A double-layer spring plate structure and installation method for fully compensated elastic seal of floating roof storage tank

Abstract

The present invention relates to the field of floating roof tank sealing technology, and specifically to a double-layer spring plate structure and installation method for a fully compensated elastic seal of a floating roof tank. The device includes an inner spring plate, an outer spring plate and a sealing unit. The inner spring plate and the outer spring plate are overlapped and arranged along the circumferential direction of the tank wall to form an elastic body. One end of the inner spring plate and the outer spring plate, i.e., the first end, is fixedly arranged on the upper part of the edge plate of the floating vessel by the sealing unit. The other end of the inner spring plate and the outer spring plate, i.e., the second end, extends toward the inner tank wall side of the tank and fits with the inner tank wall of the tank, and extends downward to the lower side of the liquid surface of the storage medium of the tank. The elastically sealed double-layer spring plate structure provided by the present invention improves the sealing effect of the single-layer spring plate in the traditional elastic seal. The outer spring plate increases a limit hook to hook the connection between the inner spring plate and the adjacent outer spring plate, has high fault tolerance, and is not prone to deformation, displacement and other problems between the spring plates after installation, which greatly improves the sealing and operation safety of the tank.

Description

Technical Field

[0001] The invention relates to the technical field of floating roof storage tank sealing, and in particular to a double-layer spring plate structure of a floating roof storage tank full-compensation elastic seal and an installation method thereof. Background Art

[0002] In recent years, the reserve of petroleum energy has increasingly shown its important position in my country's social construction. In recent years, my country has newly built a large number of national oil reserve bases and a large number of oil storage tanks. With the improvement of social requirements for safety and environmental protection, effective sealing measures must be taken in the oil storage area of ​​the oil storage tank and the space connected to the outside. The annular gap between the edge of the floating plate of the floating roof tank and the tank wall is the focus of oil and gas volatilization and loss. The sealing device here must have good sealing performance to reduce oil loss and reduce the safety and environmental problems caused by oil and gas leakage.

[0003] The elastic seal of a floating roof tank is a sealing device with good sealing effect and strong ability to adapt to changes in the annular spacing of the tank. It has been widely used in the sealing of floating roof tanks in recent years. The spring plate that plays a compensatory role in the elastic seal plays an important role in the sealing effect of the tank. The spring plate of the traditional elastic seal is a single-layer stainless steel material. In actual application, the single-layer spring plate is prone to poor sealing effect due to problems such as thinness or insufficient elasticity. The soft sealing interlayer laid on the inside or outside of the single-layer spring plate also has the risk of detaching from the spring plate, making the seal lose its use value and bringing certain risks to the oil and gas storage and safe operation of the tank. At present, a few seals use a double-layer spring plate structure, but it is just a simple superposition of single-layer spring plates. It does not solve the safety problems caused by the complex installation process of the spring plate and the synergy problem between the two layers of spring plates in the seal after installation. Therefore, its sealing performance is not much improved compared with the traditional single-layer spring plate. Summary of the invention

[0004] In order to solve the problems existing in the prior art, one of the purposes of the present invention is to provide a double-layer spring plate structure with full compensation elastic sealing for a floating roof storage tank.

[0005] The present invention adopts the following technical scheme: a double-layer spring plate structure of a fully compensated elastic seal of a floating roof storage tank, comprising an inner spring plate, an outer spring plate and a sealing unit, wherein the inner spring plate and the outer spring plate are overlapped and arranged along the circumferential direction of the tank wall to form an elastic body, one end of the inner spring plate and the outer spring plate, i.e., a first end, is fixedly arranged on the upper part of the edge plate of the floating ship by the sealing unit, and the other end of the inner spring plate and the outer spring plate, i.e., a second end, extends toward the inner tank wall side of the storage tank and fits with the inner tank wall of the storage tank, and extends downward to the lower side of the liquid surface of the storage medium of the storage tank;

[0006] The upper ends of the inner spring plate and the outer spring plate along the tank diameter direction are curved, and the second end of the inner spring plate is connected to the second end of the outer spring plate below the liquid surface of the storage medium in the tank.

[0007] Preferably, the sealing unit comprises an edge support component, a rubber gasket and a first fastener, the edge support component is fixed to the edge plate of the floating vessel, and the first fastener comprises an edge plate bolt and a nut; the edge plate bolt cooperates with the nut to fasten the edge support component, the rubber gasket, the inner spring plate and the outer spring plate to the edge support component;

[0008] The first fasteners are arranged on the edge plate of the floating vessel at intervals along the circumferential direction of the storage tank.

[0009] Preferably, the double-layer spring plate structure also includes a support plate arranged between the rubber gasket and the edge support component, one side of the support plate is fastened to the edge plate of the floating vessel by a sealing unit, and the other side extends obliquely upward toward the tank wall to support the inner spring plate, and the extended end of the support plate is bent downward to form an arc-shaped corner for fitting the downward curved surface of the inner spring plate.

