Reverse hanging membrane device of capped sewage pool

Abstract

The utility model discloses a reverse hanging membrane device with a capped sewage pool, which comprises a steel rib pipe, the cross section of the steel rib pipe is notch-shaped, the steel rib pipe is arranged above the sewage pool, and a reverse hanging membrane is clamped in the steel rib pipe and is used for fixing the reverse hanging membrane on the sewage pool through clamping and hoisting. The fixing assembly is arranged in the steel rib pipe and connected with the notch of the steel rib pipe in an inserted mode, and the reverse hanging film penetrates through the fixing assembly and extends out of the steel rib pipe. The sealing cover is arranged on the steel rib pipe in a sleeving mode, located at the end of the steel rib pipe and detachably connected with the steel rib pipe and the fixing assembly. The reverse hanging membrane penetrates through the steel rib pipe through the fixing assembly and the steel rib pipe in an inserted connection mode, the fixing assembly is attached to the inner wall of the steel rib pipe more firmly, the sealing cover is connected with the fixing assembly in an inserted connection mode while the sealing cover is connected with the steel rib pipe in an inserted connection mode, the reverse hanging membrane is limited in the fixing assembly, the reverse hanging membrane is installed on a sewage pool, and manual screwing of screws is replaced to disassemble and assemble the reverse hanging membrane. Time and labor are saved, working efficiency is improved, high-place operation of operators is avoided, and construction risks and potential safety hazards are reduced.

Description

Technical Field

[0001] This utility model relates to the field of inverted membrane covering technology for sewage tanks, and in particular to an inverted membrane covering device for sewage tanks. Background Technology

[0002] The odorous gases produced by sewage ponds can affect the surrounding environment. In order to meet environmental requirements, it is necessary to cover the sewage ponds with an inverted membrane.

[0003] An inverted membrane structure is a type of membrane structure that uses a steel frame as support to cover a sewage treatment plant with an inverted membrane. The specific steps for installing the inverted membrane on the steel frame structure mainly include: preparing tools and materials, expanding the inverted membrane, fixing the membrane edges, installing the steel frame pipes, installing the membrane material, adjusting and fixing, and handling details. For example, Chinese Utility Model Patent Application No. CN201520973134.1 discloses a floating membrane structure for sewage treatment, including a support frame and an inverted membrane. The floating membrane structure is characterized by a frame-shaped bottom frame, with supports extending upwards from the periphery of the bottom frame, spanning the bottom frame. The supports are constructed as single-tube structures or trusses, with the inverted membrane suspended below them. The edges of the bottom frame are equipped with upward-extending exhaust pipes. Disassembly and assembly of the inverted membrane requires manual removal of the screws on the arched parts of the membrane, which is time-consuming, labor-intensive, and inefficient. Furthermore, manual disassembly at a height increases the risk of accidents and poses significant safety hazards.

[0004] The disassembly and assembly of the inverted membrane is inefficient and poses a significant safety hazard due to the manual removal of screws. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an inverted membrane device for covering sewage tanks, which fixes the inverted membrane onto the sewage tank through steel frame pipes, fixing components and a cover.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A suspended membrane device for covering a sewage tank, comprising:

[0008] A steel frame tube, with a notched cross-section, is installed above the sewage tank. The inverted membrane is clamped inside the steel frame tube and used to fix the inverted membrane to the sewage tank through clamping and hoisting.

[0009] The fixing component is installed inside the steel frame tube and inserted into the notch of the steel frame tube. The inverted membrane passes through the fixing component and extends to the outside of the steel frame tube.

[0010] The cap is fitted onto the steel frame tube and located at the end of the steel frame tube. It is detachably connected to the steel frame tube and the fixing component, and is used to snap the fixing component onto the steel frame tube.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The inverted membrane is inserted into the steel frame tube via a fixing component. During installation and removal, the inverted membrane is tightened under external force, causing the fixing component to move towards the inner wall of the steel frame tube and gradually adhere to it. The greater the force, the tighter the fit between the fixing component and the inner wall of the steel frame tube. The cap is simultaneously inserted into the fixing component during the insertion process with the steel frame tube, further confining the inverted membrane within the fixing component. This allows the inverted membrane to be installed on the sewage tank, replacing manual screw tightening for installation and removal. This saves time and effort, improves work efficiency, and avoids operators working at heights, reducing operational risks and safety hazards.

[0013] More preferably, the fixing component includes:

[0014] The tensioning element is installed on the inner wall of the steel tube, with its sidewalls fitting against the steel tube, extending from one end of the steel tube to the other, and its end being flush with the end of the steel tube.

