A combined inner reinforcement structure

Abstract

This invention discloses a combined internal reinforcement structure, relating to the field of composite pressure vessels for petrochemical applications. The combined internal reinforcement structure includes: multiple small-end reinforcement modules disposed on the small end of a conical shell. Each small-end reinforcement module is located within the shell along the axial direction of the small-end cylinder. Each small-end reinforcement module includes a small-end longitudinal pad, a small-end longitudinal reinforcing beam, and a small-end circumferential reinforcing rib. The small-end longitudinal pad is disposed on the small end of the conical shell. The small-end longitudinal reinforcing beam is connected to the small-end longitudinal pad via a small-end longitudinal connecting plate. At least one side of the small-end longitudinal reinforcing beam is provided with a small-end circumferential reinforcing rib. The small-end circumferential reinforcing ribs in adjacent small-end reinforcement modules are connected by bolts. A portal-shaped support is disposed on the shell, supporting the bottom of the small-end reinforcement modules. This reinforcement structure, with its small-end reinforcement at the small end of the conical shell, effectively solves the strength problem of the conical shell and reduces manufacturing costs.

Description

Technical Field

[0001] This invention belongs to the technical field of composite pressure vessels for petrochemical applications, and more specifically, relates to a combined internally reinforced structure. Background Technology

[0002] Pressure vessels using a conical shell (either a right cone or an oblique cone) connecting a small-end cylinder and a large-end cylinder are classified as composite pressure vessels based on their shape. From a strength design perspective, the connection between the conical shell and the cylinder exhibits significant abrupt changes and discontinuities due to structural variations and deformation coordination. This often results in substantial additional loads at the small and large ends of the conical shell. To resist these additional loads, reinforcement design is required at the connection point. Common practices include directly increasing the shell thickness of the small-end cylinder (within a certain distance from the connection), the conical shell, and the large-end cylinder (within a certain distance from the connection), or locally installing reinforcing rings on the shell. However, directly increasing the shell wall thickness, due to the pressure vessel's use of pressure vessel-specific steel, significantly increases material, manufacturing, and inspection costs, making this method less economical. Furthermore, locally installing reinforcing rings on the shell has significant design limitations, particularly in addressing the strength issues of conical shell transition structures with large semi-apex angles. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a combined internal reinforcement structure. This reinforcement structure has a small-end reinforcement structure at the small end of the conical shell, which can effectively solve the strength problem of the conical shell and reduce manufacturing costs.

[0004] To achieve the above objectives, the present invention provides a combined internal reinforcing structure, wherein the combined internal reinforcing structure is disposed inside a shell, the shell comprising a small-end cylinder, a small-end conical shell, a large-end conical shell, and a large-end cylinder, and the combined internal reinforcing structure comprising:

[0005] Multiple small-end reinforcing modules are disposed on the small end of the conical shell. The small-end reinforcing modules are disposed within the shell along the axial direction of the small-end cylinder. Each small-end reinforcing module includes a small-end longitudinal pad, a small-end longitudinal reinforcing beam, and a small-end circumferential reinforcing rib. The small-end longitudinal pad is disposed on the small end of the conical shell. The small-end longitudinal reinforcing beam is connected to the small-end longitudinal pad through a small-end longitudinal connecting plate. At least one side of the small-end longitudinal reinforcing beam is provided with a small-end circumferential reinforcing rib. The small-end circumferential reinforcing ribs in adjacent small-end reinforcing modules are connected by a screw connection.

[0006] A portal-shaped support is provided on the housing, and the portal-shaped support is supported at the bottom of the small end reinforcing module.

[0007] Optionally, it also includes multiple large-end reinforcing modules, which are disposed on the large end of the conical shell. Each large-end reinforcing module includes a large-end longitudinal pad, a large-end longitudinal reinforcing beam, and a large-end circumferential reinforcing rib. The large-end longitudinal pad is disposed on the large end of the conical shell, and the large-end longitudinal reinforcing beam is connected to the large-end longitudinal pad through a large-end longitudinal connecting plate. At least one side of the large-end longitudinal reinforcing beam is provided with a large-end circumferential reinforcing rib, and the large-end circumferential reinforcing ribs in adjacent large-end reinforcing modules are connected by a screw connection.