[0010] Preferably, the double-layer spring plate structure further includes a pressure plate, and the sealing unit further includes a U-shaped pressure plate, the opening of the U-shaped pressure plate is pressed downward against the outer spring plate, and the pressure plate is pressed on the top of the outer spring plate; the edge plate bolt passes through the edge support component, the support plate, the rubber gasket, the inner spring plate, the outer spring plate, the U-shaped pressure plate and the pressure plate in sequence, and cooperates with the nut to fasten the inner spring plate, the outer spring plate and the sealing unit together;

[0011] One side of the pressure plate is fastened to the edge plate of the floating vessel by a sealing unit, and the other side extends horizontally toward the tank wall to limit the bending high point of the outer spring plate, and the extension distance of the extension end of the pressure plate exceeds the extension distance of the extension end of the support plate.

[0012] Preferably, each of the inner elastic plate and the outer elastic plate is provided with three mounting holes along the plate width direction at the fixed end on the floating vessel edge plate, an inner flat washer nut is provided on the middle hole of the inner elastic plate, the diameter of the middle hole of the outer elastic plate is larger than the outer diameter of the inner flat washer nut, so that the inner flat washer nut is directly fastened to the inner elastic plate in the middle hole of the outer elastic plate, and outer flat washer nuts are provided on the punching holes on both sides of the middle hole of the outer elastic plate, and the outer flat washer nut is fastened to the outer elastic plate.

[0013] Preferably, the outer spring plate includes a single-hook outer spring plate and a triple-hook outer spring plate, the single-hook outer spring plate has a wide limit hook fixed in the middle of the bottom, the triple-hook outer spring plate has a wide limit hook fixed in the middle of the bottom, the wide limit hook is used to hook the bottom of the inner spring plate, and the triple-hook outer spring plate has a narrow limit hook welded on both sides of the wide limit hook for connecting the triple-hook outer spring plate and the single-hook outer spring plate.

[0014] Preferably, the inner spring plate is an inverted isosceles trapezoidal structure that is wider at the top and narrower at the bottom, and the single-hook outer spring plate and the triple-hook outer spring plate are rectangular structures that are the same width at the top and bottom.

[0015] Preferably, with the distance between two adjacent edge plate bolts being X, the widths of the single-hook outer spring plate, the triple-hook outer spring plate and the inner spring plate meet the following conditions:

[0016] Width of single hook outer spring plate = 3X + width of narrow limit hook;

[0017] The width of the three-hook outer spring plate = 3X + the width of the narrow limit hook;

[0018] The bottom width of the inner spring plate is ≥ the width of the wide limit hook;

[0019] The bottom width of the inner spring plate is less than 3X-2 times the width of the narrow limit hook.

[0020] Preferably, a sealing interlayer is provided between the inner elastic plate and the outer elastic plate.

[0021] The second object of the present invention is to provide a method for installing the double-layer spring plate structure of the above-mentioned floating roof storage tank with full compensation elastic seal, and the specific steps are as follows:

[0022] (1) Fix the edge support component on the floating vessel edge plate, install the support plate and rubber gasket on the edge support component along the circumferential direction of the tank wall, and then install the edge plate bolts on the punched holes of the edge support component;

[0023] (2) Install the inner spring plate along the circumferential direction of the tank wall, punch three holes in the width direction of each inner spring plate to correspond to the three edge plate bolts, and install an inner flat washer nut at the middle hole of the inner spring plate to fasten the inner spring plate to the edge plate of the floating vessel;

[0024] (3) Install the outer spring plate along the circumferential direction of the tank wall. Punch three holes in the upper width direction of each outer spring plate to match the three edge plate bolts sleeved on the inner spring plate. Install a single hook outer spring plate every three edge plate bolts, and install external flat washers and nuts at the punched holes on both sides of the middle hole of the single hook outer spring plate, so that the single hook outer spring plate presses the inner spring plate at the edge plate of the floating boat;

[0025] (4) Adjust the position of the single-hook outer spring plate so that the wide limit hook at the bottom of the single-hook outer spring plate hooks the bottom of the inner spring plate that fits the housing;

[0026] (5) After the single-hook outer spring plate is installed, install the three-hook outer spring plate; install the three-hook outer spring plate on the three edge plate bolts between two adjacent single-hook outer spring plates, and adjust the position of the three-hook outer spring plate so that the wide limit hook at the bottom of the three-hook outer spring plate hooks the bottom of the corresponding inner spring plate on the inside, and the narrow limit hook hooks the overlapping part of the three-hook outer spring plate and the adjacent single-hook outer spring plate;

[0027] (6) Install outer flat washer nuts on both sides of the punched holes of the middle hole of the three-hook outer spring plate, so that the three-hook outer spring plate presses the inner spring plate at the edge plate of the floating ship;

[0028] (7) Adjust the inner and outer spring plates to ensure that they overlap and are pressed tightly, and that the bottom is bent toward the tank wall and fits tightly against the tank wall; if a sealing interlayer is provided between the inner and outer spring plates, the inner and outer spring plates need to clamp the sealing interlayer and bend against the tank wall to fit tightly against the tank wall;

[0029] (8) Install the U-shaped pressure plate and the pressure plate around the tank wall, and install nuts so that the edge support component, the support plate, the rubber gasket, the inner spring plate, the outer spring plate, the U-shaped pressure plate and the pressure plate are fastened as a whole through the edge plate bolts.

