Tank Floating Roof Gap Compensation Sealing Device

Abstract

This invention discloses a floating roof gap compensation sealing device for storage tanks, comprising: a tank body; an inner floating roof; and a sealing assembly extending circumferentially along the inner floating roof and disposed between the outer edge of the edge floating chamber and the tank wall. The sealing assembly includes a sliding plate, a sealing diaphragm, a pressure plate, and a force-applying elastic plate arranged sequentially from the outside to the inside. The outer side of the sliding plate presses against the tank wall and can slide up and down relative to the tank wall. A force-receiving part is provided on the sliding plate extending inward from the abutment point. The pressure plate is configured to press the sealing diaphragm outward so that the sealing diaphragm presses against the inner side of the sliding plate. The force-applying part acts on the force-receiving part and applies a torque to the force-receiving part rotating in a second rotation direction with the abutment point as the rotation center. The sealing assembly layout of this gap compensation sealing device is ingenious. The abutment point of the sliding plate is tightly pressed against the tank wall, leaving very little liquid between the outer side of the sealing diaphragm and the tank wall, preventing a large amount of liquid from evaporating and escaping. The sealing effect is good and can meet strict gap compensation requirements.

Description

Technical Field

[0001] This invention relates to the field of sealing and storage technology for storage tanks, and particularly to a floating roof gap compensation sealing device for storage tanks. Background Technology

[0002] A floating roof is a device that rises and falls on the surface of a liquid in a tank by means of buoyancy. Because the verticality of the tank wall is not always perfect, and the floating roof is also affected by the flow of materials entering and leaving the tank, it will shift and sway in the horizontal plane. Therefore, the annular gap between the floating roof and the tank wall is in a dynamic state. The outer edge of the floating roof needs to be sealed to the tank wall by a gap compensation sealing device to prevent the liquid in the tank from evaporating and escaping in large quantities through the annular gap, so as to achieve the sealed storage of the liquid.

[0003] Currently, gap compensation sealing devices mainly adopt the primary sealing structure disclosed in the utility model patent with authorization announcement number "CN216917108U" entitled "A large compensation sealing structure for tank wall and floating roof and floating roof". The primary sealing structure includes a sliding plate, a support plate, a sealing membrane and a membrane support spring arranged sequentially from the outside to the inside. The outer edge of the sliding plate slides in contact with the tank wall to form an elastic mechanical seal structure. The support plate presses the sliding plate onto the tank wall, and the membrane support spring presses the sealing membrane to make the sealing membrane fit with the support plate. This type of gap-compensating sealing device has structural defects. In order to press the sliding plate against the tank wall, especially at the bottom of the support plate, the support plate needs to apply an outward rotational torque to the sliding plate. Conversely, the support plate will also be subject to the reaction force applied by the sliding plate, generating an inward rotational torque. As the lower vertical section of the support plate gradually moves away from the upper curved section, the elastic constraint it experiences becomes smaller, making it difficult to resist the aforementioned torque. This causes the area near the bottom of the support plate to easily bend inward or arch in the middle. Since the sealing membrane is located inside the support plate, this further causes the lower part of the sealing membrane to also bend and rotate inward. Only the sealing membrane can truly isolate and seal the stored liquid. With the sealing membrane inserted below the liquid surface in this form, a significant amount of stored liquid remaining between the outer side of the sealing membrane and the tank wall will evaporate and escape, failing to achieve adequate gap compensation. Therefore, the sealing effect of this type of gap-compensating sealing device needs improvement. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a floating roof gap compensation sealing device for storage tanks, which has a good sealing effect.

