Floating disc clearance compensation sealing device for storage tank

Abstract

The invention discloses a floating disc backlash compensation sealing device for a storage tank. The floating disc backlash compensation sealing device comprises a tank body; an inner floating disc; the sealing assembly extends in the circumferential direction of the inner floating disc and is arranged between the outer edge of the edge floating cabin and the tank wall, the sealing assembly comprises a sliding plate, a sealing diaphragm, a diaphragm pressing plate and a force application elastic plate which are sequentially arranged from outside to inside, and the outer side of the sliding plate abuts against the tank wall and can slide up and down relative to the tank wall; the sliding plate extends inwards from the abutting point to be provided with a stress part, the diaphragm pressing plate is configured to press the sealing diaphragm outwards so that the sealing diaphragm can abut against the inner side of the sliding plate, and the force applying part acts on the stress part and applies torque which takes the abutting point as the rotating center and rotates in the second rotating direction to the stress part. The sealing assembly of the clearance compensation sealing device is ingenious in layout, the abutting point of the sliding plate is tightly pressed on the tank wall, little liquid is stored between the outer side of the sealing diaphragm and the tank wall, a large amount of stored liquid is prevented from volatilizing and escaping, the sealing effect is good, and the strict clearance compensation requirement can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of sealed storage of storage tanks, and particularly to a floating roof gap compensation sealing device for storage tanks. Background Art

[0002] A floating roof is a device that covers the liquid surface and rises and falls with the liquid level in the tank by buoyancy. Due to the deviation of the verticality of the tank wall and the influence of the flow of the incoming and outgoing materials in the tank on the floating roof, the floating roof will shift and sway horizontally. Therefore, the annular gap between the floating roof and the tank wall is in a dynamic change state. The outer edge of the floating roof needs to be sealed and fitted to the tank wall by a gap compensation sealing device to prevent a large amount of the stored liquid in the tank from volatilizing out through the annular gap, so as to achieve the sealed storage of the stored liquid.

[0003] Currently, the gap compensation sealing device mainly adopts a primary sealing structure disclosed in the utility model patent with the authorization announcement number of "CN216917108U" and the name of "A large compensation sealing structure for tank wall and floating roof and floating roof". The primary sealing structure includes a sliding shoe plate, a supporting plate, a sealing film and a film support spring piece arranged in sequence from outside to inside. The outer edge of the sliding shoe plate is in sliding contact with the tank wall to form an elastic mechanical sealing structure. The supporting plate presses the sliding shoe plate against the tank wall, and the film support spring piece presses the sealing film to make the sealing film fit the supporting plate. Such a gap compensation sealing device has structural defects. In order to press the sliding shoe plate against the tank wall, especially for the bottom end of the supporting plate to press the bottom end of the sliding shoe plate against the tank wall, the supporting plate needs to apply an outward turning torque to the sliding shoe plate. In turn, the supporting plate will also receive a reaction force from the sliding shoe plate, generating an inward turning torque on the supporting plate. As the vertical section at the lower part of the supporting plate gradually moves away from the bent section at the upper part, the self-elastic restraint effect it receives becomes smaller and smaller, making it difficult to resist the above torque, resulting in the area near the bottom end of the supporting plate being easily bent inward or arched in the middle. And the sealing film is located inside the supporting plate, further causing the lower part of the sealing film to bend and turn inward. Only the sealing film can truly achieve the function of isolating and sealing the stored liquid. When the sealing film is inserted below the liquid level of the stored liquid in this form, it will cause more stored liquid remaining between the outside of the sealing film and the tank wall to volatilize out, and qualified gap compensation cannot be achieved. Therefore, the sealing effect of such a gap compensation sealing device needs to be improved. Summary of the Invention

