membrane tank

Abstract

The present application relates to a kind of film tanks, belong to the technical field of storage container.It includes cylinder and dome, and the dome is equipped with ceiling under, and the ceiling includes top main body and cantilever assembly, and the top main body includes inner frame and first hanger rod.The first hanger rod is fixed in the dome under inner frame;The outer edge of inner frame and the inside wall of main container form annular interval.The cantilever assembly includes fixed beam and cantilever beam, and fixed beam is detachably connected with inner frame, and the length direction of fixed beam is consistent with the radial direction of inner frame.Cantilever beam is detachably connected with the side of fixed beam away from inner frame, and cantilever beam can rotate relative to fixed beam;When cantilever beam and fixed beam are unlocked, cantilever beam rotates relative to fixed beam, to adjust the space available for annular interval to pass through.It solves the technical problem that the installation space of the ceiling structure of traditional film tank is limited, resulting in slow hoisting of parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of storage containers, in particular to a thin film tank. BACKGROUND

[0002] Traditional low-temperature suspended ceiling storage tanks (full tanks) have a relatively complex structure, a long construction period, and a high construction cost. In order to reduce the construction cost, thin film tanks are used to replace low-temperature suspended ceiling storage tanks for storing liquefied natural gas.

[0003] However, in the process of installing the suspended ceiling of the existing thin film tank, the installation space of the suspended ceiling structure is limited as the installation of the suspended ceiling progresses. The hoisting and transportation of the parts or other equipment pipelines for the suspended ceiling are hindered by the plane of the suspended ceiling, which limits the installation space of the suspended ceiling structure and affects the installation progress of the thin film tank. SUMMARY

[0004] The present application aims to solve the technical problem of limited installation space of the suspended ceiling structure of the traditional thin film tank, which leads to slow hoisting of parts.

[0005] To solve the above technical problems, the present application provides a thin film tank, which comprises a cylinder and a dome arranged at the top of the cylinder. The cylinder comprises an outer container and a main container arranged inside the outer container. The main container is made of metal thin film material. The thin film tank further comprises a suspended ceiling arranged below the dome. The suspended ceiling comprises a top main body comprising an inner frame and a first hoisting rod. The inner frame is arranged below the dome, and the first hoisting rod is connected between the dome and the inner frame. An annular gap is provided between the outer circumferential side wall of the inner frame and the inner side wall of the main container. A cantilever assembly comprises a fixed beam and a cantilever beam. The fixed beam is arranged below the dome and is detachably connected to the inner frame. The length direction of the fixed beam is consistent with the radial direction of the inner frame. The cantilever beam is detachably connected to the side of the fixed beam away from the inner frame, and the cantilever beam can rotate relative to the fixed beam. When the cantilever beam and the fixed beam are unlocked, the cantilever beam can rotate relative to the fixed beam to adjust the space available for passing through the annular gap.

[0006] Optionally, the cantilever assembly further comprises a second hoisting rod, one end of which is connected to the fixed beam, and the other end is connected to the dome. The cantilever beam is rotationally connected to the second hoisting rod, and the cantilever beam can rotate around the axis of the second hoisting rod.

[0007] Optionally, the cantilever beam comprises a cantilever beam body and a first connecting plate; the cantilever beam body is in the same plane as the inner frame, and the first connecting plate is detachably connected with the cantilever beam body; the side of the first connecting plate away from the cantilever beam body is rotationally connected with the second boom, so that the cantilever beam can rotate around the axis of the second boom.

[0008] Optionally, the cantilever beam further comprises a bearing, the outer ring of the bearing is fixed on the side of the first connecting plate away from the cantilever beam body; the second boom is arranged in the bearing, so that the cantilever beam can rotate around the axis of the second boom.

[0009] Optionally, the fixed beam comprises a fixed beam body and a second connecting plate; the second connecting plate is detachably connected between the fixed beam body and the cantilever beam, so as to connect and fix the cantilever beam with the fixed beam body; when the second connecting plate is disconnected with the cantilever beam, the cantilever beam can rotate around the second boom.

