A method for installing a telescopic bag cover inside a storage tank

Abstract

The present invention discloses a method for installing a telescopic bag cover on the top of a storage tank, which belongs to the technical field of storage tanks, and includes the following specific steps: S1, two hoisting holes are provided on the top of the storage tank, and two steel wires are respectively inserted into the storage tank through the two hoisting holes; S2, a Havers mouth module is installed on the two steel wires, and a waveguide is located in the area enclosed by the Havers mouth module; S3, the telescopic bag cover is fixed to the Havers mouth module through a clamp; S4, a waveguide sealing pad is installed between the Havers mouth module and the waveguide; S5, the Havers mouth module and the telescopic bag cover are pulled to the top of the storage tank through two steel wires; S6, the position of the Havers mouth module is fixed on the top of the storage tank, and the connection between the steel wires and the Havers mouth module is released, and then the installation of the telescopic bag cover is completed. The present application has the effect of reducing the construction period when the telescopic bag cover is installed and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the field of storage tanks, and in particular to a method for installing a telescopic bag sleeve on the inner top of a storage tank. Background Art

[0002] Storage tanks play multiple roles in petroleum, petrochemical and chemical storage equipment, such as storage, adjusting supply and demand balance, ensuring production safety, improving production efficiency and special applications. These roles together constitute the important position of storage tanks in related industries.

[0003] The telescopic bag is an important part of the tank structure. The liquid stored in the tank (such as oil, petrochemical products, etc.) is easy to volatilize and produce oil and gas. If these oil and gas are directly discharged into the atmosphere, it will not only waste resources but also pollute the environment. Therefore, in actual use, the telescopic bag is installed and wrapped around the outside of the waveguide, effectively isolating the oil and gas dissipation channel between the space inside the tank and the gap in the waveguide, thereby significantly reducing the volatilization of oil and gas.

[0004] During the installation of the telescopic bag cover, the lower end of the telescopic bag cover is usually fixed to the floating plate, and then the upper end of the telescopic bag cover is moved to a position close to the top of the waveguide, and is clamped and fixed to the waveguide by a clamp or fixed to the storage tank by bolts to achieve the installation of the telescopic bag cover. Due to the high height of the storage tank, it is usually necessary to build scaffolding step by step in the tank during the installation of the upper end of the telescopic bag cover, and the staff completes the installation of the telescopic bag cover by climbing operations.

[0005] With regard to the above-mentioned prior art, the method of installing the telescopic bag cover by building scaffolds step by step has a long construction period and low work efficiency. Summary of the invention

[0006] In order to reduce the construction period when installing a telescopic bag cover and improve work efficiency, the present application provides a method for installing a telescopic bag cover on the inner top of a storage tank.

[0007] The present application provides a method for installing a telescopic bag cover inside a storage tank using the following technical solution:

[0008] A method for installing a telescopic bag cover on the top of a storage tank comprises the following specific steps: S1, two hoisting holes are provided through the top of the storage tank, and two steel wires are respectively inserted into the storage tank through the two hoisting holes; S2, a Havers mouth module is installed on the two steel wires, and a waveguide is located within the enclosure area of ​​the Havers mouth module; S3, the telescopic bag cover is fixed to the Havers mouth module through a clamp; S4, a waveguide sealing pad is installed between the Havers mouth module and the waveguide; S5, the Havers mouth module and the telescopic bag cover are pulled to the top of the storage tank through the two steel wires; S6, the position of the Havers mouth module is fixed on the top of the storage tank, and the installation of the telescopic bag cover is completed after the connection between the steel wires and the Havers mouth module is released.

[0009] By adopting the above technical scheme, during the installation of the telescopic bag cover, the Haval mouth module is lifted by two steel wire ropes and then the Haval mouth module is fixed to the top of the tank. There is no need to build scaffolding step by step to install the telescopic bag cover, which is beneficial to reducing the construction period when installing the telescopic bag cover and improving work efficiency. In addition, since there is no need for high-altitude work, the construction safety is greatly improved. When the telescopic bag cover is subsequently disassembled, assembled and replaced, the Haval mouth module can be lifted by steel wire ropes, and subsequent maintenance operations are simple.

