阅读说明：本技术 一种浮顶储罐全补偿弹性密封的双层弹板结构及安装方法 (Double-layer elastic plate structure for full-compensation elastic sealing of floating roof storage tank and installation method ) 是由 徐礼义 章桂生 杨瑞楼 焦士六 李勇 陶钧 王琳 于 2020-04-20 设计创作，主要内容包括：本发明涉及浮顶储罐密封技术领域,具体涉及一种浮顶储罐全补偿弹性密封的双层弹板结构及安装方法。该装置包括内弹板、外弹板和密封单元,内弹板和外弹板重叠设置且二者沿储罐罐壁圆周方向排布形成一个弹性体,内弹板和外弹板的一端即第一端由密封单元固定设置于浮船边缘板的上部,内弹板和外弹板的另一端即第二端向储罐的内罐壁侧延伸并与储罐的内罐壁贴合,且向下伸展至储罐储存介质的液面下侧。本发明提供的弹性密封的双层弹板结构改善了传统弹性密封中单层弹板的密封效果,外弹板增加限位钩勾住内弹板和相邻外弹板的连接处,容错性高,安装完成后弹板间不易发生变形、移位等问题,大大提高了储罐的密封性和运行的安全性。(The invention relates to the technical field of floating roof storage tank sealing, in particular to a double-layer elastic plate structure for full-compensation elastic sealing of a floating roof storage tank and an installation method. The device is including interior springboard, play board and sealed unit outward, and interior springboard overlaps with outer springboard and sets up and the two forms an elastomer of arranging along storage tank wall circumferencial direction, and the one end of interior springboard and outer springboard is first end promptly and is fixed by sealed unit and set up in the upper portion of pontoon edge board, and the other end of interior springboard and outer springboard promptly the second end extend to the interior tank wall side of storage tank and laminate with the interior tank wall of storage tank, and extend to the liquid level downside of storage tank storage medium downwards. The elastic sealing double-layer elastic plate structure provided by the invention improves the sealing effect of a single-layer elastic plate in the traditional elastic sealing, the limit hook is additionally arranged on the outer elastic plate to hook the joint of the inner elastic plate and the adjacent outer elastic plate, the fault tolerance is high, the elastic plates are not easy to deform, shift and the like after installation, and the sealing performance and the operation safety of the storage tank are greatly improved.)

1. The utility model provides a floating roof storage tank full compensation elastic seal's double-deck bullet board structure which characterized in that: the floating storage tank comprises an inner elastic plate (21), an outer elastic plate (22) and a sealing unit, wherein the inner elastic plate (21) and the outer elastic plate (22) are overlapped and are distributed along the circumferential direction of the wall of the storage tank to form an elastic body, one end, namely a first end, of each of the inner elastic plate (21) and the outer elastic plate (22) is fixedly arranged on the upper part of a floating pontoon edge plate (10) through the sealing unit, and the other end, namely a second end, of each of the inner elastic plate (21) and the outer elastic plate (22) extends towards the inner tank wall side of the storage tank and is attached to the inner tank wall of the storage tank and extends downwards to the lower side of the liquid level of storage media of the storage tank;

the upper ends of the inner elastic plate (21) and the outer elastic plate (22) in the radial direction of the storage tank are bent, and the second end of the inner elastic plate (21) is connected with the second end of the outer elastic plate (22) at the lower side of the liquid level of the storage medium in the storage tank.

2. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof storage tank as claimed in claim 1, wherein: the sealing unit comprises an edge supporting part (31), a rubber gasket (32) and a first fastener (34), wherein the edge supporting part (31) is fixed on a floating vessel edge plate (10), and the first fastener (34) comprises an edge plate bolt (341) and a nut (342); the edge plate bolt (341) is matched with the nut (342) to fasten the edge support part (31), the rubber gasket (32), the inner elastic plate (21) and the outer elastic plate (22) on the edge support part (31);

the first fasteners (34) are arranged on the edge plate (10) of the floating pontoon at intervals along the circumferential direction of the storage tank.

3. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof storage tank as claimed in claim 2, wherein: the double-layer elastic plate structure further comprises a support plate (41) arranged between the rubber gasket (32) and the edge supporting part (31), one side of the support plate (41) is fastened at the position of the edge plate (10) of the floating pontoon by a sealing unit, the other side of the support plate extends obliquely upwards towards the direction of the wall of the storage tank and is used for supporting the inner elastic plate (21), and the extending tail end of the support plate (41) bends downwards to form an arc-shaped bend angle and is used for being attached to the downward-bent cambered surface of the inner elastic plate (21).

4. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof storage tank as claimed in claim 3, wherein: the double-layer elastic plate structure further comprises a pressing plate (42), the sealing unit further comprises a U-shaped pressing plate (33), an opening of the U-shaped pressing plate (33) is pressed against the outer elastic plate (22) downwards, and the pressing plate (42) is arranged at the top of the outer elastic plate (22) in a pressing mode; the edge plate bolt (341) sequentially penetrates through the edge support part (31), the support plate (41), the rubber gasket (32), the inner elastic plate (21), the outer elastic plate (22), the U-shaped pressing plate (33) and the pressing plate (42), and is matched with the nut (342) to fasten the inner elastic plate (21), the outer elastic plate (22) and the sealing unit together;

one side of the pressure plate (42) is fastened on the edge plate (10) of the floating pontoon by a sealing unit, the other side horizontally extends towards the tank wall direction of the storage tank and is used for limiting the bending high point of the external springing 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 supporting bracket plate (41).

5. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof storage tank as claimed in claim 1, wherein: the fixing ends of each inner elastic plate (21) and each outer elastic plate (22) on the edge plate (10) of the floating vessel are provided with three mounting holes along the plate width direction, an inner flat washer nut (343) is arranged on a hole in the middle of each inner elastic plate (21), the diameter of a hole in the middle of each outer elastic 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 on the inner elastic plate (21) in the hole in the middle of each outer elastic plate (22), outer flat washer nuts (344) are arranged on both sides of the hole in the middle of each outer elastic plate (22) in a punched mode, and the outer flat washer nuts (344) are fastened on the outer elastic plates (22).

6. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof tank as claimed in claim 5, wherein: outer diving board (22) play board (222) outward including single hook bullet board (221) and three hooks outward, the positive rigid coupling in the middle of single hook bullet board (221) bottom has a wide spacing hook (61) outward, the rigid coupling has a wide spacing hook (61) in the middle of three hooks play board (222) bottom outward, and wide spacing hook (61) are used for catching on interior diving board (21) bottom, play board (222) outside the three hooks lie in each welding one in wide spacing hook (61) both sides is used for playing board (222) and single hook outward and plays narrow spacing hook (62) that board (221) are connected outward with the three hooks.

7. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof tank as claimed in claim 5 or 6, wherein: the inner springboard (21) is of an inverted isosceles trapezoid structure with a wide upper part and a narrow lower part, and the single-hook outer springboard (221) and the three-hook outer springboard (222) are of rectangular structures with the same width from top to bottom.

8. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof tank as claimed in the claims 1 to 6, wherein: taking the distance between two adjacent edge plate bolts (341) as X, the widths of the single-hook outer springing plate (221), the three-hook outer springing plate (222) and the inner springing plate (21) meet the following conditions:

the width of the single-hook outer springboard (221) is 3X + the width of the narrow limiting hook (62);

the width of the three-hook outer springboard (222) is 3X + the width of the narrow limit hook (62);

the width of the bottom of the inner springboard (21) is more than or equal to the width of the wide limit hook (61);

the width of the bottom of the inner springboard (21) is less than 3X-2 times of the width of the narrow limiting hook (62).

9. The double-layer elastic plate structure of the full compensation elastic sealing of the floating roof storage tank as claimed in claim 1, wherein: and a sealing interlayer (70) is clamped between the inner elastic plate (21) and the outer elastic plate (22).

10. The method for installing the double-layer elastic plate structure of the full compensation elastic sealing of the floating roof tank as claimed in any one of claims 1 to 6, is characterized by comprising the following steps:

(1) fixing an edge support part (31) on a floating vessel edge plate (10), installing a support bracket plate (41) and a rubber gasket (32) on the edge support part (31) along the circumferential direction of the tank wall, and then installing an edge plate bolt (341) on a punched hole of the edge support part (31);

(2) installing inner elastic plates (21) along the circumferential direction of the tank wall, punching three holes in each inner elastic plate (21) along the plate width direction to correspond to the three edge plate bolts (341), installing an inner flat washer nut (343) at a hole in the middle of each inner elastic plate (21), and fastening the inner elastic plates (21) at the edge plates (10) of the floating vessel;

(3) installing outer elastic plates (22) along the circumferential direction of the tank wall, correspondingly punching three holes on each outer elastic plate (22) along the plate width direction to match with three edge plate bolts (341) sleeved on the inner elastic plate (21), installing a single-hook outer elastic plate (221) every other three edge plate bolts (341), and installing outer flat washer nuts (344) at the two sides of a hole in the middle of the single-hook outer elastic plate (221) so that the single-hook outer elastic plate (221) compresses the inner elastic plate (21) at the edge plate (10) of the pontoon;