[0010] Optionally, the ceiling further comprises a connecting piece, one end of the connecting piece is detachably connected with the inner frame, and the other end is detachably connected with the fixed beam body, so as to connect the fixed beam body on the lower side of the inner frame.

[0011] Optionally, the film tank further comprises a sealing structure; there is a gap between the outer side of the ceiling and the inner side wall of the main container; the sealing structure comprises a sealing cloth; one side of the sealing cloth is connected with the cantilever beam, and the other side is connected with the inner side wall of the film tank, so as to seal the gap between the ceiling and the inner side wall of the film tank.

[0012] Optionally, the sealing structure further comprises a fixed plate, the fixed plate is arranged at the end of the cantilever beam away from the fixed beam, and the fixed plate is arranged in opposite spacing with the inner side wall of the main container; one side of the sealing cloth is bonded to the heat insulation layer between the main container and the outer container, and the other side is fixedly connected to the fixed plate.

[0013] Optionally, the sealing cloth is a glass fiber cloth, one side of the glass fiber cloth is bonded to the inner side wall of the main container through low-temperature glue, and the other side is fixed through bolts.

[0014] Optionally, the inner frame comprises a plurality of side-by-side trapezoidal chassis, the trapezoidal chassis comprises a transverse beam extending along the radius of the ceiling and a ring beam intersecting with the transverse beam; the fixed beam is connected with the transverse beam of the inner frame.

[0015] Optionally, the ceiling further comprises a corrugated board, the corrugated board is laid on the inner frame and the cantilever beam.

[0016] The beneficial effects of the present application are as follows:

[0017] The application provides a kind of film tank, including cylinder and setting in the dome of cylinder top, cylinder includes outer container and the main container of setting in the inside of outer container, main container is metal film material, dome is equipped with ceiling under it.The ceiling includes top main body and cantilever assembly, top main body includes inner frame and first suspender, one end of first suspender is connected with inner frame, the other end is connected with dome, and inner frame is fixed below dome.The outer circumferential side wall of inner frame and the inner side wall of main container form annular interval, and cantilever assembly is arranged in the annular interval, and the fixed beam of cantilever assembly is connected with inner frame.Cantilever beam and fixed beam are detachably connected, and cantilever beam can rotate relative to the fixed beam.When cantilever beam and fixed beam are unlocked, cantilever beam can rotate relative to fixed beam to adjust the space available in annular interval, to facilitate on-site operation and parts transportation, so that external parts can be smoothly transported to the space between ceiling and dome, to speed up the ceiling speed, ensure installation progress. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a half cut schematic view of a film tank;

[0019] Figure 2 It is Figure 1 The inner frame of the film tank;

[0020] Figure 3 It is Figure 2 The trapezoidal chassis of inner frame;

[0021] Figure 4 It is Figure 1 The connection structure of cantilever assembly and inner frame;

[0022] Figure 5 It is Figure 4 The structure of cantilever assembly;

[0023] Figure 6 It is Figure 4 The connection structure of connecting piece;

[0024] Figure 7 It is Figure 4 The structure of suspender;

[0025] Figure 8 It is Figure 4 The connection of sealing structure.

[0026] The reference signs are explained as follows:

[0027] 100, film tank;

[0028] 10, barrel; 11, outer container; 12, main container; 13, thermal insulation layer;

[0029] 20, dome; 21, radial beam;

[0030] 30, suspended ceiling;

[0031] 31, inner frame; 311, trapezoidal base frame; 312, annular interval;

[0032] 32, fixed beam; 321, fixed beam body; 322, second connecting plate;

[0033] 33, cantilever beam; 331, cantilever beam body; 332, first connecting plate; 333, bearing;

[0034] 34, connecting piece;

[0035] 35, sealing structure; 351, sealing cloth; 352, fixing plate; 353, low-temperature adhesive;

[0036] 36, suspender; 361, first suspender; 362, second suspender;

[0037] 37, corrugated board. DETAILED DESCRIPTION

[0038] The typical embodiments embodying the features and advantages of the present application are described in detail in the following description. It should be understood that the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, and that the descriptions and drawings are to be regarded as illustrative in nature, and not as restrictive.

