Molten salt heat storage device for thermal power plant and operation method of molten salt heat storage device

Abstract

The invention belongs to the technical field of fused salt heat storage, and discloses a fused salt heat storage device for a thermal power plant and an operation method of the fused salt heat storage device. According to the fused salt heat storage device for the thermal power plant, a mounting frame is mounted on a supporting plate, a sliding groove is formed in the mounting frame, a connecting plate is arranged in the sliding groove in a sliding mode, and a mounting frame is mounted on the connecting plate; a shell is arranged in the mounting frame through a fixing rod, a stirring rod is arranged in the shell, and a driving assembly used for driving the stirring rod is mounted on the mounting frame; a buffer assembly is further mounted on the mounting frame; moving wheels are installed at the bottom of the supporting plate, and a positioning assembly is arranged on one side of each moving wheel. A protection assembly is installed at the bottom of the connecting plate. An elastic component is arranged in the sliding groove. According to the technical scheme, the defects of mobility and stability of an existing storage tank are overcome, the use flexibility and reliability of the fused salt heat storage device can be improved, and the actual application requirements of multiple scenes can be better met.

Description

Technical Field

[0001] The present invention belongs to the technical field of molten salt heat storage, and particularly relates to a molten salt heat storage device for a thermal power plant and an operation method thereof. Background Art

[0002] Under the background of the current energy structure transformation, we are actively promoting the "coal-to-electricity" project, advocating the use of electric heating to replace traditional coal-fired boilers to reduce environmental pollution and improve energy utilization efficiency. Due to the obvious peak-valley differences in power supply and demand day and night, in order to balance the power grid load, the government has introduced preferential policies for low-valley electricity consumption at night. This policy encourages the use of cheap low-valley electricity at night to heat heat storage materials, such as molten salt, for heat energy storage to achieve the purpose of "peak shaving and valley filling".

[0003] The electric heat storage device is a key equipment in the above strategy. It uses electric energy to heat the heat storage medium during the low-valley period at night, and then the medium transfers the heat to hot water through the heat exchange tube for use during the day; among them, molten salt is widely used as a heat storage medium due to its good heat storage performance, and the heat storage device usually adopts a storage tank with an adiabatic and heat-insulating structure to reduce heat loss.

[0004] There are still some deficiencies in the design and application of the molten salt heat storage tanks in the prior art, including: on the one hand, the movement or relocation of the existing storage tanks is relatively troublesome, which limits their flexibility and applicability in different scenarios; on the other hand, the storage tanks are easily affected by external vibrations during the working process, and these vibrations may cause the instability of the tank structure, thereby affecting its normal heat storage and heat release functions; furthermore, the stability problem of the storage tank not only concerns the service life of the equipment, but also may have a negative impact on the efficiency of heat energy storage and conversion. Summary of the Invention

[0005] The purpose of the present invention is to provide a molten salt heat storage device for a thermal power plant and an operation method thereof to solve one or more of the above existing technical problems. The technical solution disclosed by the present invention solves the problems and defects existing in the mobility and stability of the existing storage tanks, can improve the use flexibility and reliability of the molten salt heat storage device, and can better meet the actual application requirements of multiple scenarios.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: The present invention provides a molten salt heat storage device for a thermal power plant, including: a support plate, a mounting frame, a mounting frame and a housing; wherein, The mounting bracket is installed on the support plate; a sliding groove is formed on the side wall of the mounting bracket, a connecting plate is slidably arranged in the sliding groove, and the mounting frame is installed at one end of the connecting plate away from the sliding groove; the housing is arranged in the mounting frame through a fixing rod, a stirring rod is arranged in the housing, and a driving component for driving the stirring rod is installed on the mounting frame; Wherein, a buffer component is further installed on the mounting bracket, and one end of the buffer component away from the mounting bracket is connected to the mounting frame; a connecting groove is formed on the support plate, connecting blocks are symmetrically and slidably arranged in the connecting groove, a buffer rod is hinged to the bottom of the mounting frame, and one end of the buffer rod away from the mounting frame is hinged to the connecting block, and an elastic unit is arranged between the connecting blocks; a moving wheel is installed at the bottom of the support plate, and a positioning component is arranged on one side of the moving wheel; a protection component is installed at the bottom of the connecting plate, and one end of the protection component away from the connecting plate is connected to the support plate; an elastic component is arranged in the sliding groove, one end of the elastic component is connected to the bottom of the connecting plate, and the other end of the elastic component is connected to the inner wall of the sliding groove.