[0015] The snap-fit ​​connector is located at the end of the tensioning member and is fixedly connected to the tensioning member. Its outer wall is inserted into the cover and is used to limit the axial position of the inverted membrane on the tensioning member.

[0016] The tie rod is set on the inner wall of the clamping joint, located on the outside of the tensioning member. It is inserted into the notch on the steel frame tube and fixedly connected to the clamping joint. It is parallel to the tensioning member and has a gap. The reverse-hanging membrane extends through the gap to the outside of the steel frame tube.

[0017] Using the above technical solution, the inverted membrane is clamped between the tensioning member and the tie bar, and spans across both sides of the tie bar. By pulling the inverted membrane, the tensioning member is finally pressed against the inner wall of the steel tube. The inverted membrane is further fixed by the insertion of the clamping connector and the cap, which plays a key role in clamping the inverted membrane.

[0018] A further preferred embodiment is that the width of the tie rod is related to the thickness of the inverted membrane and the width of the notch on the steel frame tube as follows:

[0019] a + 2b ≤ c.

[0020] Where a is the width of the tie rod, b is the thickness of the inverted membrane, and c is the width of the notch on the steel frame tube.

[0021] By adopting the above technical solution, the inverted membrane can be passed through the steel frame tube to achieve the purpose of clamping and hoisting the inverted membrane.

[0022] More preferably, the tensioning element includes:

[0023] The tie rod is installed on the inside of the steel frame tube, opposite to the position of the tie bar, and is fixedly connected to the inner wall of the clamp connector, forming a gap with the tie bar for the reverse suspension membrane to pass through.

[0024] The side wings are located on both sides of the tie rod and are fixedly connected to it, with their side walls fitting against the inner wall of the steel tube. The ends of the tie rod and the side wings are inserted into the caps.

[0025] Using the above technical solution, the inverted membrane moves the tie rod towards the notch under the action of external force. The tie rod transmits the force to the tie bar through the clamp joint, causing the tie bar to also move towards the notch. At the same time, the tie bar presses down on the side wings, so that the side wings are firmly attached to the inner wall of the steel tube. Moreover, the tie rod and the steel tube are connected at the notch.

[0026] Further optimization involves the cross-section of the tie rod being either U-shaped or arched.

[0027] By adopting the above technical solution, the membrane can be clamped and suspended by the tie rod on both sides of the notch, and the side wings can be made to stick tightly to the inner wall of the steel tube.

[0028] Further optimization involves using polyurethane for the side wings, and steel plates for the tie rods, snap-fit ​​connectors, and braces.

[0029] By adopting the above technical solution, the external force is transmitted to the side wings through the tie rods, clamps, and tie bars, so that the side wings fit tightly with the steel frame tube and achieve the effect of fixation.

[0030] Further optimization involves welding the side wings to the tie rods, and welding the snap joints to both the tie rods and the tie bars.

[0031] By adopting the above technical solution, the snap-fit ​​connector is fixedly connected to the tensioning component and the pull bar.

[0032] Further optimization includes the following:

[0033] The cover is fitted onto the outer wall of the end of the steel tube and is inserted into the side wings, tie rods, and clamping joints.

[0034] The boss is set on the inner wall of the cover and is integrally connected to the cover. Its side wall is in contact with the inner wall of the steel tube.

[0035] The first slot is formed on the inner wall of the cover and is connected to the boss. Its inner wall is in contact with the outer wall of the steel tube and is inserted and cooperated with the side wing, tie rod and steel tube respectively.

[0036] The second card slot is located on the first card slot and corresponds to the position of the card connector. The card connector is inserted into the second card slot and cooperates with it.

[0037] Using the above technical solution, the cover, steel frame, and fixing components are simultaneously inserted to fix the inverted membrane above the sewage tank.

[0038] Further optimization involves the first slot being a notch, with a pre-defined space between the notch and the steel frame tube. The end face of the inverted membrane is located between the notch and the end face of the steel frame tube, extending out of the pre-defined space into the steel frame tube.

[0039] Using the above technical solution, the inverted membrane is fixed while extending out from between the cover and the steel frame tube.

[0040] Further optimized, the first card slot includes:

[0041] The annular groove is formed between the boss and the cover, and its inner wall is connected to the boss and the cover respectively, and is inserted into the steel frame tube, side wings and tie rods.

[0042] A groove is formed on the annular groove, communicates with the annular groove, and is inserted into the snap-fit ​​connector. The second snap-fit ​​slot is located inside the groove.