[0039] In the description of the present application, it should be understood that the indications of direction or positional relationship (such as up, down, left, right, front and back, etc.) in the embodiments shown in the drawings are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the positions of these elements change, the indications of direction will also change accordingly.

[0040] In addition, the terms "first", "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0041] Please refer to Figures 1 to 8The embodiment provides a thin film tank 100, which comprises a barrel 10, a dome 20 arranged at the top of the barrel 10, and a suspended roof 30 suspended below the dome 20.

[0042] Please refer to Figure 1 and Figure 4 The barrel 10 in the embodiment comprises an outer container 11 and a main container 12 arranged inside the outer container 11. The main container 12 is arranged in the outer container 11, is made of metal film material, and is provided with an insulating layer 13 between the main container 12 and the outer container 11, so as to keep the medium stored in the main container 12 warm.

[0043] The dome 20 is arranged on the top of the barrel 10 and covers the opening of the barrel 10. A plurality of radial beams 21 are arranged on the inner side of the top of the dome 20 and used for suspending the suspended roof 30. The radial beams 21 are circumferentially distributed on the dome 20, so that the weight of the suspended roof 30 is evenly distributed on each radial beam 21, the suspended roof 30 is connected with the dome 20 as a whole, and the stability of the suspended roof 30 is ensured.

[0044] Please continue to refer to Figures 1 to 4 The suspended roof 30 in the embodiment comprises a top main body, a cantilever assembly and corrugated boards 37.

[0045] As shown in Figure 1 , Figure 2 and Figure 4 , the top main body comprises an inner frame 31 and a first suspender 361. The inner frame 31 is arranged below the dome 20. The first suspender 361 is connected with the inner frame 31 at one end and connected with the radial beam 21 on the dome 20 at the other end, so as to fix the inner frame 31 below the dome 20. Moreover, the outer circumferential side wall of the inner frame 31 forms an annular interval 312 with the inner side wall of the main container 12.

[0046] As shown in Figure 2 and Figure 3 , the inner frame 31 comprises a plurality of annular and side-by-side trapezoidal chassis 311. The trapezoidal chassis 311 comprises a transverse beam extending along the radius of the inner frame 31 and a ring beam intersecting with the transverse beam. The plurality of trapezoidal chassis 311 are connected side by side through bolts to form an annular frame body. A plurality of connecting rods are further connected through bolts on the inner side of the transverse beam and extend to the center of the inner frame 31, so as to form an inner hole support of the inner frame 31, and the upper side of the entire inner frame 31 can be paved with the corrugated boards 37.

[0047] Please refer to Figure 2 The radius of the inner frame 31 in the embodiment is much smaller than the radius of the main container 12 of the barrel 10. When the first suspender 361 connects the inner frame 31 with the radial beam 21 and fixes the inner frame 31 below the dome 20, an annular interval 312 is formed between the outer edge of the inner frame 31 and the inner side wall of the main container 12 of the barrel 10.

[0048] As shown in Figure 1 and Figure 4 , the cantilever assembly comprises the fixed beams 32, the cantilever beams 33 and the second hangers 362. The fixed beams 32 and the cantilever beams 33 are detachably connected to form a Z-shaped whole and are connected with the transverse beams on the inner frame 31. Multiple sets of the fixed beams 32 and the cantilever beams 33 are evenly distributed on the outer periphery of the inner frame 31 and are fixed with the radial beams 21 through the second hangers 362 to arrange the fixed beams 32 and the cantilever beams 33 in the annular space 312 so that the corrugated plates 37 can be laid on the annular space 312.

