Modularized high-temperature sealed sandbox heat storage device

Abstract

The invention relates to the technical field of sandbox heat storage, in particular to a modular high-temperature sealed sandbox heat storage device which comprises a bottom plate, a fixing frame is fixedly connected to the top end of the bottom plate, a steam heat exchange pipe, a heat release pipe and a liquid return pipe are fixedly connected to the fixing frame in a penetrating mode, and a heat storage sandbox is arranged on the bottom plate. The heat storage sand box is arranged in a modularized mode, flexible disassembly and assembly can be carried out according to actual requirements, equipment does not need to be integrally replaced, the capacity expansion cost is greatly reduced, each module can independently operate and maintain due to the modularized design, the heat storage sand box is convenient to assemble and disassemble, and the heat storage sand box is convenient to use. When a certain module breaks down, the heat storage sand box can be independently shut down for maintenance, normal operation of other modules is not affected, and through the arrangement of the installation mechanism, the fixing mechanism and other structures, the independent heat storage sand box can be rapidly installed only by rotating two bolts, and sealing communication with a corresponding pipeline is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of sandbox heat storage, and in particular to a modular high-temperature sealed sandbox heat storage device. Background Art

[0002] The modular high-temperature sealed sandbox heat storage device is a device used to store and manage heat. It is usually used for thermal energy storage in high-temperature environments. It stores heat through a high-temperature medium (such as sand or molten salt) in the sandbox and uses a modular design to achieve flexible heat management. This device has high-temperature sealing performance and can effectively prevent heat loss. At the same time, it can achieve flexible expansion and maintenance through a modular structure.

[0003] However, most existing sandbox heat storage devices are integrated structures, and this design has many limitations in practical applications. First, it is difficult to expand the capacity of the integrated sandbox heat storage device. When the heat storage capacity needs to be increased, it is usually only possible to replace the entire device or add new heat storage equipment. This is not only costly, but also complex to construct, requiring a lot of time and manpower. In addition, this design lacks flexibility and is difficult to dynamically adjust according to actual needs, and cannot adapt to changes in heat storage needs in different scenarios.

[0004] Secondly, the integrated heat storage device also has obvious deficiencies in adjusting the heat storage efficiency. In some areas with low heat storage efficiency, such as cloudy days or areas with short sunshine hours, it is impossible to flexibly reduce the use of heat storage medium, resulting in energy waste. The current solution is usually to reduce the amount of heat storage medium by extracting molten salt, but this method is complicated to operate and may affect the stability and safety of the heat storage system.

[0005] Furthermore, the maintenance and repair of integrated heat storage devices is rather cumbersome. Once a part fails, the entire system may need to be shut down for repair, which not only affects the normal operation of the system but also increases maintenance costs.

[0006] Therefore, a modular high-temperature sealed sandbox heat storage device is proposed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the background technology and propose a modular high-temperature sealed sand box heat storage device.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is: a modular high-temperature sealed sand box heat storage device, comprising a bottom plate, a fixing frame fixedly connected to the top of the bottom plate, a steam heat exchange pipe, a heat release pipe and a return liquid pipe respectively passed through and fixedly connected to the fixing frame, a heat storage sand box is provided on the bottom plate, a plurality of branch pipes are fixedly connected to the outer walls of the steam heat exchange pipe, the heat release pipe and the return liquid pipe at equal distances, a fixing frame is fixedly connected to the side wall of the heat storage sand box, a fixed pipe is passed through and fixedly connected to the inner side of the fixing frame relative to the position next to the branch pipe, three circular hole plates are connected to the inner side of the fixing frame with transverse sliding connection, a bellows is fixedly connected between the side walls of the three circular hole plates and the side ends of the fixed pipes, a conical sealing ring is fixedly connected to the side of the circular hole plate away from the bellows, an installation mechanism for driving the conical sealing ring to move is provided in the fixing frame, and a fixing mechanism for fixing the position of the heat storage sand box is also provided.

[0009] In the above technical solution, further, the steam heat exchange tube is connected to the external heat collection unit, the heat release tube is connected to the inlet of the external circulation conversion radiator, the return liquid tube is connected to the outlet of the external circulation conversion radiator, and one of the fixed tubes located next to the steam heat exchange tube is connected to the heat exchange tube in the heat storage sand box, and the side ends of the other two fixed tubes are both passed through and fixedly connected to the inside of the heat storage sand box.