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

[0005] The floating roof gap compensation sealing device for a storage tank according to an embodiment of the present invention has opposite first and second rotation directions, and includes: a tank body having a tank wall; an inner floating roof disposed inside the tank body, the inner floating roof being capable of synchronously rising and falling with the liquid level in the tank body, the inner floating roof including a single plate and an edge floating chamber, the edge floating chamber being annularly distributed along the circumference of the single plate; a sealing assembly extending along the circumference of the inner floating roof and disposed between the outer edge of the edge floating chamber and the tank wall, the sealing assembly including a sliding plate, a sealing diaphragm, a pressure film plate, and a force-applying elastic plate arranged in sequence from outside to inside, the top ends of the sliding plate, the sealing diaphragm, the pressure film plate, and the force-applying elastic plate being fastened to the top end of the edge floating chamber from top to bottom, and first bending towards the tank wall along the first rotation direction and then extending downward to a position below the liquid level in the tank body, the outer side of the sliding plate being pressed against the tank wall and capable of sliding up and down relative to the tank wall, the bottom end of the sliding plate having an abutting point, the sliding plate being provided with a force-receiving portion extending inward from the abutting point, the pressure film plate being configured to press the sealing diaphragm outward so that the sealing diaphragm is pressed against the inner side of the sliding plate, the bottom end of the force-applying elastic plate being provided with a force-applying portion, the force-applying portion acting on the force-receiving portion and applying a torque to the force-receiving portion that rotates in the second rotation direction with the abutting point as the rotation center.

[0006] It has at least the following beneficial effects: The layout of the sealing assembly of this gap compensation sealing device is ingenious, including a sliding plate, a sealing diaphragm, a pressure film plate, and a force-applying elastic plate arranged in sequence from outside to inside. Compared with the prior art, the internal and external order of the sealing diaphragm, the pressure film plate, and the force-applying elastic plate is adjusted, and the force-applying elastic plate is arranged on the innermost side. The pressure film plate presses the sealing diaphragm outward so that the sealing diaphragm is directly pressed against the inner side of the sliding plate. The bottom end of the sliding plate has an abutting point, the sliding plate is provided with a force-receiving portion extending inward from the abutting point, the bottom end of the force-applying elastic plate is provided with a force-applying portion, the force-applying portion acts on the force-receiving portion and applies a torque to the force-receiving portion that rotates in the second rotation direction with the abutting point as the rotation center, so that the abutting point of the sliding plate tightly presses on the tank wall. After the force-applying elastic plate generates a torque due to the reaction force applied by the force-receiving portion, even if it bends inward or arches in the middle, it will not affect the shape of the sealing diaphragm, and the pressure film plate still maintains the state where the sealing diaphragm is directly pressed against the sliding plate, so that the liquid stored between the outside of the sealing diaphragm and the tank wall is very small, preventing a large amount of liquid from volatilizing and escaping, and the sealing effect is good, which can meet strict gap compensation requirements.

[0007] According to some embodiments of the present invention, the force-receiving part includes a first bending plate, a bending transition plate, and a second bending plate that are sequentially connected. The top end of the first bending plate is bent and connected to the sliding plate through the abutting vertex. 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 by which the first bending plate bends relative to the sliding plate in the first rotation direction is A. The angle by which the second bending plate bends relative to the first bending plate in the first rotation direction is B. The angle by which the second bending plate continuously bends relative to the sliding plate in the first rotation direction is C, and C = A + B. Both A and B are 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 angle by which the third bending plate bends relative to the force-applying elastic plate in the second rotation direction in the natural state is D. The end of the third bending plate far from the force-applying elastic plate is the force application point, and the force application point can press against the upper side of the bending transition plate, so that the angle by which the third bending plate bends relative to the force-applying elastic plate in the second rotation direction is E, and E > D.

[0009] According to some embodiments of the present invention, when the outer edge of the marginal floating chamber moves relatively far away from the tank wall, the force-receiving part moves upward relative to the force-applying part, and the force application point still presses against the upper side of the bending transition plate, and further elastically bends the third bending plate 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 marginal floating chamber moves relatively close to the tank wall, the force-receiving part moves downward relative to the force-applying part, and the force application point can shift and press against the upper side of the second bending plate, so that the angle by which the third bending plate bends relative to the force-applying elastic plate in the second rotation direction is F, and E > F > D.