[0005] According to an embodiment of the present invention, a tank floating roof gap compensation sealing device has opposite first and second rotation directions, comprising: a tank body having a tank wall; an inner floating roof disposed inside the tank body, the inner floating roof being capable of rising and falling synchronously with the liquid level in the tank body, the inner floating roof comprising a single plate and edge floats, the edge floats being distributed circumferentially along the single plate; and a sealing assembly extending circumferentially along the inner floating roof and disposed between the outer edge of the edge floats and the tank wall, the sealing assembly comprising a sliding plate, a sealing diaphragm, a pressure plate, and a force-applying elastic plate arranged sequentially from the outside to the inside, the top ends of the sliding plate, the sealing diaphragm, the pressure plate, and the force-applying elastic plate being... The sliding plate is fastened to the top of the edge float from top to bottom, and first bends towards the tank wall in a first rotational direction before extending downward to a position below the liquid level in the tank. The outer side of the sliding plate presses against the tank wall and can slide up and down relative to the tank wall. The bottom end of the sliding plate has an abutment point. The sliding plate has a force-receiving part extending inward from the abutment point. The pressure plate is configured to press the sealing diaphragm outward so that the sealing diaphragm presses against the inner side of the sliding plate. The bottom end of the force-applying elastic plate has a force-applying part. The force-applying part acts on the force-receiving part and applies a torque to the force-receiving part that rotates in a second rotational direction with the abutment point as the rotation center.

[0006] It has at least the following beneficial effects: The sealing components of this gap-compensating sealing device are cleverly arranged, including a sliding plate, a sealing diaphragm, a pressure plate, and a force-applying elastic plate arranged sequentially from the outside to the inside. Compared with the prior art, the inner and outer order of the sealing diaphragm, pressure plate, and force-applying elastic plate has been adjusted, with the force-applying elastic plate placed on the innermost side. The pressure plate presses the sealing diaphragm outward so that the sealing diaphragm directly abuts against the inner side of the sliding plate. The bottom end of the sliding plate has an abutment point, and a force-receiving part extends inward from the abutment point. The bottom end of the force-applying elastic plate extends to form a force-applying part. The force is applied to the force-bearing part, and a torque is applied to the force-bearing part rotating around the abutment as the center of rotation and in the second rotation direction. This causes the abutment of the sliding plate to press tightly against the tank wall. After the force-applying elastic plate is subjected to the torque generated by the reaction force applied by the force-bearing part, even if it bends inward or arches in the middle, it will not affect the shape of the sealing diaphragm. The pressure plate still maintains the shape of the sealing diaphragm directly pressing against the sliding plate, so that very little liquid remains between the outer side of the sealing diaphragm and the tank wall, preventing a large amount of liquid from evaporating and escaping. The sealing effect is good and can meet the strict gap compensation requirements.

[0007] According to some embodiments of the present invention, the force-bearing part includes a first bending plate, a bending transition plate, and a second bending plate connected in sequence. The top end of the first bending plate is bent and connected to the sliding plate through the abutment. The bottom end of the second bending plate is bent and connected to the bottom end of the first bending plate through the bending transition plate. The angle of bending of the first bending plate relative to the sliding plate in a first rotation direction is A. The angle of bending of the second bending plate relative to the first bending plate in the first rotation direction is B. The angle of continuous bending of the second bending plate relative to the sliding plate in the first rotation direction is C, where C = A + B, A and B are both acute angles, and C is an obtuse angle. The force-applying part acts on the upper side of the bending transition plate or the second bending plate.

[0008] According to some embodiments of the present invention, the force-applying part includes a third bending plate that is elastically bent and connected to the bottom end of the force-applying elastic plate. The third bending plate bends at an angle D relative to the force-applying elastic plate in the second rotation direction in its natural state. The end of the third bending plate away from the force-applying elastic plate is a force-applying point. The force-applying point can press against the upper side of the bending transition plate, so that the angle E of the third bending plate relative to the force-applying elastic plate in the second rotation direction is E, where E > D.

[0009] According to some embodiments of the present invention, when the outer edge of the edge float is relatively far away from the tank wall, the force-receiving part moves upward relative to the force-applying part, the force-applying point still presses against the upper side of the bending transition plate, and the third bending plate is further elastically bent relative to the force-applying elastic plate in the second rotation direction.

[0010] According to some embodiments of the present invention, when the outer edge of the edge float is relatively close to the tank wall, the force-receiving part moves downward relative to the force-applying part, and the force-applying point can be offset and press against the upper side of the second bending plate, so that the angle of bending of the third bending plate relative to the force-applying elastic plate in the second rotation direction is F, E>F>D.