[0010] Optionally, a first contoured seal is fixedly mounted on the top of the waveguide seal. When the two steel wires pull the telescopic bag cover to the top of the storage tank, the top of the first contoured seal is in close contact with the top of the storage tank.

[0011] By adopting the above technical solution, the provision of the first contoured sealing gasket is conducive to further ensuring the sealing stability between the Haversian mouth module and the waveguide after the telescopic bag sleeve is installed, which is conducive to ensuring the use effect of the telescopic bag sleeve after installation.

[0012] Optionally, two fixing screws are fixedly connected to the top of the Haversian module, and the two fixing screws are plugged into the lifting holes. The ends of the two steel wire ropes are fixedly installed with fixing sleeves, and the two fixing sleeves are respectively threadedly engaged with the two fixing screws.

[0013] By adopting the above technical solution, the connection between the wire rope and the Havermouth module can be achieved by screwing the fixed sleeve onto the fixed screw. This is convenient, fast and stable, and it is easy to achieve stable traction of the Havermouth module through the wire rope.

[0014] Optionally, after the fixing screw is passed through the storage tank, the thread is matched with a fixing nut, a gasket and a second contoured sealing gasket are arranged between the fixing nut and the storage tank, and the second contoured sealing gasket is located on a side of the gasket close to the storage tank.

[0015] By adopting the above technical solution, the fixation between the Havermouth module and the tank can be achieved by screwing the fixing nut so that the second contoured sealing gasket is pressed against the top of the tank. This is convenient and quick. The provision of the second contoured sealing gasket and the gasket is beneficial to fully ensure the stability of the position of the Havermouth module when it is fixed to the tank.

[0016] Optionally, the Haversian port module is provided with a positioning mechanism, which includes a positioning rod and a positioning drive assembly, wherein a plurality of positioning rods are circumferentially distributed around the axis of the waveguide, and the positioning drive assembly is used to drive each positioning rod to move toward or away from the axis of the waveguide.

[0017] By adopting the above technical solution, the positioning drive assembly drives each positioning rod to move in a direction close to the axis of the waveguide so that when each positioning rod contacts the outer circumferential surface of the waveguide, each positioning rod plays a limiting role when the Haversian mouth module moves, which is beneficial to ensure the stability of the Haversian mouth module when driving the telescopic bag sleeve to move in the vertical direction to the top of the tank.

[0018] Optionally, the positioning drive assembly includes a driving member, a fixing ring and a driving ring, the fixing ring is fixedly mounted on the inner wall of the Harvard mouth module, the driving ring is coaxially rotatably mounted on the fixing ring, one end of each of the positioning rods is rotatably mounted on the driving ring, the driving ring is rotatably mounted with multiple limit frames, each of the driving rings is respectively inserted into each limit frame and slidably cooperates with each limit frame, and the driving member is used to drive the rotation around its own axis.

[0019] By adopting the above technical solution, when the driving member causes the driving member to rotate around its own axis, each positioning rod rotates toward or away from the axis of the waveguide under the limiting action of the limit frame. By rotating the driving ring, each positioning rod can be synchronously moved toward or away from the axis of the waveguide, which is convenient and fast.

[0020] Optionally, the driving member includes a driving motor, a driving screw, a driving seat and a fixed seat, the fixed seat is rotatably mounted on a fixing ring, the driving screw is rotatably mounted on the fixed seat, the driving motor is mounted on the fixed seat and is used to rotate the driving screw; the driving seat is rotatably mounted on the driving ring, the driving screw is passed through the driving seat and cooperates with the driving seat thread.

[0021] By adopting the above technical solution, when the driving motor drives the driving screw to rotate, the driving seat drives the driving ring to rotate around its own axis due to the cooperation with the thread of the driving screw, thereby finally driving each positioning rod to move toward or away from the axis of the waveguide. The self-locking effect of the thread between the driving screw and the driving seat is beneficial to fully ensure the stability of the position of the driving ring after rotation.

[0022] Optionally, the positioning drive assembly includes a fixed plate, a fixed screw and a fixed guide rod, and the fixed plate, fixed screw and fixed guide rod are each arranged in a one-to-one correspondence with the positioning rod and distributed circumferentially around the axis of the Haversian mouth module. The fixed plate is fixedly installed on the Haversian mouth module, one end of the fixed screw is rotatably installed on the positioning rod, and the other end is passed through the fixed plate and threadedly cooperates with the fixed plate, and one end of the fixed guide rod is fixedly installed on the positioning rod, and the other end is passed through the fixed plate and slidingly cooperates with the fixed plate.