[0011] According to some embodiments of the present invention, multiple groups of the sliding plates and the force-receiving parts are provided. Multiple groups of the sliding plates are sequentially spliced and enclosed along the circumferential direction of the inner floating roof. Adjacent two groups of the force-receiving parts are snap-connected and can slide relative to each other in the vertical direction and along the circumferential direction of the inner floating roof.

[0012] According to some embodiments of the present invention, one end of the force-receiving part in the circumferential direction of the inner floating roof is provided with a movable male buckle, and the other end is provided with a female stop. The movable male buckle of the force-receiving part is configured to be snapped into the female stop of the adjacent force-receiving part, and the female stop allows the movable male buckle to displace a preset distance in the vertical direction and along the circumferential direction of the inner floating roof.

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

[0014] According to some embodiments of the present invention, there are multiple force - applying elastic plates, and the multiple force - applying elastic plates are arranged along the circumferential direction of the inner floating disc, and the force - applying elastic plates correspond to the sliding plates one by one.

[0015] According to some embodiments of the present invention, there are multiple sealing diaphragms and multiple pressing film plates. The multiple sealing diaphragms are hermetically spliced in sequence along the circumferential direction of the inner floating disc, and the multiple pressing film plates are arranged along the circumferential direction of the inner floating disc.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments, where: Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a partial structural diagram of an embodiment of the present invention in one state; Figure 3 is Figure 2 a partial structural diagram of; Figure 4 is a structural diagram of the outer edge of the marginal floating tank further away from the tank wall based on the state shown in Figure 2 ; Figure 5 is Figure 4 a partial structural diagram of; Figure 6 is a structural diagram of the outer edge of the marginal floating tank further approaching the tank wall based on the state shown in Figure 2 ; Figure 7 is Figure 6 a partial structural diagram of; Figure 8 is a schematic structural diagram of the force - applying elastic plate and the force - applying part in an embodiment of the present invention; Figure 9 is a schematic diagram of the cooperation of two adjacent stress - receiving parts in an embodiment of the present invention.

[0018] Reference numerals: tank body 1, tank wall 11, internal floating roof 2, single plate 21, marginal floating pontoon 22, liquid storage level 3, sealing assembly 4, sliding plate 41, abutting vertex 411, sealing diaphragm 42, pressing film plate 43, force-applying elastic plate 44, force-receiving 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 manner

[0019] In the description of the present invention, it should be understood that for the orientation description, such as the upper, lower, inner, outer, first rotation direction, second rotation direction, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, if the first, second, and third are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, words such as setting, extending, pressing, sliding, acting, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0022] Refer to Figures 1 to 9 , the present invention discloses a floating roof gap compensation sealing device for a storage tank, having opposite first rotation direction and second rotation direction, and comprising a tank body 1, an internal floating roof 2 and a sealing assembly 4.

[0023] Among them, refer to Figure 1 , the tank body 1 has a tank wall 11, and the tank wall 11 is specifically the side wall of the tank body 1, which is generally cylindrical. The internal floating roof 2 is arranged inside the tank body 1 and is generally in a horizontal state as a whole. The internal floating roof 2 can synchronously rise and fall with the liquid storage level 3 in the tank body 1. The internal floating roof 2 includes a single plate 21 and marginal floating pontoons 22, and the marginal floating pontoons 22 are annularly distributed along the circumference of the single plate 21.

