Anti-leakage device for fused salt heat storage tank

Abstract

The utility model relates to the technical field of molten salt heat storage tank leakage prevention, in particular to a molten salt heat storage tank leakage prevention device, which comprises a shell, a sealing ring, a sealing ring and a sealing ring, the bottom end of the fused salt heat storage tank main body penetrates through the through hole, extends into the shell and is used for storing fused salt; the leak-proof base is arranged at the bottom end of the molten salt heat storage tank main body, is tightly attached to the molten salt heat storage tank main body and is used for preventing the bottom of the molten salt heat storage tank main body from leaking; and the dismounting device is arranged below the leakproof base. When the bottom end of the molten salt heat storage tank body leaks, the leakage-proof base is used for temporarily blocking the leakage position, and during maintenance, the device is dismounted to drive the leakage-proof base to move downwards, so that the leakage-proof base is separated from the molten salt heat storage tank body, a certain space is reserved, the bottom end of the molten salt heat storage tank body can be maintained, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage prevention of molten salt heat storage tanks, in particular to a leakage prevention device for a molten salt heat storage tank. Background Art

[0002] Molten salt is usually a high-boiling point, low-viscosity inorganic salt mixture, such as a mixture of potassium nitrate and sodium nitrate. The molten salt heat storage tank is a container for storing molten salt. After a long period of use, the molten salt heat storage tank will corrode the bottom of the molten salt heat storage tank due to the corrosive composition of the molten salt, causing cracks and causing molten salt to leak along the cracks. This requires the use of a molten salt heat storage tank anti-leakage device to prevent molten salt leakage.

[0003] However, when the existing molten salt heat storage tank anti-leakage device is in use, the molten salt heat storage tank is placed on the anti-leakage device, and the corrosion resistance of the anti-leakage device itself is utilized to prevent the leakage of molten salt, and the leakage is detected in time for maintenance. However, when performing maintenance, the molten salt heat storage tank needs to be lifted so that the molten salt heat storage tank can be separated from the anti-leakage device for maintenance. However, the molten salt heat storage tank itself has a large mass and is not convenient to move. The anti-leakage device cannot be removed from the bottom of the molten salt heat storage tank, which is not convenient for maintenance. Utility Model Content

[0004] The utility model aims to solve the problem that the existing anti-leakage device for a molten salt heat storage tank cannot be disassembled from the bottom of the molten salt heat storage tank, causing inconvenience in maintenance.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A molten salt heat storage tank anti-leakage device, comprising:

[0007] A shell, wherein a through hole is formed on the top of the shell;

[0008] A molten salt heat storage tank body, the bottom end of which passes through the through hole and extends to the interior of the shell, and is used to store molten salt;

[0009] An anti-leakage base is arranged at the bottom end of the molten salt heat storage tank body and is closely fitted to the molten salt heat storage tank body to prevent leakage from the bottom of the molten salt heat storage tank body;

[0010] The disassembly device is arranged below the anti-leakage base and fixedly connected to the anti-leakage base, and is used to separate the anti-leakage base from the molten salt heat storage tank body.

[0011] Preferably, the disassembly device comprises:

[0012] A spur gear is disposed at the lower part of the housing;

[0013] Two sets of racks are symmetrically arranged along the center of the spur gear and meshed with the spur gear;

[0014] An electric push rod, the output end of which is fixedly connected to one end of the rack below close to the spur gear, and is used to push the rack to move horizontally;

[0015] Two groups of connecting members are arranged on a side of the rack away from the spur gear and fixedly connected to the spur gear, the connecting members are composed of a vertical plate and a horizontal plate, and a side of the vertical plate away from the spur gear is fixedly connected to the horizontal plate;

[0016] Two groups of movable plates are arranged at one end of the horizontal plate away from the vertical plate and are fixedly connected to the horizontal plate, and a sliding groove is provided on the surface of each group of movable plates;

[0017] Two groups of support members, each group of support members consists of a conical block, a strip block and a cylindrical pin, the top end of the conical block is fixedly connected to the anti-leakage base, the bottom end of the conical block is fixedly connected to the strip block, the surface of the strip block is fixedly connected to the cylindrical pin, the cylindrical pin is arranged in the slide groove, and is slidably connected to the movable plate through the slide groove.