[0030] The beneficial effects of the present invention are:

[0031] 1. The double-layer spring plate structure of the fully compensated elastic seal of the floating roof storage tank provided by the present invention greatly improves the sealing effect of the single-layer spring plate in the traditional elastic seal. Based on the high elasticity of the double-layer spring plate, the elastic seal used can adapt to larger annular spacing changes of the storage tank.

[0032] 2. The double-layer spring plate structure provided by the present invention has an outer spring plate with a limit hook that hooks the connection between the inner spring plate and the adjacent outer spring plate. Not only is the installation method simple and safe, but it is also highly operable and fault-tolerant. After installation, deformation and displacement are not likely to occur between the spring plates, which greatly improves the sealing and operation safety of the storage tank.

[0033] 3. The inner spring plate and the outer spring plate can be directly fitted together or sandwiched with a sealing interlayer to further improve the sealing effect of the elastic sealing device. In addition, the double-layer spring plate structure can also avoid direct contact between the sealing interlayer and the tank wall. During the change of the annular gap of the tank, the wear, aging and fracture of the sealing interlayer caused by friction with the tank wall can be effectively reduced, which can effectively improve the safety of the seal while extending the service life of the sealing interlayer. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2A for Figure 1 Enlarged view of part I in A;

[0036] Figure 2B for Figure 1 Enlarged view of part I in B;

[0037] Figure 3 This is a schematic diagram of the installation of the inner spring plate and the outer spring plate of the present invention;

[0038] Figure 4It is a schematic diagram of the structure of a single-hook external spring plate and a triple-hook external spring plate;

[0039] Figure 5 It is a structural schematic diagram of the inner spring plate;

[0040] Figure 6 for Figure 4 Middle A, Figure 5 A magnified view of part B;

[0041] Figure 7 A schematic diagram of the inner spring plate and the outer spring plate being directly attached or sandwiched with a sealing interlayer;

[0042] Figure 8 It is a schematic diagram of the structure in which the sealing interlayer is only arranged between the inner elastic plate and the outer elastic plate in the present invention.

[0043] The meanings of the symbols in the figure are as follows:

[0044] 10-floating edge plate 21-inner spring plate 22-outer spring plate 221-single hook outer spring plate 222-triple hook outer spring plate 31-edge support component 32-rubber gasket 33-U-shaped pressure plate 34-first fastener 341-edge plate bolt 342-nut 343-inner flat washer nut 344-outer flat washer nut 41-support plate 42-pressure plate 61-wide limit hook 62-narrow limit hook 70-sealing interlayer DETAILED DESCRIPTION

[0045] The present invention provides a double-layer spring plate structure with full compensation elastic sealing for a floating roof storage tank, including the following two implementation modes, one of which does not contain a sealing interlayer, and the other contains a sealing interlayer, which can be selected and used by designers according to the specific conditions of the project.

[0046] Two specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings.

[0047] Embodiment 1

[0048] Double-layer spring plate structure without sealing interlayer:

[0049] like Figure 1 A. Figure 2A As shown, a double-layer spring plate structure of a fully compensated elastic seal of a floating roof storage tank includes an inner spring plate 21, an outer spring plate 22 and a sealing unit. The inner spring plate 21 and the outer spring plate 22 are overlapped and arranged along the circumferential direction of the tank wall to form an elastic body. One end of the inner spring plate 21 and the outer spring plate 22, i.e., the first end, is fixedly arranged on the upper part of the floating ship edge plate 10 by the sealing unit. The other end of the inner spring plate 21 and the outer spring plate 22, i.e., the second end, extends toward the inner tank wall side of the storage tank and fits with the inner tank wall of the storage tank, and extends downward to the lower side of the liquid surface of the storage medium of the storage tank.

[0050] The upper ends of the inner spring plate 21 and the outer spring plate 22 along the tank diameter direction are curved, and the second end of the inner spring plate 21 and the second end of the outer spring plate 22 are connected below the liquid surface of the storage medium in the tank.

[0051] The sealing unit includes an edge support component 31, a rubber gasket 32 ​​and a first fastener 34. The edge support component 31 is set as an angle steel and fixed on the floating vessel edge plate 10. The first fastener 34 includes an edge plate bolt 341 and a nut 342. The edge plate bolt 341 cooperates with the nut 342 to fasten the edge support component 31, the rubber gasket 32, the inner spring plate 21, and the outer spring plate 22 to the edge support component 31. The first fastener 34 is evenly arranged on the floating vessel edge plate 10 every 200 mm along the circumferential direction of the storage tank.