[0024] Refer to Figure 2 and Figure 3, the sealing assembly 4 extends circumferentially along the inner floating roof 2 and is arranged between the outer edge of the marginal pontoon 22 and the tank wall 11. The sealing assembly 4 includes a sliding plate 41, a sealing diaphragm 42, a film pressing plate 43, and a force-applying elastic plate 44 arranged in sequence from outside to inside. The tops of the sliding plate 41, the sealing diaphragm 42, the film pressing plate 43, and the force-applying elastic plate 44 are fastened to the top of the marginal pontoon 22 from top to bottom, and first bend towards the tank wall 11 along the first rotation direction and then extend downward to a position below the liquid storage level 3 in the tank body 1.

[0025] It can be understood that the sliding plate 41, the film pressing plate 43, and the force-applying elastic plate 44 all have a certain elastic deformation ability. The sealing diaphragm 42 can specifically adopt a polytetrafluoroethylene fiber cloth, or other film materials that can achieve a sealing effect and remain stable in a liquid storage immersion environment.

[0026] Among them, the outer side of the sliding plate 41 abuts 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 abutting point 411. The sliding plate 41 is provided with a stress-receiving part 45 extending inward from the abutting point 411. The film pressing plate 43 is configured to press the sealing diaphragm 42 outward so that the sealing diaphragm 42 abuts against the inner side of the sliding plate 41. The bottom end of the force-applying elastic plate 44 is extended with a force-applying part 46. Refer to Figure 3 , the force-applying part 46 acts on the stress-receiving part 45 and applies a torque to the stress-receiving part 45 that rotates around the abutting point 411 and along the second rotation direction.

[0027] It can be understood that the abutting point 411 is actually an abutting curve. For the convenience of combining with the attached drawings for description and stress analysis, it is named according to the shape shown in the longitudinal section of the sealing assembly 4.

[0028] The layout of the sealing assembly 4 of this gap compensation sealing device is ingenious. Compared with the prior art, the sealing assembly 4 adjusts the internal and external order of the sealing diaphragm 42, the film pressing plate 43, and the force-applying elastic plate 44, and arranges the force-applying elastic plate 44 on the innermost side. The film pressing 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 stress-receiving part 45 and applies a torque to the stress-receiving part 45 that rotates around the abutting point 411 and along the second rotation direction, so that the abutting point 411 of the sliding plate 41 tightly presses on the tank wall 11. After the force-applying elastic plate 44 generates a torque due to the reaction force applied by the stress-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 film pressing plate 43 still maintains the shape that the sealing diaphragm 42 directly abuts against the sliding plate 41, so that the liquid storage remaining between the outer side of the sealing diaphragm 42 and the tank wall 11 is very small, preventing a large amount of liquid storage from volatilizing and escaping, and the sealing effect is good, which can meet strict gap compensation requirements.

[0029] In some embodiments of the present invention, refer toFigure 3 The force-receiving part 45 includes a first bending plate 451, a bending transition plate 452, and a second bending plate 453 that are connected in sequence. The top end of the first bending plate 451 is bent and connected to the sliding plate 41 through the abutting vertex 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 by which the first bending plate 451 is bent relative to the sliding plate 41 in the first rotation direction is A. The angle by which the second bending plate 453 is bent relative to the first bending plate 451 in the first rotation direction is B. The angle by which the second bending plate 453 is continuously bent relative to the sliding plate 41 in the first rotation direction is C, and C = A + B. Both 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.

[0030] To facilitate the analysis of the feasibility of the specific position where the force-applying part 46 acts on the force-receiving part 45, first assume that the force-applying part 46 acts on the upper side of the first bending plate 451. Refer to Figure 3 Then, the first bending plate 451 will receive 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 that rotates around the abutting vertex 411 in the second rotation direction, causing the abutting vertex 411 of the sliding plate 41 to tightly press against the tank wall 11. Therefore, the force-applying part 46 acting on the upper side of the first bending plate 451 is a feasible implementation manner, but relatively speaking, the stability will be a bit worse.

[0031] Refer to Figure 3 Since B is an acute angle, the actual included 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 receive a force perpendicular to the plane of the second bending plate 453. This force will apply a torque to the second bending plate 453 that rotates around the abutting vertex 411 in the second rotation direction, causing the abutting vertex 411 of the sliding plate 41 to tightly press against the tank wall 11.

