Large fused salt storage tank vault overhauling platform

Abstract

The utility model discloses a large fused salt storage tank vault overhauling platform which comprises a plurality of sections of platforms fixedly arranged on a vault, and each section of platform comprises two outer supporting assemblies, two inner supporting assemblies and a platform frame. The outer supporting assembly and the inner supporting assembly each comprise a base plate fixedly connected with the vault, a lower supporting leg fixedly connected with the base plate, a first lower supporting plate fixedly connected with the upper end of the lower supporting leg, an upper supporting leg, a first upper supporting plate fixedly connected with the lower end of the upper supporting leg, and a second lower supporting plate fixedly connected with the upper end of the upper supporting leg. Each first upper supporting plate is connected with the corresponding first lower supporting plate through a plurality of bolts. The platform frame comprises a frame composed of an inner arc steel piece, an outer arc steel piece and two end steel pieces which are connected, a plurality of supporting steel pieces connecting the inner arc steel piece and the outer arc steel piece, and a horizontal patterned steel plate fixedly connected with the upper side of the frame. The device can eliminate the limitation of the platform on the expansion of the vault, reduces the stress between the platform and the vault, prolongs the service life of the vault, guarantees the platform to be horizontal, and facilitates the maintenance and other operations of personnel.

Description

Technical Field

[0001] This utility model relates to a dome-shaped maintenance platform, and more particularly to a dome-shaped maintenance platform for large molten salt storage tanks. Background Technology

[0002] In emerging industries such as solar thermal energy, flexible energy storage retrofitting, and coal-fired cogeneration coupled with molten salt energy storage systems, storing thermal energy using molten salt is a crucial process. Equipment for storing molten salt includes high-temperature and low-temperature molten salt tanks, storing molten salt at temperatures ranging from 190-565℃, with tank diameters ranging from 10-40m. When the molten salt is binary solar salt, the operating temperatures of the high-temperature and low-temperature molten salt tanks are approximately 565℃ and 290℃, respectively, and the tanks are equipped with a thick insulation layer. Currently, the commonly used tank material in the industry is SA-240GR347H stainless steel. During normal operation, due to the high coefficient of linear expansion of stainless steel, the molten salt tank will experience significant thermal displacement: calculations show that at 565℃, the thermal expansion of 1m of 347H stainless steel is 10mm. The design of molten salt storage tanks needs to consider the impact of this thermal displacement, especially the maintenance platform on top of the tank. Currently, maintenance platforms in the industry are commonly used for cryogenic oil tanks. Several of their supports are anchored at the base of the arch, and a layer of corrugated steel plate is laid after the supports extend beyond the insulation layer. Since the arch is a supporting spherical arch, when this platform is used for molten salt storage tanks, the arch will undergo thermal displacement outward along the radial direction, and thermal stress will be generated between the platform and the arch. This not only affects the life of the arch but also causes the corrugated steel plate to tilt, making it extremely inconvenient to walk on and hindering personnel from carrying out handling, maintenance, and other operations on it. Summary of the Invention

[0003] The purpose of this utility model is to address the above-mentioned shortcomings of the existing technology by providing a maintenance platform for the dome of a large molten salt storage tank. This platform can move in the direction of thermal expansion of the storage tank, thereby eliminating the restriction of the platform on the expansion of the dome and reducing the stress between the platform and the dome. This not only extends the life of the dome but also ensures that the platform is level, facilitating personnel maintenance and other operations.