[0023] By adopting the above technical solution, when force is applied to rotate the fixed screw rod, the positioning rod cooperates with the thread of the fixed screw rod and moves toward or away from the axis of the waveguide under the limiting action of the fixed guide rod, which is convenient and stable.

[0024] Optionally, the positioning rod is rotatably mounted with a rotating wheel for pressing the waveguide.

[0025] By adopting the above technical solution, the setting of the rotating wheel further reduces the friction between the positioning rod and the waveguide when the Haversian module moves in the vertical direction, making it less likely for the waveguide and the pressure rod to wear due to mutual friction, which is beneficial to ensuring the service life of the waveguide and the positioning rod.

[0026] Optionally, the Haval mouth module includes a first half ring, a second half ring, a connecting plate and connecting bolts, the first half ring is fixedly installed with a plug-in block, the second half ring is provided with a plug-in groove matching the plug-in block, the connecting bolts and the connecting plate are arranged in two rows corresponding to each other, one row of the connecting bolts is sequentially passed through the first half ring and the connecting plate and then fixed by nuts, and the other row of the connecting bolts is sequentially passed through the second half ring and the connecting plate and then fixed by nuts.

[0027] By adopting the above technical solution, it is convenient to split the Haval mouth module into the first half ring and the second half ring after releasing the fixing of the connecting bolts, thereby facilitating the inspection and maintenance of the Haval mouth module during subsequent use. The cooperation of the plug-in block and the plug-in slot plays a role in positioning the first half ring and the second half ring during installation, facilitating the rapid fixation between the first half ring and the second half ring.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. During the installation of the telescopic bag cover, the Havel mouth module is lifted by two steel wire ropes and then fixed to the top of the tank. There is no need to build scaffolding step by step to install the telescopic bag cover, which is conducive to reducing the construction period of the telescopic bag cover installation and improving work efficiency.

[0030] 2. The provision of the first contoured sealing gasket is conducive to further ensuring the sealing stability between the Haversian port module and the waveguide after the telescopic bag cover is installed, thereby ensuring the use effect of the telescopic bag cover after installation.

[0031] 3. When each positioning rod contacts the outer peripheral surface of the waveguide, it plays a role in limiting the movement of the Haversian module, which is conducive to ensuring the stability of the Haversian module when driving the telescopic bag sleeve to move in the vertical direction to the top of the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the storage tank in Example 1 of the present application.

[0033] Figure 2 It is a front view structural schematic diagram of the Haval port module in Example 1 of the present application.

[0034] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A.

[0035] Figure 4 It is a schematic diagram of the explosion structure of the first half ring and the second half ring in Example 1 of the present application.

[0036] Figure 5 It is a schematic diagram of the explosion structure of the first half ring and the second half ring in embodiment 1 of the present application from another perspective.

[0037] Figure 6 yes Figure 4 A partial enlarged schematic diagram of part B.

[0038] Figure 7 It is a schematic diagram of the internal structure of the Haval port module in Example 2 of the present application.

[0039] Figure 8 yes Figure 7 A partial enlarged schematic diagram of part C in the middle.

[0040] Description of reference numerals:

[0041] 1. Storage tank; 2. Lifting hole; 3. Wire rope; 4. Haversian module; 401. First half ring; 402. Second half ring; 403. Connecting plate; 404. Connecting bolt; 5. Plug-in block; 6. Plug-in slot; 7. Fixing screw; 8. Fixing sleeve; 9. Hoop; 10. Waveguide gasket; 11. First contour gasket; 12. Positioning rod; 13. Fixing ring; 14. Driving ring; 15. Driving motor; 16. Driving screw; 17. Driving seat; 18. Fixing seat; 19. Limiting frame; 20. Rotating wheel; 21. Second contour gasket; 22. Gasket; 23. Fixing nut; 24. Fixing plate; 241. Horizontal part; 242. Vertical part; 25. Fixing screw; 26. Fixing guide rod; 27. Fixing handle; 28. Telescopic bag; 29. ​​Waveguide. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-8 This application is described in further detail.

