Fused salt storage device with movable support frame and legs

Abstract

The molten salt storage device with movable support frame and supporting legs comprises a tank body, the cross section of the tank body is circular, the top of the tank body is provided with a feeding port, the lower part of the tank body is provided with a support plate, the plate surface of the support plate is in the horizontal direction, the tank body is placed on the support plate, the tank body and the support plate are not fixed, the outer side of the top of the support plate is fixed with a circular ring-shaped fence, the diameter of the inner wall circle of the fence is greater than or equal to the outer wall diameter of the tank body when the tank body is heated to the maximum diameter, the lower part of the support plate is provided with a support frame, the support plate and the support frame are fixedly connected, and the lower part of the support frame is provided with a plurality of supporting legs. The purpose is to provide a molten salt storage device with movable support frame and supporting legs which can absorb displacement variables caused by temperature changes, thereby avoiding local stress of the storage tank to cause equipment damage, molten salt leakage, serious pollution to the environment and accidental injury to personnel.

Description

Technical Field

[0001] This invention relates to the field of solar thermal power generation, and more specifically to a molten salt storage device with a movable support frame and legs. Background Technology

[0002] In solar thermal storage technology, a large number of molten salt storage tanks are required to store thermal energy. These tanks are filled and emptied daily. When molten salt is added, its high temperature causes the tank's main metal to expand; when the molten salt is emptied, the metal contracts due to the drop in temperature. If a conventional fixed installation method is used, it cannot absorb the stress generated by thermal expansion and contraction, leading to localized stress that can damage equipment, cause molten salt leaks, severely pollute the environment, and cause accidental injuries. Summary of the Invention

[0003] The purpose of this invention is to provide a molten salt storage device with movable support frame and legs that can absorb displacement variables caused by temperature changes, thereby avoiding equipment damage, molten salt leakage, serious environmental pollution, and accidental injury to personnel caused by local stress in the storage tank.

[0004] The present invention provides a molten salt storage device with a movable support frame and legs, comprising a tank body with a circular cross-section, a feed inlet at the top of the tank body, a support plate at the bottom of the tank body, the surface of the support plate being horizontal, the tank body being placed on the support plate, the tank body being not fixed to the support plate, an annular surrounding plate being fixed to the outer side of the top of the support plate, the diameter of the inner wall circle of the surrounding plate after thermal expansion being greater than or equal to the outer wall diameter of the tank body when thermally expanded to its maximum diameter, the diameter of the inner wall circle of the surrounding plate after thermal expansion and the maximum diameter of the tank body after thermal expansion being calculated based on the linear expansion coefficient of the metal material used in the tank body, a support frame being provided below the support plate, the support plate being fixedly connected to the support frame, and multiple legs being provided below the support frame;

[0005] Each of the outriggers includes a support column, and a outrigger pad is fixed to the top of each support column. The surface of the outrigger pad is in the horizontal direction. The upper surface of each outrigger pad is in contact with the lower surface of a connecting plate. Each connecting plate is fixedly connected to the bottom of the support frame.

[0006] Each of the outrigger pads has a bolt hole along the vertical direction, and the connecting plate corresponding to each bolt hole has a bolt adjustment hole along the vertical direction. Each outrigger pad and the corresponding connecting plate are connected by bolts passing through the bolt holes. Each bolt is screwed with a nut, and each bolt is fitted with a large washer. The lower surface of the large washer is in contact with the upper surface of the connecting plate.

[0007] The diameter of the bolt adjustment hole is 1.5 to 3 times the diameter of the corresponding bolt hole, and the outer diameter of the large washer is 1.5 to 3 times the diameter of the bolt adjustment hole.

[0008] Preferably, the number of legs is 3 to 6.

[0009] Preferably, the diameter of the bolt adjustment hole is 1.8 to 2.5 times the diameter of the corresponding bolt hole, the outer diameter of the large washer is 1.8 to 2.5 times the diameter of the bolt adjustment hole, and the number of the support legs is 4.

[0010] Preferably, the diameter of the bolt adjusting hole is twice the diameter of the corresponding bolt hole, and the outer diameter of the large washer is twice the diameter of the bolt adjusting hole.

[0011] Preferably, a base plate is welded to the bottom of the support leg, and the surface of the base plate is in the horizontal direction.

[0012] Preferably, the support frame includes two horizontal channel steels, which are spaced apart in the left-right horizontal direction, and two longitudinal channel steels are provided between the two horizontal channel steels, which are spaced apart in the front-back horizontal direction. The two horizontal channel steels and the two longitudinal channel steels are connected together by welding.