(4) adjusting the position of the single-hook outer springboard (221) to enable a width limiting hook (61) at the bottom of the single-hook outer springboard (221) to hook the bottom of the attached inner springboard (21);

(5) after the single-hook outer springboard (221) is installed, a three-hook outer springboard (222) is installed; mounting the three-hook outer springboard (222) on three edge board bolts (341) between two adjacent single-hook outer springboards (221), adjusting the position of the three-hook outer springboard (222), enabling a wide limiting hook (61) at the bottom of the three-hook outer springboard (222) to hook the bottom of the corresponding inner springboard (21) at the inner side, and enabling a narrow limiting hook (62) to hook the overlapped part of the three-hook outer springboard (222) and the adjacent single-hook outer springboard (221);

(6) outer flat washer nuts (344) are arranged at punching holes on two sides of a hole in the middle of the three-hook outer elastic plate (222), so that the three-hook outer elastic plate (222) is tightly pressed on the inner elastic plate (21) at the position of the edge plate (10) of the floating pontoon;

(7) adjusting the inner elastic plate (21) and the outer elastic plate (22) to ensure that the two are overlapped and pressed, and the bottom of the inner elastic plate and the bottom of the outer elastic plate are bent towards the tank wall and tightly attached to the tank wall; if a sealing interlayer (70) is arranged between the inner elastic plate (21) and the outer elastic plate (22), the inner elastic plate (21) and the outer elastic plate (22) need to clamp the middle sealing interlayer (70) and bend towards the tank wall to be tightly attached to the tank wall;

(8) a U-shaped pressing plate (33) and a pressing plate (42) are arranged along the periphery of the tank wall, and nuts (342) are arranged, so that the edge supporting part (31), the supporting plate (41), the rubber gasket (32), the inner elastic plate (21), the outer elastic plate (22), the U-shaped pressing plate (33) and the pressing plate (42) are fastened into a whole through the edge plate bolts (341).

Technical Field

The invention relates to the technical field of floating roof storage tank sealing, in particular to a double-layer elastic plate structure for full-compensation elastic sealing of a floating roof storage tank and an installation method.

Background

In recent years, the storage of petroleum energy shows more and more important places in the social construction of China, and a large number of national petroleum storage bases are newly built in China in recent years to build a large number of petroleum storage tanks. With the improvement of the social requirements on safety and environmental protection, effective sealing measures are required to be taken in the space communicated with the outside in the oil storage area of the oil storage tank. The annular gap between the edge of the floating plate of the floating roof storage tank and the tank wall is the key point of volatilization and loss of oil gas, and the sealing device at the position has good sealing performance so as to reduce the loss of oil products and reduce the safety and environmental problems caused by oil gas leakage.

The elastic seal of the floating roof storage tank is a sealing device which has good sealing effect and strong ability of adapting to the change of the annular space of the storage tank, and is widely applied to the sealing of the floating roof storage tank in recent years. Play the plays compensating action's diving board and have an important role in the sealed effect of storage tank among the elastic seal, traditional elastic seal's diving board is individual layer stainless steel, and in practical application, individual layer diving board is thin or elasticity not enough scheduling problem leads closely the sealed effect not good because of single easily, and in the soft sealed intermediate layer that individual layer diving board inboard or outside laid, also has the risk that breaks away from the diving board, makes sealed the use value that loses, brings certain risk for the oil gas storage and the safe operation of storage tank. At present, a few of seals use a double-layer elastic plate structure, but only the simple superposition of single-layer elastic plates, and the safety problem caused by the complex installation process of the elastic plates and the cooperativity problem between the two layers of elastic plates in the sealing after the installation are not solved, so that the sealing performance of the elastic plates is not greatly improved compared with the traditional single-layer elastic plates.

Disclosure of Invention

In order to solve the problems in the prior art, one of the purposes of the invention is to provide a double-layer elastic plate structure for fully compensating elastic sealing of a floating roof storage tank.

The invention adopts the following technical scheme: a floating roof storage tank full-compensation elastic sealing double-layer elastic plate structure comprises an inner elastic plate, an outer elastic plate and a sealing unit, wherein the inner elastic plate and the outer elastic plate are arranged in an overlapping mode and are distributed along the circumferential direction of a storage tank wall to form an elastic body;

the upper ends of the inner spring plate and the outer spring plate in the radial direction of the storage tank are bent, and the second end of the inner spring plate is connected with the second end of the outer spring plate at the lower side of the liquid level of a storage medium in the storage tank.