[0032] Combining the analysis of the above two situations, refer 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 that rotates around the abutting vertex 411 in the second rotation direction, causing the abutting vertex 411 of the sliding plate 41 to tightly press against the tank wall 11.

[0033] In some embodiments of the present invention, the force-applying part 46 includes a third bending plate 461 that is elastically bent and connected to the bottom end of the force-applying elastic plate 44. Refer to Figure 8, the angle by which the third bending plate 461 bends relative to the force - applying elastic plate 44 in the natural state in the second rotation direction is D. One end of the third bending plate 461 far from the force - applying elastic plate 44 is the force - applying point 462. Refer to Figure 3 , the force - applying point 462 can press against the upper side of the bending transition plate 452, making the angle by which the third bending plate 461 bends relative to the force - applying elastic plate 44 in the second rotation direction be E, 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 to say, the force - applying point 462 has a tendency to rotate around the bottom end of the force - applying elastic plate 44 in the first rotation direction, but is blocked by the bending transition plate 452. Therefore, the force - applying point 462 can stably press against the upper side of the bending transition plate 452.

[0034] It can be understood that, relatively speaking, it is not easy for the force - receiving part 45 itself and between the force - receiving part 45 and the sliding plate 41 to undergo elastic deformation, while it is easy for elastic deformation to occur between the force - applying part 46 and the force - applying elastic plate 44.

[0035] During the actual use of the storage tank, it will be found that when the outer edge of the marginal floating pontoon 22 is relatively close to or far from the tank wall 11, the dynamic change in the height difference between the bottoms of the sliding plate 41 and the force - applying elastic plate 44 will be caused by the change in the difference in the extended lengths of the sliding plate 41 and the force - applying elastic plate 44 in the bending section. Specifically, refer to Figure 2 , the tops of the sliding plate 41 and the force - applying elastic plate 44 bend along the first rotation direction towards the tank wall 11, and they bend while keeping in close contact. However, the radius of the sliding plate 41 is larger. Comparing Figure 2 and Figure 4 , when the outer edge of the marginal floating pontoon 22 is relatively far from the tank wall 11, the bending section extends longer, and the difference in the extended lengths of the sliding plate 41 and the force - applying elastic plate 44 in the bending section is larger. Since the overall extended lengths of the sliding plate 41 and the force - applying elastic plate 44 are both 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, comparing Figure 2 and Figure 6 , when the outer edge of the marginal floating pontoon 22 is relatively close to the tank wall 11, the bending section extends shorter, and the difference in the extended lengths of the sliding plate 41 and the force - applying elastic plate 44 in the bending section is smaller. Since the overall extended lengths of the sliding plate 41 and the force - applying elastic plate 44 are both 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, which may cause the problem of the pressing failure between the force - applying part and the force - receiving part in the prior art.

[0036] This gap - compensating sealing device can solve the above - mentioned technical problems and achieve the dynamic height - difference compensation between the sliding plate 41 and the force - applying elastic plate 44: Refer to Figure 2 、 Figure 3, Figure 4 and Figure 5 When the outer edge of the edge floating tank 22 is relatively far 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 be elastically bent further along the second rotation direction relative to the force-applying elastic plate 44. The force-applying point 462 applies a torque to the bending transition plate 452 that rotates about the abutting vertex 411 and rotates along the second rotation direction, making the abutting vertex 411 of the sliding plate 41 press more tightly against the tank wall 11.

