without external power intervention.

[0005] Existing designs often focus only on "how to trigger an alarm" or "how to shut off the valve," but lack proactive guidance and containment measures for molten salt that has already leaked and is causing damage. The usual approach is to let it flow and spread until operators arrive and perform hazardous manual cleanup, which greatly expands the scope and extent of thermal damage. There is an urgent need for an integrated design that can automatically activate and safely and quickly remove the leaked material from critical equipment areas while simultaneously blocking the leak source. Summary of the Invention

[0006] The technical problem to be solved by the present invention is the problem of leakage prevention in molten salt thermal storage, and a leakage prevention device for molten salt thermal storage is provided.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] The leak prevention device includes a sealed barrel, on which a heat storage tank is installed;

[0009] The sealed container is equipped with a leak prevention unit, which includes a leak prevention component. The leak prevention component seals the leak in the heat storage tank by sensing temperature. The leak prevention component includes a detection element and a sealing element. The detection element is installed on the sealed container, and the sealing element is slidably connected to the heat storage tank.

[0010] The sealed tank is equipped with a dewatering unit, which includes a dewatering component. The dewatering component removes leaked molten salt by changing its position. The dewatering component includes an actuator, a blocking component, and a dewatering component. The blocking component is located at the bottom of the heat storage tank, the actuator is installed inside the blocking component, and the actuator and the dewatering component are fixedly connected.

[0011] The sealed tank is also equipped with a controller, which is electrically connected to the detection element, sealing element, and actuator of the leakage prevention unit, respectively, and is used to receive detection signals and control the coordinated operation of each component. Existing molten salt thermal storage tanks cannot promptly plug leaks, and leaked molten salt, if not cleaned up in time, can damage the equipment and its supporting structure. This invention, through the leakage prevention unit and the actuator, simultaneously seals the leak and promptly cleans up the leaked molten salt, preventing damage to the equipment.

[0012] Furthermore, the actuator includes an electromagnet, a return spring, a guide post, a disk, and a movable disk. The electromagnet is fixedly connected to the return spring, the return spring is fixedly connected to the disk, and the guide post is fixedly connected to the electromagnet. A conductive ring is provided on the movable disk, and the movable disk is slidably connected to the guide post through the conductive ring. In the prior art, the actuators of the take-off unit mostly rely on pure mechanical transmission, which has the problems of slow response and low action accuracy, and it is difficult to achieve coordinated linkage with other components. This invention achieves rapid response and precise displacement of the actuator through the electromagnet drive combined with the return spring, the sliding cooperation of the conductive ring and the guide post, while providing stable power for the linkage of subsequent components.

[0013] Furthermore, a drive coil is provided on the guide post, with the drive coil near the moving disk serving as the current input terminal.

[0014] Furthermore, the blocking component includes an elastic telescopic baffle and a pull rope. The electromagnet is fixedly installed at the fixed end of the elastic telescopic baffle, which is also fixedly installed at the bottom of the thermal storage tank. One end of the pull rope is fixedly connected to the telescopic end of the elastic telescopic baffle, and the other end is fixedly connected to the moving disk. In the prior art, most molten salt leakage blocking structures are rigid designs and cannot be synchronized with the extraction unit, resulting in a disconnect between blocking and removal. This invention uses an elastic telescopic baffle to resist molten salt impact, while simultaneously utilizing the pull rope and the moving disk to achieve synchronous triggering of the blocking action and the extraction unit, ensuring that the molten salt can be removed promptly after blocking.

[0015] Furthermore, the extraction component includes a spring-loaded electric push rod and an arc-shaped telescopic rod. A conductive ring on the moving disk is electrically connected to the spring-loaded electric push rod. The guide post is fixedly connected to the fixed end of the spring-loaded electric push rod. The fixed end of the spring-loaded electric push rod is fixedly installed on the inner surface of the sealed container at the end away from the thermal storage tank. The telescopic end of the spring-loaded electric push rod is fixedly connected to the fixed end of the arc-shaped telescopic rod. Multiple sets of arc-shaped telescopic rods are provided, with their telescopic ends fixedly connected. In existing technologies, molten salt extraction structures are mostly single-channel designs, with limited extraction range and difficulty in adapting to the arc-shaped structure at the bottom of the thermal storage tank, resulting in incomplete cleaning of molten salt residue. This invention, through multiple sets of arc-shaped telescopic rods combined with spring-loaded electric push rods, can form a surrounding extraction channel, expanding the extraction range and adapting to the bottom structure of the thermal storage tank, achieving comprehensive and directional removal of leaked molten salt.