[0043] Example 1.

[0044] The present application embodiment discloses a method for installing a telescopic bag cover inside a storage tank. Figure 1 and Figure 2 The method for installing the telescopic bag cover on the top of the storage tank includes the following specific steps: S1, two penetrating lifting holes 2 are opened on the top of the storage tank 1, and two steel wire ropes 3 are respectively passed through the two lifting holes 2 and deeply inserted into the storage tank 1.

[0045] Reference Figure 2 and Figure 3, S2, install the Haversian mouth module 4 on the two steel wire ropes 3, and make the waveguide 29 located in the enclosed area of ​​the Haversian mouth module 4.

[0046] Reference Figure 4 and Figure 5 Specifically, the Haval port module 4 includes a first half ring 401, a second half ring 402, a connecting plate 403 and a connecting bolt 404, wherein both sides of the first half ring 401 are fixedly connected with a plug-in block 5, and both sides of the second half ring 402 are provided with a plug-in groove 6 corresponding to the plug-in block 5 and plug-in matching with the plug-in block 5, so as to play a guiding role during the installation of the first half ring 401 and the second half ring 402.

[0047] Reference Figure 4 There are two connecting plates 403, which are respectively located at the two connecting places of the first half ring 401 and the second half ring 402, and the sides of the two connecting plates 403 that are far away from each other are both in contact with the inner circumference of the first half ring 401 and the second half ring 402. There are two groups of connecting bolts 404 corresponding to the connecting plates 403, and each group is provided with two rows, one row of connecting bolts 404 is sequentially passed through the first half ring 401 and the connecting plate 403 and then fixed by nuts, and the other row of connecting bolts 404 is sequentially passed through the second half ring 402 and the connecting plate 403 and then fixed by nuts, so as to achieve a stable connection between the first half ring 401 and the second half ring 402.

[0048] Reference Figure 3 and Figure 4 A vertically arranged fixing screw 7 is fixedly installed on the top of the first half ring 401 and the second half ring 402. The two fixing screws 7 are directly opposite to the hoisting hole 2 and plugged with the hoisting hole 2. The ends of the two steel wires 3 are fixedly installed with fixing sleeves 8. The two fixing sleeves 8 are respectively threadedly matched with the two fixing screws 7, so as to quickly realize the connection between the two steel wires 3 and the two fixing screws 7, that is, the Haversian module 4. When the Haversian module 4 is connected to the two steel wires 3, the waveguide 29 is located in the area enclosed by the first half ring 401 and the second half ring 402.

[0049] Reference Figure 2 and Figure 3 , S3, fix the telescopic bag cover 28 to the Haversian mouth module 4 through the clamp 9; specifically, after one end of the top of the telescopic bag cover 28 is sleeved on the outer circumferential surface of the first half ring 401 and the second half ring 402, the telescopic bag cover 28 and the Haversian mouth module 4, i.e., the first half ring 401 and the second half ring 402, are fixed by the clamp 9. There are three clamps 9 distributed along the axial direction of the Haversian mouth module 4 to fully ensure the connection stability between the telescopic bag cover 28 and the Haversian mouth module 4.

[0050] Continue to refer to Figure 2 and Figure 3, S4, install the waveguide sealing gasket 10 between the Haversian module 4 and the waveguide 29; further, the inner wall of the waveguide sealing gasket 10 is pressed against the waveguide 29, and after the waveguide sealing gasket 10 is installed, a first contour sealing gasket 11 is fixedly installed on the top of the waveguide sealing gasket 10, and the inner diameter of the first contour sealing gasket 11 is larger than the inner diameter of the waveguide sealing gasket 10.

[0051] Reference Figure 1 and Figure 3 , S5, pull the Haversian module 4 and the telescopic bag cover 28 to the top of the storage tank 1 through the two steel wires 3. Specifically, when the two steel wires 3 pull the telescopic bag cover 28 to the top of the storage tank 1, the top of the first contoured sealing gasket 11 is tightly attached to the top of the storage tank 1 to ensure the use effect of the telescopic bag cover 28 after installation.