[0037] Referring to Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8 When the outer edge of the edge floating tank 22 is relatively close to the tank wall 11, the force-receiving part 45 moves downward relative to the force-applying part 46. Since the angle C of the continuous bending of the second bending plate 453 relative to the sliding plate 41 along the first rotation direction is an obtuse angle, the second bending plate 453 is specifically in an upwardly inclined form. The force-applying point 462 can shift and press against the upper side of the second bending plate 453, making the angle of the third bending plate 461 bent relative to the force-applying elastic plate 44 along the second rotation direction be F, where E > F > D, and it can also make the abutting vertex 411 of the sliding plate 41 press tightly against the tank wall 11. According to the maximum distance that the force-receiving part 45 can move downward relative to the force-applying part 46, the upwardly inclined length of the second bending plate 453 can be reasonably set to effectively prevent the force-applying point 462 from detaching from the upper side of the second bending plate 453.

[0038] In some embodiments, referring to Figure 9 , multiple groups of sliding plates 41 and force-receiving parts 45 are provided. The multiple groups of sliding plates 41 are sequentially spliced and enclosed along the circumferential direction of the inner floating tray 2. Adjacent groups of force-receiving parts 45 are snap-connected and can slide relative to each other in the vertical direction and along the circumferential direction of the inner floating tray 2, which not only realizes the purpose of splicing and enclosing the multiple groups of sliding plates 41, but also provides a relatively small range of relative movement space between the multiple groups of sliding plates 41 to adapt to the morphological difference requirements of different sliding plates 41.

[0039] Referring to Figure 9 , one end of the force-receiving part 45 in the circumferential direction of the inner floating tray 2 can be provided with a movable male buckle 454, and the other end can be provided with a female stop 455. The movable male buckle 454 of the force-receiving part 45 is configured to be snapped into the female stop 455 of the adjacent force-receiving part 45, and the female stop 455 allows the movable male buckle 454 to displace a preset distance in the vertical direction and along the circumferential direction of the inner floating tray 2. Specifically, the movable male buckle 454 and the female stop 455 can both be provided on the second bending plate 453.

[0040] In some embodiments of the present invention, a plurality of force - applying elastic plates 44 are provided. The plurality of force - applying elastic plates 44 are arranged along the circumferential direction of the inner floating disc 2. The force - applying elastic plates 44 correspond to the sliding plates 41 one by one. The circumferential extension length of each force - applying elastic plate 44 along the inner floating disc 2 can be less than or equal to the circumferential extension length of each group of sliding plates 41 along the inner floating disc 2.

[0041] In some embodiments of the present invention, a plurality of sealing diaphragms 42 and pressing plates 43 are provided. The plurality of sealing diaphragms 42 are sequentially and sealingly spliced along the circumferential direction of the inner floating disc 2 to form a combined seal. The plurality of pressing plates 43 are arranged along the circumferential direction of the inner floating disc 2.

[0042] The technical features of the above - described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above - described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0043] Certainly, the present invention is not limited to the above - described embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present invention. These equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A floating plate gap compensation sealing device for a storage tank, characterized in that: Having opposite first and second rotation directions, comprising: A tank body having a tank wall; An inner floating plate is arranged inside the tank body, and the inner floating plate can be raised and lowered synchronously with the liquid level of the storage liquid in the tank body, and the inner floating plate includes a single plate and edge floating chambers, and the edge floating chambers are distributed in an annular manner along the circumference of the single plate; The sealing assembly extends along the circumference of the inner floating disk and is arranged between the outer edge of the edge floating chamber and the tank wall, the sealing assembly comprising a sliding plate, a sealing diaphragm, a film pressing plate and a force-applying elastic plate arranged in sequence from the outside to the inside, the top ends of the sliding plate, the sealing diaphragm, the film pressing plate and the force-applying elastic plate are fastened to the top end of the edge floating chamber from top to bottom, and are first bent toward the tank wall along a first rotation direction and then extended downward to a position below the storage liquid level in the tank body, the outer side of the sliding plate is pressed against the tank wall and can slide up and down relative to the tank wall, the bottom end of the sliding plate has a contact point, the sliding plate is provided with a force-bearing part extending inwardly from the contact point, the film pressing plate is configured to press the sealing diaphragm outward so that the sealing diaphragm is pressed against the inner side of the sliding plate, the bottom end of the force-applying elastic plate is provided with a force-applying part, the force-applying part acts on the force-bearing part and applies a torque to the force-bearing part rotating with the contact point as the rotation center and along the second rotation direction.