[0010] In the above technical solution, further, the conical sealing ring is made of high-temperature resistant rubber material, and the bellows is made of high-temperature resistant metal material.

[0011] In the above technical solution, further, the mounting mechanism includes bolts, a pair of bolts are provided, and the bolts are threaded through and connected to the top of the fixed frame, the inner side of the fixed frame is longitudinally slidably connected with a top plate, both sides of the outer wall of the circular hole plate are fixedly connected with upper right-angle blocks with inclined surfaces, the bottom end of the top plate is fixedly connected with an upper extrusion block relative to the bottom end of the upper right-angle block, and the bottom end of the upper extrusion block is inclined, and the inclined surface of the upper extrusion block is fitted with the inclined surface of the upper right-angle block, and an upper spring is fixedly connected between the inner side of the fixed frame and the side wall of the circular hole plate.

[0012] In the above technical solution, further, four slots are provided at the top and the bottom plate of the heat storage sand box, the bottom of the heat storage sand box is fixedly connected with an insert inserted into the slots, and buckle grooves are provided on both sides of the outer wall of the heat storage sand box.

[0013] In the above technical solution, further, the branch pipes on the steam heat exchange pipe and the return liquid pipe are fixedly connected with push-type valves, and the pressing positions of the push-type valves are set on the side close to each other, and the branch pipes on the heat release pipe are fixedly connected with a one-way valve.

[0014] In the above technical solution, further, the side wall of the fixed frame is fixedly connected with an inspection plate, the side wall of the inspection plate is provided with a circular groove relative to the position next to the conical sealing ring, and the side wall of the inspection plate is provided with a sliding groove, the side wall of the top plate is fixedly connected with a connecting rod relative to the sliding groove, the bottom end of the connecting rod is fixedly connected with a valve opening block, and extrusion grooves are inclined on both sides of the outer wall of the valve opening block.

[0015] In the above technical solution, further, the fixing mechanism includes a T-shaped block, a pair of T-shaped blocks are provided, and the T-shaped blocks are both slidably connected to the front and rear sides of the fixed frame, the side of the T-shaped block close to each other is fixedly connected to a lower right-angle block with an inclined surface, a pair of lower springs are fixedly connected between the side walls of the T-shaped block and the inner side of the fixed frame, and a plurality of fixing holes are opened on the inner side of the fixing frame at equal distances from the position next to the T-shaped block, and the T-shaped block is inserted into one of the pair of fixing holes.

[0016] In the above technical solution, further, lower extrusion rods are fixedly connected to both sides of the bottom end of the top plate, and the bottom ends of the lower extrusion rods are configured as smooth arc surfaces.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention modularizes the heat storage sand box, which can be flexibly disassembled and assembled according to actual needs without replacing the entire equipment, greatly reducing the expansion cost. Moreover, the modular design allows each module to be operated and maintained independently. When a module fails, it can be shut down for maintenance without affecting the normal operation of other modules. In addition, through the setting of structures such as the installation mechanism and the fixing mechanism, a separate heat storage sand box can be quickly installed and sealed with the corresponding pipeline by simply rotating two bolts.

[0019] 2. The present invention adopts the arrangement of structures such as the valve block and the push-type valve. After rotating two bolts to connect the pipes on the heat storage sand box with the reserved branch pipes, the push-type valves on both sides are automatically pressed to release the blockage of the pipes, thereby realizing the rapid connection between the steam heat exchange pipe and the heat release pipe and the heat storage sand box, further improving the convenience of the device, and eliminating the need for workers to manually open the valves after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front three-dimensional structure of the sandbox heat storage device of the present invention;

[0021] Figure 2 It is a schematic diagram of the side three-dimensional structure of the sandbox heat storage device of the present invention;

[0022] Figure 3 The appended Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 4 It is a schematic diagram of the side three-dimensional structure of the bottom plate and the fixing frame of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the heat storage sand box of the present invention when viewed from above;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the fixed frame and the access panel separated from each other in the present invention;

[0026] Figure 7 The appended Figure 6 A schematic diagram of the partially enlarged structure at point B in the middle;

[0027] Figure 8 This is a bottom-up schematic diagram of the top plate, circular hole plate and fixed tube of the present invention;

[0028] Figure 9 It is a schematic diagram of the three-dimensional structure of the top plate and the circular hole plate separated according to the present invention.