[0018] Preferably, it further comprises: two groups of support plates; the two groups of support plates are symmetrically arranged on both sides of the molten salt heat storage tank body, and the bottom ends of the support plates are tightly fitted with the shell, so as to support the molten salt heat storage tank body.

[0019] Preferably, it also includes: two groups of telescopic parts; the two groups of telescopic parts are symmetrically arranged on both sides of the anti-leakage base and fixedly connected to the anti-leakage base, the telescopic parts are composed of a sleeve and a limiting rod, the bottom end of the limiting rod extends to the interior of the sleeve and is slidably connected to the sleeve, and the bottom end of the sleeve is fixedly connected to the shell to limit the moving direction of the anti-leakage base.

[0020] Preferably, a sealing ring is provided between the molten salt heat storage tank body and the through hole, and the sealing ring is used for sealing.

[0021] Preferably, it also includes: a cooling device; the cooling device is arranged on a side of the shell away from the electric push rod, and is used to dissipate heat from the anti-leakage base.

[0022] Preferably, the cooling device comprises:

[0023] A cooling air duct, one end of which is connected to the interior of the housing and the other end of which is connected to the outside;

[0024] The fan blades are arranged inside the cooling air duct;

[0025] A first motor, wherein an output end of the first motor is fixedly connected to the fan blades, and is used to drive the fan blades to rotate;

[0026] The dust filter is arranged inside the cooling air duct and is located at a side away from the fan blades.

[0027] Preferably, it also includes: a side wall anti-leakage device; the side wall anti-leakage device is arranged above the interior of the shell, and is used to prevent the side wall of the molten salt heat storage tank body from leaking.

[0028] Preferably, the side wall anti-leakage device comprises:

[0029] Threaded rod;

[0030] A second motor, wherein an output end of the second motor is fixedly connected to a top end of the threaded rod, and is used for driving the threaded rod to rotate;

[0031] A connecting plate, the connecting plate being threadedly connected to the threaded rod via a nut;

[0032] A groove plate, wherein a slideway is provided on the surface of the groove plate, and a slider is provided in the slideway, and the slider is fixedly connected to the connecting plate to limit the connecting plate to move only vertically;

[0033] An anti-leakage ring is arranged at one end of the connecting plate away from the threaded rod and is fixedly connected to the connecting plate. The anti-leakage ring is sleeved on the surface of the molten salt heat storage tank body to prevent leakage of the side wall of the molten salt heat storage tank body.

[0034] Preferably, it further comprises: a pressure gauge; the pressure gauge is arranged on a side of the shell away from the cooling device, and is used to detect the pressure inside the shell.

[0035] The beneficial effect proposed by the utility model is that when leakage occurs at the bottom end of the molten salt heat storage tank body, the leakage is temporarily blocked by the anti-leakage base. When repairing, the anti-leakage base is driven downward by the disassembly device, so that the anti-leakage base is separated from the molten salt heat storage tank body and a certain space is left, so that the bottom end of the molten salt heat storage tank body can be repaired, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of the utility model;

[0037] Figure 2 for Figure 1 Schematic diagram of the main plan view of the internal connection structure;

[0038] Figure 3 for Figure 2 A three-dimensional enlarged schematic diagram of the anti-leakage base structure;

[0039] Figure 4 for Figure 1 A top view of the internal connection structure;

[0040] Figure 5 for Figure 2 Schematic diagram of the connection structure at A in the middle;

[0041] Figure 6 for Figure 2 Schematic diagram of the connection structure at B in the middle;

[0042] Figure 7 This is a schematic diagram of the connection structure of Example 2.

[0043] In the figure: 1. shell, 2. sealing ring, 3. molten salt heat storage tank body, 4. anti-leakage base, 5. support member, 6. movable plate, 7. connecting member, 8. rack, 9. spur gear, 10. electric push rod, 11. support plate, 12. telescopic member, 13. cooling air duct, 14. fan blade, 15. first motor, 16. dust filter, 17. pressure gauge, 18. threaded rod, 19. second motor, 20. connecting plate, 21. anti-leakage ring, 22. groove plate. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with the accompanying drawings:

[0045] Embodiment 1:

[0046] See also Figure 1-6 In this embodiment: a molten salt heat storage tank leakage prevention device includes: a shell 1, a molten salt heat storage tank body 3, an anti-leakage base 4 and a disassembly device.