[0052] Reference Figure 4 and Figure 6 Furthermore, in order to ensure the stability of the Haversian mouth module 4 when it moves in the vertical direction, a positioning mechanism is arranged in the Haversian mouth module 4, and the positioning mechanism includes a positioning rod 12 and a positioning drive assembly. There are multiple positioning rods 12 distributed circumferentially around the axis of the waveguide 29. In the embodiment of the present application, the number of positioning rods 12 is selected as three, and the positioning drive assembly is used to drive each positioning rod 12 to move toward or away from the axis of the waveguide 29.

[0053] Reference Figure 6 In the embodiment of the present application, the positioning drive assembly includes a drive member, a fixed ring 13 and a drive ring 14, and the drive member includes a drive motor 15, a drive screw 16, a drive seat 17 and a fixed seat 18, wherein the fixed ring 13 is fixedly installed on the inner wall of the Haversian module 4, i.e., the first half ring 401 and the second half ring 402, the drive ring 14 is coaxially rotatably installed on the fixed ring 13, the fixed seat 18 is rotatably installed on the fixed ring 13, the drive screw 16 is rotatably installed on the fixed seat 18, the drive motor 15 is fixedly installed on the fixed seat 18, and the drive screw 16 is fixedly installed on the output end of the drive motor 15, so that the drive motor 15 drives the drive screw 16 to rotate around its own axis.

[0054] Reference Figure 4 and Figure 6The driving seat 17 is rotatably mounted on the driving ring 14 , and the driving screw rod 16 is passed through the driving seat 17 and threadedly matched with the driving seat 17 . The driving ring 14 is rotatably mounted with three limit frames 19 which are arranged one by one corresponding to the positioning rods 12. One end of each positioning rod 12 is rotatably mounted on the driving ring 14, and the other end of each driving ring 14 is respectively penetrated through each limit frame 19 and slidably cooperates with each limit frame 19. One end of each positioning rod 12 penetrated through each limit frame 19 is rotatably mounted with a rotating wheel 20. When the driving motor 15 drives the driving screw 16 to rotate, the driving seat 17 drives the driving ring 14 to rotate around its own axis due to the threaded cooperation with the driving screw 16, thereby finally driving each positioning rod 12 to move toward or away from the axial direction of the waveguide 29. When the rotating wheel 20 at the end of each positioning rod 12 contacts the waveguide 29, it plays a role in limiting the position of the Haversian module 4, thereby facilitating the stability of the Haversian module 4 when moving in the vertical direction. The provision of each rotating wheel 20 is conducive to reducing the friction between the positioning rod 12 and the waveguide 29, thereby ensuring the service life of the waveguide and the positioning rod 12.

[0055] S6, fix the position of the Haversian mouth module 4 on the top of the storage tank 1, release the connection between the wire rope 3 and the Haversian mouth module 4, and then complete the installation of the telescopic bag cover 28.

[0056] Reference Figure 2 and Figure 3 Specifically, when fixing the Haversian module 4, after one of the fixing sleeves 8 is screwed off from one of the fixing screws 7, the second contour seal 21 and the gasket 22 are sequentially sleeved on the fixing screw 7, and then a fixing nut 23 is sleeved on the fixing screw 7. The fixing nut 23 is screwed so that the fixing nut 23 is pressed against the gasket 22, and the second contour seal 21 is pressed against the top of the storage tank 1, so that the fixing screw 7 and the storage tank 1 are fixed. During the screwing of the fixing nut 23, the fixing sleeve 8 can be screwed back to the fixing screw 7 to ensure the stability of the position of the fixing screw 7. When the other fixing screw 7 is fixed to the storage tank 1 in the same way, the fixation between the Haversian module 4 and the storage tank 1 is achieved, and then after the two fixing sleeves 8 are removed, that is, the connection between the wire rope 3 and the Haversian module 4 is released, the installation of the telescopic bag cover 28 is finally completed.