[0016] Furthermore, the detection component includes a pressure gauge, which is fixedly installed on a sealed barrel, forming a sealed chamber between the sealed barrel and the heat storage tank.

[0017] Furthermore, the anti-clogging component includes an electric telescopic rod and a sealing ring. The fixed end of the electric telescopic rod is fixedly installed on the inner surface of the sealed tank at the end away from the heat storage tank. The telescopic end of the electric telescopic rod is fixedly connected to the sealing ring, and the sealing ring is slidably connected to the outer wall of the heat storage tank. The sealing ring has a built-in temperature sensor. Existing sealing structures are mostly fixed sealing designs, which cannot dynamically adjust the sealing position according to the leakage location, and the sealing accuracy is low. This invention uses an electric telescopic rod to drive the sealing ring to slide, and in conjunction with the built-in temperature sensor, accurately locates the leakage location and achieves dynamic sealing, thus improving sealing accuracy.

[0018] Furthermore, a discharge port is provided at the bottom of the sealed container. In the prior art, leaked molten salt lacks a directional discharge channel and is prone to stagnation and solidification inside the sealed container, leading to equipment corrosion and cleaning difficulties. This invention, by setting a discharge port at the bottom of the sealed container, in conjunction with a guide unit, enables the directional and rapid discharge of leaked molten salt to an external collection box, avoiding damage to the equipment caused by molten salt stagnation.

[0019] Furthermore, a support platform is provided inside the sealed container for supporting and fixing the heat storage tank.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention, when a leak occurs, involves the controller supplying current to an electromagnet. The electromagnet, energized, exhibits the same polarity as the magnetic disk. Due to the repulsion of like poles, the magnetic disk stretches its reset spring, causing the moving disk to move downwards along the guide post. This gradually reduces the effective number of turns of the drive coil connected to the circuit, lowering the resistance. Consequently, the current supplied by the controller to the drive coil, via the conductive ring, gradually increases to the elastic electric push rod, causing it to gradually contract. This contraction, in turn, causes the arc-shaped telescopic rod to contract synchronously, narrowing the area and diverting the molten salt leaking inside the sealed container towards the flow path. The feed inlet is cleaned to prevent molten salt from accumulating, which could lead to equipment corrosion and cleaning difficulties. Meanwhile, as the moving disc moves downwards, the pull rope retracts the elastic telescopic baffle upwards, opening the channel for molten salt to flow into the feed inlet. Once cleaning is complete, the controller stops supplying current to the electromagnet, and the return spring's self-restoring force resets the elastic telescopic baffle, protecting the support platform inside. The presence of the elastic telescopic baffle prevents molten salt from contacting the support platform and causing damage in the event of a leak.

[0022] 2. This invention addresses the issue of molten salt leakage. When molten salt leaks from the outer wall of the thermal storage tank, it flows into the sealed chamber between the sealed container and the thermal storage tank, rapidly consuming the air within the chamber and causing a pressure change. A pressure gauge detects this change and sends a signal to the controller. The controller then synchronously supplies current to the electromagnet and the electric push rod. Upon receiving the current, the electric push rod extends, causing the sealing ring to slide along the outer wall of the thermal storage tank. When a temperature sensor inside the sealing ring detects a sudden temperature change, it sends a signal to the controller. The controller then stops supplying current to the electric push rod, maintaining its current extension and retraction, thus ensuring the sealing ring precisely seals the leak and prevents further molten salt leakage.

[0023] 3. This invention forms a sealed chamber between the sealed barrel and the heat storage tank, and uses a pressure gauge to achieve early and accurate detection by utilizing the pressure changes caused by the leakage and evaporation of molten salt, thereby determining whether a leak has occurred and improving the reliability of the detection. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the sealed barrel of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the elastic telescopic baffle of the present invention;

[0027] Figure 4 This is a schematic diagram of the external structure of the anti-leakage unit of the present invention;

[0028] Figure 5 This is a schematic diagram of the external structure of the extraction unit of the present invention;

[0029] Figure 6 This is a schematic diagram of the closed-loop material outlet structure of the present invention.