[0008] Axial support is provided to connect the large-end reinforcing module to the large-end cylinder.

[0009] Optionally, the portal frame includes a horizontal plate connecting lug and a portal frame. The side of the portal frame is fixed to the housing by means of a bolted connection between the horizontal plate connecting lug and the horizontal plate connecting plate. The bottom of the portal frame is connected to the housing by means of a bolted connection between the horizontal plate connecting lug and the vertical plate connecting plate.

[0010] Optionally, the axial support includes an axial connecting plate and an axial connecting pad, the axial connecting pad being disposed on the large end cylinder, and the large end longitudinal reinforcing beam being connected to the axial connecting pad by means of a screw connection with the axial connecting plate.

[0011] Optionally, the small-end circumferential reinforcing ribs are uniformly arranged on one side or uniformly staggered on both sides along the small-end longitudinal reinforcing beam, and the large-end circumferential reinforcing ribs are uniformly arranged on one side or uniformly staggered on both sides along the large-end longitudinal reinforcing beam.

[0012] Optionally, the distance between the small end circumferential reinforcing rib located at the end of each side and the end of the small end longitudinal reinforcing beam is 100mm to 500mm, and the distance between adjacent small end circumferential reinforcing ribs is 500mm to 1000mm.

[0013] Optionally, the distance between the large end circumferential reinforcing rib located at the end of each side and the end of the large end longitudinal reinforcing beam is 100mm to 500mm, and the distance between adjacent large end circumferential reinforcing ribs is 500mm to 1000mm.

[0014] Optionally, the portal frame includes an arched area and two vertical plate areas.

[0015] Optionally, the small-end reinforcing modules are arranged in a circumferentially spaced manner on the arched area, with a maximum circumferential spacing angle Xθmax:

[0016]

[0017] Wherein, XR is the inner radius of the small-end circumferential reinforcing rib, that is, the outer radius of the arched area.

[0018] Optionally, the plurality of large-end reinforcing modules are arranged circumferentially at intervals along the large end of the conical shell, with a maximum circumferential interval angle Dθmax:

[0019]

[0020] Wherein, DR is the inner radius of the large-end circumferential stiffener.

[0021] This invention provides a combined internal reinforcement structure, the advantages of which are:

[0022] 1. In this combined internal reinforcement structure, by setting small end reinforcement modules and large end reinforcement modules at the small end and large end of the cone shell respectively, the strength problem of the large and small ends of the cone shell is effectively solved. It can be flexibly applied to the strength design of various cone shells (including cone shells with large semi-apex angles).

[0023] 2. This combined internal reinforcement structure is located inside the shell and belongs to the shell internal components. Except for a few fixed parts, the rest of the components are periodically replaceable parts. Its design life can be lower than the shell life. Therefore, the mechanical properties and process properties of the materials selected for this combined internal reinforcement structure are lower than those of pressure vessel special steel. Its manufacturing materials are not limited to pressure vessel special materials, and the corresponding material, manufacturing and inspection costs are reduced.

[0024] 3. In this combined internal reinforcement structure, the connections between the various internal components and between the combined reinforcement structure and the shell are all bolted. Except for the fasteners, all other components can be installed and disassembled through the manhole, making regular maintenance and replacement highly convenient.

[0025] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same parts in the exemplary embodiments of the invention.

[0027] Figure 1 A transverse schematic diagram of a combined internal reinforcement structure according to an embodiment of the present invention is shown.

[0028] Figure 2 It shows Figure 1 A sectional view of AA.

[0029] Figure 3 An external schematic diagram of the housing according to an embodiment of the present invention is shown.

[0030] Figure 4A schematic diagram of a portal frame support according to an embodiment of the present invention is shown.

[0031] Figure 5 A schematic diagram showing the positions of the small-end circumferential reinforcing ribs on both sides of the small-end longitudinal reinforcing beam according to the present invention is provided.

[0032] Figure 6 It shows Figure 5 View B.