[0057] The implementation principle of a method for installing a telescopic bag cover on the top of a storage tank in an embodiment of the present application is as follows: when it is necessary to install the telescopic bag cover 28, after the telescopic bag cover 28 is fixed to the havermouth module 4, the havermouth module 4 is hoisted by two steel wires 3 and the havermouth module 4 is fixed to the top of the storage tank 1 to achieve the installation of the telescopic bag cover 28. During the installation of the telescopic bag cover 28, there is no need to build scaffolding step by step to install the telescopic bag cover 28, which is beneficial to reducing the construction period when installing the telescopic bag cover 28 and improving work efficiency. In addition, since there is no need for high-altitude operations, the construction safety is greatly improved. When the telescopic bag cover 28 is subsequently disassembled, assembled and replaced, the havermouth module 4 can also be hoisted by the steel wires 3, and the subsequent maintenance operation is simple.

[0058] Example 2.

[0059] Reference Figure 7 and Figure 8 The main difference between the embodiment of the present application and embodiment 1 is that in step S5, the specific settings of the positioning rod 12 and the positioning drive assembly in the positioning mechanism are different. In the embodiment of the present application, the positioning drive assembly includes a fixed plate 24, a fixed screw rod 25 and a fixed guide rod 26, wherein the fixed plate 24, the fixed screw rod 25 and the fixed guide rod 26 are all arranged in three corresponding to the positioning rod 12 and are evenly distributed circumferentially around the axis of the Haversian module 4.

[0060] Reference Figure 8 The fixing plate 24 includes a horizontal portion 241 and a vertical portion 242. The horizontal portion 241 is horizontally fixedly connected to the inner wall of the Haversian module 4, and the vertical portion 242 is vertically fixedly connected to one end of the horizontal portion 241 away from the inner wall of the Haversian module 4. The positioning rod 12 is located on the side of the horizontal portion 241 close to the axis of the waveguide 29. One end of the fixing screw 25 is rotatably mounted on the side of the positioning rod 12 close to the vertical portion 242, and the other end is penetrated through the vertical portion 242 of the fixing plate 24 and threadedly engaged with the vertical portion 242 of the fixing plate 24. One end of the fixing guide rod 26 is fixedly mounted on the side of the positioning rod 12 close to the vertical portion 242, and the other end is penetrated through the vertical portion 242 of the fixing plate 24 and slidably engaged with the vertical portion 242 of the fixing plate 24.

[0061] Reference Figure 7 and Figure 8The positioning rod 12 is rotated toward one side of the axis of the waveguide 29 and is equipped with a plurality of rotating wheels 20 distributed in the vertical direction. When the fixed screw 25 is rotated, the positioning rod 12 moves toward or away from the axis of the waveguide 29 due to the threaded fit with the fixed screw 25 and the limiting action of the fixed guide rod 26. When the rotating wheels 20 of each positioning rod 12 abut against the waveguide 29, it plays a limiting role in the position of the Haversian module 4, thereby facilitating the stability of the Haversian module 4 when it moves in the vertical direction. In order to facilitate the application of force to the rotating rod fixed screw 25, one end of the fixed screw 25 that passes through the vertical portion 242 is fixedly connected with a fixed handle 27.