[0052] In this embodiment, the double-layer spring plate structure also includes a support plate 41 arranged between the rubber gasket 32 ​​and the edge support component 31. One side of the support plate 41 is fastened to the floating vessel edge plate 10 by a sealing unit, and the other side extends obliquely upward toward the tank wall to support the inner spring plate 21, and the extended end of the support plate 41 is bent downward to form an arc-shaped corner for fitting the downward curved surface of the inner spring plate 21.

[0053] In this embodiment, the double-layer spring plate structure also includes a pressure plate 42, and the sealing unit also includes a U-shaped pressure plate 33. The opening of the U-shaped pressure plate 33 presses downward on the outer spring plate 22, and the pressure plate 42 is pressed on the top of the outer spring plate 22; the edge plate bolt 341 passes through the edge support component 31, the support plate 41, the rubber gasket 32, the inner spring plate 21, the outer spring plate 22, the U-shaped pressure plate 33 and the pressure plate 42 in sequence, and cooperates with the nut 342 to fasten the inner spring plate 21, the outer spring plate 22 and the sealing unit together; the U-shaped pressure plate 33 is used to lift the pressure plate 42 between the pressure plate 42 and the outer spring plate 22, increase the distance between the pressure plate 42 and the outer spring plate 22, and thereby increase the elastic activity space of the outer spring plate 22.

[0054] One side of the pressure plate 42 is fastened to the floating vessel edge plate 10 by a sealing unit, and the other side extends horizontally toward the tank wall to limit the bending high point of the outer spring plate 22, and the extension distance of the extension end of the pressure plate 42 exceeds the extension distance of the extension end of the support plate 41.

[0055] The rubber gasket 32 ​​is made of nitrile or fluororubber material to improve the sealing effect between the support plate 41 and the inner spring plate 21; the U-shaped pressure plate 33 presses the outer spring plate 22 and adjusts the height so that the spring plate can achieve the use effect within the effective space; the pressure plate 42 extends outward from the side close to the tank wall to at least exceed the high point of the outer spring plate 22 to prevent permanent deformation that may be caused by the transition bulge of the inner and outer spring plates; the material of the inner and outer spring plates 21 and 22 are both S30110 high-elastic stainless steel plates.

[0056] like Figure 3-Figure 6 , Figure 7 As shown in FIG. 1 , each inner spring plate 21 and outer spring plate 22 is provided with three mounting holes at the fixed end on the floating vessel edge plate 10 along the plate width direction, an inner flat washer nut 343 is provided on the middle hole of the inner spring plate 21, and the diameter of the middle hole of the outer spring plate 22 is larger than the outer diameter of the inner flat washer nut 343, so that the inner flat washer nut 343 is directly fastened to the inner spring plate 21 in the middle hole of the outer spring plate 22, and outer flat washer nuts 344 are provided on the punching holes on both sides of the middle hole of the outer spring plate 22, and the outer flat washer nuts 344 are fastened to the outer spring plate 22.

[0057] The outer elastic plate 22 also includes a single-hook outer elastic plate 221 and a triple-hook outer elastic plate 222. The single-hook outer elastic plate 221 is fixedly connected to a wide limit hook 61 in the middle of the bottom, and the triple-hook outer elastic plate 222 is fixedly connected to a wide limit hook 61 in the middle of the bottom. The wide limit hook 61 is 100 mm wide and is used to hook the bottom of the inner elastic plate 21. The triple-hook outer elastic plate 222 is welded with a narrow limit hook 62 on both sides of the wide limit hook 61 for connecting the triple-hook outer elastic plate 222 and the single-hook outer elastic plate. The width of the narrow limit hook 62 is 40 mm.

[0058] The limit hook is made of stainless steel with a thickness of 1.2 mm, and is welded to the outer spring plate 22 by butt welding, or by punching a number of small holes and spot welding.

[0059] The inner spring plate 21 is a structure that is wide at the top and narrow at the bottom, with an upper width of 596 mm and a bottom width of 298 mm. The upper and lower widths of the single-hook outer spring plate 21 and the three-hook outer spring plate 22 are both 640 mm. The thickness of the inner spring plate 21 and the outer spring plate 22 is 0.8 mm.

[0060] A section of about 40 mm long at the bottom of the inner spring plate 21 and the outer spring plate 22 is bent away from the tank wall to form an angle of about 30° with the tank wall. The welding part between the outer spring plate 22 and the limit hook is about 20 mm long.