[0033] Figure 7 A schematic diagram showing the positions of the large-end circumferential reinforcing ribs arranged on both sides of the large-end longitudinal reinforcing beam according to the present invention is provided.

[0034] Figure 8 It shows Figure 7 The C-direction view.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Manhole; 2. Shell; 3. Small-end cylinder; 4. Small end of conical shell; 5. Large end of conical shell; 6. Large-end cylinder; 7. Small-end reinforcing module; 71. Small-end longitudinal reinforcing beam; 72. Small-end circumferential reinforcing rib; 73. Small-end longitudinal pad; 74. Small-end longitudinal connecting plate; 75. Small-end longitudinal connecting bolts and nuts; 76. Small-end circumferential connecting bolts and nuts; 8. Portal support; 81. Portal frame; 811. Arch area; 812. Vertical plate area; 813. Connecting plate; 814. Connecting bolts and nuts; 82. Horizontal 83. Horizontal plate connecting lug; 84. Horizontal plate connecting bolts and nuts; 85. Vertical plate connecting plate; 86. Vertical plate connecting bolts and nuts; 9. Large end reinforcing module; 91. Large end longitudinal reinforcing beam; 92. Large end circumferential reinforcing rib; 10. Large end longitudinal pad; 11. Large end longitudinal connecting plate; 12. Large end longitudinal connecting bolts and nuts; 13. Large end circumferential connecting bolts and nuts; 14. Axial support; 141. Axial connecting plate; 142. Axial connecting pad; 143. Axial connecting bolts and nuts. Detailed Implementation

[0037] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0038] This invention provides a combined internal reinforcement structure, which is disposed inside a shell. The shell includes a small-end cylinder, a small-end conical shell, a large-end conical shell, and a large-end cylinder. The combined internal reinforcement structure includes:

[0039] Multiple small-end reinforcing modules are disposed on the small end of the conical shell. The small-end reinforcing modules are disposed inside the shell along the axial direction of the small-end cylinder. Each small-end reinforcing module includes a small-end longitudinal pad, a small-end longitudinal reinforcing beam, and a small-end circumferential reinforcing rib. The small-end longitudinal pad is disposed on the small end of the conical shell. The small-end longitudinal reinforcing beam is connected to the small-end longitudinal pad through a small-end longitudinal connecting plate. At least one side of the small-end longitudinal reinforcing beam is provided with a small-end circumferential reinforcing rib. The small-end circumferential reinforcing ribs in adjacent small-end reinforcing modules are connected by screw connection.

[0040] A portal-shaped support is installed on the shell and supports the bottom of the small end reinforcing module.

[0041] Specifically, the combined internal reinforcement structure is located inside the shell. The conical shell is off-conical. The shell is arranged axially with a small-end cylinder, a small end of the conical shell, a large end of the conical shell, a large-end cylinder, a large end of the conical shell, a small end of the conical shell, and a small-end cylinder. Multiple small-end reinforcement modules are set on the small end of the conical shell. They are set inside the small end of the conical shell by a longitudinal pad. The longitudinal reinforcement beam of the small end is bolted to the longitudinal pad. Multiple circumferential reinforcement ribs are set on the side of the longitudinal reinforcement beam of the small end. In this way, multiple small-end reinforcement modules are evenly distributed on the inner circumference of the small end of the conical shell. In addition, the circumferentially arranged small-end reinforcement modules are interconnected by the circumferential reinforcement ribs. This allows multiple small-end reinforcement modules to be connected into a whole, improving the load-bearing capacity of the entire small-end reinforcement module and the small end of the conical shell. Each small-end reinforcing module is supported at its bottom by a portal frame, ensuring that the circumferentially positioned modules maintain a fixed shape and position. This supports the structure of the small end of the conical shell, improving the internal bearing capacity of the shell wall and preventing deformation under significant additional loads. When the shell is not under pressure, the small-end reinforcing modules also do not deform under stress. The positions of the small-end reinforcing modules and the portal frames are relatively fixed, with no direct connection between them. When the small end of the conical shell is under pressure, the small-end reinforcing modules deform towards the bottom of the shell. The portal frames then support the bottom of the small-end reinforcing modules, preventing deformation due to excessive pressure.