[0030] In the diagram: 1. Sealed tank; 11. Support platform; 2. Heat storage tank; 3. Leakage prevention unit; 31. Pressure gauge; 32. Electric telescopic rod; 33. Sealing ring; 4. Detachment unit; 41. Electromagnet; 42. Return spring; 43. Guide post; 44. Disk disk; 45. Moving disk; 46. Elastic telescopic baffle; 47. Pull rope; 48. Spring electric push rod; 49. Arc-shaped telescopic rod. Detailed Implementation

[0031] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example: Figures 1-6 As shown, the present invention provides the following technical solution:

[0033] like Figure 1 , Figure 2 As shown, the leak prevention device includes a sealed container 1, and a heat storage tank 2 is installed on the sealed container 1.

[0034] A leak prevention unit 3 is installed inside the sealed container 1. The leak prevention unit 3 includes a leak prevention component. The leak prevention component seals the leak point of the heat storage tank 2 through temperature sensing. The leak prevention component includes a detection element and a sealing element. The detection element is installed on the sealed container 1, and the sealing element is slidably connected to the heat storage tank 2.

[0035] The sealed tank 1 is equipped with a separation unit 4, which includes a separation component. The separation component removes leaked molten salt by changing its position. The separation component includes an actuator, a blocking component, and a separation component. The blocking component is located at the bottom of the heat storage tank 2, the actuator is installed inside the blocking component, and the actuator and the separation component are fixedly connected.

[0036] The sealed container 1 is also equipped with a controller, which is electrically connected to the detection component, sealing component and the actuator of the leakage prevention unit 3 and the guide unit 4, respectively, to receive detection signals and control the coordinated action of each component.

[0037] like Figure 5As shown, the actuators include an electromagnet 41, a reset spring 42, a guide post 43, a disk 44, and a movable disk 45. The electromagnet 41 is fixedly connected to the reset spring 42, the reset spring 42 is fixedly connected to the disk 44, the guide post 43 is fixedly connected to the electromagnet 41, and a conductive ring is provided on the movable disk 45. The movable disk 45 is slidably connected to the guide post 43 through the conductive ring.

[0038] like Figure 5 As shown, a drive coil is provided on the guide post 43, and the drive coil near the moving disk 45 is the current input terminal.

[0039] The more the moving disk 45 moves downward, the smaller the effective number of turns of the drive coil connected to the circuit, which in turn makes the current received by the spring electric push rod 48 greater, the longer the retraction distance of the spring electric push rod 48, and the larger the range of the leaked molten salt that is wrapped and retracted for cleaning, so that the leaked molten salt is cleaned from the discharge port to the external receiving box.

[0040] like Figure 5 As shown, the blocking component includes an elastic telescopic baffle 46 and a pull rope 47. An electromagnet 41 is fixedly installed at the fixed end of the elastic telescopic baffle 46. The fixed end of the elastic telescopic baffle 46 is fixedly installed at the bottom of the heat storage tank 2. One end of the pull rope 47 is fixedly connected to the telescopic end of the elastic telescopic baffle 46, and the other end of the pull rope 47 is fixedly connected to the movable disk 45.

[0041] like Figure 5 As shown, the release element includes a spring-driven electric push rod 48 and an arc-shaped telescopic rod 49. The conductive ring on the moving disk 45 is electrically connected to the spring-driven electric push rod 48. The guide post 43 is fixedly connected to the fixed end of the spring-driven electric push rod 48. The fixed end of the spring-driven electric push rod 48 is fixedly installed on the inner surface of the sealed barrel 1 away from the heat storage tank 2. The telescopic end of the spring-driven electric push rod 48 is fixedly connected to the fixed end of the arc-shaped telescopic rod 49. There are multiple sets of arc-shaped telescopic rods 49, and the telescopic ends of the multiple sets of arc-shaped telescopic rods 49 are fixedly connected.

[0042] When a leak occurs, the controller supplies current to the electromagnet 41. The electromagnet 41, energized, exhibits the same polarity as the disk 44. Due to the repulsion of like poles, the disk 44 stretches the reset spring 42, causing the moving disk 45 to move downwards along the guide post 43. This gradually reduces the effective number of turns of the drive coil connected to the circuit, lowering the resistance. Consequently, the current supplied by the controller to the drive coil, via the conductive ring, gradually increases to the elastic electric push rod, causing it to gradually contract. This, in turn, causes the arc-shaped telescopic rod 49 to contract synchronously, narrowing the area and clearing the molten salt leaked inside the sealed container 1 towards the discharge port. To prevent molten salt from accumulating and causing equipment corrosion and cleaning difficulties, the elastic telescopic baffle 46 retracts upward under the action of the pull rope 47 during the downward movement of the moving plate 45, thereby opening the channel for molten salt to be cleaned to the flow port. When cleaning is completed, the controller stops supplying current to the electromagnet 41, and the elastic telescopic baffle 46 is reset under the self-restoring force of the reset spring 42, thus protecting the support platform 11 inside the elastic telescopic baffle 46 again. Due to the presence of the elastic telescopic baffle 46, in the event of leakage, the molten salt is prevented from contacting the support platform 11 and causing damage to the support platform 11.