[0011] According to some embodiments of the present invention, multiple sets of sliding plates and force-bearing parts are provided. Multiple sets of sliding plates are sequentially spliced ​​together to enclose the inner floating disk along its circumference. Adjacent sets of force-bearing parts are fastened together and can slide relative to each other in the vertical direction and the circumference of the inner floating disk.

[0012] According to some embodiments of the present invention, the force-bearing part is provided with a movable male buckle at one end of the inner floating disk in the circumferential direction, and a female stop is provided at the other end. The movable male buckle of the force-bearing part is configured to engage with the female stop of the adjacent force-bearing part. The female stop allows the movable male buckle to be displaced by a preset distance in the vertical direction and in the circumferential direction of the inner floating disk.

[0013] According to some embodiments of the present invention, both the movable male buckle and the female stop are disposed on the second bending plate.

[0014] According to some embodiments of the present invention, multiple force-applying elastic plates are provided, and the multiple force-applying elastic plates are arranged circumferentially along the inner floating disk, with each force-applying elastic plate corresponding to a sliding plate.

[0015] According to some embodiments of the present invention, multiple sealing diaphragms and multiple pressure plates are provided, the multiple sealing diaphragms are sequentially sealed and spliced ​​along the circumference of the inner floating disk, and the multiple pressure plates are arranged along the circumference of the inner floating disk.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a partial structural diagram of one state of an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A partial structural diagram;

[0021] Figure 4 For the outer edge of the edge float based on Figure 2 The diagram shows the structure when the state is further away from the tank wall;

[0022] Figure 5 for Figure 4 A partial structural diagram;

[0023] Figure 6 For the outer edge of the edge float based on Figure 2 The diagram shows the structure when the state is further close to the tank wall;

[0024] Figure 7 for Figure 6 A partial structural diagram;

[0025] Figure 8 This is a schematic diagram of the force-applying elastic plate and the force-applying part in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the cooperation between two adjacent sets of force-bearing parts in an embodiment of the present invention.

[0027] Reference numerals: Tank body 1, Tank wall 11, Inner floating roof 2, Single plate 21, Edge floating chamber 22, Liquid level 3, Sealing assembly 4, Sliding plate 41, Abutment 411, Sealing diaphragm 42, Pressure plate 43, Force-applying elastic plate 44, Force-bearing part 45, First bending plate 451, Bending transition plate 452, Second bending plate 453, Movable male buckle 454, Female stop 455, Force-applying part 46, Third bending plate 461, Force-applying point 462. Detailed Implementation

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, inside, outside, first rotation direction and second rotation direction, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] In the description of this invention, the use of terms such as first, second, and third is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] In the description of this invention, unless otherwise explicitly defined, terms such as setting, extending, pressing, sliding, functioning, and connecting should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0031] Reference Figures 1 to 9 The present invention discloses a floating roof gap compensation sealing device for storage tanks, having opposite first and second rotation directions, including a tank body 1, an inner floating roof 2 and a sealing assembly 4.

[0032] Among them, reference Figure 1 The tank body 1 has a tank wall 11, which is specifically the side wall of the tank body 1 and is roughly cylindrical. The inner floating plate 2 is set inside the tank body 1 and is generally horizontal. The inner floating plate 2 can rise and fall synchronously with the liquid level 3 in the tank body 1. The inner floating plate 2 includes a single plate 21 and an edge floating chamber 22. The edge floating chamber 22 is distributed in a ring around the circumference of the single plate 21.

[0033] Reference Figure 2 and Figure 3The sealing assembly 4 extends circumferentially along the inner floating plate 2 and is disposed between the outer edge of the edge floating chamber 22 and the tank wall 11. The sealing assembly 4 includes a sliding plate 41, a sealing diaphragm 42, a pressure plate 43 and a force-applying elastic plate 44 arranged sequentially from the outside to the inside. The top ends of the sliding plate 41, the sealing diaphragm 42, the pressure plate 43 and the force-applying elastic plate 44 are fastened to the top end of the edge floating chamber 22 from top to bottom, and first bend towards the tank wall 11 in the first rotation direction and then extend downward to a position below the liquid level 3 in the tank body 1.