[0042] Optionally, it also includes multiple large-end reinforcing modules, which are disposed on the large end of the conical shell. Each large-end reinforcing module includes a large-end longitudinal pad, a large-end longitudinal reinforcing beam, and a large-end circumferential reinforcing rib. The large-end longitudinal pad is disposed on the large end of the conical shell, and the large-end longitudinal reinforcing beam is connected to the large-end longitudinal pad through a large-end longitudinal connecting plate. At least one side of the large-end longitudinal reinforcing beam is provided with a large-end circumferential reinforcing rib, and the large-end circumferential reinforcing ribs in adjacent large-end reinforcing modules are connected by a screw connection.

[0043] Axial support connects the large-end reinforcing module to the large-end cylinder.

[0044] Specifically, multiple large-end reinforcing modules are circumferentially arranged on the inner periphery of the large end of the conical shell. Each large-end reinforcing module is connected to the large end of the conical shell through a large-end longitudinal pad and a large-end longitudinal connecting plate. The large-end longitudinal reinforcing beam is finally connected to the large-end longitudinal connecting plate. Large-end circumferential reinforcing ribs are arranged on the side of the large-end longitudinal reinforcing beam. In this way, the large-end circumferential reinforcing ribs in adjacent large-end reinforcing modules fit together and can be fixedly connected by bolts. This allows multiple large-end reinforcing modules on the same cross-section of the large end of the conical shell to be connected into a whole, effectively supporting the shell from the inside of the large end of the conical shell. In addition, the large-end longitudinal reinforcing beam of the large-end reinforcing module is connected and fixed to the large-end cylinder through axial support, which effectively shortens the unsupported span of the large-end reinforcing beam and improves the load-bearing capacity of the entire large-end reinforcing module and the large end of the conical shell.

[0045] This combined internal reinforcement structure can solve the strength problem of the large and small ends of the conical shell. Furthermore, according to the end strength requirements of the conical shell, the small end reinforcement module and the large end reinforcement module can be used separately, which can be flexibly applied to the strength design of various conical shells.

[0046] It should also be noted that in this combined internal reinforcement structure, the adjectives used, such as "large" and "small," are defined based on the diameter of the shell. Specifically, the conical shell end connected to the small end cylinder is called the small end of the conical shell, and the conical shell end connected to the large end cylinder is called the large end of the conical shell. The directional terms used, such as "longitudinal," "lateral," and "circumferential," are based on the central axis of the shell. Specifically, longitudinal refers to the direction along or parallel to the central axis of the shell, while lateral and circumferential refer to the direction perpendicular to the central axis of the shell.

[0047] Optionally, the portal frame includes a horizontal plate connecting lug and a portal frame. The side of the portal frame is fixed to the housing by bolting to the horizontal plate connecting plate through the horizontal plate connecting lug, and the bottom of the portal frame is connected to the housing by bolting to the vertical plate connecting plate.

[0048] Optionally, the portal frame is provided with horizontal plate connecting lugs, which are connected to the horizontal plate connecting plate.

[0049] Specifically, the portal frame support includes horizontal connecting plates, vertical connecting plates, and a portal frame. Since the shell of this combined internal reinforcement structure is a conical structure, the shape of the horizontal connecting plates needs to be further determined according to the actual shape of the shell where the portal frame support is located. Each portal frame support has multiple horizontal connecting lugs evenly distributed on both sides. Each horizontal connecting lug has a stud hole for installing horizontal connecting bolts and nuts, thus achieving a bolted connection between the horizontal connecting lugs and the horizontal connecting plates, effectively preventing lateral swaying of the portal frame. Each portal frame support also has a stud hole at its bottom, where vertical connecting bolts and nuts are installed to connect the vertical connecting plates to the portal frame, fixing the portal frame support in place. The portal frame support in this combined internal reinforcement structure shortens the longitudinal support span of the small-end reinforcement module, improving its load-bearing capacity.

[0050] Optionally, the axial support includes an axial connecting plate and an axial connecting pad. The axial connecting pad is disposed on the large end cylinder, and the large end longitudinal reinforcing beam is connected to the axial connecting pad by bolting to the axial connecting plate.