[0007] A further improvement of the technical solution of the present invention lies in that the mounting bracket includes: two frame supports installed on the support plate and a top rod cross beam arranged on the two frame supports; Wherein, the sliding groove is formed on the frame support; a buffer groove is formed on the top rod cross beam, and the buffer component is arranged in the buffer groove.

[0008] A further improvement of the technical solution of the present invention lies in that the buffer component includes: a buffer block, an elastic member and a pull rod; Wherein, the buffer blocks are symmetrically and slidably installed in the buffer groove, the pull rod is hinged to the buffer block, and one end of the pull rod away from the buffer block is hinged to the mounting frame; an elastic member is connected to one side of the buffer block, and the other end of the elastic member away from the buffer block is connected to the side wall of the buffer groove.

[0009] A further improvement of the technical solution of the present invention lies in that the number of the buffer grooves is two, and they are symmetrically arranged above the mounting frame.

[0010] A further improvement of the technical solution of the present invention lies in that the positioning component includes: a telescopic member and a positioning plate; Wherein, one end of the telescopic member is connected to the support plate, and the other end of the telescopic member is connected with the positioning plate.

[0011] A further improvement of the technical solution of the present invention lies in that the telescopic member is an electric telescopic rod or an electric push rod.

[0012] A further improvement of the technical solution of the present invention lies in that the driving assembly includes: a driving member and a driving shaft; Wherein, the driving member is installed on the installation frame, and the driving shaft is provided at the output end of the driving member; one end of the driving shaft away from the driving member penetrates through the installation frame and the housing, and the driving shaft is rotationally connected to the installation frame and the housing; a driven shaft is rotationally connected to the side wall of the housing, one end of the driven shaft away from the side wall of the housing is connected with a connecting unit, and one end of the connecting unit away from the driven shaft is connected with the driving shaft.

[0013] A further improvement of the technical solution of the present invention lies in that the driving member is a stepping motor or a servo motor.

[0014] A further improvement of the technical solution of the present invention lies in that the protection assembly includes: a buffer chamber, a pressing plate and a pressing rod; Wherein, the buffer chamber is installed on the support plate, the pressing plate is slidably arranged in the buffer chamber, and through holes are formed in the pressing plate; the pressing rod is installed on the pressing plate, and one end of the pressing rod away from the pressing plate is connected with the connecting plate; hydraulic oil is filled in the buffer chamber.

[0015] The present invention also provides an operation method for a molten salt heat storage device for a thermal power plant, including: When heating the molten salt in the housing, the molten salt heat storage device for the thermal power plant is positioned and supported by the positioning assembly, and the stirring rod is driven to rotate by the driving assembly, and the stirring rod stirs the molten salt in the housing, so that the molten salt is heated evenly; When the molten salt heat storage device for the thermal power plant is transferred, the movement of the molten salt heat storage device for the thermal power plant is realized through the moving wheels; wherein, during the heating or moving process, when encountering vibration, the buffer rod compresses the elastic unit, the connecting plate compresses the elastic component, the buffer assembly buffers the force on the installation frame, and the protection assembly buffers the force on the connecting plate, and the impact force generated by the vibration is buffered in stages.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In view of the problems and defects in the mobility and stability of existing molten salt thermal energy storage devices, the present invention specifically discloses a new type of molten salt thermal energy storage device for thermal power plants, which improves the flexibility, convenience, and scenario adaptability of use. Further explanatory, the technical solution of the present invention designs multiple-level buffering means, which can better cope with the impact force generated by vibration during the movement and operation of the molten salt thermal energy storage device; among them, the cooperation design of the chute and the connecting plate enables the installation frame to move within a certain range, forming a primary buffer; the buffer assembly on the mounting frame is connected to the installation frame. When the device is vibrated, the buffer assembly can absorb part of the impact force, reduce the impact of vibration on the housing, improve the stability of the device, and form another primary buffer; the design of the buffer groove and the buffer block, as well as the use of elastic members, make the buffering effect more significant; the design of the protection assembly provides additional support and buffering for the connecting plate, and also reduces the impact of vibration on the overall device. Summarizing, the technical solution of the present invention significantly improves the mobility and stability of the molten salt thermal energy storage device for thermal power plants through multiple new technical means. The device is more flexible and stable during use, and at the same time improves the heating efficiency of the molten salt, providing strong support for the energy conservation, consumption reduction, and efficient operation of thermal power plants.