[0029] In the figure: 1. Bottom plate; 2. Fixing frame; 3. Steam heat exchange tube; 4. Heat release tube; 5. Liquid return tube; 6. Heat storage sand box; 7. Slot; 8. Insert block; 9. Fixing frame; 10. Fixing tube; 11. Circular hole plate; 12. Bellows; 13. Conical sealing ring; 14. Bolt; 15. Top plate; 16. Upper right-angle block; 17. Upper extrusion block; 18. Upper spring; 19. Branch pipe; 20. Buckle groove; 21. Push-type valve; 22. One-way valve; 23. Inspection plate; 24. Slide; 25. Connecting rod; 26. Valve opening block; 27. Extrusion groove; 28. T-block; 29. ​​Lower right-angle block; 30. Lower spring; 31. Fixing hole; 32. Lower extrusion rod; 33. Circular groove. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] However, it was found in actual use that most of the existing sandbox heat storage devices are integrated structures. This design has many limitations in practical applications. First, it is difficult to expand the capacity of the integrated sandbox heat storage device. When the heat storage capacity needs to be increased, it is usually only possible to replace the entire device or add a new heat storage device. This is not only costly, but also complex to construct, requiring a lot of time and manpower. In addition, this design lacks flexibility and is difficult to dynamically adjust according to actual needs. It cannot adapt to changes in heat storage needs in different scenarios. In order to solve the above problems, the following structure is specially invented.

[0033] like Figures 1-9 The modular high-temperature sealed sandbox heat storage device shown in the figure includes a bottom plate 1, a fixing frame 2 is fixedly connected to the top of the bottom plate 1, and a steam heat exchange pipe 3, a heat release pipe 4 and a return liquid pipe 5 are respectively fixedly connected to the fixing frame 2, and a heat storage sandbox 6 is provided on the bottom plate 1 (it should be noted that the heat storage sandbox 6 is mainly composed of a sandbox body, an insulation layer, a sensor, a heater and a pressure relief device, and the internal heat storage medium is molten salt), and a plurality of branch pipes 19 are fixedly connected to the outer walls of the steam heat exchange pipe 3, the heat release pipe 4 and the return liquid pipe 5 at equal distances. The side wall of the hot sand box 6 is fixedly connected to a fixed frame 9, and a fixed pipe 10 is fixedly connected to the inner side of the fixed frame 9 relative to the position next to the branch pipe 19. Three circular hole plates 11 are laterally slidably connected to the inner side of the fixed frame 9. Bellows 12 are fixedly connected between the side walls of the three circular hole plates 11 and the side ends of the fixed pipe 10. A conical sealing ring 13 is fixedly connected to the side of the circular hole plate 11 away from the bellows 12. An installation mechanism for driving the conical sealing ring 13 to move is provided in the fixed frame 9, and a fixing mechanism for fixing the position of the hot sand box 6 is also provided;

[0034] The steam heat exchange pipe 3 is connected to the external heat collection unit, the heat release pipe 4 is connected to the inlet of the external circulation conversion radiator, and the return liquid pipe 5 is connected to the outlet of the external circulation conversion radiator. One of the fixed pipes 10 located next to the steam heat exchange pipe 3 is connected to the heat exchange pipe in the heat storage sand box 6, and the side ends of the other two fixed pipes 10 are both fixedly connected to the inside of the heat storage sand box 6;

[0035] The conical sealing ring 13 is made of high temperature resistant rubber material, and the bellows 12 is made of high temperature resistant metal material;

[0036] The mounting mechanism includes a pair of bolts 14, and the bolts 14 are threaded through the top of the fixed frame 9. The inner side of the fixed frame 9 is longitudinally slidably connected to a top plate 15. Both sides of the outer wall of the circular hole plate 11 are fixedly connected to upper right-angle blocks 16 with inclined surfaces. The bottom end of the top plate 15 is fixedly connected to an upper extrusion block 17 relative to the bottom end of the upper right-angle block 16, and the bottom end of the upper extrusion block 17 is inclined, and the inclined surface of the upper extrusion block 17 is in contact with the inclined surface of the upper right-angle block 16. An upper spring 18 is fixedly connected between the inner side of the fixed frame 9 and the side wall of the circular hole plate 11.