[0049] As shown in Figure 4 , the fixed beams 32 and the cantilever beams 33 are arranged between the annular space 312 between the inner frame 31 and the main container 12 and the cantilever beams 33 can rotate around the second hangers 362 to adjust the space available in the annular space 312 so that the parts required by the suspended ceiling 30 or other cooling pipelines can pass through the annular space 312.

[0050] Specifically, the fixed beam 32 comprises a fixed beam body 321 and a second connecting plate 322. One end of the fixed beam body 321 is detachably connected with the transverse beam of the inner frame 31 and the other end is provided with the second connecting plate 322 for connecting with the cantilever beam 33.

[0051] Please refer to Figure 4 and Figure 6 , the fixed beam 32 and the inner frame 31 are detachably connected through the connecting piece 34.

[0052] As shown in Figure 6 , the connecting piece 34 is composed of two L-shaped steel plates and a round steel connected between the L-shaped steel plates. Through holes are formed on the L-shaped steel plates. The transverse beam of the inner frame 31 and the fixed beam body 321 are T-shaped steel, the L-shaped steel plates at both ends of the connecting piece 34 are connected with the lower side of the inner frame 31 and the upper side of the fixed beam body 321 to detachably connect the fixed beam 32 to the outer edge of the inner frame 31.

[0053] The connecting of the fixed beam 32 and the inner frame 31 through the connecting piece 34 can realize the quick disassembly and installation of the fixed beam 32 and can form a height difference between the fixed beam 32 and the inner frame 31 to prevent the fixed beam 32 from hindering the rotation of the cantilever beam 33.

[0054] Please refer to Figure 4 and Figure 5 , the fixed beam body 321 extends outward along the radial direction of the inner frame 31, that is, the length direction of the fixed beam body 321 is consistent with the radial direction of the inner frame 31. And the end of the fixed beam body 321 away from the connecting piece 34 is connected with the radial beam 21 on the dome 20 through the second hanger 362 to realize the fixation of the fixed beam 32.

[0055] Please continue to see Figure 4 and Figure 5 The cantilever beam 33 of the embodiment comprises a cantilever beam body 331, a first connecting plate 332 and a bearing 333.

[0056] The cantilever beam body 331 is in the same plane as the inner frame 31, and the first connecting plate 332 is detachably connected to the cantilever beam body 331 by bolts. The first connecting plate 332 is L-shaped, one end of which is used to connect with the cantilever beam body 331, and the other end is used to connect with the fixed beam 32, so that the cantilever beam body 331 and the fixed beam body 321 with height difference can be connected with each other to achieve fixation.

[0057] As shown in Figure 5 , the side of the first connecting plate 332 away from the cantilever beam body 331 is provided with a plurality of bearings 333, and the plurality of bearings 333 are arranged along the vertical direction of the first connecting plate 332, so that the second boom 362 can be arranged in the bearings. The outer ring of the bearing 333 is welded and fixed to the first connecting plate 332. The second boom 362 passes through the inner hole of the bearing 333, so that the cantilever beam 33 can rotate around the axis of the second boom 362 to adjust the working space available for the annular interval 312.

[0058] The arrangement of the first connecting plate 332 can connect the cantilever beam body 331 and the fixed beam body 321 at different heights with each other. Moreover, the two bearings 333 arranged vertically on the first connecting plate 332 of the embodiment can prevent the cantilever beam 33 from being stuck during rotation, and can also increase the connection strength between the cantilever beam 33 and the boom.

[0059] Please continue to see Figure 4 and Figure 5 The second connecting plate 322 on the fixed beam 32 connects and fixes the first connecting plate 332 of the cantilever beam 33 and the fixed beam body 321 by bolts. The arrangement of the second connecting plate 322 makes the first connecting plate 332 not in contact with the fixed beam body 321.