[0034] It is understandable that the sliding plate 41, the pressure plate 43, and the force-applying elastic plate 44 all have a certain elastic deformation capability. The sealing diaphragm 42 can be made of polytetrafluoroethylene fiber cloth or other membrane materials that can achieve a sealing function and remain stable in the liquid immersion environment.

[0035] The sliding plate 41 has its outer side pressing against the tank wall 11 and can slide up and down relative to the tank wall 11. The bottom end of the sliding plate 41 has an abutment point 411. A force-receiving part 45 extends inward from the abutment point 411. The pressure plate 43 is configured to press the sealing diaphragm 42 outward so that the sealing diaphragm 42 presses against the inner side of the sliding plate 41. A force-applying part 46 extends from the bottom end of the force-applying elastic plate 44. (Refer to...) Figure 3 The force-applying part 46 acts on the force-receiving part 45 and applies a torque to the force-receiving part 45 that rotates with the abutment 411 as the center of rotation and in the second rotation direction.

[0036] It is understandable that the abutment 411 is actually the abutment curve. For the convenience of combining the attached drawings and performing force analysis, it is named after the shape shown in the longitudinal section of the sealing component 4.

[0037] The sealing assembly 4 of this gap-compensating sealing device has a clever layout. Compared with the prior art, the sealing assembly 4 adjusts the inner and outer order of the sealing diaphragm 42, the pressure plate 43, and the force-applying elastic plate 44, placing the force-applying elastic plate 44 on the innermost side. The pressure plate 43 presses the sealing diaphragm 42 outward so that the sealing diaphragm 42 directly abuts against the inner side of the sliding plate 41. The force-applying part 46 acts on the force-receiving part 45 and applies a torque to the force-receiving part 45, rotating around the abutment apex 411 in the second rotation direction, causing the sliding plate 41 to... The abutment 411 of the moving plate 41 is pressed tightly against the tank wall 11. After the force-applying elastic plate 44 is subjected to the torque generated by the reaction force applied by the force-receiving part 45, even if it bends inward or arches in the middle, it will not affect the shape of the sealing diaphragm 42. The pressure plate 43 still maintains the shape of the sealing diaphragm 42 directly pressing against the sliding plate 41, so that very little liquid is left between the outer side of the sealing diaphragm 42 and the tank wall 11, preventing a large amount of liquid from evaporating and escaping. The sealing effect is good and can meet the strict gap compensation requirements.

[0038] In some embodiments of the present invention, reference is made to... Figure 3 The force-bearing part 45 includes a first bending plate 451, a bending transition plate 452, and a second bending plate 453 connected in sequence. The top end of the first bending plate 451 is bent and connected to the sliding plate 41 through the abutment 411. The bottom end of the second bending plate 453 is bent and connected to the bottom end of the first bending plate 451 through the bending transition plate 452. The angle of bending of the first bending plate 451 relative to the sliding plate 41 in the first rotation direction is A. The angle of bending of the second bending plate 453 relative to the first bending plate 451 in the first rotation direction is B. The angle of continuous bending of the second bending plate 453 relative to the sliding plate 41 in the first rotation direction is C. C=A+B, where A and B are acute angles and C is an obtuse angle. The force-applying part 46 acts on the upper side of the bending transition plate 452 or the second bending plate 453.

[0039] To facilitate the analysis of the feasibility of the force-applying part 46 acting on the specific location of the force-receiving part 45, we first assume that the force-applying part 46 acts on the upper side of the first bending plate 451, referring to... Figure 3 Then the first bending plate 451 will be subjected to a force perpendicular to the plane of the first bending plate 451. Since A is an acute angle, this force will apply a torque to the first bending plate 451 with the abutment 411 as the center of rotation and rotating in the second rotation direction, so that the abutment 411 of the sliding plate 41 is pressed tightly against the tank wall 11. Therefore, the force application part 46 acting on the upper side of the first bending plate 451 is a feasible implementation method, but relatively speaking, the stability will be worse.