[0037] Four slots 7 are provided at the top of the heat storage sand box 6 and the top of the bottom plate 1. The bottom of the heat storage sand box 6 is fixedly connected with an insert block 8 inserted into the slot 7. The arrangement of the slot 7 and the insert block 8 facilitates the pre-fixation of the position of the heat storage sand box 6 to ensure the initial stability of the installation process. Buckle grooves 20 are provided on both sides of the outer wall of the heat storage sand box 6. The arrangement of the buckle grooves 20 facilitates the staff to lift the heat storage sand box 6, thereby improving the convenience of the device.

[0038] When installing the sandbox heat storage device, first fix the bottom plate 1 to the ground with expansion screws, and connect the steam heat exchange pipe 3, heat release pipe 4 and return liquid pipe 5 to the corresponding pipes, then place the heat storage sandbox 6 on the bottom plate 1, and insert the plug 8 on the heat storage sandbox 6 into the corresponding slot 7. At this time, the conical sealing ring 13 is located next to the end of the branch pipe 19. Then, the two bolts 14 can be rotated at the same time to move the screw downward, and at the same time, the top plate 15 is pushed downward in the fixing frame 9, and the upper extrusion block 17 is driven to move downward. At this time, the upper extrusion block The inclined surface of 17 squeezes the inclined surface of the upper right-angle block 16. Since the upper right-angle block 16 and the circular hole plate 11 can only move laterally in the fixed frame 9, the upper right-angle block 16 and the circular hole plate 11 are pushed to slide laterally under the extrusion of the inclined surface of the upper extrusion block 17, and at the same time drive the bellows 12 to stretch, and drive the conical sealing ring 13 to insert into the corresponding branch pipe 19, and stretch the upper spring 18, thereby achieving sealed communication between the upper pipe of the heat storage sand box 6 and the branch pipe 19. Finally, repeat the above operation and install the required number of heat storage sand boxes 6 in sequence.

[0039] (It should be noted that the heat storage sand box 6 is not filled with molten salt during installation. After all the heat storage sand boxes 6 are installed, the return liquid pipe 5 needs to pump the molten salt from the external storage tank into the heat storage sand box 6. During the filling process, ensure that the temperature of the molten salt is higher than its melting point to maintain its fluidity. Use a temperature sensor to monitor the temperature of the molten salt to ensure that it is within a safe range. The heat storage sand box 6 is equipped with an exhaust device. During the filling process, ensure that the air in the heat storage sand box 6 can be discharged to avoid bubbles affecting the heat transfer efficiency. During dismantling, all the molten salt in the heat storage sand box 6 needs to be discharged before disassembly and assembly).

[0040] To sum up, through the design of the above structure, by modularizing the heat storage sand box 6, it can be flexibly disassembled and assembled according to actual needs without replacing the equipment as a whole, which greatly reduces the expansion cost. Moreover, the modular design allows each module to be operated and maintained independently. When a module fails, it can be shut down for repair alone without affecting the normal operation of other modules. Moreover, through the setting of the installation mechanism, only two bolts 14 need to be rotated to quickly seal and connect the pipe on the heat storage sand box 6 with the branch pipe 19.

[0041] On the basis of the above embodiment, it was found during use that since branches 19 are reserved on the steam heat exchange tube 3, the heat release tube 4 and the return liquid tube 5, if valves are not set on the branch pipes 19, it will cause waste of resources. However, if valves are set, each time the heat storage sand box 6 is installed, workers need to open the corresponding valves, which is more troublesome. In order to solve the above problem, the above structure has been further improved.

[0042] The branch pipes 19 on the steam heat exchange pipe 3 and the liquid return pipe 5 are fixedly connected with push-type valves 21 (it should be noted that the push-type valves 21 themselves have a rebound function, and after the valve opening block 26 is reset, they will be pushed back to their original position under the elastic force of the elastic device on the push-type valve 21, and the corresponding branch pipe 19 will be automatically blocked), and the pressing positions of the push-type valves 21 are all set on the side close to each other. The branch pipes 19 on the heat release pipe 4 are all fixedly connected with a one-way valve 22. The setting of the one-way valve 22 can prevent the liquid in the heat release pipe 4 from being discharged from the unconnected branch pipe 19, and the molten salt in the fixed pipe 10 after connection can pass through the one-way valve 22;

[0043] An access plate 23 is fixedly connected to the side wall of the fixed frame 9. A circular groove 33 is formed through the side wall of the access plate 23 relative to the position next to the conical sealing ring 13. The provision of the circular groove 33 facilitates the insertion of the conical sealing ring 13 into the corresponding branch pipe 19. A chute 24 is formed on the side wall of the access plate 23. A connecting rod 25 is fixedly connected to the side wall of the top plate 15 relative to the chute 24. The bottom end of the connecting rod 25 is fixedly connected to the valve block 26. Extrusion grooves 27 are obliquely formed on both sides of the outer wall of the valve block 26.