[0043] Using the above technical solution, the annular groove is simultaneously inserted into the steel frame tube, side wing, and tie rod, and the groove is inserted into the snap-fit ​​connector. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of this embodiment.

[0045] Figure 2 This is a schematic diagram of the internal structure of the steel tube in this embodiment.

[0046] Figure 3 This is a schematic diagram of the fixed component in this embodiment.

[0047] Figure 4 This is a schematic diagram of the tensioning member, snap-fit ​​connector, and pull bar in this embodiment.

[0048] Figure 5 This is a cross-sectional structural diagram of the fixing component in this embodiment.

[0049] Figure 6 This is a schematic diagram of the tensioning component in this embodiment.

[0050] Figure 7 This is a schematic diagram of the overall structure of the side wings and bracing in this embodiment.

[0051] Figure 8 This is a schematic diagram of the cap structure in this embodiment.

[0052] Figure 9 This is a schematic diagram of the structure in this embodiment, showing the cap, steel frame tube, and fixing components working together.

[0053] Reference numerals: 1-Inverted membrane; 2-Steel frame tube; 3-Cap; 31-Cap body; 32-First slot; 321-Ring groove; 322-Groove; 33-Second slot; 34-Boss; 4-Fixing component; 41-Tightening component; 411-Side wing; 412-Stretcher; 42-Connector; 43-Stretcher strip. Detailed Implementation

[0054] The following is in conjunction with the appendix Figures 1-9 This utility model will be described in further detail.

[0055] A type of inverted membrane device for covering sewage tanks, such as Figure 1 As shown, it includes:

[0056] The steel frame tube 2, with a notched cross-section, is positioned above the sewage tank. The inverted membrane 1 is clamped inside the steel frame tube 2 and is used to fix the inverted membrane 1 to the sewage tank through clamping and hoisting.

[0057] Fixing component 4 is installed inside steel tube 2 and inserted into the notch of steel tube 2. The inverted membrane 1 passes through fixing component 4 and extends to the outside of steel tube 2.

[0058] The cap 3 is fitted onto the steel tube 2 and located at the end of the steel tube 2. It is detachably connected to the steel tube 2 and the fixing component 4, respectively, and is used to snap the fixing component 4 onto the steel tube 2.

[0059] The inverted membrane 1 passes through the steel frame tube 2 via a plug-in connection with the fixing component 4. During the assembly and disassembly process, the inverted membrane 1 is tightened under external force, causing the fixing component 4 to move towards the inner wall of the steel frame tube 2 and gradually adhere to the inner wall. The greater the force, the tighter the fit between the fixing component 4 and the inner wall of the steel frame tube 2. The cap 3 is simultaneously plugged into the fixing component 4 during the insertion process with the steel frame tube 2, further confining the inverted membrane 1 within the fixing component 4, thereby installing the inverted membrane 1 on the sewage tank. This replaces manual screwing for assembly and disassembly of the inverted membrane, saving time and effort, improving work efficiency, and avoiding operators from working at heights, thus reducing operational risks and safety hazards.

[0060] Specifically, such as Figure 1 , Figure 2 as well as Figure 3 As shown, the fixing component 4 in this embodiment includes:

[0061] The tensioning member 41 is installed on the inner wall of the steel tube 2, its side wall is in contact with the steel tube 2, it extends from one end of the steel tube 2 to the other end, and its end is flush with the end of the steel tube 2.

[0062] The clamping connector 42 is located at the end of the tensioning member 41 and is fixedly connected to the tensioning member 41. Its outer wall is inserted into the cover 3 to limit the axial position of the reverse-hanging membrane 1 on the tensioning member 41. The cross-section of the clamping connector 42 is concave, and the internal width of the clamping connector 42 is equal to the thickness of the reverse-hanging membrane 1, so that the reverse-hanging membrane 1 can be clamped in the clamping connector 42.

[0063] The tie rod 43 is located on the inner wall of the clamping connector 42, outside the tensioning member 41. It is inserted into the notch on the steel frame tube 2 and fixedly connected to the clamping connector 42. It is parallel to the tensioning member 41 and has a gap between them. The inverted membrane 1 extends through the gap to the outside of the steel frame tube 2. The tie rod 43 has the same shape as the tensioning member 41 and is adapted to the inner wall of the steel frame tube 2. Both are either arc-shaped or straight-shaped to accommodate various sewage tanks.