[0017] The present invention further discloses the operation method of the device, gives clear operation steps, and clarifies the working principle of the device. The operation is simple and convenient, and the scenario adaptability is relatively strong; among them, steps such as positioning and supporting through the positioning component, driving the stirring rod to rotate through the driving component, realizing the movement of the device through the moving wheel, and buffering the impact force generated by vibration through various buffering means enable the device to work more flexibly and stably during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art; obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of a molten salt thermal energy storage device for a thermal power plant in an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a connection unit in an embodiment of the present invention; Figure 3 It is a schematic connection structure diagram of a stirring rod and a driven shaft in an embodiment of the present invention; Figure 4 For Figure 1 A partial enlarged schematic diagram of part A in the shown embodiment; The explanations of the reference numerals in the drawings are as follows: 1. Support plate; 2. Telescopic member; 3. Movable wheel; 4. Positioning plate; 5. Mounting bracket; 6. Chute; 7. Connecting plate; 8. Elastic member; 9. Buffer groove; 10. Buffer block; 11. Elastic element; 12. Pull rod; 13. Driving member; 15. Mounting frame; 16. Housing; 17. Fixed rod; 18. Driving shaft; 19. Connecting unit; 20. Driven shaft; 21. Stirring rod; 22. Buffer rod; 23. Connecting block; 24. Elastic unit; 25. Pressing rod; 26. Buffer chamber; 27. Pressing plate; 28. Hydraulic oil. Detailed implementation manner

[0020] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiment technical solutions are part of the embodiments of the present invention, not all of the embodiments.

[0021] Based on the technical solutions disclosed in the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0022] Please refer to Figures 1 to 4, as an embodiment of the present invention, a molten salt heat storage device for a thermal power plant includes a support plate 1. An installation frame 5 is installed on the support plate 1. A chute 6 is formed on the side wall of the installation frame 5. A connecting plate 7 is slidably installed in the chute 6. One end of the connecting plate 7 away from the chute 6 is installed with an installation frame 15. A fixing rod 17 is installed in the installation frame 15. One end of the fixing rod 17 away from the installation frame 15 is connected to a housing 16. A stirring rod 21 is arranged in the housing 16. A buffer assembly is installed on the installation frame 5. One end of the buffer assembly away from the installation frame 5 is connected to the installation frame 15. A buffer rod 22 is hinged to the bottom of the installation frame 15. A connecting groove is formed on the support plate 1. Connecting blocks 23 are symmetrically and slidably installed in the connecting groove. One end of the buffer rod 22 away from the installation frame 15 is hinged to the connecting block 23. An elastic unit 24 is arranged between the connecting blocks 23. The elastic unit 24 is used to connect adjacent connecting blocks 23. Moving wheels 3 are installed at the bottom of the support plate 1. A positioning assembly is arranged on one side of the moving wheels 3. The positioning assembly includes a telescopic member 2. One end of the telescopic member 2 is connected to the support plate 1, and the other end is connected to a positioning plate 4. A driving assembly is installed on the installation frame 15. The stirring rod 21 is connected to the driving assembly. The driving assembly includes a driving member 13. The driving member 13 is installed on the installation frame 15. The output end of the driving member 13 is installed with a driving shaft 18. One end of the driving shaft 18 away from the driving member 13 penetrates through the installation frame 15 and the housing 16, and the driving shaft 18 is rotatably connected to the installation frame 15 and the housing 16. A driven shaft 20 is rotatably connected to the side wall of the housing 16. One end of the driven shaft 20 away from the side wall of the housing 16 is connected to a connecting unit 19. One end of the connecting unit 19 away from the driven shaft 20 is connected to the driving shaft 18; A protective assembly is installed at the bottom of the connecting plate 7. The protective assembly includes a buffer cavity 26. The buffer cavity 26 is installed on the support plate 1. A pressing plate 27 is slidably arranged in the buffer cavity 26. Through holes are formed on the pressing plate 27. A pressing rod 25 is installed on the pressing plate 27. One end of the pressing rod 25 away from the pressing plate 27 is connected to the connecting plate 7. Hydraulic oil 28 is placed in the buffer cavity 26; An elastic member 8 is installed at the bottom of the connecting plate 7. One end of the elastic member 8 away from the connecting plate 7 is connected to the chute 6.