[0060] It should be understood that when the cantilever beam 33 rotates around the second boom 362, the bolts on the second connecting plate 322 and the first connecting plate 332 need to be removed, so that the cantilever beam 33 and the fixed beam 32 are in an unconnected state, and will not hinder the rotation of the cantilever beam 33. At this time, the cantilever beam 33 can rotate 360° around the second boom 362 to adjust the working space available for the annular interval 312, so that some large pipes or corrugated boards 37 and other parts can pass through the space at the cantilever beam 33 to ensure the installation progress.

[0061] In some other embodiments, the cantilever beam 33 can be directly connected with the fixed beam 32 through a rotating shaft, so that the cantilever beam 33 can rotate relative to the fixed beam 32. When the cantilever beam 33 is not locked with the fixed beam 32, the cantilever beam 33 can also rotate relative to the rotating shaft between the cantilever beam 33 and the fixed beam 32, and the space adjustment of the annular space 312 can also be achieved.

[0062] Referring to Figure 7 The boom 36 in the embodiment includes a first boom 361 and a second boom 362. The first boom 361 is used to connect the radial beam 21 and the inner frame 31. The second boom 362 is used to connect the fixed beam 32 and the radial beam 21. The boom 36 is connected with an L-shaped steel plate, and the L-shaped steel plate is provided with threaded holes for connecting with the fixed beam 32 or the inner frame 31.

[0063] Referring to Figure 4 and Figure 8 The film tank 100 in the embodiment also includes a sealing structure 35 for sealing the gap between the outer edge of the suspended ceiling 30 and the inner side wall of the main container 12 of the film tank 100, so as to keep the medium in the main container 12 warm.

[0064] Referring to Figure 8 The suspended ceiling 30 in the embodiment does not directly contact with the side wall of the main container 12, that is, the free end of the cantilever beam 33 does not abut against the inner side wall of the main container 12, and a gap is formed therebetween. The sealing of the gap is achieved by the sealing structure 35, so that the technical problem that the metal film of the main container 12 cold shrinks and extrudes the suspended ceiling 30, and the suspended ceiling 30 is deformed and damaged, can be avoided.

[0065] Referring to Figure 8 The sealing structure 35 includes a sealing cloth 351 and a fixed plate 352. The fixed plate 352 is arranged at the end of the cantilever beam 33 away from the fixed beam 32. The fixed plate 352 is arranged in parallel and spaced apart from the inner side wall of the main container 12. One side of the sealing cloth 351 is bonded to the inner side wall of the main container 12, and the other side of the sealing cloth 351 is fixedly connected to the fixed plate 352.

[0066] Specifically, the fixed plate 352 is in an L shape, and includes a horizontal plate and a vertical plate. The horizontal plate of the fixed plate 352 is connected with the corrugated plate 37 on the cantilever beam 33 through bolts. The vertical plate of the fixed plate 352 is arranged in parallel and spaced apart from the inner side wall of the main container 12, so that one side of the sealing cloth 351 is connected to the vertical plate of the fixed plate 352 through bolts, and the other side of the sealing cloth 351 is bonded to the inner side wall of the main container 12 through low-temperature glue 353, so as to seal the gap between the free end of the cantilever beam 33 and the inner side wall of the main container 12, and complete the sealing of the main container 12.

[0067] It is conceived that the sealing cloth 351 in the embodiment can be directly connected and bonded on the inner side of the main container 12 and the free end of the cantilever beam 33. It can also be bonded on the upper side of the heat insulation layer 13 between the main container 12 and the outer container 11, as long as the sealing cloth 351 completely seals the gap between the suspended ceiling 30 and the main container 12. Moreover, the bonding of the sealing cloth 351 on the upper side of the heat insulation layer 13 can prevent damage to the metal film material of the main container 12 when bonded with the cryogenic adhesive 353.

[0068] The sealing cloth 351 in the embodiment is a glass fiber cloth, which has a certain flexibility and is not affected by the shrinkage of the main container 12. Moreover, the glass fiber cloth has good sealing effect, so that the medium in the main container 12 can be kept warm.