[0064] The inverted membrane 1 is clamped between the tensioning member 41 and the pull bar 43, and spans across both sides of the pull bar 43. By pulling the inverted membrane 1, the tensioning member 41 is finally pressed against the inner wall of the steel tube 2. The inverted membrane 1 is further fixed by the insertion of the clamping connector 42 and the cover 3. This plays a key role in clamping the inverted membrane 1.

[0065] Specifically, such as Figure 3 , Figure 4 as well as Figure 5 As shown, in this embodiment, the relationship between the width of the tie rod 43, the thickness of the inverted membrane 1, and the width of the notch on the steel frame tube 2 is as follows:

[0066] a + 2b ≤ c.

[0067] Where a is the width of the tie bar 43, b is the thickness of the inverted membrane 1, and c is the width of the notch on the steel frame tube 2. As long as this relationship is satisfied, the inverted membrane 1 can be clamped between the tie bar 43 and the steel frame tube 2, so that the inverted membrane 1 can be passed through the steel frame tube 2 to achieve the purpose of clamping and hoisting the inverted membrane 1.

[0068] like Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the tensioning member 41 in this embodiment includes:

[0069] Tie rod 412 is set on the inner side of steel tube 2, opposite to the position of tie rod 43, fixedly connected to the inner wall of clamp connector 42, and forms a gap with tie rod 43 for the reverse suspended membrane 1 to pass through.

[0070] Side wings 411 are located on both sides of the tie rod 412 and are fixedly connected to the tie rod 412. Their sidewalls are fitted against the inner wall of the steel tube 2. The ends of the tie rod 412 and the side wings 411 are inserted into the cap 3. The overall shape of the tie rod 412 and the side wings 411 is arc-shaped or straight, such as... Figure 7As shown, it is used to adapt to steel tubes 2 of various shapes.

[0071] Under the action of external force, the inverted membrane 1 drives the tie rod 43 to move toward the notch. The tie rod 43 transmits the force to the tie rod 412 through the snap connector 42, causing the tie rod 412 to also move toward the notch. At the same time, the tie rod 412 presses down on the side wing 411, so that the side wing 411 is firmly attached to the inner wall of the steel tube 2. Moreover, the tie rod 43 and the steel tube 2 are connected at the notch.

[0072] like Figure 4 , Figure 5 as well as Figure 6 As shown, the cross-section of the tie rod 412 in this embodiment is either U-shaped or arched, which can not only clamp the anti-suspending membrane 1 with the tie rod 43 on both sides of the notch, but also make the side wings 411 stick tightly to the inner wall of the steel tube 2.

[0073] like Figure 4 As shown, in this embodiment, the side wing 411 is made of polyurethane, and the tie rod 43, snap connector 42, and tie bar 412 are all made of steel plate. The tie rod 43, snap connector 42, and tie bar 412 transmit external forces to the side wing 411, so that the side wing 411 is tightly attached to the steel tube 2. The polyurethane side wing 411 will be tightly adsorbed to the micro-unevenness of the inner wall of the steel tube 2 due to the van der Waals forces between molecules, thereby generating a certain adhesion force and achieving the fixing effect.

[0074] like Figure 3 , Figure 5 as well as Figure 6 As shown, in this embodiment, the side wings 411 are welded to the tie rods 412, and the snap-fit ​​connectors 42 are welded to the tie rods 412 and the tie bars 43, thus fixing the snap-fit ​​connectors 42 to the tensioning members 41 and the tie bars 43. In another specific embodiment, the welding method between the side wings 411 and the tie rods 412 can be either cold-press welding or hot-press welding. If cold-press welding is selected: the side wings 411 and the tie rods 412 are heated under pressure to melt and fuse them together to form a whole. If hot-press welding is selected: in a hot press, the side wings 411 and the tie rods 412 are placed together, heated and fused, and then pressed together to form a whole.

[0075] like Figure 1 and Figure 8 As shown, the cap 3 in this embodiment includes:

[0076] The cover 31 is fitted onto the outer wall of the end of the steel tube 2 and is inserted into the side wing 411, the tie rod 412 and the snap connector 42 respectively, so as to fix the fixing component 4 on the steel tube 2, so that the fixing component 4 and the steel tube 2 can cooperate together to achieve the effect of fixing the reverse membrane 1.

[0077] The boss 34 is set on the inner wall of the cover 31 and is integrally connected with the cover 31. Its side wall is in contact with the inner wall of the steel tube 2.