[0061] The above-mentioned method for installing a double-layer spring plate structure with full compensation elastic seal of a floating roof storage tank without a sealing interlayer has the following specific steps:

[0062] (1) Fix the edge support component 31 on the floating vessel edge plate 10, install the support plate 41 and the rubber gasket 32 ​​on the edge support component 31 along the circumferential direction of the tank wall, and then install the edge plate bolts 341 on the punched holes of the edge support component 31;

[0063] (2) Install the inner spring plate 21 along the circumferential direction of the tank wall, punch three holes along the width direction of each inner spring plate 21 to correspond to the three edge plate bolts 341, and install an inner flat washer nut 343 at the middle hole of the inner spring plate 21 to fasten the inner spring plate 21 to the edge plate 10 of the floating vessel;

[0064] (3) Install the outer spring plate 22 along the circumferential direction of the tank wall. Punch three holes along the width direction of each outer spring plate 22 to match the three edge plate bolts 341 sleeved on the inner spring plate 21. Install a single hook outer spring plate 221 every three edge plate bolts 341, and install outer flat washer nuts 344 at the punched holes on both sides of the middle hole of the single hook outer spring plate 221, so that the single hook outer spring plate 221 presses the inner spring plate 21 at the edge plate 10 of the floating ship;

[0065] (4) Adjust the position of the single-hook outer spring plate 221 so that the wide limit hook 61 at the bottom of the single-hook outer spring plate 221 hooks the bottom of the inner spring plate 21 that is in contact with the single-hook outer spring plate 221;

[0066] (5) After the single-hook outer spring plate 221 is installed, install the triple-hook outer spring plate 222; install the triple-hook outer spring plate 222 on the three edge plate bolts 341 between two adjacent single-hook outer spring plates 221, and adjust the position of the triple-hook outer spring plate 222 so that the wide limit hook 61 at the bottom of the triple-hook outer spring plate 222 hooks the bottom of the corresponding inner spring plate 21 on the inner side, and the narrow limit hook 62 hooks the overlapping part of the triple-hook outer spring plate 222 and the adjacent single-hook outer spring plate 221;

[0067] (6) Install the outer flat washer nuts 344 at the punched holes on both sides of the middle hole of the three-hook outer spring plate 222, so that the three-hook outer spring plate 222 presses the inner spring plate 21 at the edge plate 10 of the floating ship;

[0068] (7) Adjust the inner spring plate 21 and the outer spring plate 22 to ensure that they overlap and are pressed tightly, and the bottom is bent toward the tank wall and fits tightly to the tank wall;

[0069] (8) Install the U-shaped pressure plate 33 and the pressure plate 42 around the tank wall, and install the nut 342 so that the edge support component 31, the support plate 41, the rubber gasket 32, the inner spring plate 21, the outer spring plate 22, the U-shaped pressure plate 33 and the pressure plate 42 are fastened into a whole through the edge plate bolts 341.

[0070] In this embodiment, since the spacing between the edge plate bolts 341 is set at 200mm, after installation, the natural gap between the two adjacent inner elastic plates 21 at the edge plate is 4mm, the width of the outer elastic plate 22 is uniformly 640mm, and the overlapping part width of the two adjacent outer elastic plates 22 is 40mm, which is hooked by a narrow limit hook 62 with a width of 40mm.

[0071] Embodiment 2

[0072] Double-layer spring plate structure with sealed interlayer:

[0073] like Figure 1 B. Figure 2B , Figure 7As shown in B, a double-layer spring plate structure of a fully compensated elastic seal of a floating roof storage tank includes an inner spring plate 21, an outer spring plate 22 and a sealing unit. The inner spring plate 21 and the outer spring plate 22 are overlapped and arranged along the circumferential direction of the tank wall to form an elastic body. One end of the inner spring plate 21 and the outer spring plate 22, i.e., the first end, is fixedly arranged on the upper part of the floating vessel edge plate 10 by the sealing unit. The other end of the inner spring plate 21 and the outer spring plate 22, i.e., the second end, extends toward the inner tank wall side of the storage tank and fits with the inner tank wall of the storage tank, and extends downward to the lower side of the liquid surface of the storage medium of the storage tank;

[0074] The upper ends of the inner spring plate 21 and the outer spring plate 22 along the tank diameter direction are curved, and the second end of the inner spring plate 21 and the second end of the outer spring plate 22 are connected below the liquid surface of the storage medium in the tank.

[0075] A sealing interlayer 70 is sandwiched between the inner spring plate 21 and the outer spring plate 22. The sealing interlayer 70 is set as a rubber sealing diaphragm. One end of the rubber sealing diaphragm 70, i.e., the first end, is fixedly clamped by the sealing unit in the first ends of the inner spring plate 21 and the outer spring plate 22. The rubber sealing diaphragm 70 is clamped by the inner spring plate 21 and the outer spring plate 22, and is bent toward the tank wall side together with the inner spring plate 21 and the outer spring plate 22 and fits with the tank wall, extending below the liquid level of the storage medium in the storage tank, and then drawn upward from the bottom of the inner spring plate 21 to cover the liquid level of the storage medium in the storage tank. The rubber sealing diaphragm 70 extends upward and in contact with the liquid surface to the outer side of the floating edge plate 10. The rubber sealing diaphragm 70 is provided with a fold section that is convenient for stretching in the radial direction of the storage tank at the liquid surface of the storage tank storage medium; the lower end of the rubber sealing diaphragm 70 located at the outer side of the floating edge plate 10 extends upward along the outer side of the floating edge plate 10 and forms the other end of the rubber sealing diaphragm 70, that is, the second end; the second end of the rubber sealing diaphragm 70 is fixedly connected to the first end through a sealing unit, and the rubber sealing diaphragm 70 encloses an oil-free and gas-free closed space;