[0051] Specifically, in each axial support, two stud holes are opened at the bottom of the axial connecting plate for installing axial connecting bolts and nuts. This allows the axial connecting plate to be bolted to the large-end longitudinal reinforcing beam. The other end of the axial connecting plate is fixed to the axial connecting pad. The purpose of setting axial supports in this combined internal reinforcement structure is to improve the strength of the large-end reinforcing module by shortening the longitudinal support span of the large-end reinforcing module, so as to meet more stringent load-bearing conditions.

[0052] Optionally, the small-end circumferential reinforcing ribs are uniformly arranged on one side or uniformly staggered on both sides along the small-end longitudinal reinforcing beam, and the large-end circumferential reinforcing ribs are uniformly arranged on one side or uniformly staggered on both sides along the large-end longitudinal reinforcing beam.

[0053] Specifically, longitudinal reinforcing beams are installed at either the large or small end of the conical shell. Circumferential reinforcing ribs are installed on one or both sides of these beams. If circumferential reinforcing ribs are installed on one side, the distance between the first circumferential reinforcing rib and the end of the longitudinal reinforcing beam should be at least 300mm, and the spacing between the other circumferential reinforcing ribs should be the same, at least 600mm. If circumferential reinforcing ribs are installed on both sides, in addition to ensuring that the first circumferential reinforcing rib on each side is spaced a certain distance from the end of the longitudinal reinforcing beam, the spacing between the remaining circumferential reinforcing ribs on both sides should also be the same. This ensures that the circumferential reinforcing ribs on both sides are evenly staggered. Regardless of whether multiple large-end reinforcing modules and multiple small-end reinforcing modules are installed at either the large or small end of the conical shell, the large-end and small-end reinforcing modules located at the ends use small-end circumferential reinforcing ribs evenly arranged on one side near the outer edge of the large-end and small-end longitudinal reinforcing beams, while the remaining large-end and small-end longitudinal reinforcing beams use evenly staggered arrangements on both sides.

[0054] Optionally, the distance between the small end circumferential reinforcing rib and the end of the small end longitudinal reinforcing beam on each side is 100mm to 500mm, and the distance between adjacent small end circumferential reinforcing ribs is 500mm to 1000mm.

[0055] Optionally, the distance between the large end circumferential stiffener and the end of the large end longitudinal stiffener on each side is 100mm to 500mm, and the distance between adjacent large end circumferential stiffeners is 500mm to 1000mm.

[0056] Optionally, the portal frame includes an arched section and two vertical plate sections.

[0057] Specifically, a manhole is provided on the shell. To ensure that the portal frame can be sent into the shell through the manhole, the portal frame is designed in sections. It can be composed of an arched area and two vertical plate areas. The vertical plate areas are connected to the two ends of the arched area by bolts. It is necessary to ensure that the width of the vertical plate area and the arched area is less than the inner diameter of the manhole. It is also necessary to ensure that the maximum span of the vertical plate area and the arched area is less than the inner diameter of the manhole. Alternatively, at least one part of the arched area or the vertical plate area can be disassembled, as long as it can be ensured that the portal component can pass through the manhole normally after being disassembled.

[0058] Example

[0059] like Figures 1 to 8 As shown, the present invention provides a combined internal reinforcement structure, which is disposed inside a housing 2. The housing 2 includes a small-end cylinder 3, a small-end conical shell 4, a large-end conical shell 5, a large-end cylinder 6, and a manhole 1. The combined internal reinforcement structure includes:

[0060] Multiple small-end reinforcing modules 7 are disposed on the small end 4 of the conical shell. The small-end reinforcing modules 7 are disposed inside the shell 2 along the axial direction of the small-end cylinder 3. The small-end reinforcing modules 7 include a small-end longitudinal pad 73, a small-end longitudinal reinforcing beam 71, and a small-end circumferential reinforcing rib 72. The small-end longitudinal pad 73 is disposed on the small end 4 of the conical shell. The small-end longitudinal reinforcing beam 71 is connected to the small-end longitudinal pad 73 through a small-end longitudinal connecting plate 74. At least one side of the small-end longitudinal reinforcing beam 71 is provided with a small-end circumferential reinforcing rib 72. The small-end circumferential reinforcing ribs 72 in adjacent small-end reinforcing modules 7 are connected by small-end circumferential connecting bolts and nuts 76.