[0078] The first slot 32 is formed on the inner wall of the cover 31 and is connected to the boss 34. Its inner wall is in contact with the outer wall of the steel tube 2 and is inserted and cooperated with the side wing 411, the tie rod 412 and the steel tube 2 respectively, so as to play the role of the tensioning member 41.

[0079] The second slot 33 is formed on the first slot 32 and corresponds to the position of the connector 42. The connector 42 is inserted into the second slot 33 and cooperates to fix the connector 42.

[0080] The boss 34, together with the first slot 32 and the second slot 33, connects the tensioning member 41 and the locking connector 42, so that the cover 31, steel frame and fixing component 4 can be connected at the same time, and finally the inverted membrane 1 is fixed above the sewage tank.

[0081] like Figure 8 and Figure 9 As shown, in this embodiment, the first slot 32 is a notch, and there is a preset space between the notch and the steel tube 2. The end face of the inverted membrane 1 is located between the notch and the end face of the steel tube 2, and extends out of the preset space to the outside of the steel tube 2, so as to fix the inverted membrane 1 and make the inverted membrane 1 extend out from between the cover 3 and the steel tube 2.

[0082] like Figure 8 and Figure 9 As shown, the first card slot 32 in this embodiment includes:

[0083] The annular groove 321 is formed between the boss 34 and the cover 31. Its inner wall is connected to the boss 34 and the cover 31 respectively, and is inserted into the steel tube 2, the side wing 411 and the tie rod 412.

[0084] The groove 322 is formed on the annular groove 321, communicates with the annular groove 321, and is inserted into the snap-fit ​​connector 42. The second snap-fit ​​slot 33 is located in the groove 322.

[0085] The tensioning member 41 is connected to the steel frame tube 2 through the annular groove 321 and the groove 322, thereby limiting the position of the inverted membrane 1 along the circumference of the steel frame tube 2. Then, the annular groove 321 between the groove 322 and the clamping connector 42 is simultaneously inserted into the steel frame tube 2, the side wing 411 and the tensioning member 41, and the groove 322 is inserted into the clamping connector 42.

[0086] Please combine Figures 1-9 The process of installing the inverted membrane 1 in this embodiment is described as follows:

[0087] Based on the actual area of ​​the sewage tank, multiple steel pipes 2 are installed on the sewage tank. Fixing components 4 are pre-installed inside the steel pipes 2, aligning the tie rods 412 with the notches in the steel pipes 2. The tie rods 412 are pulled forcefully at both ends, transmitting the force to the side wings 411 through the tie rods 412, causing the side wings 411 to adhere tightly to the inner wall of the steel pipe 2 via van der Waals forces. The edge of the inverted membrane 1 is extended from the end of the tie bar 43, gradually extending to the clamping joint 42. When the inverted membrane 1 is fully extended below the steel pipe 2, it spans both sides of the tie bar 43 and is sandwiched between the tie bar 43 and the steel pipe 2. Then, the inverted membrane 1 is pulled downwards, causing the tie bar 43 to move outwards from the notch. Adjustments are made based on whether the inverted membrane 1 is fully extended between adjacent steel pipes 2 to ensure that the inverted membrane 1 is in a fully extended state. The snap-fit ​​connector 42 moves in the same direction as the pull rod 43, and the snap-fit ​​connector 42 drives the tie rod 412 to move towards the notch, causing the tie rod 412 to exert force on the side wing 411 again, making the side wing 411 further adhere to the inner wall of the steel tube 2. When the pull rod 43, the reverse membrane 1, and the side wall of the notch are completely locked, the reverse membrane 1 is also simultaneously clamped between the pull rod 43 and the tie rod 412, achieving the purpose of clamping the reverse membrane 1 in the steel tube 2. Then, after the groove 322 of the cover 3 is correspondingly inserted into the snap-fit ​​connector 42, the annular groove 321 is correspondingly inserted into the steel tube 2, the side wing 411, and the tie rod 412, and the cover 31 is fitted onto the tube wall of the steel tube 2. Finally, the edge of the reverse membrane 1 is fixed to complete the process of installing the reverse membrane 1. It should be noted that fixing the edge of the reverse membrane 1 is existing technology and can be achieved by existing conventional means, which will not be elaborated here.

[0088] In summary, the installation process of the inverted membrane 1 in this embodiment is simple, time-saving, labor-saving, and improves work efficiency. Moreover, it does not require too many staff to work at heights, reducing risks and ensuring a high safety factor.