[0044] When the two bolts 14 are rotated to drive the top plate 15 to slide downward, the connecting rod 25 and the valve opening block 26 will be driven to move downward at the same time. Subsequently, when the upper extrusion block 17 squeezes the conical sealing ring 13 to insert into the inner side of the branch pipe 19, and the outer wall of the conical sealing ring 13 contacts the inner wall of the branch pipe 19, the inclined surface of the extrusion groove 27 on the valve opening block 26 will move to the pressing end of the push-type valve 21, and then as the top plate 15 continues to move downward, the valve opening block 26 will be driven to move downward at the same time, and then the pressing end of the push-type valve 21 will be squeezed and moved by the inclined surface of the extrusion groove 27, thereby releasing the blockage of the push-type valve 21 inside the branch pipe 19. At the same time, as the top plate 15 continues to move downward, the conical sealing ring 13 will continue to be squeezed to insert into the branch pipe 19. Since the conical sealing ring 13 is made of high-temperature resistant rubber material, the conical sealing ring 13 will be tightly squeezed against the side end of the branch pipe 19 to ensure the sealing performance when the two are connected.

[0045] To sum up, through the design of the above structure, after rotating the two bolts 14 and connecting the pipe on the heat storage sand box 6 with the reserved branch pipe 19, the push-type valves 21 on both sides can be automatically pressed to release the blockage of the pipe, thereby realizing the rapid connection between the steam heat exchange pipe 3 and the heat release pipe 4 and the heat storage sand box 6, further improving the convenience of the device, and eliminating the need for workers to manually open the valve after installation.

[0046] On the basis of the above embodiment, it was found during use that although the above structure achieved sealed communication between the pipeline of the heat storage sand box 6 and the branch pipe 19, if the position of the heat storage sand box 6 is not restricted, the sealed communication between the corresponding pipelines will also be achieved. In order to solve the above problem, the above structure was further improved.

[0047] The fixing mechanism includes a pair of T-shaped blocks 28, each of which is slidably connected to the front and rear sides of the fixed frame 9. A lower right-angle block 29 with an inclined surface is fixedly connected to the side of the T-shaped block 28 close to the fixed frame 9. A pair of lower springs 30 are fixedly connected between the side walls of the T-shaped block 28 and the inner side of the fixed frame 9. A plurality of fixing holes 31 are opened on the inner side of the fixed frame 2 at equal distances from the T-shaped block 28. The T-shaped block 28 is inserted into one of the pair of fixing holes 31.

[0048] The bottom ends of the top plate 15 are fixedly connected to lower extrusion rods 32 on both sides, and the bottom ends of the lower extrusion rods 32 are set to smooth arc surfaces;

[0049] During this process, the top plate 15 will continue to move downward, squeezing the conical sealing ring 13 tightly into the branch pipe 19.

[0050] In summary, through the design of the above structure, the heat storage sand box 6 can be quickly locked and fixed on the fixing frame 2 and the base plate 1 while rotating the two bolts 14 to seal the connecting pipe, without the need for workers to use tools for installation, further improving the convenience of the device.

[0051] The basic principles, main features and advantages of the present invention are shown and described above.

[0052] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A modular high-temperature sealed sandbox heat storage device, characterized by: The invention comprises a bottom plate (1), the top of the bottom plate (1) is fixedly connected to a fixing frame (2), the fixing frame (2) is respectively penetrated and fixedly connected to a steam heat exchange pipe (3), a heat release pipe (4) and a liquid return pipe (5), a heat storage sand box (6) is provided on the bottom plate (1), the outer walls of the steam heat exchange pipe (3), the heat release pipe (4) and the liquid return pipe (5) are fixedly connected to a plurality of branch pipes (19) at equal intervals, the side wall of the heat storage sand box (6) is fixedly connected to a fixing frame (9), the inner side of the fixing frame (9) is positioned next to the branch pipe (19) The fixing frame (9) is fixedly connected to a fixing pipe (10) passing through the fixing frame (9), three circular hole plates (11) are connected to the inner side of the fixing frame (9) in a transverse sliding manner, and a bellows (12) is fixedly connected between the side walls of the three circular hole plates (11) and the side ends of the fixing pipe (10), and a conical sealing ring (13) is fixedly connected to the side of the circular hole plate (11) away from the bellows (12). A mounting mechanism for driving the conical sealing ring (13) to move is provided in the fixing frame (9), and a fixing mechanism for fixing the position of the heat storage sand box (6) is also provided.