[0040] Reference Figure 3 Since B is an acute angle, the actual angle between the second bending plate 453 and the first bending plate 451 is the supplementary angle of B, specifically an obtuse angle. When the force-applying part 46 acts on the upper side of the second bending plate 453, the second bending plate 453 will be subjected to a force perpendicular to the plane of the second bending plate 453. This force will apply a torque to the second bending plate 453 with the abutment 411 as the center of rotation and rotating in the second rotation direction, so that the abutment 411 of the sliding plate 41 is pressed tightly against the tank wall 11.

[0041] Based on the analysis of the two scenarios above, and referring to... Figure 3 When the force-applying part 46 acts on any point on the upper side of the bending transition plate 452 between the first bending plate 451 and the second bending plate 453, it will also apply a torque to the bending transition plate 452 with the abutment 411 as the rotation center and rotating in the second rotation direction, so that the abutment 411 of the sliding plate 41 is pressed tightly against the tank wall 11.

[0042] In some embodiments of the present invention, the force-applying part 46 includes a third bent plate 461 that is elastically bent and connected to the bottom end of the force-applying elastic plate 44, as shown in the figure. Figure 8The third bending plate 461 bends at an angle D relative to the force-applying elastic plate 44 in the second rotation direction under its natural state. The end of the third bending plate 461 away from the force-applying elastic plate 44 is the force-applying point 462. (Refer to...) Figure 3 The force application point 462 can press against the upper side of the bending transition plate 452, so that the third bending plate 461 bends relative to the force application elastic plate 44 at an angle of E in the second rotation direction, where E > D. That is, the third bending plate 461 undergoes elastic deformation. Since the third bending plate 461 has a tendency to recover to its natural state, that is, the force application point 462 has a tendency to rotate with the bottom end of the force application elastic plate 44 as the rotation center in the first rotation direction, but is stopped by the bending transition plate 452. Therefore, the force application point 462 can press against the upper side of the bending transition plate 452 relatively stably.

[0043] It is understandable that, in comparison, the force-bearing part 45 itself and the force-bearing part 45 and the sliding plate 41 are less prone to elastic deformation, while the force-applying part 46 and the force-applying elastic plate 44 are more prone to elastic deformation.

[0044] In actual use of the storage tank, it is found that when the outer edge of the edge float 22 is relatively close to or far from the tank wall 11, the change in the difference in the extension length of the sliding plate 41 and the force-applying elastic plate 44 in the bending section will cause a dynamic change in the height difference between their bottom ends. Specifically, referring to... Figure 2 The tops of the sliding plate 41 and the force-applying elastic plate 44 bend towards the tank wall 11 in the first rotation direction, maintaining a close contact while bending. However, the radius of the sliding plate 41 is larger. Figure 2 and Figure 4 When the outer edge of the edge float 22 is relatively far away from the tank wall 11, the curved section extends longer, and the difference in the extension length of the sliding plate 41 and the force-applying elastic plate 44 in the curved section becomes larger. Since the overall extension length of the sliding plate 41 and the force-applying elastic plate 44 is fixed, the bottom end of the sliding plate 41 moves upward relative to the bottom end of the force-applying elastic plate 44, and the force-receiving part 45 moves upward relative to the force-applying part 46; similarly, compared Figure 2 and Figure 6 When the outer edge of the edge float 22 is relatively close to the tank wall 11, the bending section is shorter, and the difference in the bending section length between the sliding plate 41 and the force-applying elastic plate 44 is smaller. However, since the overall extension length of the sliding plate 41 and the force-applying elastic plate 44 is fixed, the bottom end of the sliding plate 41 moves downward relative to the bottom end of the force-applying elastic plate 44, and the force-receiving part 45 moves downward relative to the force-applying part 46. This may cause the problem of pressure failure of the force-applying part and the force-receiving part in the prior art.