[0043] like Figure 4 As shown, the testing component includes a pressure gauge 31, which is fixedly installed on the sealed barrel 1, forming a sealed chamber between the sealed barrel 1 and the heat storage tank 2.

[0044] By using a sealed chamber in conjunction with a pressure gauge 31, the pressure change caused by the evaporation of molten salt leakage can be used to achieve early and accurate detection, determine whether a leak has occurred, and improve the reliability of the detection.

[0045] like Figure 4 As shown, the anti-clogging component includes an electric telescopic rod 32 and a sealing ring 33. The fixed end of the electric telescopic rod 32 is fixedly installed on the inner surface of the sealed tank 1 away from the heat storage tank 2. The telescopic end of the electric telescopic rod 32 is fixedly connected to the sealing ring 33. The sealing ring 33 is slidably connected to the outer wall of the heat storage tank 2. The sealing ring 33 has a built-in temperature sensor.

[0046] When molten salt leaks from the outer wall of the thermal storage tank 2, the molten salt flows into the sealed chamber between the sealed container 1 and the thermal storage tank 2, rapidly consuming the air in the sealed chamber and causing a change in air pressure. The air pressure gauge 31 detects the change in air pressure and sends a signal to the controller. The controller synchronously sends current to the electromagnet 41 and the electric push rod. After receiving the current, the electric push rod extends, driving the sealing ring 33 to slide along the outer wall of the thermal storage tank 2. When the temperature sensor inside the sealing ring 33 detects a sudden change in temperature, it sends a signal back to the controller. The controller stops sending current to the electric push rod, keeping the electric push rod at its current extension and retraction, so that the sealing ring 33 can accurately seal the leak and prevent the molten salt from leaking.

[0047] like Figure 6 As shown, a material outlet is provided at the bottom of the sealed barrel 1.

[0048] The discharge port, in conjunction with the guide unit 4, directs and quickly discharges the leaked molten salt to an external collection box, preventing molten salt from accumulating and damaging the equipment.

[0049] like Figure 3 As shown, a support platform 11 is provided inside the sealed tank 1 for supporting and fixing the heat storage tank 2.

[0050] Working principle of the invention:

[0051] When molten salt leaks from the outer wall of the thermal storage tank 2, the molten salt flows into the sealed chamber between the sealed container 1 and the thermal storage tank 2, rapidly consuming the air in the sealed chamber and causing a change in air pressure. The air pressure gauge 31 detects the change in air pressure and sends a signal to the controller. The controller synchronously sends current to the electromagnet 41 and the electric push rod. After receiving the current, the electric push rod extends, driving the sealing ring 33 to slide along the outer wall of the thermal storage tank 2. When the temperature sensor inside the sealing ring 33 detects a sudden change in temperature, it sends a signal back to the controller. The controller stops sending current to the electric push rod, keeping the electric push rod at its current extension and retraction, so that the sealing ring 33 can accurately seal the leak and prevent the molten salt from leaking.