Preferably, the sealing unit comprises an edge support member fixed to the edge plate of the floating vessel, a rubber gasket, and a first fastener including an edge plate bolt and a nut; the edge plate bolt is matched with the nut to fasten the edge support component, the rubber gasket, the inner elastic plate and the outer elastic plate on the edge support component;

the first fasteners are arranged on the edge plate of the floating pontoon at intervals along the circumferential direction of the storage tank.

Preferably, the double-layer elastic plate structure further comprises a support plate arranged between the rubber gasket and the edge support part, one side of the support plate is fastened at the edge plate of the floating pontoon by a sealing unit, the other side of the support plate extends obliquely upwards towards the tank wall of the storage tank to support the inner elastic plate, and the extending end of the support plate is bent downwards to form an arc-shaped bent angle to be attached to a downward-bent cambered surface of the inner elastic plate.

Preferably, the double-layer elastic plate structure further comprises a pressing plate, the sealing unit further comprises a U-shaped pressing plate, an opening of the U-shaped pressing plate is pressed downwards against the outer elastic plate, and the pressing plate is pressed on the top of the outer elastic plate; the edge plate bolt sequentially penetrates through the edge supporting part, the supporting plate, the rubber gasket, the inner elastic plate, the outer elastic plate, the U-shaped pressing plate and the pressing plate and is matched with the nut to fasten the inner elastic plate, the outer elastic plate and the sealing unit together;

one side of the pressure plate is fastened on the edge plate of the floating pontoon by a sealing unit, the other side horizontally extends towards the direction of the tank wall of the storage tank and is used for limiting 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.

Preferably, three mounting holes are formed in the fixed ends of each of the inner elastic plate and the outer elastic plate on the edge plate of the floating vessel along the width direction of the plate, an inner flat washer nut is arranged in a hole in the middle of the inner elastic plate, the diameter of a hole in the middle 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 on the inner elastic plate in a hole in the middle of the outer elastic plate, outer flat washer nuts are arranged on two side punching holes in a hole in the middle of the outer elastic plate, and the outer flat washer nuts are fastened on the outer elastic plate.

Preferably, the outer diving board includes the outer diving board of single hook and the outer diving board of three hooks, the outer middle rigid coupling in bottom of the outer diving board of single hook has a wide spacing hook, the outer middle rigid coupling in bottom of the outer diving board of three hooks has a wide spacing hook, and wide spacing hook is used for catching on the interior diving board bottom, the outer diving board of three hooks in respectively weld one in wide spacing hook both sides and be used for the outer diving board of three hooks and the outer narrow spacing hook that the diving board of single hook is connected.

Preferably, the inner springboard is an inverted isosceles trapezoid structure with a wide upper part and a narrow lower part, and the single-hook outer springboard and the three-hook outer springboard are rectangular structures with the same width from top to bottom.

Preferably, the distance between two adjacent edge plate bolts is taken as X, and the widths of the single-hook outer springing plate, the three-hook outer springing plate and the inner springing plate meet the following conditions:

the width of the single-hook outer springboard is 3X + the width of the narrow limit hook;

the width of the three-hook outer springboard is 3X + the width of the narrow limit hook;

the width of the bottom of the inner spring plate is more than or equal to the width of the width limiting hook;

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

Preferably, a sealing interlayer is clamped between the inner elastic plate and the outer elastic plate.

The invention also provides a method for installing the double-layer elastic plate structure of the full-compensation elastic sealing of the floating roof storage tank, which comprises the following specific steps:

(1) fixing the edge support component on an edge plate of the floating pontoon, and mounting an edge plate bolt on a punched hole of the edge support component after mounting a support bracket plate and a rubber gasket on the edge support component along the circumferential direction of the tank wall;

(2) installing inner elastic plates along the circumferential direction of the tank wall, punching three holes on each inner elastic plate along the plate width direction to correspond to the three edge plate bolts, installing an inner flat washer nut at a hole in the middle of each inner elastic plate, and fastening the inner elastic plates at the edge plates of the floating pontoon;

(3) installing outer elastic plates along the circumferential direction of the tank wall, correspondingly punching three holes on each outer elastic plate along the plate width direction to be matched with three edge plate bolts sleeved on the inner elastic plate, installing a single-hook outer elastic plate every other three edge plate bolts, and installing outer flat gasket nuts at the punching holes on two sides of a hole in the middle of the single-hook outer elastic plate so that the single-hook outer elastic plate tightly presses the inner elastic plate at the edge plate of the pontoon;