[0076] The sealing unit includes an edge support component 31, a rubber gasket 32 ​​and a first fastener 34. The edge support component 31 is set as an angle steel and fixed on the floating vessel edge plate 10. The first fastener 34 includes an edge plate bolt 341 and a nut 342. The edge plate bolt 341 cooperates with the nut 342 to fasten the edge support component 31, the rubber gasket 32, the inner spring plate 21, the first end of the rubber sealing diaphragm 70, and the outer spring plate 22 to the edge support component 31. The first fastener 34 is evenly arranged on the floating vessel edge plate 10 every 200 mm along the circumferential direction of the storage tank.

[0077] In this embodiment, the double-layer spring plate structure also includes a support plate 41 arranged between the rubber gasket 32 ​​and the edge support component 31. One side of the support plate 41 is fastened to the floating vessel edge plate 10 by a sealing unit, and the other side extends obliquely upward toward the tank wall to support the inner spring plate 21, and the extended end of the support plate 41 is bent downward to form an arc-shaped corner for fitting the downward curved surface of the inner spring plate 21.

[0078] In this embodiment, the double-layer spring plate structure also includes a pressure plate 42, and the sealing unit also includes a U-shaped pressure plate 33. The opening of the U-shaped pressure plate 33 presses downward on the outer spring plate 22, and the pressure plate 42 is pressed on the top of the outer spring plate 22; the edge plate bolt 341 passes through the edge support component 31, the support plate 41, the rubber gasket 32, the inner spring plate 21, the outer spring plate 22, the U-shaped pressure plate 33 and the pressure plate 42 in sequence, and cooperates with the nut 342 to fasten the inner spring plate 21, the outer spring plate 22 and the sealing unit together; the U-shaped pressure plate 33 is used to lift the pressure plate 42 between the pressure plate 42 and the outer spring plate 22, increase the distance between the pressure plate 42 and the outer spring plate 22, and thereby increase the elastic activity space of the outer spring plate 22.

[0079] The second end of the rubber sealing membrane 70 is located between the support plate 41 and the edge support member 31 at the floating vessel edge plate 10 .

[0080] In this embodiment, Figure 3-Figure 6 As shown, the structures of the inner spring plate 21 and the outer spring plate 22 are the same as those in the first embodiment, and will not be described in detail herein.

[0081] The above-mentioned method for installing a double-layer spring plate structure with full compensation elastic seal of a floating roof storage tank containing a sealing interlayer has the following specific steps:

[0082] (1) Fix the edge support component 31 on the floating vessel edge plate 10; after punching the rubber sealing diaphragm 70, the punched holes are matched with the edge plate holes one by one, and the support plate 41 and the edge plate bolts 341 are installed on the edge support component 31 along the circumferential direction of the tank wall, and thin nuts are installed on the support plate 41 to tighten, and rubber gaskets 32 are placed along the circumferential direction of the tank wall to ensure that all thin nuts are placed in the holes of the rubber gaskets 32;

[0083] (2) Install the inner spring plate 21 along the circumferential direction of the tank wall, punch three holes on each inner spring plate 21 corresponding to the three edge plate bolts 341, and install an inner flat washer nut 343 at the middle hole of the inner spring plate 21 to fasten the inner spring plate 21 to the edge plate 10 of the floating vessel;

[0084] (3) After punching a hole at the first end of the rubber sealing diaphragm 70, the hole at the first end of the rubber sealing diaphragm 70 is placed on the edge plate bolt 341, and the rubber sealing diaphragm 70 is adjusted so that the rubber sealing diaphragm 70 is evenly attached to the surface of the inner spring plate 21;

[0085] (4) Install the outer spring plate 22 along the circumferential direction of the tank wall. Punch three holes along the width direction of each outer spring plate 22 to match the three edge plate bolts 341 sleeved on the inner spring plate 21. Install a single hook outer spring plate 221 every three edge plate bolts 341, and install outer flat washer nuts 344 at the punched holes on both sides of the middle hole of the single hook outer spring plate 221, so that the single hook outer spring plate 221 presses the inner spring plate 21 at the edge plate 10 of the floating ship;

[0086] (5) Adjust the position of the single-hook outer spring plate 221 so that the wide limit hook 61 at the bottom of the single-hook outer spring plate 221 hooks the bottom of the inner spring plate 21 that is in contact with the single-hook outer spring plate 221;

[0087] (6) After the single-hook outer spring plate 221 is installed, install the triple-hook outer spring plate 222. Install the triple-hook outer spring plate 222 on the three edge plate bolts 341 between two adjacent single-hook outer spring plates 221, and adjust the position of the triple-hook outer spring plate 222 so that the wide limit hook 61 at the bottom of the triple-hook outer spring plate 222 hooks the bottom of the corresponding inner spring plate 21, and the narrow limit hook 62 hooks the overlapping part of the triple-hook outer spring plate 222 and the adjacent single-hook outer spring plate 221;