[0023] In the embodiment of the present invention, during the use of the molten salt heat storage device for a thermal power plant, When it is necessary to heat the molten salt in the housing 16, the set driving member 13 drives the connected driving shaft 18 to rotate. The rotation of the driving shaft 18 drives the driven shaft 20 to rotate through the connecting unit 19. The rotation of the driven shaft 20 drives the connected stirring rod 21 to rotate. The rotation of the stirring rod 21 stirs the molten salt in the housing 16, so that the molten salt is heated evenly, improving the heating efficiency of the molten salt; When transferring the device, when encountering a bumpy road surface during the transfer or when vibrations occur during the working process, the buffer rod 22 provided will further compress the elastic unit 24 under the action of pressure. At the same time, the elastic component 8 provided will be further compressed by the connecting plate 7, so as to buffer the impact force generated by the vibration and play a buffer protection role for the provided housing 16. When the connecting plate 7 moves downward, it will drive the pressing plate 27 at one end of the pressing rod 25 to press the hydraulic oil 28 in the buffer chamber 26. The hydraulic oil 28 will overflow from one side of the pressing plate 27 through the through hole. When the pressing plate 27 resets, the hydraulic oil 28 will fall into the buffer chamber 26 at the bottom through the through hole. During the vibration of the installation frame 15, the provided buffer assembly can further buffer the impact force generated by the vibration. When the device moves to the required position, the installed telescopic member 2 drives the positioning plate 4 connected thereto to contact the ground, thereby improving the stability of the device.

[0024] In a specific embodiment of the present invention, the telescopic member 2 may be an electric telescopic rod or an electric push rod, etc., and no specific description is made here. The driving member 13 may be a stepping motor or a servo motor, etc., and no specific description is made here. The connecting unit 19 may be a gear set or the cooperation of a worm and a worm gear, etc., and no specific description is made here. An exemplary technical solution is as Figure 4 shown.

[0025] As an embodiment of the present invention, in the buffer assembly, buffer blocks 10 are symmetrically and slidably installed in the buffer groove 9. A pull rod 12 is hinged on the buffer block 10. One end of the pull rod 12 away from the buffer block 10 is hinged to the installation frame 15. One side of the buffer block 10 is connected with an elastic member 11. One end of the elastic member 11 away from the buffer block 10 is connected to the side wall of the buffer groove 9. In a further preferred technical solution, two of the above buffer assemblies can be designed and symmetrically arranged above the installation frame 15.

[0026] In an embodiment of the present invention, when the device vibrates during operation or movement, the impact force generated by the vibration will drive the pull rod 12 to pull the buffer block 10 at one end. The buffer block 10 will stretch the elastic member 11 on one side. The elastic member 11 is stretched, which can further buffer the impact force generated by the vibration and play a further buffer protection role for the housing 16 arranged in the installation frame 15, further improving the practicability of the device.