[0061] A portal-shaped support 8 is mounted on the housing 2 and supports the bottom of the small end reinforcing module 7.

[0062] In this embodiment, multiple large-end reinforcing modules 9 are also included. The large-end reinforcing modules 9 are disposed on the large end 5 of the conical shell. The large-end reinforcing modules 9 include a large-end longitudinal pad 10, a large-end longitudinal reinforcing beam 91, and a large-end circumferential reinforcing rib 92. The large-end longitudinal pad 10 is disposed on the large end 5 of the conical shell. The large-end longitudinal reinforcing beam 91 is connected to the large-end longitudinal pad 10 through a large-end longitudinal connecting plate 11. The large-end longitudinal reinforcing beam 91 and the large-end longitudinal connecting plate 11 are connected by large-end longitudinal connecting bolts and nuts 12. At least one side of the large-end longitudinal reinforcing beam 91 is provided with a large-end circumferential reinforcing rib 92. The large-end circumferential reinforcing ribs 92 in adjacent large-end reinforcing modules 9 are connected by large-end circumferential connecting bolts and nuts 13.

[0063] Axial support 14 connects the large end reinforcing module 9 to the large end cylinder 6.

[0064] In this embodiment, the portal frame 8 includes a horizontal connecting plate 83, a vertical connecting plate 85, and a portal frame 81. The horizontal connecting plate 83 and the vertical connecting plate 85 are respectively disposed on the housing 2. The portal frame 81 is provided with a horizontal connecting lug 82. The horizontal connecting lug 82 and the horizontal connecting plate 83 are connected together by horizontal connecting bolts and nuts 84. The portal frame 81 and the vertical connecting plate 85 are connected by vertical connecting bolts and nuts 86.

[0065] In this embodiment, the axial support 14 includes an axial connecting plate 141 and an axial connecting pad 142. The axial connecting pad 142 is disposed on the large end cylinder 6. The large end longitudinal reinforcing beam 91 is connected to the axial connecting pad 142 by means of screwing to the axial connecting plate 141. The axial connecting pad 142 is connected to the large end longitudinal reinforcing beam 91 by means of axial connecting bolts and nuts 143.

[0066] In this embodiment, the small-end circumferential reinforcing ribs 72 are uniformly arranged on one side or uniformly staggered on both sides along the small-end longitudinal reinforcing beam 71, and the large-end circumferential reinforcing ribs 92 are uniformly arranged on one side or uniformly staggered on both sides along the large-end longitudinal reinforcing beam 91.

[0067] In this embodiment, the distance between the end of the small-end circumferential reinforcing rib 72 and the end of the small-end longitudinal reinforcing beam 71 is 100mm to 500mm, and the distance between adjacent small-end circumferential reinforcing ribs 72 is 500mm to 1000mm.

[0068] In this embodiment, the distance between the end of the large-end circumferential reinforcing rib 92 and the end of the large-end longitudinal reinforcing beam 91 is 100mm to 500mm, and the distance between adjacent large-end circumferential reinforcing ribs 92 is 500mm to 1000mm.

[0069] In this embodiment, the portal frame 81 includes an arched area 811 and two vertical plate areas 812. The end of the arched area 811 is connected to the vertical plate area 812 through a connecting plate 813 and connecting bolts and nuts 814.

[0070] In this embodiment, the small-end reinforcing modules 7 are arranged in a circumferentially spaced manner on the arched area 811, with a maximum circumferential spacing angle Xθmax:

[0071]

[0072] Where XR is the inner radius of the small-end circumferential stiffener, that is, the outer radius of the arched area 811.

[0073] In this embodiment, the portal supports 8 are arranged axially at intervals along the central axis of the housing 2, and the maximum clearance distance ΔXLmax is 2000mm.