[0088] (7) Install the outer flat washer nuts 344 at the punched holes on both sides of the middle hole of the three-hook outer spring plate 222, so that the three-hook outer spring plate 222 presses the inner spring plate 21 at the edge plate 10 of the floating ship;

[0089] (8) Adjust the positions of the outer spring plate 22 and the inner spring plate 21 to ensure that they clamp the rubber sealing diaphragm 70 together and the contact surface is flat and wrinkle-free, so that the outer spring plate 22 fits evenly on the surface of the rubber sealing diaphragm 30, and the bottoms of the outer spring plate 22 and the inner spring plate 21 are bent toward the tank wall and fit tightly against the tank wall.

[0090] (9) Install the U-shaped pressure plate 33 and the pressure plate 42 along the tank wall, and install the flat washer 93 and the nut 342, so that the edge support component 31, the second end of the rubber sealing diaphragm 70, the support plate 41, the rubber gasket 32, the inner spring plate 21, the first end of the rubber sealing diaphragm 70, the outer spring plate 22, the U-shaped pressure plate 33 and the pressure plate 42 are fastened into a whole by the edge plate bolts 341.

[0091] In this embodiment, the sealing interlayer 70 may also be disposed only between the inner elastic plate 21 and the outer elastic plate 22, and the sealing interlayer 70 is not led upward from the lower end of the inner elastic plate 21. Figure 8 shown.

[0092] The above numerical values ​​are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer spring plate structure with full compensation elastic seal for a floating roof storage tank, characterized in that: The invention comprises an inner spring plate (21), an outer spring plate (22) and a sealing unit, wherein the inner spring plate (21) and the outer spring plate (22) are overlapped and arranged along the circumferential direction of the tank wall to form an elastic body, one end of the inner spring plate (21) and the outer spring plate (22), i.e. a first end, is fixedly arranged on the upper part of the floating vessel edge plate (10) by the sealing unit, and the other end of the inner spring plate (21) and the outer spring plate (22), i.e. a second end, extends toward the inner tank wall side of the tank and fits with the inner tank wall of the tank, and extends downward to the lower side of the liquid surface of the storage medium of the tank; The upper ends of the inner spring plate (21) and the outer spring plate (22) along the radial direction of the storage tank are curved, and the second end of the inner spring plate (21) and the second end of the outer spring plate (22) are connected below the liquid surface of the storage medium in the storage tank; The fixed end of each of the inner spring plate (21) and the outer spring plate (22) on the floating ship edge plate (10) is provided with three mounting holes along the plate width direction; an inner flat washer nut (343) is provided on the middle hole of the inner spring plate (21); the diameter of the middle hole of the outer spring plate (22) is larger than the outer diameter of the inner flat washer nut (343), so that the inner flat washer nut (343) is directly fastened to the inner spring plate (21) in the middle hole of the outer spring plate (22); outer flat washer nuts (344) are provided on the punching holes on both sides of the middle hole of the outer spring plate (22); and the outer flat washer nuts (344) are fastened to the outer spring plate (22); The outer spring plate (22) comprises a single-hook outer spring plate (221) and a triple-hook outer spring plate (222); a wide limit hook (61) is fixedly connected in the middle of the bottom of the single-hook outer spring plate (221); a wide limit hook (61) is fixedly connected in the middle of the bottom of the triple-hook outer spring plate (222); the wide limit hook (61) is used to hook the bottom of the inner spring plate (21); and a narrow limit hook (62) for connecting the triple-hook outer spring plate (222) and the single-hook outer spring plate (221) is welded on both sides of the wide limit hook (61). The inner spring plate (21) is an inverted isosceles trapezoidal structure that is wide at the top and narrow at the bottom, and the single-hook outer spring plate (221) and the triple-hook outer spring plate (222) are rectangular structures that are the same width at the top and bottom. A sealing interlayer (70) is sandwiched between the inner elastic plate (21) and the outer elastic plate (22).

2. A double-layer spring plate structure with full compensation elastic seal for a floating roof storage tank as claimed in claim 1, characterized in that: The sealing unit comprises an edge support component (31), a rubber gasket (32) and a first fastener (34); the edge support component (31) is fixed on the floating vessel edge plate (10); the first fastener (34) comprises an edge plate bolt (341) and a nut (342); the edge plate bolt (341) cooperates with the nut (342) to fasten the edge support component (31), the rubber gasket (32), the inner spring plate (21) and the outer spring plate (22) to the edge support component (31); The first fasteners (34) are arranged on the floating vessel edge plate (10) at intervals along the circumferential direction of the storage tank.

3. A double-layer spring plate structure with full compensation elastic seal for a floating roof storage tank as claimed in claim 2, characterized in that: The double-layer spring plate structure also includes a support plate (41) arranged between the rubber gasket (32) and the edge support component (31); one side of the support plate (41) is fastened to the floating vessel edge plate (10) by a sealing unit, and the other side extends obliquely upward toward the tank wall to support the inner spring plate (21); and the extended end of the support plate (41) is bent downward to form an arc-shaped angle to fit the downward curved surface of the inner spring plate (21).