[0027] Example Summarily, in the above embodiments of the present invention, in view of the existing problems of insufficient mobility and stability of the molten salt thermal energy storage device for thermal power plants, a novel molten salt thermal energy storage device for thermal power plants is provided. Specifically, the structural designs of the support plate, mounting frame, mounting frame and housing are disclosed, which can be relatively easily moved or adjusted in position, improving the flexibility of the device. The cooperative design of the chute and the connecting plate enables the mounting frame to slide within a certain range, which can play a certain role in buffering the impact force. The buffer assembly on the mounting frame is connected to the mounting frame. When the device is vibrated, the buffer assembly can absorb part of the impact force, reducing the influence of vibration on the housing and improving the stability of the device. Among them, the design of the buffer groove and the buffer block, as well as the use of elastic members, make the buffering effect more significant. The connecting groove on the support plate, the slidably arranged connecting block, and the hinged buffer rod form an additional buffer system, further reducing the transmission of vibration to the housing. Among them, the use of elastic units such as springs enhances the buffering effect, making the device more stable when vibrated. The use of moving wheels enables the device to be easily moved, improving the portability of the device. The design of the positioning assembly (such as the electric telescopic rod and the positioning plate) enables the device to be stably positioned at the designated position when needed, preventing movement or shaking. The design of the protection assembly (including the buffer cavity, the pressing plate and the pressing rod) provides additional support and buffering for the connecting plate, further reducing the influence of vibration on the device. The use of hydraulic oil enables the protection assembly to more effectively absorb and disperse energy when subjected to impact force. The driving of the driving assembly (such as the stepping motor and the driving shaft) enables the stirring rod to rotate, uniformly stirring the molten salt in the housing and improving the heating efficiency of the molten salt. Among them, the design of the driven shaft and the connecting unit makes the rotation of the stirring rod more stable and reliable.

[0028] In summary, the embodiments of the present invention specifically disclose a molten salt heat storage device for a thermal power plant, which includes a support plate, a buffer assembly, a positioning assembly, a connecting block, a buffer rod, an elastic member, an elastic element, and an elastic unit. During heating, the driving assembly drives the stirring rod to rotate to stir the molten salt in the housing, so that the molten salt is evenly heated. During the transfer process, the buffer rod provided will further compress the elastic unit under the action of pressure, and at the same time, the elastic member provided will be further compressed by the connecting plate, so as to buffer the impact force generated by vibration and play a buffer protection role for the provided housing. In addition, when the connecting plate moves downward, it will drive the pressing plate at one end of the pressing rod to press the hydraulic oil in the buffer chamber. The hydraulic oil will overflow from one side of the pressing plate through the through hole when it is squeezed. When the pressing plate returns to its original position, the hydraulic oil will fall into the buffer chamber at the bottom through the through hole. During the vibration of the installation frame, the buffer assembly provided can further buffer the impact force generated by vibration. Therefore, the novel technical solution disclosed in the embodiments of the present invention solves the problems and defects existing in the mobility and stability of the existing storage tanks, improves the use flexibility and reliability of the molten salt heat storage device, and can better meet the actual application requirements of multiple scenarios.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference numerals in the claims should not be regarded as limiting the claimed rights. In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A molten salt thermal energy storage device for a thermal power plant, characterized in that, Comprising: A support plate (1), a mounting bracket (5), a mounting frame (15), and a housing (16); wherein, The mounting bracket (5) is mounted on the support plate (1); a chute (6) is formed on the side wall of the mounting bracket (5), a connecting plate (7) is slidably disposed in the chute (6), and the mounting frame (15) is mounted at one end of the connecting plate (7) away from the chute (6); the housing (16) is disposed in the mounting frame (15) through a fixing rod (17), a stirring rod (21) is disposed in the housing (16), and a driving assembly for driving the stirring rod (21) is mounted on the mounting frame (15); Wherein, a buffer assembly is further mounted on the mounting bracket (5), and one end of the buffer assembly away from the mounting bracket (5) is connected to the mounting frame (15); a connecting groove is formed on the support plate (1), connecting blocks (23) are symmetrically and slidably disposed in the connecting groove, a buffer rod (22) is hinged to the bottom of the mounting frame (15), one end of the buffer rod (22) away from the mounting frame (15) is hinged to the connecting block (23), and an elastic unit (24) is disposed between the connecting blocks (23); a moving wheel (3) is mounted at the bottom of the support plate (1), and a positioning assembly is disposed on one side of the moving wheel (3); a protection assembly is mounted at the bottom of the connecting plate (7), and one end of the protection assembly away from the connecting plate (7) is connected to the support plate (1); an elastic member (8) is disposed in the chute (6), one end of the elastic member (8) is connected to the bottom of the connecting plate (7), and the other end of the elastic member (8) is connected to the inner wall of the chute (6).