[0013] During use, the molten salt storage device with movable support frame and legs of the present invention will cause significant temperature changes due to frequent filling and discharging of molten salt in the tank, as well as volume changes in the tank caused by temperature changes. This will cause the tank to undergo relative displacement along the radial direction on the support plate. The surrounding plate can prevent the tank from slipping off the support plate due to displacement. The diameter of the bolt adjustment hole is 1.5 to 3 times the diameter of the corresponding bolt hole, and the outer diameter of the large washer is 1.5 to 3 times the diameter of the bolt adjustment hole. This dimensional design allows the bolts to move within their corresponding bolt holes and adjusting holes, thereby absorbing displacement caused by thermal expansion and contraction and reducing stress at the bolt connection. Specifically, by having adjusting holes on the connecting plate along the vertical direction, with the diameter of these holes larger than the corresponding bolt holes, and the outer diameter of the large washer larger than the diameter of the adjusting holes, the bolt adjusting holes on the connecting plate can offset and mitigate the expansion and contraction of the support frame due to temperature changes. The outer diameter of the large washer is larger than the bolt adjusting holes on the connecting plate to prevent the nut from falling out of the openings in the connecting plate, causing connection failure. Therefore, the molten salt storage device with movable support frame and legs of this invention has the characteristics of absorbing displacement variables caused by temperature changes, thereby avoiding localized stress in the storage tank that could damage the equipment, cause molten salt leakage, serious environmental pollution, and accidental injury to personnel.

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a front view of a structural schematic diagram of the molten salt storage device with a movable support frame and legs according to the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the structure along the A-A direction;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure along the B-B direction;

[0018] Figure 4 This is an enlarged front cross-sectional view of the large gasket portion of the molten salt storage device with movable support frame and legs according to the present invention. Detailed Implementation

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the molten salt storage device with movable support frame and legs of the present invention includes a tank 1, the cross-section of the tank 1 is circular, the top of the tank 1 is provided with a feed port 2, the bottom of the tank 1 is provided with a support plate 3, the surface of the support plate 3 is in the horizontal direction, the tank 1 is placed on the support plate 3, the tank 1 and the support plate 3 are not fixed, a circular ring plate 4 is fixed to the outer side of the top of the support plate 3, the diameter of the inner wall circle of the ring plate 4 after thermal expansion is greater than or equal to the outer wall diameter of the tank 1 when it is thermally expanded to its maximum diameter, the diameter of the inner wall circle of the ring plate 4 after thermal expansion and the maximum diameter of the tank 1 after thermal expansion are calculated based on the linear expansion coefficient of the metal material used in the tank 1, a support frame 5 is provided below the support plate 3, the support plate 3 is fixedly connected to the support frame 5, and multiple legs 6 are provided below the support frame 5.

[0020] Each of the support legs 6 includes a support column 7, and a support leg pad 8 is fixed to the top of each support column 7. The surface of the support leg pad 8 is in the horizontal direction. The upper surface of each support leg pad 8 is in contact with the lower surface of a connecting plate 9. Each connecting plate 9 is fixedly connected to the bottom of the support frame 5.

[0021] Each of the outrigger pads 8 has a bolt hole 12 along the vertical direction, and the connecting plate 9 corresponding to each bolt hole 12 has a bolt adjustment hole 13 along the vertical direction. Each outrigger pad 8 and the corresponding connecting plate 9 are respectively positioned and connected by bolts 10 passing through the bolt holes 12. Each bolt 10 is screwed with a nut 18, and each bolt 10 is fitted with a large washer 11. The lower surface of the large washer 11 is in contact with the upper surface of the connecting plate 9.

[0022] The diameter of the bolt adjusting hole 13 is 1.5 to 3 times the diameter of the corresponding bolt hole 12, and the outer diameter of the large washer 11 is 1.5 to 3 times the diameter of the bolt adjusting hole 13. This size design allows the bolt 10 to move in the corresponding bolt hole 12 and bolt adjusting hole 13, thereby absorbing the displacement caused by thermal expansion and contraction and reducing the stress at the bolt connection.

[0023] As a further improvement of the present invention, the number of the above-mentioned support legs 6 is 3 to 6.

[0024] As a further improvement of the present invention, the diameter of the bolt adjustment hole 13 is 1.8 to 2.5 times the diameter of the corresponding bolt hole 12, the outer diameter of the large washer 11 is 1.8 to 2.5 times the diameter of the bolt adjustment hole 13, and the number of the support legs 6 is 4.

[0025] As a further improvement of the present invention, the diameter of the bolt adjusting hole 13 is twice the diameter of the corresponding bolt hole 12, and the outer diameter of the large washer 11 is twice the diameter of the bolt adjusting hole 13.

[0026] As a further improvement of the present invention, a base plate 14 is welded to the bottom of the support leg 6, and the surface of the base plate 14 is located in the horizontal direction.