[0069] The sealing structure 35 in the embodiment is installed after the installation of the suspended ceiling 30 is completed. The construction personnel paste the sealing cloth 351 on the upper surface of the heat insulation layer 13 with the cryogenic adhesive 353, and then fix the other end of the sealing cloth 351 to the vertical plate of the fixed plate 352 with bolts, so that the sealing cloth 351 seals the gap between the suspended ceiling 30 and the inner side wall of the main container 12, and the installation of the sealing mechanism is completed.

[0070] The embodiment also provides an installation process of the suspended ceiling 30, which comprises the following steps:

[0071] S1. Connecting the hanger rods 36: The upper parts of the first hanger rod 361 and the second hanger rod 362 are welded to the radial beams 21 on the dome 20.

[0072] S2. Connecting the inner frame 31: The plurality of trapezoidal base frames 311 are connected to the L-shaped steel plates at the bottom of the first hanger rod 361 through bolts. Then, the plurality of trapezoidal base frames 311 are fixed to each other through bolts to form a ring-shaped frame body. A connection rod extending in the radial direction is arranged in the inner circular hole of the ring-shaped frame body to form an inner frame 31 as shown in the figure. Then, the corrugated board 37 is laid on the inner frame 31 to form a working platform to facilitate the work of the workers. Figure 2

[0073] S3. Pre-installing the cantilever assembly: The bearing 333 on the cantilever beam 33 is connected to the second hanger rod 362, so that the cantilever beam 33 can rotate around the axis of the second hanger rod 362. Then, the fixed beam 32 is connected and fixed to the bottom of the second hanger rod 362, so that the cantilever beam 33 and the fixed beam 32 are fixed on the second hanger rod 362. Then, the fixed beam 32 and the inner frame 31 are connected through the connecting piece 34, and the second connecting plate 322 and the first connecting plate 332 are bolted, so that the fixed beam 32 and the cantilever beam 33 are fixed to ensure that the fixed beam 32 and the cantilever beam 33 can be connected and fixed to each other.

[0074] ​S4. After the pre-installation is completed, the second connecting plate 322 is removed from the bolt on the first connecting plate 332, so that the fixed beam 32 is disconnected with the cantilever beam 33. Then, according to the actual needs of the site, the cantilever beam 33 is rotated to rotate around the second hoisting rod 362, so as to adjust the annular interval 312 for the working space, so as to facilitate the hoisting and transportation of some parts,

[0075] S5. When most of the ceiling 30 is installed, the second connecting plate 322 is fixed with the first connecting plate 332 again, so that the cantilever beam 33 is arranged along the radial direction of the inner frame 31, and the corrugated plate 37 is laid on the cantilever beam 33.

[0076] S6. Sealing structure 35 installation: first, the sealing cloth 351 is bonded to the upper surface of the heat insulation layer 13 through the low-temperature glue 353. Then, the fixed plate 352 is fixed on the corrugated plate 37 on the cantilever beam 33 through the bolt, and the sealing cloth 351 is tightly attached to the vertical plate of the fixed plate 352, and is fixed by tightening the bolt, so that the sealing cloth 351 seals the gap between the end surface of the cantilever beam 33 and the inner side wall of the main container 12.

[0077] In summary, the cantilever assembly in the embodiment has simple structure, convenient processing, stable structure after connection, and high safety. The cantilever beam 33 can rotate 360° around the shaft axis of the second hoisting rod 362, and the operator can rotate the cantilever beam 33 according to the actual situation on site, and increase the working space of the annular interval 312 where the cantilever beam 33 is located, so as to facilitate the on-site operation and part transportation, speed up the installation speed of the ceiling 30, and improve the installation progress. In the embodiment, the inner frame 31, the cantilever beam 33 and the fixed beam 32 are all made of aluminum material, which greatly reduces the weight compared with the traditional stainless steel structure, saves the construction cost, and is convenient for on-site construction and hoisting. Moreover, all the parts are connected by bolts, so the installation process is simple, convenient, fast, and greatly shortens the construction time, reduces the construction cost, and improves the market competitiveness.