[0062] The implementation principle of Example 2 of the present application is the same as that of Example 1, and the main difference lies in that in Example 1, the setting of the driving motor 15 facilitates the rapid and stable driving of the positioning rod 12 to move toward or away from the axis of the waveguide 29, while in the embodiment of the present application, it is convenient to stably limit the movement of the Haversian module 4 in the vertical direction through a plurality of rotating wheels 20 in the vertical direction.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for installing a telescopic bag cover inside a storage tank, characterized in that: The method comprises the following specific steps: S1, two hanging holes (2) are provided on the top of the storage tank (1), and two steel wire ropes (3) are respectively passed through the two hanging holes (2) and deeply inserted into the storage tank (1); S2, installing the Haversian port module (4) on the two steel wire ropes (3), and making the waveguide (29) located in the enclosed area of ​​the Haversian port module (4); S3, fixing the telescopic bag cover (28) to the Haversian port module (4) via a clamp (9); S4, installing a waveguide sealing gasket (10) between the Haversian port module (4) and the waveguide (29); S5, pull the Haversian module (4) and the telescopic bag cover (28) to the top of the storage tank (1) through two steel wire ropes (3); S6, fixing the position of the Haversian mouth module (4) on the top of the storage tank (1), releasing the connection between the steel wire rope (3) and the Haversian mouth module (4), and completing the installation of the telescopic bag cover (28); A first contoured seal (11) is fixedly mounted on the top of the waveguide seal (10); when the two steel wires (3) pull the telescopic bag cover (28) to the top of the storage tank (1), the top of the first contoured seal (11) is in close contact with the top of the storage tank (1); Two fixing screws (7) are fixedly connected to the top of the Haversian module (4), and the two fixing screws (7) are plugged into the lifting holes (2). The ends of the two steel wire ropes (3) are fixedly installed with fixing sleeves (8), and the two fixing sleeves (8) are respectively threadedly matched with the two fixing screws (7); The fixing screw (7) is threadedly engaged with a fixing nut (23) after being inserted into the storage tank (1); a gasket (22) and a second contoured sealing gasket (21) are arranged between the fixing nut (23) and the storage tank (1); the second contoured sealing gasket (21) is located on a side of the gasket (22) close to the storage tank (1); The Haval port module (4) comprises a first half ring (401), a second half ring (402), a connecting plate (403) and connecting bolts (404); the first half ring (401) is fixedly mounted with a plug-in block (5); the second half ring (402) is provided with a plug-in slot (6) that cooperates with the plug-in block (5); the connecting bolts (404) and the connecting plate (403) are arranged in two rows corresponding to each other; one row of the connecting bolts (404) is sequentially passed through the first half ring (401) and the connecting plate (403) and then fixed by nuts; the other row of the connecting bolts (404) is sequentially passed through the second half ring (402) and the connecting plate (403) and then fixed by nuts.

2. A method for installing a telescopic bag cover on the inner top of a storage tank according to claim 1, characterized in that: The Haversian module (4) is provided with a positioning mechanism, the positioning mechanism comprising a positioning rod (12) and a positioning drive assembly, a plurality of the positioning rods (12) are circumferentially distributed around the axis of the waveguide (29), and the positioning drive assembly is used to drive each positioning rod (12) to move in a direction close to or away from the axis of the waveguide (29).

3. A method for installing a telescopic bag cover on the inner top of a storage tank according to claim 2, characterized in that: The positioning drive assembly comprises a driving member, a fixing ring (13) and a driving ring (14); the fixing ring (13) is fixedly mounted on the inner wall of the Harvard module (4); the driving ring (14) is coaxially rotatably mounted on the fixing ring (13); one end of each positioning rod (12) is rotatably mounted on the driving ring (14); a plurality of limit frames (19) are rotatably mounted on the driving ring (14); each driving ring (14) is respectively penetrated through each limit frame (19) and slidably matched with each limit frame (19); the driving member is used to rotate the driving ring (14) around its own axis.

4. A method for installing a telescopic bag cover on the inner top of a storage tank according to claim 3, characterized in that: The driving member comprises a driving motor (15), a driving screw rod (16), a driving seat (17) and a fixing seat (18); the fixing seat (18) is rotatably mounted on the fixing ring (13); the driving screw rod (16) is rotatably mounted on the fixing seat (18); the driving motor (15) is mounted on the fixing seat (18) and is used to rotate the driving screw rod (16); the driving seat (17) is rotatably mounted on the driving ring (14); the driving screw rod (16) is inserted into the driving seat (17) and is threadably matched with the driving seat (17).

5. A method for installing a telescopic bag cover on the inner top of a storage tank according to claim 2, characterized in that: The positioning drive assembly comprises a fixed plate (24), a fixed screw rod (25) and a fixed guide rod (26). The fixed plate (24), the fixed screw rod (25) and the fixed guide rod (26) are all arranged in a one-to-one correspondence with the positioning rod (12) and are circumferentially distributed around the axis of the Haversian module (4). The fixed plate (24) is fixedly installed on the Haversian module (4). One end of the fixed screw rod (25) is rotatably installed on the positioning rod (12), and the other end is passed through the fixed plate (24) and threadedly engaged with the fixed plate (24). One end of the fixed guide rod (26) is fixedly installed on the positioning rod (12), and the other end is passed through the fixed plate (24) and slidably engaged with the fixed plate (24).

6. A method for installing a telescopic bag cover inside a storage tank according to any one of claims 2 to 5, characterized in that: The positioning rod (12) is rotatably mounted with a rotating wheel (20) for pressing the waveguide (29).

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