2. The floating plate gap compensation sealing device for a storage tank according to claim 1, characterized in that: The force-bearing portion includes a first bent plate, a bent transition plate and a second bent plate connected in sequence, the top end of the first bent plate is bent and connected to the sliding plate through the abutment point, the bottom end of the second bent plate is bent and connected to the bottom end of the first bent plate through the bent transition plate, the angle at which the first bent plate is bent relative to the sliding plate along the first rotation direction is A, the angle at which the second bent plate is bent relative to the first bent plate along the first rotation direction is B, the angle at which the second bent plate is continuously bent relative to the sliding plate along the first rotation direction is C, C=A+B, A and B are both acute angles, C is an obtuse angle, and the force-applying portion acts on the upper side of the bent transition plate or the second bent plate.

3. The floating plate gap compensation sealing device for a storage tank according to claim 2, characterized in that: The force-applying portion includes a third bent plate elastically bent and connected to the bottom end of the force-applying elastic plate. The third bent plate is bent at an angle D relative to the force-applying elastic plate along the second rotation direction in a natural state. An end of the third bent plate away from the force-applying elastic plate is a force-applying point. The force-applying point can be pressed against the upper side of the bending transition plate, so that the third bent plate is bent at an angle E relative to the force-applying elastic plate along the second rotation direction, and E>D.

4. The floating plate gap compensation sealing device for a storage tank according to claim 3, characterized in that: When the outer edge of the edge buoyancy chamber is relatively far away from the tank wall, the force-bearing part moves upward relative to the force-applying part, and the force-applying point still presses against the upper side of the bent transition plate, causing the third bent plate to further bend elastically along the second rotation direction relative to the force-applying elastic plate.

5. The floating plate gap compensating sealing device for a storage tank according to claim 3, characterized in that: When the outer edge of the edge buoyancy chamber is relatively close to the tank wall, the force-bearing part moves downward relative to the force-applying part, and the force-applying point can be offset and pressed against the upper side of the second bending plate, so that the third bending plate is bent at an angle F relative to the force-applying elastic plate along the second rotation direction, and E>F>D.

6. The floating plate gap compensation sealing device for a storage tank according to claim 2, characterized in that: The sliding plates and the force-bearing parts are provided in multiple groups, and the multiple groups of sliding plates are sequentially spliced ​​and enclosed along the circumference of the inner floating plate. Two adjacent groups of force-bearing parts are buckled and connected and can slide relatively along the up and down directions and the circumference of the inner floating plate.

7. The floating plate gap compensating sealing device for a storage tank according to claim 6, characterized in that: The force-bearing part is provided with a movable male buckle at one end in the circumferential direction of the inner floating plate, and a female stop is opened 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, and the female stop allows the movable male buckle to be displaced a preset distance in the up and down directions and in the circumferential direction of the inner floating plate.

8. The floating plate gap compensating sealing device for a storage tank according to claim 7, characterized in that: The movable male buckle and the female stopper are both arranged on the second bending plate.

9. The floating plate gap compensating sealing device for a storage tank according to claim 8, characterized in that: The force-applying elastic plates are provided in plurality, and the plurality of force-applying elastic plates are arranged along the circumferential direction of the inner floating plate, and the force-applying elastic plates correspond to the sliding plates one by one.

10. The floating plate gap compensating sealing device for a storage tank according to claim 1, characterized in that: The sealing diaphragms and the film pressing plates are both provided in multiple pieces, the multiple sealing diaphragms are sealed and spliced ​​in sequence along the circumference of the inner floating disk, and the multiple film pressing plates are arranged along the circumference of the inner floating disk.

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