[0078] Although the present application has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive terms. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be construed broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds, are therefore intended to be embraced by the appended claims.

Claims

1. A thin-film container, comprising a cylindrical body and a dome disposed at the top of the cylindrical body, the cylindrical body comprising an outer container and a main container disposed inside the outer container, the main container being made of a metal thin-film material, characterized in that, The membrane tank also includes a suspended ceiling, which is disposed below the dome, and the suspended ceiling includes: The main body includes an inner frame and a first suspension rod; the inner frame is arranged below the dome, the first suspension rod is connected between the dome and the inner frame, and an annular gap is provided between the outer peripheral sidewall of the inner frame and the inner sidewall of the main container. The cantilever assembly includes a fixed beam and a cantilever beam; the fixed beam is located below the dome and detachably connected to the inner frame, the length direction of the fixed beam being aligned with the radial direction of the inner frame; the cantilever beam is detachably connected to the side of the fixed beam away from the inner frame, and the cantilever beam is rotatable relative to the fixed beam; when the cantilever beam is unlocked from the fixed beam, the cantilever beam can rotate relative to the fixed beam to adjust the space available for passage in the annular interval; The cantilever assembly also includes a second rod, one end of which is connected to the fixed beam and the other end of which is connected to the dome; the cantilever beam is rotatably connected to the second rod, and the cantilever beam can rotate about the axis of the second rod. The cantilever beam includes a cantilever beam body and a first connecting plate; the cantilever beam body and the inner frame are located on the same plane, and the first connecting plate is detachably connected to the cantilever beam body; the side of the first connecting plate opposite to the cantilever beam body is rotatably connected to the second suspension rod, so that the cantilever beam can rotate around the axis of the second suspension rod; The cantilever beam also includes a bearing, the outer ring of which is fixed to the side of the first connecting plate away from the main body of the cantilever beam; the second hanger rod passes through the bearing, allowing the cantilever beam to rotate about the axis of the second hanger rod. The fixed beam includes a fixed beam body and a second connecting plate; the second connecting plate is detachably connected between the fixed beam body and the cantilever beam to connect and fix the cantilever beam to the fixed beam body; when the second connecting plate is disconnected from the cantilever beam, the cantilever beam can rotate around the second suspension rod.

2. The film can according to claim 1, characterized in that, The ceiling also includes a connector, one end of which is detachably connected to the inner frame and the other end of which is detachably connected to the main body of the fixed beam, so as to connect the main body of the fixed beam to the lower side of the inner frame.

3. The film can according to any one of claims 1 to 2, characterized in that, The membrane tank also includes a sealing structure; there is a gap between the outer side of the ceiling and the inner wall of the main container; the sealing structure includes a sealing cloth; one side of the sealing cloth is connected to the cantilever beam and the other side is connected to the inner wall of the membrane tank, sealing the gap between the ceiling and the inner wall of the membrane tank.

4. The film can according to claim 3, characterized in that, The sealing structure also includes a fixing plate, which is disposed at the end of the cantilever beam away from the fixing beam, and the fixing plate is spaced apart from the inner wall of the main container; one side of the sealing cloth is adhered to the main container, and the other side is fixedly connected to the fixing plate.

5. The film can according to claim 4, characterized in that, The sealing cloth is made of glass fiber cloth. One side of the glass fiber cloth is bonded to the inner wall of the main container with low-temperature adhesive, and the other side is fixed to the fixing plate with bolts.

6. The film can according to claim 1, characterized in that, The inner frame includes multiple trapezoidal base frames arranged side by side, each trapezoidal base frame including a transverse beam extending along the radius of the ceiling and a circumferential beam intersecting the transverse beam; the fixed beam is connected to the transverse beam of the inner frame.

7. The film can according to any one of claims 1 to 2, characterized in that, The ceiling also includes corrugated sheets, which are laid on the inner frame and the cantilever beam.

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