[0047] In this embodiment, a through hole is provided on the top of the shell 1; the bottom end of the molten salt heat storage tank body 3 passes through the through hole and extends to the inside of the shell 1 for storing molten salt, in which there is a large amount of heat; the anti-leakage base 4 is arranged at the bottom end of the molten salt heat storage tank body 3 and is tightly fitted with the molten salt heat storage tank body 3, and a notch is provided at the upper end of the anti-leakage base 4, which can wrap the bottom end of the molten salt heat storage tank body 3 to prevent leakage from the bottom of the molten salt heat storage tank body 3, and the anti-leakage base 4 is made of silicone rubber material, which has the advantages of strong salt corrosion resistance and high temperature resistance, and a first temperature sensor is installed below the anti-leakage base 4, such as Figure 5As shown, leakage of the molten salt heat storage tank body 3 can be detected in time; the disassembly device is arranged below the anti-leakage base 4 and is fixedly connected to the anti-leakage base 4, and is used to separate the anti-leakage base 4 from the molten salt heat storage tank body 3. By moving the anti-leakage base 4 downward, the anti-leakage base 4 is separated from the molten salt heat storage tank body 3, and a certain space is left, so that the bottom end of the molten salt heat storage tank body 3 can be repaired.

[0048] The disassembly device comprises: a spur gear 9, two groups of racks 8, an electric push rod 10, two groups of connecting members 7, two groups of moving plates 6 and two groups of supporting members 5.

[0049] In this embodiment, the spur gear 9 is arranged at the lower part of the housing 1; the two sets of racks 8 are symmetrically arranged along the center of the spur gear 9 and meshed with the spur gear 9. The upper rack 8 can overlap with the lower rack 8 after rotating 180 degrees along the center of the spur gear 9, and the movement directions of the two sets of racks 8 are opposite; the output end of the electric push rod 10 is fixedly connected to the end of the lower rack 8 close to the spur gear 9, which is used to push the rack 8 to move horizontally; the two sets of connecting members 7 are arranged on the side of the rack 8 away from the spur gear 9 and are fixedly connected to the spur gear 9. The rack 8 drives the connecting member 7 to move. The connecting member 7 is composed of a vertical plate and a horizontal plate. The vertical plate is away from the side of the spur gear 9 It is fixedly connected to the horizontal plate; two groups of movable plates 6 are arranged at one end of the horizontal plate away from the vertical plate, and are fixedly connected to the horizontal plate, a slide groove is provided on the surface of each group of movable plates 6, and the connecting member 7 drives the movable plate 6 to move; each group of support members 5 is composed of a conical block, a strip block and a cylindrical pin, the top of the conical block is fixedly connected to the anti-leakage base 4, the bottom end of the conical block is fixedly connected to the strip block, the surface of the strip block is fixedly connected to the cylindrical pin, the cylindrical pin is arranged in the slide groove, and is slidably connected to the movable plate 6 through the slide groove. When the movable plate 6 moves horizontally, it will slide between the slide groove and the cylindrical pin to make the support member 5 move vertically, and the support member 5 drives the anti-leakage base 4 to move synchronously.

[0050] When the bottom end of the molten salt heat storage tank body 3 needs to be repaired, the electric push rod 10 is adjusted, and the output end of the electric push rod 10 pushes the rack 8 below to move in the direction of the spur gear 9, and the rack 8 below will cause the spur gear 9 to rotate, and the spur gear 9 simultaneously causes the rack 8 above to move in the direction of the spur gear 9, so that the two sets of racks 8 move toward the middle at the same time, and the rack 8 drives the moving plate 6 to move through the connecting member 7, and the moving plate 6 slides between the slide groove and the cylindrical pin to make the support member 5 move vertically downward, and the support member 5 drives the anti-leakage base 4 to move synchronously, so that the anti-leakage base 4 is separated from the molten salt heat storage tank body 3, and a certain space is left, so that the bottom end of the molten salt heat storage tank body 3 can be repaired.

[0051] The molten salt heat storage tank anti-leakage device also includes: two groups of support plates 11; the two groups of support plates 11 are symmetrically arranged on both sides of the molten salt heat storage tank body 3, and the bottom ends of the support plates 11 are tightly fitted with the shell 1, which are used to support the molten salt heat storage tank body 3. When the anti-leakage base 4 is separated from the molten salt heat storage tank body 3, the molten salt heat storage tank body 3 is supported by the support plates 11.