[0052] When electromagnet 41 is energized, it exhibits the same polarity as disk 44. Under the repulsive force of like poles, disk 44 stretches the reset spring 42, causing the moving disk 45 to move downwards along guide post 43. This gradually reduces the effective number of turns of the drive coil connected to the circuit, and the resistance of the connected circuit gradually decreases. Consequently, the current supplied by the controller to the drive coil through the conductive ring gradually increases, causing the elastic electric push rod to gradually contract. This, in turn, causes the arc-shaped telescopic rod 49 to contract synchronously, narrowing the area and clearing the molten salt leaked inside the sealed container 1 towards the discharge port, preventing molten salt retention. This leads to problems such as equipment corrosion and difficulty in cleaning. On the other hand, during the downward movement of the moving plate 45, the elastic telescopic baffle 46 retracts upward under the action of the pull rope 47, thereby opening the channel for molten salt to be cleaned to the flow port. When the cleaning is completed, the controller stops supplying current to the electromagnet 41. Under the action of the self-restoring force of the return spring 42, the elastic telescopic baffle 46 is reset, and the support platform 11 is protected inside the elastic telescopic baffle 46 again. Due to the presence of the elastic telescopic baffle 46, in the event of leakage, the molten salt is prevented from contacting the support platform 11 and causing damage to the support platform 11.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof device for molten salt thermal storage, characterized in that: The leak prevention device includes a sealed barrel (1), and a heat storage tank (2) is provided on the sealed barrel (1). The sealed barrel (1) is provided with a leak prevention unit (3). The leak prevention unit (3) includes a leak prevention component. The leak prevention component seals the leak in the heat storage tank (2) by temperature sensing. The leak prevention component includes a detection component and a sealing component. The detection component is installed on the sealed barrel (1). The sealing component is slidably connected to the heat storage tank (2). The sealed tank (1) is provided with a separation unit (4). The separation unit (4) includes a separation component. The separation component removes leaked molten salt by changing its position. The separation component includes an actuator, a blocking component and a separation component. The blocking component is located at the bottom of the heat storage tank (2). The actuator is installed inside the blocking component. The actuator and the separation component are fixedly connected. The sealed container (1) is also equipped with a controller, which is electrically connected to the detection component, sealing component and the actuator of the leakage prevention unit (3) and the deflection unit (4) respectively, and is used to receive detection signals and control the coordinated action of each component.

2. The leak-proof device for molten salt thermal storage according to claim 1, characterized in that: The actuator includes an electromagnet (41), a reset spring (42), a guide post (43), a disk (44), and a movable disk (45). The electromagnet (41) is fixedly connected to the reset spring (42), the reset spring (42) is fixedly connected to the disk (44), the guide post (43) is fixedly connected to the electromagnet (41), and a conductive ring is provided on the movable disk (45). The movable disk (45) is slidably connected to the guide post (43) through the conductive ring.

3. The leak-proof device for molten salt thermal storage according to claim 2, characterized in that: A drive coil is provided on the guide post (43), and the drive coil near the end of the moving disk (45) is the current input terminal.

4. The leak-proof device for molten salt thermal storage according to claim 3, characterized in that: The blocking component includes an elastic telescopic baffle (46) and a pull rope (47). The electromagnet (41) is fixedly installed at the fixed end of the elastic telescopic baffle (46). The fixed end of the elastic telescopic baffle (46) is fixedly installed at the bottom of the heat storage tank (2). One end of the pull rope (47) is fixedly connected to the telescopic end of the elastic telescopic baffle (46), and the other end of the pull rope (47) is fixedly connected to the moving disk (45).

5. A leak-proof device for molten salt thermal storage according to claim 4, characterized in that: The lead-out component includes a spring-driven electric push rod (48) and an arc-shaped telescopic rod (49). The conductive ring on the moving disk (45) is electrically connected to the spring-driven electric push rod (48). The guide post (43) is fixedly connected to the fixed end of the spring-driven electric push rod (48). The fixed end of the spring-driven electric push rod (48) is fixedly installed on the inner surface of the sealed barrel (1) away from the heat storage tank (2). The telescopic end of the spring-driven electric push rod (48) is fixedly connected to the fixed end of the arc-shaped telescopic rod (49). There are multiple sets of arc-shaped telescopic rods (49), and the telescopic ends of multiple sets of arc-shaped telescopic rods (49) are fixedly connected.

6. The leak-proof device for molten salt thermal storage according to claim 1, characterized in that: The testing component includes a pressure gauge (31), which is fixedly installed on a sealed barrel (1), and a sealed chamber is formed between the sealed barrel (1) and the heat storage tank (2).

7. A leak-proof device for molten salt thermal storage according to claim 6, characterized in that: The anti-clogging component includes an electric telescopic rod (32) and a sealing ring (33). The fixed end of the electric telescopic rod (32) is fixedly installed on the inner surface of the sealed barrel (1) away from the heat storage tank (2). The telescopic end of the electric telescopic rod (32) is fixedly connected to the sealing ring (33). The sealing ring (33) is slidably connected to the outer wall of the heat storage tank (2). The sealing ring (33) has a built-in temperature sensor.

8. The leak-proof device for molten salt thermal storage according to claim 1, characterized in that: The sealed barrel (1) has a material outlet at the bottom.

9. A leak-proof device for molten salt thermal storage according to claim 1, characterized in that: The sealed container (1) is equipped with a support platform (11) for supporting and fixing the heat storage tank (2).

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