[0045] This gap-compensating sealing device can solve the above-mentioned technical problems and realize dynamic height difference compensation between the sliding plate 41 and the force-applying elastic plate 44:

[0046] See reference Figure 2, Figure 3 , Figure 4 and Figure 5 When the outer edge of the edge float 22 is relatively far away from the tank wall 11, the force-receiving part 45 moves upward relative to the force-applying part 46, the force-applying point 462 still presses against the upper side of the bending transition plate 452, and causes the third bending plate 461 to bend elastically relative to the force-applying elastic plate 44 in the second rotation direction. The force-applying point 462 increases the torque applied to the bending transition plate 452 with the abutment point 411 as the rotation center and rotating in the second rotation direction, so that the abutment point 411 of the sliding plate 41 is pressed more tightly against the tank wall 11.

[0047] Reference Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 When the outer edge of the edge float 22 is relatively close to the tank wall 11, the force-bearing part 45 moves downward relative to the force-applying part 46. Since the angle C of the second bending plate 453 continuously bending relative to the sliding plate 41 in the first rotation direction is an obtuse angle, the second bending plate 453 is specifically in an upward tilted shape. The force-applying point 462 can be offset and press against the upper side of the second bending plate 453, so that the angle of the third bending plate 461 bending relative to the force-applying elastic plate 44 in the second rotation direction is F, E>F>D. It can also make the abutment point 411 of the sliding plate 41 press tightly against the tank wall 11. According to the maximum distance that the force-bearing part 45 can move downward relative to the force-applying part 46, the upward tilting length of the second bending plate 453 can be reasonably set, which can effectively prevent the force-applying point 462 from leaving the upper side of the second bending plate 453.

[0048] In some embodiments, refer to Figure 9 Multiple sets of sliding plates 41 and force-bearing parts 45 are provided. Multiple sets of sliding plates 41 are sequentially spliced ​​together along the circumference of the inner floating plate 2. Adjacent sets of force-bearing parts 45 are fastened together and can slide relative to each other in the vertical direction and the circumference of the inner floating plate 2. This achieves the purpose of splicing and enclosing multiple sets of sliding plates 41, and also provides a small range of relative movement space between multiple sets of sliding plates 41, adapting to the different shape requirements of different sliding plates 41.

[0049] Reference Figure 9 The force-bearing part 45 can be provided with a movable male buckle 454 at one end in the circumferential direction of the inner floating plate 2, and a female stop 455 at the other end. The movable male buckle 454 of the force-bearing part 45 is configured to engage with the female stop 455 of the adjacent force-bearing part 45. The female stop 455 allows the movable male buckle 454 to be displaced by a preset distance in the vertical direction and in the circumferential direction of the inner floating plate 2. Specifically, both the movable male buckle 454 and the female stop 455 can be provided on the second bending plate 453.

[0050] In some embodiments of the present invention, multiple force-applying elastic plates 44 are provided, and the multiple force-applying elastic plates 44 are arranged along the circumference of the inner floating disk 2. The force-applying elastic plates 44 correspond one-to-one with the sliding plates 41. The circumferential extension length of each force-applying elastic plate 44 along the inner floating disk 2 can be less than or equal to the circumferential extension length of each group of sliding plates 41 along the inner floating disk 2.