[0052] The anti-leakage device for the molten salt heat storage tank also includes: two groups of telescopic parts 12; the two groups of telescopic parts 12 are symmetrically arranged on both sides of the anti-leakage base 4, and are fixedly connected to the anti-leakage base 4, the telescopic parts 12 are composed of a sleeve and a limit rod, the bottom end of the limit rod extends to the inside of the sleeve, and is slidably connected to the sleeve, and the bottom end of the sleeve is fixedly connected to the shell 1, which is used to limit the moving direction of the anti-leakage base 4.

[0053] A sealing ring 2 is provided between the molten salt heat storage tank body 3 and the through hole, and the sealing ring 2 is used for sealing so that the space between the molten salt heat storage tank body 3 and the shell 1 is sealed to ensure that the pressure remains unchanged.

[0054] Since the temperature of the molten salt inside the molten salt heat storage tank is relatively high, when a leak occurs, the temperature of the leak-proof base 4 will rise rapidly. When the temperature is too high, the leak-proof base 4 will melt, and the leak-proof base 4 cannot be cooled down when preventing a leak.

[0055] To solve the above problem, this embodiment proposes an implementation method, the molten salt heat storage tank anti-leakage device also includes: a cooling device; the cooling device is arranged on a side of the shell 1 away from the electric push rod 10, and is used to dissipate heat from the anti-leakage base 4.

[0056] In this embodiment, Figure 2 and 6 As shown, the cooling device includes: a cooling air duct 13, fan blades 14, a first motor 15 and a dust filter 16.

[0057] Specifically, one end of the cooling air duct 13 is connected to the interior of the shell 1, and the other end is connected to the outside; the fan blades 14 are arranged inside the cooling air duct 13; the output end of the first motor 15 is fixedly connected to the fan blades 14, and the model of the first motor 15 is selected according to actual needs and meets the working conditions, and is used to drive the fan blades 14 to rotate; the dust filter 16 is arranged inside the cooling air duct 13, and is located on the side away from the fan blades 14. The dust filter 16 can prevent dust in the outside air from entering the shell 1.

[0058] When heat dissipation is required, the first motor 15 is started, and the output end of the first motor 15 drives the fan blades 14 to rotate. The fan blades 14 will send external cold air into the shell 1 through the cooling air duct 13, and discharge the hot air through the machine door at the front end of the shell 1. At the same time, the dust filter 16 will block the dust in the air, thereby cooling the anti-leakage base 4 and preventing the anti-leakage base 4 from melting due to excessive temperature.

[0059] Since a large amount of molten salt is placed inside the molten salt heat storage tank, the side wall of the molten salt heat storage tank will also come into contact with the molten salt, and the existing anti-leakage device cannot protect against leakage generated by the side wall, making it inconvenient to use.

[0060] To solve the above problems, this embodiment proposes an implementation method, the molten salt heat storage tank anti-leakage device also includes: a side wall anti-leakage device; the side wall anti-leakage device is arranged above the interior of the shell 1, and is used to prevent the side wall of the molten salt heat storage tank body 3 from leaking.

[0061] In this embodiment, Figure 2 and 7 As shown, the side wall anti-leakage device includes: a threaded rod 18, a second motor 19, a connecting plate 20, a groove plate 22 and an anti-leakage ring 21.

[0062] Among them, the output end of the second motor 19 is fixedly connected to the top of the threaded rod 18. The model of the second motor 19 is selected according to actual needs and meets the working conditions. It is used to drive the threaded rod 18 to rotate; the connecting plate 20 is threadedly connected to the threaded rod 18 through a nut. When the threaded rod 18 rotates, the connecting plate 20 will move vertically; a slideway is provided on the surface of the groove plate 22, and a slider is provided in the slideway. The slider is fixedly connected to the connecting plate 20 to limit the connecting plate 20 to only vertical movement; an anti-leakage ring 21 is provided at one end of the connecting plate 20 away from the threaded rod 18 and is fixedly connected to the connecting plate 20. The anti-leakage ring 21 is sleeved on the surface of the molten salt heat storage tank body 3 to prevent the side wall of the molten salt heat storage tank body 3 from leaking. The connecting plate 20 can drive the anti-leakage ring 21 to move vertically. A second temperature sensor is installed on the surface of the anti-leakage ring 21, such as Figure 4 As shown, the specific location of the leak can be detected.