[0074] In this embodiment, multiple large-end reinforcing modules 9 are arranged circumferentially at intervals along the large end 5 of the conical shell, with a maximum circumferential interval angle Dθmax:

[0075]

[0076] Wherein, DR is the inner radius of the large-end circumferential stiffener.

[0077] In summary, the inner diameter of the manhole 1 of the housing 2 is Dmi = 800mm, the nominal diameter of the small-end cylinder 3 is DN1600mm, the nominal diameter of the large-end cylinder 6 is DN3300mm, the axial length of the large-end cylinder 6 is 6000mm, the axial length of the oblique cone is 1700mm, and the calculated cone angle is 45°. The outer radius of the portal frame 81 is designed to be XR = 840mm, the thickness of the steel plate used for the portal frame 81 is 20mm, and the width is G1 = 200mm. The maximum circumferential spacing angle Xθmax of the small-end reinforcing module 7 is calculated using the formula: Given that the shell 2 in this embodiment is subjected to various demanding design conditions, for the sake of conservatism, a total of nine small-end reinforcing modules 7 are evenly arranged at circumferential intervals of 18° (less than 34°) along the arched area 811 of the portal frame 81 at the small end 4 of the conical shell. These include nine small-end longitudinal reinforcing beams 71 made of flat steel with a specification of 100x20 mm, 18 small-end longitudinal pads 73, 18 small-end longitudinal connecting plates 74, and 36 sets of small-end longitudinal connecting bolts and nuts 75. Furthermore, this disclosure does not limit the thickness of the materials used for the small-end longitudinal reinforcing beams 71, small-end longitudinal pads 73, and small-end longitudinal connecting plates 74, or the specifications of the small-end longitudinal connecting bolts and nuts 75; adaptive designs can be made as needed. A large-end reinforcing module 9 is provided at the large end 5 of the conical shell. The large-end reinforcing modules 9 are evenly arranged at circumferential intervals along a radius DR (large-end circumferential reinforcing rib) = 1000 mm, corresponding to the maximum circumferential interval angle Dθmax: Given that the shell 2 in this embodiment is subjected to various demanding design conditions, for the sake of conservatism, a total of nine large-end reinforcing modules 9 are evenly arranged at equal intervals of 18° (less than 28.6°) around the large end 5 of the conical shell, along a radius DR (large end circumferential reinforcing rib) = 1000mm. These modules include nine large-end longitudinal reinforcing beams 91 made of flat steel with a specification of 100x20 mm, 18 large-end longitudinal pads 10, 18 large-end longitudinal connecting plates 11, and 36 sets of large-end longitudinal connecting bolts and nuts 12. In addition, this disclosure does not limit the thickness of the materials used for the large-end longitudinal reinforcing beams 91, large-end longitudinal pads 10, and large-end longitudinal connecting plates 11, or the specifications of the large-end longitudinal connecting bolts and nuts 12, and can be adapted to meet specific needs.

[0078] In this combined internal reinforcement structure, a portal support 8 is provided in the front and rear deflected cones at axial intervals of 2000mm, 1800mm, 1800mm and 2000mm along the central axis of the shell 2, and three portal supports 8 are provided in the large end cylinder 6, for a total of five portal supports 8.

[0079] In this combined internal reinforcement structure, since the passage size G of the portal frame is 1632mm, it cannot be installed into the shell 2 through the manhole 1. Therefore, the portal frame 8 is set as a segmented structure, consisting of an arched area 811 and two vertical plate areas 812. Thus, the passage size G of the portal frame 8 is max(G1,G2,G3,G4) = max(200mm, 204mm, 328mm, 251mm) = 328mm, which is less than the inner diameter of the manhole (1), thus meeting the requirement for installation through the manhole. In addition, in order to allow the small-end reinforcement module and the large-end reinforcement module to be inserted into the housing 2 through the manhole, the small-end reinforcement module 7 needs to be designed as follows: XT = max(XT1,XT2) = max(578mm,159mm) = 578mm; and the large-end reinforcement module 9 needs to be designed as follows: DT = max(DT1,DT2) = max(691mm,149mm) = 691mm. Both of these are smaller than the inner diameter of the manhole, which meets the installation requirements.