[0051] In some embodiments of the present invention, multiple sealing diaphragms 42 and pressure plates 43 are provided. Multiple sealing diaphragms 42 are sequentially sealed and spliced ​​along the circumference of the inner floating disk 2 to form a combined sealing element. Multiple pressure plates 43 are arranged along the circumference of the inner floating disk 2.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A floating roof gap compensation sealing device for storage tanks, characterized in that, Having opposite first and second rotational directions, including: The tank body has tank walls; An internal floating roof is installed inside the tank. The internal floating roof can rise and fall synchronously with the liquid level in the tank. The internal floating roof includes a single plate and edge floats. The edge floats are distributed in a ring around the circumference of the single plate. A sealing assembly extends circumferentially along the inner floating roof and is disposed between the outer edge of the edge floating chamber and the tank wall. The sealing assembly includes a sliding plate, a sealing diaphragm, a pressure plate, and a force-applying elastic plate arranged sequentially from the outside to the inside. The top ends of the sliding plate, the sealing diaphragm, the pressure plate, and the force-applying elastic plate are fastened to the top end of the edge floating chamber from top to bottom, and first bend towards the tank wall in a first rotational direction before extending downward to a position below the liquid level in the tank. The outer side of the sliding plate presses against the tank wall and can slide up and down relative to the tank wall. The bottom end of the sliding plate has an abutment point. A force-bearing part is provided extending inward from the abutment point of the sliding plate. The force-bearing part includes a first bending plate, a bending transition plate, and a second bending plate connected sequentially. The top end of the first bending plate is bent and connected to the sliding plate through the abutment point. The bottom end of the second bending plate is bent and connected to the bottom end of the first bending plate through the bending transition plate. The first bending plate is bent relative to the sliding plate in a first rotational direction. The angle of bending in the direction of rotation is A, the angle of bending of the second bending plate relative to the first bending plate in the first rotation direction is B, and the angle of continuous bending of the second bending plate relative to the sliding plate in the first rotation direction is C, where C = A + B, A and B are both acute angles, and C is an obtuse angle. The pressure plate is configured to press the sealing diaphragm outward so that the sealing diaphragm abuts against the inner side of the sliding plate. The bottom end of the force-applying elastic plate extends to provide a force-applying part, which includes a third bending plate that is elastically bent and connected to the bottom end of the force-applying elastic plate. In its natural state, the angle of bending of the third bending plate relative to the force-applying elastic plate in the second rotation direction is D. The end of the third bending plate away from the force-applying elastic plate is the force-applying point, which can abut against the upper side of the bending transition plate, so that the angle of bending of the third bending plate relative to the force-applying elastic plate in the second rotation direction is E, where E > D, and a torque is applied to the force-receiving part that rotates in the second rotation direction with the abutment point as the rotation center.

2. The floating roof gap compensation sealing device for storage tanks according to claim 1, characterized in that, When the outer edge of the edge float moves away from the tank wall, the force-receiving part moves upward relative to the force-applying part, the force-applying point still presses against the upper side of the bending transition plate, and the third bending plate further bends elastically relative to the force-applying elastic plate in the second rotation direction.

3. The floating roof gap compensation sealing device for storage tanks according to claim 1, characterized in that, When the outer edge of the edge float is relatively close to the tank wall, the force-receiving part moves downward relative to the force-applying part, and the force-applying point can shift and press against the upper side of the second bending plate, so that the angle of bending of the third bending plate relative to the force-applying elastic plate in the second rotation direction is F, E>F>D.

4. The floating roof gap compensation sealing device for storage tanks according to claim 1, characterized in that, Multiple sets of sliding plates and force-bearing parts are provided. Multiple sets of sliding plates are sequentially spliced ​​together to enclose the inner floating disk along its circumference. Adjacent sets of force-bearing parts are fastened together and can slide relative to each other in the vertical direction and the circumference of the inner floating disk.

5. The floating roof gap compensation sealing device for storage tanks according to claim 4, characterized in that, The force-bearing part is provided with a movable male buckle at one end of the inner floating disk in the circumferential direction, and a female stop is provided at the other end. The movable male buckle of the force-bearing part is configured to be inserted into the female stop of the adjacent force-bearing part. The female stop allows the movable male buckle to be displaced by a preset distance in the vertical direction and in the circumferential direction of the inner floating disk.

6. The floating roof gap compensation sealing device for storage tanks according to claim 5, characterized in that, Both the movable male buckle and the female stop are located on the second bending plate.

7. The floating roof gap compensation sealing device for storage tanks according to claim 6, characterized in that, Multiple force-applying elastic plates are provided, and the multiple force-applying elastic plates are arranged along the circumference of the inner floating plate. Each force-applying elastic plate corresponds to a sliding plate.

8. The floating roof gap compensation sealing device for storage tanks according to claim 1, characterized in that, Multiple sealing diaphragms and multiple pressure plates are provided. Multiple sealing diaphragms are sequentially sealed and spliced ​​along the circumference of the inner floating disk, and multiple pressure plates are arranged along the circumference of the inner floating disk.

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