[0063] When the side wall of the molten salt heat storage tank body 3 leaks, the second motor 19 is started, and the output end of the second motor 19 drives the threaded rod 18 to rotate. The threaded rod 18 causes the connecting plate 20 to move vertically, and the connecting plate 20 simultaneously drives the anti-leakage ring 21 to move vertically slowly. When the anti-leakage ring 21 moves to the leaking place, the second temperature sensor can detect the temperature rise of the anti-leakage ring 21 itself, thereby determining the location of the leak and blocking the leak.

[0064] The anti-leakage device of the molten salt heat storage tank also includes: a pressure gauge 17; the pressure gauge 17 is arranged on the side of the shell 1 away from the cooling device, and is used to detect the pressure inside the shell 1.

[0065] Working principle:

[0066] When the molten salt heat storage tank anti-leakage device is in use, the molten salt heat storage tank body 3 passes through the sealing ring 2 at the through hole and stops after the support plate 11 contacts the shell 1. At this time, the anti-leakage base 4 will wrap the bottom end of the molten salt heat storage tank body 3. When the bottom end of the molten salt heat storage tank body 3 leaks, the anti-leakage base 4 will block the leak, and the first temperature sensor located below the anti-leakage base 4 will detect the increase in the temperature of the anti-leakage base 4 itself. At this time, it can be determined that the molten salt heat storage tank body 3 is leaking, and the first motor 15 is started at the same time. The output end of the first motor 15 drives the fan blades 14 to rotate. The fan blades 14 will send the external cold air into the shell 1 through the cooling air duct 13, and discharge the hot air through the machine door at the front end of the shell 1. At the same time, the dust filter 16 will block the dust in the air, so as to cool down the anti-leakage base 4 and prevent the anti-leakage base 4 from melting due to excessive temperature. When performing maintenance, adjust the electric push rod 10, and the output end of the electric push rod 10 pushes the rack 8 below to move in the direction of the spur gear 9. , the rack 8 below will rotate the spur gear 9, and the spur gear 9 will simultaneously move the rack 8 above toward the direction of the spur gear 9, so that the two sets of racks 8 move toward the middle at the same time, and the rack 8 drives the movable plate 6 to move through the connecting member 7, and the movable plate 6 will slide between the slide groove and the cylindrical pin to make the support member 5 move vertically downward, and the support member 5 drives the anti-leakage base 4 to move synchronously, so that the anti-leakage base 4 is separated from the molten salt heat storage tank body 3, and a certain space is left, so that the bottom end of the molten salt heat storage tank body 3 can be repaired. When the side wall leaks, the pressure gauge 17 will detect the increase in internal pressure. At this time, the second motor 19 is started, and the output end of the second motor 19 drives the threaded rod 18 to rotate. The threaded rod 18 will make the connecting plate 20 move vertically, and the connecting plate 20 will drive the anti-leakage ring 21 to move slowly vertically at the same time. When the anti-leakage ring 21 moves to the leaking place, the second temperature sensor can detect the temperature increase of the anti-leakage ring 21 itself, thereby determining the location of the leak, blocking the leak, and completing the use of this device.

[0067] Embodiment 2:

[0068] See also Figure 7 In this embodiment: a molten salt heat storage tank anti-leakage device, when multiple leaks occur on the side wall of the molten salt heat storage tank body 3, multiple sets of side wall anti-leakage devices can be set, and multiple anti-leakage rings 21 can be used to block the multiple leaks.

[0069] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A molten salt heat storage tank anti-leakage device, characterized in that: include: A shell (1), wherein a through hole is formed on the top of the shell (1); A molten salt heat storage tank body (3), the bottom end of which passes through the through hole and extends into the interior of the shell (1), and is used for storing molten salt; An anti-leakage base (4) is arranged at the bottom end of the molten salt heat storage tank body (3) and is closely fitted to the molten salt heat storage tank body (3) to prevent leakage from the bottom of the molten salt heat storage tank body (3); The disassembly device is arranged below the anti-leakage base (4) and is fixedly connected to the anti-leakage base (4), and is used to separate the anti-leakage base (4) from the molten salt heat storage tank body (3).