[0004] To achieve the above objectives, this utility model provides a large molten salt storage tank dome maintenance platform, comprising a tank body, a dome, and an insulation layer disposed on the outer sides of both; characterized in that: several platform segments arranged in a ring are fixedly mounted on the dome, each platform segment comprising two outer support components, two inner support components, and a platform frame; the outer support components and inner support components each include a pad fixedly connected to the dome, a lower support leg fixedly connected to the pad, a first lower support plate fixedly connected to the upper end of the lower support leg, an upper support leg, a first upper support plate fixedly connected to the lower end of the upper support leg, and a second lower support plate fixedly connected to the upper end of the upper support leg; each first upper support plate is connected to its respective first lower support plate by several bolts; the platform frame comprises... The frame consists of an inner arc steel component, an outer arc steel component, and steel components at both ends; several supporting steel components connecting the inner and outer arc steel components; and a horizontal corrugated steel plate fixed to the upper side of the frame. Four second upper support plates are fixed to the lower side of the frame. Each second upper support plate is connected to its respective second lower support plate by several bolts. Guardrails are fixed to the upper sides of both the inner and outer arc steel components. The first upper support plate of the inner support assembly has several lower elongated oval holes, the direction of which is consistent with the radial direction of the tank at that location. Each second upper support plate has several upper elongated oval holes, the direction of which is consistent with the tangential direction of the tank at that location. All bolts pass through either the lower or upper elongated oval holes.

[0005] The lower ends of the external support assembly and the internal support assembly of this utility model are fixedly connected to the arch. Each support assembly includes a lower support leg and an upper support leg connected by bolts. Each upper support leg is connected to the frame of the platform frame by bolts. When the molten salt storage tank is in use, when the arch expands thermally, the lower support leg of the internal support assembly can move along the radius of the tank body through the bolts passing through the lower elongated holes of the first upper support plate. The upper support leg can move along the tangential direction of the tank body through the bolts passing through the upper elongated holes of each second upper support plate. This allows the maintenance platform to move accordingly in the two-dimensional direction, which can eliminate the restriction of the platform on the expansion of the arch and reduce the stress between the platform and the arch. This not only extends the service life of the arch but also ensures that the steel plate and guardrail are always horizontal, which is conducive to personnel maintenance and other operations.

[0006] As a further improvement of this utility model, the inner arc steel component, the outer arc steel component, and the steel components at both ends are all channel steel, and the supporting steel components are all angle steel; this can improve the strength of the frame and facilitate manufacturing.

[0007] As a further improvement of this utility model, a gasket is provided between each of the first upper support plates and their respective first lower support plates; the gasket can insulate heat and reduce the deformation of the upper parts.

[0008] As a further improvement of this utility model, the frames and guardrails of the two adjacent platform sections are spaced 10 mm apart in the circumferential direction to ensure that each platform section has sufficient deformation space.

[0009] As a further improvement of this utility model, the first upper support plate and the first lower support plate, the second upper support plate and the second lower support plate, the several upper elongated holes of each second upper support plate, and the several lower elongated holes of the two first upper support plates of the inner support assembly in each platform are all symmetrically arranged along the radial center line of the frame; this can achieve uniformity of movement of the lower support legs and the upper support legs.

[0010] In summary, this utility model can move in the direction of thermal expansion of the storage tank, which can eliminate the restriction of the platform on the expansion of the dome and reduce the stress between the platform and the dome. This not only extends the life of the dome but also ensures that the platform is level, which is beneficial for personnel maintenance and other operations. Attached Figure Description

[0011] Figure 1 This is a front view of an embodiment of the present utility model.

[0012] Figure 2 for Figure 1 Top view (only showing each platform segment).

[0013] Figure 3 for Figure 1 Enlarged view of point A.

[0014] Figure 4 for Figure 3 The main view of the middle frame.

[0015] Figure 5 for Figure 3 A C-direction view (showing only the location of the support plane).

[0016] Figure 6 for Figure 3 Enlarged front view of the first lower support plate and the second lower support plate of the inner and outer support components, and the first upper support plate of the outer support component.

[0017] Figure 7 for Figure 3 A magnified front view of the two first upper support plates of the inner support assembly.

[0018] Figure 8 for Figure 3 The enlarged front view of the four second upper support plates.