(4) adjusting the position of the single-hook outer springboard to enable a wide limiting hook at the bottom of the single-hook outer springboard to hook the bottom of the attached inner springboard;

(5) after the single-hook outer elastic plate is installed, installing a three-hook outer elastic plate; installing the three-hook outer springboard on three edge board bolts between two adjacent single-hook outer springboards, and adjusting the position of the three-hook outer springboard to ensure that a wide limit hook at the bottom of the three-hook outer springboard hooks the bottom of a corresponding inner springboard at the inner side, and a narrow limit hook hooks the overlapping part of the three-hook outer springboard and the adjacent single-hook outer springboard;

(6) mounting outer flat washer nuts at punching holes on two sides of a hole in the middle of the three-hook outer elastic plate, so that the three-hook outer elastic plate compresses the inner elastic plate at the edge plate of the floating pontoon;

(7) adjusting the inner elastic plate and the outer elastic plate to ensure that the inner elastic plate and the outer elastic plate are overlapped and compressed, and the bottom of the inner elastic plate is bent towards the tank wall and is tightly attached to the tank wall; if a sealing interlayer is arranged between the inner elastic plate and the outer elastic plate, the inner elastic plate and the outer elastic plate need to clamp the middle sealing interlayer and bend towards the tank wall to be tightly attached to the tank wall;

(8) and a U-shaped pressing plate and a pressing plate are arranged along the periphery of the tank wall, and nuts are arranged, so that the edge supporting part, the supporting plate, the rubber gasket, the inner elastic plate, the outer elastic plate, the U-shaped pressing plate and the pressing plate are fastened into a whole through the edge plate bolt.

The invention has the beneficial effects that:

1. the double-layer elastic plate structure of the full-compensation elastic seal of the floating roof storage tank greatly improves the sealing effect of a single-layer elastic plate in the traditional elastic seal, and the applied elastic seal can adapt to larger annular space change of the storage tank based on the high elasticity of the double-layer elastic plate.

2. According to the double-layer elastic plate structure provided by the invention, the limit hooks are additionally arranged on the outer elastic plate to hook the joint of the inner elastic plate and the adjacent outer elastic plate, so that the installation method is simple, convenient and safe, the operability is strong, the fault tolerance is high, the problems of deformation, displacement and the like of the elastic plates are not easy to occur after the installation, and the sealing property and the operation safety of the storage tank are greatly improved.

3. The inner elastic plate and the outer elastic plate can be directly attached to each other, and a sealing interlayer can be clamped between the inner elastic plate and the outer elastic plate, so that the sealing effect of the elastic sealing device is further improved. And the double-deck diving board structure can also avoid the direct contact of sealed intermediate layer and storage tank jar wall, and at the change in-process of storage tank annular clearance, effectively reduce sealed intermediate layer because of wearing and tearing, ageing and the fracture that cause with jar wall friction, effectively improve sealed security when prolonging sealed intermediate layer live time.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2A is an enlarged view of section I of FIG. 1A;

FIG. 2B is an enlarged view of portion I of FIG. 1B;

FIG. 3 is a schematic view of the installation of the inner spring plate and the outer spring plate of the present invention;

FIG. 4 is a schematic structural view of a single hook outer springboard and a three hook outer springboard;

FIG. 5 is a schematic structural view of an inner spring plate;

FIG. 6 is an enlarged view of the portion A in FIG. 4 and the portion B in FIG. 5;

FIG. 7 is a schematic view of the inner spring plate and the outer spring plate directly attached to or sandwiched with a sealing interlayer;

fig. 8 is a schematic view showing a structure in which a seal sandwich is provided only between an inner spring plate and an outer spring plate in the present invention.

The notations in the figures have the following meanings:

10-pontoon edge plate 21-inner elastic plate 22-outer elastic plate 221-single hook outer elastic plate 222-three hook outer elastic plate 31-edge support part 32-rubber gasket 33-U-shaped pressing plate 34-first fastener 341-edge plate bolt 342-nut 343-inner flat washer nut 344-outer flat washer nut 41-supporting plate 42-pressing plate 61-wide limiting hook 62-narrow limiting hook 70-sealing interlayer

Detailed Description

The invention provides a double-layer elastic plate structure with full compensation elastic sealing for a floating roof storage tank, which comprises the following two implementation modes, wherein one implementation mode does not comprise a sealing interlayer, and the other implementation mode comprises a sealing interlayer, and can be selected and used by designers according to the specific conditions of engineering.

Two embodiments of the present invention are further described below with reference to the accompanying drawings.