[0027] As a further improvement of the present invention, the aforementioned support frame 5 includes two horizontal channel steels 15, which are spaced apart horizontally in the left-right direction. Two longitudinal channel steels 16 are provided between the two horizontal channel steels 15, which are spaced apart horizontally in the front-back direction. The two horizontal channel steels 15 and the two longitudinal channel steels 16 are welded together to form a single unit. This welding connection increases the rigidity of the support plate 3 while also providing the advantage of light weight. Furthermore, the connecting plate and the support frame 5 are also welded together.

[0028] During use, the molten salt storage device with movable support frame and legs of the present invention will cause significant temperature changes due to frequent filling and discharging of molten salt in tank 1, as well as volume changes in tank 1 caused by temperature changes. This will cause relative displacement of tank 1 in the radial direction on support plate 3. The surrounding plate 4 can prevent tank 1 from slipping off support plate 3 due to displacement. At the same time, the connecting plate 9 is provided with bolt adjustment holes 13 in the vertical direction. The diameter of bolt adjustment holes 13 is larger than the diameter of the corresponding bolt holes 12. The outer diameter of the large washer 11 is larger than the diameter of bolt adjustment holes 13. The bolt adjustment holes 13 on the connecting plate 9 can also offset and reduce the expansion and contraction of support frame 5 caused by temperature changes. The outer diameter of the large washer is larger than the bolt adjustment holes 13 on the connecting plate 9 to prevent nut 18 from falling off the opening of connecting plate 9 and causing connection failure. Therefore, the molten salt storage device with movable support frame and legs of the present invention has the characteristics of absorbing displacement variables caused by temperature changes, thereby avoiding equipment damage, molten salt leakage, serious environmental pollution, and accidental injury to personnel caused by local stress in the storage tank.

[0029] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A molten salt storage device with a movable support frame and legs, characterized in that: The tank (1) has a circular cross-section. The tank (1) has a feed inlet (2) at the top and a support plate (3) at the bottom. The surface of the support plate (3) is horizontal. The tank (1) is placed on the support plate (3). The tank (1) and the support plate (3) are not fixed. A circular ring-shaped enclosure (4) is fixed on the outer side of the top of the support plate (3). The diameter of the inner wall circle of the enclosure (4) after thermal expansion is greater than or equal to the outer wall diameter of the tank (1) when it is thermally expanded to its maximum diameter. The diameter of the inner wall circle of the enclosure (4) after thermal expansion and the maximum diameter of the tank (1) after thermal expansion are calculated based on the linear expansion coefficient of the metal material used in the tank (1). A support frame (5) is provided below the support plate (3). The support plate (3) and the support frame (5) are fixedly connected. Multiple legs (6) are provided below the support frame (5). Each of the legs (6) includes a support column (7), and a leg pad (8) is fixed to the top of each support column (7). The surface of the leg pad (8) is in the horizontal direction. The upper surface of each leg pad (8) is in contact with the lower surface of a connecting plate (9). Each connecting plate (9) is fixedly connected to the bottom of the support frame (5). Each of the outrigger pads (8) has a bolt hole (12) in the vertical direction. The connecting plate (9) corresponding to each bolt hole (12) has a bolt adjustment hole (13) in the vertical direction. Each outrigger pad (8) and the corresponding connecting plate (9) are respectively connected by bolts (10) passing through the bolt holes (12). Each bolt (10) is screwed with a nut (18). Each bolt (10) is fitted with a large washer (11). The lower surface of the large washer (11) is in contact with the upper surface of the connecting plate (9). The diameter of the bolt adjustment hole (13) is 1.5 to 3 times the diameter of the corresponding bolt hole (12), and the outer diameter of the large washer (11) is 1.5 to 3 times the diameter of the bolt adjustment hole (13). The number of the outriggers (6) is 3 to 6.

2. The molten salt storage device with a movable support frame and legs as described in claim 1, characterized in that: The diameter of the bolt adjustment hole (13) is 1.8 to 2.5 times the diameter of the corresponding bolt hole (12), the outer diameter of the large washer (11) is 1.8 to 2.5 times the diameter of the bolt adjustment hole (13), and the number of the support legs (6) is 4.

3. The molten salt storage device with a movable support frame and legs as described in claim 2, characterized in that: The diameter of the bolt adjustment hole (13) is twice the diameter of the corresponding bolt hole (12), and the outer diameter of the large washer (11) is twice the diameter of the bolt adjustment hole (13).

4. The molten salt storage device with a movable support frame and legs as described in claim 3, characterized in that: The bottom of the support leg (6) is welded with a base plate (14), and the surface of the base plate (14) is in the horizontal direction.

5. The molten salt storage device with a movable support frame and legs as described in any one of claims 1 to 4, characterized in that: The support frame (5) includes two horizontal channel steels (15), which are spaced apart in the left and right horizontal directions. Two longitudinal channel steels (16) are provided between the two horizontal channel steels (15), which are spaced apart in the front and back horizontal directions. The two horizontal channel steels (15) and the two longitudinal channel steels (16) are connected together by welding.

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