[0019] Figure 9 for Figure 2 Enlarged view of point B. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figures 1 to 9As shown, this embodiment of a large molten salt storage tank dome maintenance platform includes a tank body 1, a dome 2, and an insulation layer 3 disposed on the outside of both. Several platform segments 4 arranged in a ring are fixed on the dome 2. Each platform segment 4 includes two outer support components 5, two inner support components 6, and a platform frame 7. Each outer support component 5 includes a pad 51 welded to the dome 2, a lower support leg 52 welded to the pad 51, a first lower support plate 53 fixed to the upper end of the lower support leg 52, an upper support leg 55, a first upper support plate 54 fixed to the lower end of the upper support leg 55, and a second lower support plate 56 fixed to the upper end of the upper support leg 55. A gasket 57 is provided between each first upper support plate 54 and its respective first lower support plate 53. Each first upper support plate 54 and its respective first lower support plate 53 are connected by four bolts through four circular holes in both. The inner support... Each component 6 includes a pad 61 welded and fixed to the dome 2, a lower support leg 62 fixed to the pad 61, a first lower support plate 63 fixed to the upper end of the lower support leg 62, an upper support leg 65, a first upper support plate 64 fixed to the lower end of the upper support leg 65, and a second lower support plate 66 fixed to the upper end of the upper support leg 65. Each first upper support plate 64 is provided with a gasket 68 between it and its respective first lower support plate 63. Each first lower support plate 63 is provided with four circular holes, and each first upper support plate 64 is provided with four lower oblong holes 67. The direction of each lower oblong hole is consistent with the radial direction of the tank at that location. Each first upper support plate 64 and its respective first lower support plate 63 are connected by four bolts corresponding to the circular holes and lower oblong holes 67. The second lower support plate 56 of the outer support component 5 and the second lower support plate 66 of the inner support component 6 are both provided with four circular holes.

[0022] The platform frame 7 includes a frame composed of connected inner arc steel members 71, outer arc steel members 72, and steel members 73 at both ends; several supporting steel members 74 connecting the inner arc steel members 71 and the outer arc steel members 72; and a horizontal corrugated steel plate 77 fixed to the upper side of the frame. The inner arc steel members 71, outer arc steel members 72, and steel members 73 at both ends are all channel steel, and the supporting steel members 74 are all angle steel. Four second upper support plates 75 are welded and fixed to the lower side of the frame. Each second upper support plate 75 has four upper elongated holes 76, and the direction of each upper elongated hole is consistent with the tangent direction of the tank at that location. Each second upper support plate 75 is connected to its respective lower second support plate 56 or 66 by four bolts passing through the upper elongated holes 76. The first upper support plate 54 and the first lower support plate 53, the second upper support plate 75 and the lower lower support plate 56 of the outer support assembly 5 in each platform section are connected. The two lower support plates 56 are symmetrically arranged along the radial center line of the frame. The first upper support plate 64 and the first lower support plate 63, the second upper support plate 75 and the second lower support plate 66 of the inner support component 6 in each platform section are symmetrically arranged along the radial center line of the frame. The upper elongated holes 76 of the four second upper support plates 75 and the several lower elongated holes 67 of the two first upper support plates 64 of the inner support component 6 are symmetrically arranged along the radial center line of the frame. The upper sides of the inner arc steel member 71 and the outer arc steel member 72 are fixedly connected to the guardrail 8. The frames and guardrails 8 of the two adjacent platform sections 4 are set with a 10 mm gap in the circumferential direction. The inner support component 6 is located radially inside the arch 2 compared to the outer support component 5. Its upper support leg 65 or lower support leg 62 is shorter than the upper support leg 55 or lower support leg 52 to ensure the horizontal setting of the platform frame 7 and the guardrail 8.

[0023] The pads 51 and 61 at the lower ends of the outer support assembly 5 and the inner support assembly 6 of this utility model are welded and fixed to the arch 2. Each support assembly 5 and 6 includes lower support legs 52 and 62 and upper support legs 55 and 65 connected by bolts. Each upper support leg 55 and 65 is connected to the second upper support plate 75 on the lower side of the platform frame 7 by bolts. When the molten salt storage tank is in use, when the arch 2 undergoes thermal expansion, the amount of thermal expansion only occurs in the two-dimensional direction of the horizontal plane, and the amount of expansion in the height direction is smaller. This amount of expansion can be adjusted by the tightness of the locking nuts on each bolt. The lower support leg 52 of the inner support assembly 5 can move along the radius of the tank body 1 by means of bolts passing through the lower elongated holes 67 of the first upper support plate 64. Each upper support leg 55 and 65 can move along the tangential direction of the tank body 1 by means of bolts passing through the upper elongated holes 76 of each second upper support plate 75. This allows the arch 2 to move in a two-dimensional direction relative to each platform 4, which can eliminate the restriction of the platform 4 on the expansion of the arch 2 and reduce the stress between the platform 4 and the arch 2. This not only extends the life of the arch but also ensures that the steel plate 77 and the guardrail 8 are always horizontal, which is conducive to personnel maintenance and other operations.