[0080] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A combined internal reinforcing structure, wherein the combined internal reinforcing structure is disposed inside a shell, the shell comprising a small-end cylindrical section, a small-end conical shell, a large-end conical shell, and a large-end cylindrical section, characterized in that, The combined internal reinforcement structure includes: Multiple small-end reinforcing modules are disposed on the small end of the conical shell. The small-end reinforcing modules are disposed within the shell along the axial direction of the small-end cylinder. Each small-end reinforcing module includes a small-end longitudinal pad, a small-end longitudinal reinforcing beam, and a small-end circumferential reinforcing rib. The small-end longitudinal pad is disposed on the small end of the conical shell. The small-end longitudinal reinforcing beam is connected to the small-end longitudinal pad through a small-end longitudinal connecting plate. At least one side of the small-end longitudinal reinforcing beam is provided with a small-end circumferential reinforcing rib. The small-end circumferential reinforcing ribs in adjacent small-end reinforcing modules are connected by a screw connection. A portal-shaped support is provided on the housing, and the portal-shaped support is supported at the bottom of the small end reinforcing module; Multiple large-end reinforcing modules are disposed on the large end of the conical shell. Each large-end reinforcing module includes a large-end longitudinal pad, a large-end longitudinal reinforcing beam, and a large-end circumferential reinforcing rib. The large-end longitudinal pad is disposed on the large end of the conical shell. The large-end longitudinal reinforcing beam is connected to the large-end longitudinal pad through a large-end longitudinal connecting plate. At least one side of the large-end longitudinal reinforcing beam is provided with a large-end circumferential reinforcing rib. The large-end circumferential reinforcing ribs in adjacent large-end reinforcing modules are connected by screw connections. Axial support is provided to connect the large-end reinforcing module to the large-end cylinder.

2. The combined internal reinforcement structure according to claim 1, characterized in that, The portal frame includes a horizontal plate connecting lug and a portal frame. The side of the portal frame is fixed to the housing by means of a screw connection between the horizontal plate connecting lug and the horizontal plate connecting plate. The bottom of the portal frame is connected to the housing by means of a screw connection between the horizontal plate connecting lug and the vertical plate connecting plate.

3. The combined internal reinforcement structure according to claim 1, characterized in that, The axial support includes an axial connecting plate and an axial connecting pad. The axial connecting pad is disposed on the large end cylinder, and the large end longitudinal reinforcing beam is connected to the axial connecting pad by means of a screw connection with the axial connecting plate.

4. The combined internal reinforcement structure according to claim 1, characterized in that, The small-end circumferential reinforcing ribs are uniformly arranged on one side or uniformly staggered on both sides along the small-end longitudinal reinforcing beam, and the large-end circumferential reinforcing ribs are uniformly arranged on one side or uniformly staggered on both sides along the large-end longitudinal reinforcing beam.

5. The combined internal reinforcement structure according to claim 1, characterized in that, The distance between the small end circumferential reinforcing ribs located at the ends on each side and the ends of the small end longitudinal reinforcing beams is 100mm to 500mm, and the distance between adjacent small end circumferential reinforcing ribs is 500mm to 1000mm.

6. The combined internal reinforcement structure according to claim 1, characterized in that, The distance between the large end circumferential reinforcing rib and the end of the large end longitudinal reinforcing beam on each side is 100mm~500mm, and the distance between adjacent large end circumferential reinforcing ribs is 500mm~1000mm.

7. The combined internal reinforcement structure according to claim 2, characterized in that, The portal frame includes an arched area and two vertical plate areas.

8. The combined internal reinforcement structure according to claim 7, characterized in that, The small-end reinforcing modules are arranged in a circumferential interval on the arched area, with the maximum circumferential interval angle being [missing information]. : Wherein, XR is the inner radius of the small-end circumferential reinforcing rib, that is, the outer radius of the arched area.

9. The combined internal reinforcement structure according to claim 1, characterized in that, Multiple large-end reinforcing modules are arranged circumferentially at intervals along the large end of the conical shell, with a maximum circumferential interval angle. : Wherein, DR is the inner radius of the large-end circumferential stiffener.

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