2. The molten salt heat storage device for a thermal power plant according to claim 1, characterized in that, The mounting bracket (5) includes: two frame supports mounted on the support plate (1) and a top rod cross beam disposed on the two frame supports; Wherein, the chute (6) is formed on the frame support; a buffer groove (9) is formed on the top rod cross beam, and the buffer assembly is disposed in the buffer groove (9).

3. A molten salt thermal energy storage device for a thermal power plant according to claim 2, wherein, The buffer assembly includes: a buffer block (10), an elastic member (11), and a pull rod (12); Wherein, the buffer blocks (10) are symmetrically and slidably mounted in the buffer groove (9), the pull rod (12) is hinged to the buffer block (10), and one end of the pull rod (12) away from the buffer block (10) is hinged to the mounting frame (15); one side of the buffer block (10) is connected to the elastic member (11), and the other end of the elastic member (11) away from the buffer block (10) is connected to the side wall of the buffer groove (9).

4. A molten salt heat storage device for a thermal power plant according to claim 2, wherein The number of the buffer grooves (9) is two, and they are symmetrically disposed above the mounting frame (15).

5. A molten salt heat storage device for a thermal power plant according to claim 1, characterized in that, The positioning assembly includes: a telescopic member (2) and a positioning plate (4); Wherein, one end of the telescopic member (2) is connected to the support plate (1), and the other end of the telescopic member (2) is connected to the positioning plate (4).

6. The molten salt thermal energy storage device for thermal power plants according to claim 5, wherein, The telescopic member (2) is an electric telescopic rod or an electric push rod.

7. A molten salt thermal energy storage device for a thermal power plant according to claim 1, characterized in that, The driving assembly includes: a driving member (13) and a driving shaft (18); Among them, the driving member (13) is installed on the installation frame (15), and a driving shaft (18) is provided at the output end of the driving member (13); one end of the driving shaft (18) away from the driving member (13) penetrates through the installation frame (15) and the housing (16), and the driving shaft (18) is rotatably connected to the installation frame (15) and the housing (16); a driven shaft (20) is rotatably connected to the side wall of the housing (16), a connecting unit (19) is connected to one end of the driven shaft (20) away from the side wall of the housing (16), and one end of the connecting unit (19) away from the driven shaft (20) is connected to the driving shaft (18).

8. A molten salt thermal energy storage device for a thermal power plant according to claim 7, characterized in that, The driving member (13) is a stepping motor or a servo motor.

9. A molten salt heat storage device for a thermal power plant according to claim 1, characterized in that, The protection component includes: a buffer chamber (26), a pressing plate (27) and a pressing rod (25); Among them, the buffer chamber (26) is installed on the support plate (1), the pressing plate (27) is slidably arranged in the buffer chamber (26), and through holes are formed in the pressing plate (27); the pressing rod (25) is installed on the pressing plate (27), and one end of the pressing rod (25) away from the pressing plate (27) is connected to the connecting plate (7); the buffer chamber (26) is filled with hydraulic oil (28).

10. A method for operating a molten salt thermal energy storage device for a thermal power plant according to claim 1, characterized in that, Including: When heating the molten salt in the housing (16), the molten salt heat storage device for thermal power plants is positioned and supported by the positioning component, and the stirring rod (21) is driven to rotate by the driving component, and the stirring rod (21) stirs the molten salt in the housing (16) to make the molten salt evenly heated; When the molten salt heat storage device for thermal power plants is transferred, the movement of the molten salt heat storage device for thermal power plants is realized through the moving wheels (3); Among them, during the heating or moving process, when encountering vibration, the buffer rod (22) compresses the elastic unit (24), the connecting plate (7) compresses the elastic component (8), the buffer component buffers the force on the installation frame (15), and the protection component buffers the force on the connecting plate (7) to hierarchically buffer the impact force generated by the vibration.

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