[0024] Each gasket 57 or 68 can insulate against heat and reduce thermal deformation of the parts above it; the frames and guardrails 8 of two adjacent platform sections 4 are set with a certain gap in the circumferential direction to ensure that each platform section has enough deformation space and prevent deformation.

[0025] The first upper support plate 54 and the first lower support plate 53, the second upper support plate 75 and the second lower support plate 56 of the outer support assembly 5 are all symmetrically arranged along the radial center line of the frame. The first upper support plate 64 and the first lower support plate 63, the second upper support plate 75 and the second lower support plate 66 of the inner support assembly 6 in each platform section are all symmetrically arranged along the radial center line of the frame. The upper elongated holes 76 of the four second upper support plates 75 and the several lower elongated holes 67 of the two first upper support plates 64 of the inner support assembly 6 are all symmetrically arranged along the radial center line of the frame, which can realize the uniformity of movement of each lower support leg and each upper support leg.

[0026] The above embodiments have been used to illustrate the invention, but it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments.

Claims

1. A large molten salt storage tank dome maintenance platform, comprising a tank body, a dome, and an insulation layer disposed on the outer sides of both; characterized in that: Several platforms arranged in a ring are fixed on the arch. Each platform includes two outer support components, two inner support components, and a platform frame. The outer and inner support components each include a pad fixed to the arch, a lower support leg fixed to the pad, a first lower support plate fixed to the upper end of the lower support leg, an upper support leg, a first upper support plate fixed to the lower end of the upper support leg, and a second lower support plate fixed to the upper end of the upper support leg. Each first upper support plate is connected to its respective first lower support plate by several bolts. The platform frame includes a frame composed of connected inner arc steel members, outer arc steel members, and steel members at both ends, and connecting inner arc steel members... The inner and outer arc steel components are supported by several supporting steel members, and a horizontal corrugated steel plate is fixed to the upper side of the frame. Four second upper support plates are fixed to the lower side of the frame. Each second upper support plate is connected to its respective second lower support plate by several bolts. Guardrails are fixed to the upper side of both the inner and outer arc steel components. The first upper support plate of the inner support assembly is provided with several lower elongated oval holes, and the direction of each lower elongated oval hole is consistent with the radial direction of the tank at that location. Each second upper support plate is provided with several upper elongated oval holes, and the direction of each upper elongated oval hole is consistent with the tangential direction of the tank at that location. The bolts pass through the lower elongated oval holes or the upper elongated oval holes.

2. The large molten salt storage tank dome maintenance platform as described in claim 1, characterized in that: The inner arc steel component, outer arc steel component, and steel components at both ends are all channel steel, and the supporting steel components are all angle steel.

3. A large molten salt storage tank dome maintenance platform as described in claim 1 or 2, characterized in that: Each of the first upper support plates and its respective first lower support plate is provided with a gasket.

4. The large molten salt storage tank dome maintenance platform as described in claim 3, characterized in that: The frames and guardrails of two adjacent platform sections are spaced 10 mm apart in the circumferential direction.

5. The large molten salt storage tank dome maintenance platform as described in claim 4, characterized in that: In each platform, the first upper support plate and the first lower support plate, the second upper support plate and the second lower support plate of the outer support component and the inner support component, the several upper elongated holes of each second upper support plate, and the several lower elongated holes of the two first upper support plates of the inner support component are all symmetrically arranged along the radial center line of the frame.

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