4. A double-layer spring plate structure with full compensation elastic seal for a floating roof storage tank as claimed in claim 3, characterized in that: The double-layer spring plate structure also includes a pressure plate (42), and the sealing unit also includes a U-shaped pressure plate (33), the opening of the U-shaped pressure plate (33) is pressed downwardly against the outer spring plate (22), and the pressure plate (42) is pressed on the top of the outer spring plate (22); the edge plate bolt (341) passes through the edge support component (31), the support plate (41), the rubber gasket (32), the inner spring plate (21), the outer spring plate (22), the U-shaped pressure plate (33) and the pressure plate (42) in sequence, and cooperates with the nut (342) to fasten the inner spring plate (21), the outer spring plate (22) and the sealing unit together; One side of the pressure plate (42) is fastened to the floating vessel edge plate (10) by a sealing unit, and the other side extends horizontally toward the tank wall to limit the bending high point of the outer spring plate (22), and the extension distance of the extension end of the pressure plate (42) exceeds the extension distance of the extension end of the support plate (41).

5. A double-layer spring plate structure with full compensation elastic seal for a floating roof storage tank as claimed in any one of claims 1 to 4, characterized in that: Taking the distance between two adjacent edge plate bolts (341) as X, the widths of the single-hook outer spring plate (221), the triple-hook outer spring plate (222) and the inner spring plate (21) satisfy the following conditions: The width of the single hook outer spring plate (221) = 3X + the width of the narrow limit hook (62); The width of the three-hook outer spring plate (222) = 3X + the width of the narrow limit hook (62); The bottom width of the inner spring plate (21) is greater than or equal to the width of the wide limit hook (61); The bottom width of the inner spring plate (21) is less than 3X-2 times the width of the narrow limit hook (62).

6. A method for installing a double-layer spring plate structure with full compensation elastic seal of a floating roof storage tank as claimed in claim 4, characterized in that: Here are the steps: (1) fixing the edge support component (31) on the floating vessel edge plate (10), installing the support plate (41) and the rubber gasket (32) on the edge support component (31) along the circumferential direction of the tank wall, and then installing the edge plate bolts (341) on the punched holes of the edge support component (31); (2) installing inner spring plates (21) along the circumferential direction of the tank wall, punching three holes on each inner spring plate (21) along the plate width direction corresponding to the three edge plate bolts (341), and installing an inner flat washer nut (343) at a middle hole of the inner spring plate (21), and fastening the inner spring plate (21) to the floating vessel edge plate (10); (3) Install the outer spring plate (22) along the circumferential direction of the tank wall, and punch three holes on each outer spring plate (22) along the plate width direction to match the three edge plate bolts (341) sleeved on the inner spring plate (21). Install a single hook outer spring plate (221) every three edge plate bolts (341), and install outer flat washer nuts (344) at the punched holes on both sides of the middle hole of the single hook outer spring plate (221), so that the single hook outer spring plate (221) presses the inner spring plate (21) at the edge plate (10) of the floating ship; (4) adjusting the position of the single-hook outer spring plate (221) so that the wide limit hook (61) at the bottom of the single-hook outer spring plate (221) hooks the bottom of the inner spring plate (21) in contact with the single-hook outer spring plate (221); (5) After the single hook outer spring plate (221) is installed, install the triple hook outer spring plate (222); install the triple hook outer spring plate (222) on the three edge plate bolts (341) between two adjacent single hook outer spring plates (221), and adjust the position of the triple hook outer spring plate (222) so that the wide limit hook (61) at the bottom of the triple hook outer spring plate (222) hooks the bottom of the corresponding inner spring plate (21) on the inside, and the narrow limit hook (62) hooks the overlapping part of the triple hook outer spring plate (222) and the adjacent single hook outer spring plate (221); (6) Installing outer flat washer nuts (344) at the punching holes on both sides of the middle hole of the three-hook outer spring plate (222) so that the three-hook outer spring plate (222) presses the inner spring plate (21) against the edge plate (10) of the floating ship; (7) Adjust the inner spring plate (21) and the outer spring plate (22) to ensure that they overlap and are pressed tightly, and the bottom is bent toward the tank wall and fits tightly against the tank wall; if a sealing interlayer (70) is provided between the inner spring plate (21) and the outer spring plate (22), the inner spring plate (21) and the outer spring plate (22) need to clamp the intermediate sealing interlayer (70) and bend toward the tank wall to fit tightly against the tank wall; (8) A U-shaped pressure plate (33) and a pressure plate (42) are installed around the tank wall, and nuts (342) are installed so that the edge support component (31), the support plate (41), the rubber gasket (32), the inner spring plate (21), the outer spring plate (22), the U-shaped pressure plate (33) and the pressure plate (42) are fastened into a whole through the edge plate bolts (341).

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