2. The modular high-temperature sealed sandbox heat storage device according to claim 1, characterized in that: The steam heat exchange pipe (3) is connected to an external heat collection unit, the heat release pipe (4) is connected to an external circulation conversion heat release inlet, and the return liquid pipe (5) is connected to an external circulation conversion heat release outlet. One of the fixed pipes (10) located next to the steam heat exchange pipe (3) is connected to the heat exchange pipe in the heat storage sand box (6), and the side ends of the other two fixed pipes (10) are both fixedly connected to the inside of the heat storage sand box (6).

3. The modular high-temperature sealed sandbox heat storage device according to claim 1, characterized in that: The conical sealing ring (13) is made of a high-temperature resistant rubber material, and the bellows (12) is made of a high-temperature resistant metal material.

4. The modular high-temperature sealed sandbox heat storage device according to claim 1, characterized in that: The mounting mechanism includes a bolt (14), a pair of the bolts (14) are provided, and the bolts (14) are threadedly connected to the top of the fixed frame (9), the inner side of the fixed frame (9) is longitudinally slidably connected to a top plate (15), both sides of the outer wall of the circular hole plate (11) are fixedly connected to upper right-angle blocks (16) with inclined surfaces, the bottom end of the top plate (15) is fixedly connected to an upper extrusion block (17) relative to the bottom end of the upper right-angle block (16), and the bottom end of the upper extrusion block (17) is inclined, and the inclined surface of the upper extrusion block (17) is in contact with the inclined surface of the upper right-angle block (16), and an upper spring (18) is fixedly connected between the inner side of the fixed frame (9) and the side wall of the circular hole plate (11).

5. The modular high-temperature sealed sandbox heat storage device according to claim 1, characterized in that: Four slots (7) are provided at the top of the heat storage sand box (6) and the top of the bottom plate (1), an inserting block (8) inserted into the slots (7) is fixedly connected to the bottom of the heat storage sand box (6), and buckle slots (20) are provided on both sides of the outer wall of the heat storage sand box (6).

6. The modular high-temperature sealed sandbox heat storage device according to claim 1, characterized in that: The branch pipes (19) on the steam heat exchange pipe (3) and the liquid return pipe (5) are both fixedly connected with a push-type valve (21), and the pressing positions of the push-type valves (21) are both arranged on a side close to each other. The branch pipes (19) on the heat release pipe (4) are both fixedly connected with a one-way valve (22).

7. The modular high-temperature sealed sandbox heat storage device according to claim 4, characterized in that: The side wall of the fixed frame (9) is fixedly connected to an inspection plate (23), a circular groove (33) is provided through the side wall of the inspection plate (23) relative to the position next to the conical sealing ring (13), and a sliding groove (24) is provided on the side wall of the inspection plate (23), and a connecting rod (25) is fixedly connected to the side wall of the top plate (15) relative to the sliding groove (24), the bottom end of the connecting rod (25) is fixedly connected to the valve block (26), and the outer wall of the valve block (26) is inclined with extrusion grooves (27) on both sides.

8. The modular high-temperature sealed sandbox heat storage device according to claim 1, characterized in that: The fixing mechanism includes a T-shaped block (28), a pair of the T-shaped blocks (28) are provided, and the T-shaped blocks (28) are both slidably connected to the front and rear sides of the fixing frame (9), and the adjacent sides of the T-shaped blocks (28) are both fixedly connected to a lower right-angle block (29) with an inclined surface, and a pair of lower springs (30) are fixedly connected between the side walls of the T-shaped blocks (28) and the inner side of the fixing frame (9), and a plurality of fixing holes (31) are opened on the inner side of the fixing frame (2) at equal distances from the positions next to the T-shaped blocks (28), and the T-shaped blocks (28) are inserted into one of the pair of fixing holes (31).

9. The modular high-temperature sealed sandbox heat storage device according to claim 4, characterized in that: Lower extrusion rods (32) are fixedly connected to both sides of the bottom end of the top plate (15), and the bottom ends of the lower extrusion rods (32) are configured as smooth arc surfaces.

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