[0089] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A device for covering a sewage tank with an inverted membrane, characterized in that, include: A steel frame tube (2) with a notch in its cross-section is set above the sewage tank. An inverted membrane (1) is clamped inside the steel frame tube (2) and is used to fix the inverted membrane (1) to the sewage tank by clamping and hoisting. The fixing component (4) is disposed inside the steel tube (2) and inserted into the notch of the steel tube (2). The inverted membrane (1) passes through the fixing component (4) and extends to the outside of the steel tube (2). The cap (3) is fitted onto the steel tube (2) and located at the end of the steel tube (2). It is detachably connected to the steel tube (2) and the fixing component (4) respectively, and is used to snap the fixing component (4) onto the steel tube (2).

2. The inverted membrane device for covering a sewage tank according to claim 1, characterized in that, The fixing component (4) includes: A tensioning member (41) is provided on the inner wall of the steel tube (2), its sidewall is in contact with the steel tube (2), it extends from one end of the steel tube (2) to the other end, and its end is flush with the end of the steel tube (2); A snap-fit ​​connector (42) is provided at the end of the tensioner (41) and is fixedly connected to the tensioner (41). Its outer wall is inserted into the cover (3) to limit the axial position of the anti-hanging membrane (1) on the tensioner (41). A pull bar (43) is provided on the inner wall of the clamping joint (42), located on the outside of the tensioning member (41), and is inserted into the notch on the steel tube (2). It is fixedly connected to the clamping joint (42), parallel to the tensioning member (41) and has a gap. The anti-hanging membrane (1) extends through the gap to the outside of the steel tube (2).

3. The inverted membrane device for covering a sewage tank according to claim 2, characterized in that, The relationship between the width of the tie rod (43), the thickness of the inverted membrane (1), and the width of the notch on the steel frame tube (2) is as follows: a + 2b ≤ c; Where a is the width of the pull bar (43), b is the thickness of the inverted membrane (1), and c is the width of the notch on the steel tube (2).

4. The inverted membrane device for covering a sewage tank according to claim 2, characterized in that, The tensioning member (41) includes: Tie rod (412) is set on the inner side of the steel tube (2), opposite to the position of the tie rod (43), fixedly connected to the inner wall of the clamping joint (42), and forming a gap with the tie rod (43) for the reverse hanging membrane (1) to pass through; Side wings (411) are provided on both sides of the tie rod (412) and are fixedly connected to the tie rod (412). Their side walls are attached to the inner wall of the steel tube (2). The ends of the tie rod (412) and the ends of the side wings (411) are inserted into the cover (3).

5. The inverted membrane device for covering a sewage tank according to claim 4, characterized in that, The cross-section of the tie rod (412) is either U-shaped or arched.

6. The inverted membrane device for covering a sewage tank according to claim 4, characterized in that, The clamp connector (42) and side wing (411) are made of polyurethane, while the tie rod (43) and tie bar (412) are made of steel plate.

7. The inverted membrane device for covering a sewage tank according to claim 4, characterized in that, The side wing (411) is welded to the tie rod (412) and the snap connector (42) respectively.

8. The inverted membrane device for covering a sewage tank according to claim 4, characterized in that, The cap (3) includes: The cover (31) is fitted onto the outer wall of the end of the steel tube (2) and is inserted into the side wing (411), the tie rod (412) and the snap connector (42) respectively; A boss (34) is provided on the inner wall of the cover (31) and integrally connected with the cover (31), with its side wall in contact with the inner wall of the steel tube (2); The first slot (32) is formed on the inner wall of the cover (31) and connected to the boss (34). Its inner wall is in contact with the outer wall of the steel tube (2) and is inserted and cooperated with the side wing (411), the tie rod (412) and the steel tube (2) respectively. The second slot (33) is formed on the first slot (32) and corresponds to the position of the card connector (42). The card connector (42) is inserted into the second slot (33) and cooperates with it.

9. The inverted membrane device for covering a sewage tank according to claim 8, characterized in that, The first slot (32) is a notch, and there is a preset space between the notch and the steel tube (2); the end face of the inverted membrane (1) is located between the notch and the end face of the steel tube (2), and extends out of the preset space to the outside of the steel tube (2).

10. The inverted membrane device for covering a sewage tank according to claim 9, characterized in that, The first card slot (32) includes: The annular groove (321) is formed between the boss (34) and the cover (31), and its inner wall is connected to the boss (34) and the cover (31) respectively, and is inserted into the steel tube (2), the side wing (411) and the tie rod (412); A groove (322) is formed on the annular groove (321), communicates with the annular groove (321), and is inserted into the snap connector (42). The second snap slot (33) is located in the groove (322).

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