2. The molten salt heat storage tank anti-leakage device according to claim 1 is characterized in that: The disassembly device comprises: A spur gear (9) is arranged at the lower part of the housing (1); Two sets of racks (8) are symmetrically arranged along the center of the spur gear (9) and meshedly connected with the spur gear (9); An electric push rod (10), the output end of which is fixedly connected to an end of the rack (8) below close to the spur gear (9), and is used to push the rack (8) to move horizontally; Two groups of connecting members (7) are arranged on a side of the rack (8) away from the spur gear (9) and are fixedly connected to the spur gear (9); the connecting member (7) is composed of a vertical plate and a horizontal plate; the vertical plate is fixedly connected to the horizontal plate on a side away from the spur gear (9); Two groups of movable plates (6) are arranged at one end of the horizontal plate away from the vertical plate and are fixedly connected to the horizontal plate, and a sliding groove is provided on the surface of each group of movable plates (6); Two groups of support members (5), each group of support members (5) consists of a conical block, a strip block and a cylindrical pin, the top end of the conical block is fixedly connected to the anti-leakage base (4), the bottom end of the conical block is fixedly connected to the strip block, the surface of the strip block is fixedly connected to the cylindrical pin, the cylindrical pin is arranged in the slide groove, and is slidably connected to the movable plate (6) through the slide groove.

3. The molten salt heat storage tank anti-leakage device according to claim 1 is characterized in that: Also includes: Two groups of support plates (11); the two groups of support plates (11) are symmetrically arranged on both sides of the molten salt heat storage tank body (3), and the bottom ends of the support plates (11) are tightly fitted with the shell (1), so as to support the molten salt heat storage tank body (3).

4. The molten salt heat storage tank anti-leakage device according to claim 1 is characterized in that: Also includes: Two groups of telescopic parts (12); the two groups of telescopic parts (12) are symmetrically arranged on both sides of the anti-leakage base (4) and are fixedly connected to the anti-leakage base (4); the telescopic parts (12) are composed of a sleeve and a limit rod; the bottom end of the limit rod extends to the inside of the sleeve and is slidably connected to the sleeve; the bottom end of the sleeve is fixedly connected to the shell (1) to limit the moving direction of the anti-leakage base (4).

5. The molten salt heat storage tank anti-leakage device according to claim 1 is characterized in that: A sealing ring (2) is provided between the molten salt heat storage tank body (3) and the through hole, and the sealing ring (2) is used for sealing.

6. The molten salt heat storage tank anti-leakage device according to claim 2 is characterized in that: Also includes: A cooling device; the cooling device is arranged on a side of the housing (1) away from the electric push rod (10) and is used to dissipate heat from the anti-leakage base (4).

7. The molten salt heat storage tank anti-leakage device according to claim 6 is characterized in that: The cooling device comprises: A cooling air duct (13), one end of the cooling air duct (13) being connected to the interior of the shell (1), and the other end of the cooling air duct (13) being connected to the outside; A fan blade (14) is arranged inside the cooling air duct (13); A first motor (15), wherein an output end of the first motor (15) is fixedly connected to the fan blade (14) and is used to drive the fan blade (14) to rotate; The dustproof filter (16) is arranged inside the cooling air duct (13) and is located on a side away from the fan blades (14).

8. The molten salt heat storage tank anti-leakage device according to claim 1 is characterized in that: Also includes: Side wall anti-leakage device; the side wall anti-leakage device is arranged above the interior of the shell (1) and is used to prevent leakage of the side wall of the molten salt heat storage tank body (3).

9. The molten salt heat storage tank anti-leakage device according to claim 8, characterized in that: The side wall anti-leakage device comprises: Threaded rod (18); a second motor (19), wherein an output end of the second motor (19) is fixedly connected to a top end of the threaded rod (18) and is used to drive the threaded rod (18) to rotate; A connecting plate (20), wherein the connecting plate (20) is threadedly connected to the threaded rod (18) via a nut; A groove plate (22), wherein a slideway is provided on the surface of the groove plate (22), and a slider is provided in the slideway, and the slider is fixedly connected to the connecting plate (20) and is used to limit the connecting plate (20) to only move vertically; An anti-leakage ring (21) is arranged at one end of the connecting plate (20) away from the threaded rod (18) and is fixedly connected to the connecting plate (20). The anti-leakage ring (21) is sleeved on the surface of the molten salt heat storage tank body (3) to prevent leakage of the side wall of the molten salt heat storage tank body (3).

10. The molten salt heat storage tank anti-leakage device according to claim 6, characterized in that: Also includes: A pressure gauge (17); the pressure gauge (17) is arranged on a side of the shell (1) away from the cooling device, and is used to detect the pressure inside the shell (1).

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