Combined internal reinforcing structure

Abstract

The invention discloses a combined internal reinforcing structure, and relates to the technical field of composite pressure vessels for petrochemical engineering, the combined internal reinforcing structure comprises a plurality of small-end reinforcing modules arranged at the small end of a conical shell, the small-end reinforcing modules are arranged in the shell along the axis direction of a small-end cylinder, and the small-end reinforcing modules are arranged in the shell along the axis direction of the small-end cylinder; the small-end reinforcing module comprises a small-end longitudinal base plate, a small-end longitudinal reinforcing beam and a small-end annular reinforcing rib, the small-end longitudinal base plate is arranged at the small end of the conical shell, the small-end longitudinal reinforcing beam is connected with the small-end longitudinal base plate through a small-end longitudinal connecting plate, and the small-end annular reinforcing rib is arranged on at least one side of the small-end longitudinal reinforcing beam; the small-end annular reinforcing ribs in the adjacent small-end reinforcing modules are connected in a threaded connection mode. The door-shaped support is arranged on the shell, and the door-shaped support is supported at the bottom of the small-end reinforcing module; the small end reinforcing structure is arranged at the small end of the conical shell, so that the strength problem of the conical shell can be effectively solved, and the manufacturing cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of composite pressure vessels for petrochemical industry, and more particularly relates to a combined internal reinforcement structure. BACKGROUND

[0002] For a pressure vessel with a conical shell (normal or inclined cone) connecting a small-end cylinder and a large-end cylinder structure, it is classified as a composite pressure vessel according to the shape. From the perspective of strength design, the connection structure of the small-end and large-end of the conical shell and the cylinder has a large mutation and discontinuity due to the structure itself, and there is a deformation coordination, so a large additional load is often formed at the small-end of the conical shell and the large-end of the conical shell. In order to resist this part of the additional load, the connection between the conical shell and the cylinder needs to be strengthened. The common methods currently used include directly increasing the shell thickness of the small-end cylinder (within a certain range from the connection), the conical shell and the large-end cylinder (within a certain range from the connection), or setting a reinforcement ring locally on the shell. However, when directly increasing the shell thickness, the shell thickness specification will directly lead to a significant increase in the cost of materials, manufacturing and inspection, etc. due to the fact that the pressure-bearing shell is a special steel for pressure vessels, so this method is less economical. When a reinforcement ring is locally set on the shell, there are great limitations in the design, especially when dealing with a conical shell transition structure with a large semi-apex angle, which cannot effectively solve the strength problem. SUMMARY

[0003] The purpose of the present application is to overcome the deficiencies of the prior art, and to provide a combined internal reinforcement structure which sets a small-end reinforcement structure at the small-end of the conical shell, effectively solves the strength problem of the conical shell, and reduces the manufacturing cost.

[0004] In order to achieve the above-mentioned purpose, the present application provides a combined internal reinforcement structure, which is arranged inside a shell, the shell comprising a small-end cylinder, a small-end of a conical shell, a large-end of a conical shell and a large-end cylinder, and the combined internal reinforcement structure comprising:

[0005] A plurality of small-end reinforcement modules are arranged on the small-end of the conical shell, the small-end reinforcement modules being arranged in the shell along the axial direction of the small-end cylinder, the small-end reinforcement module comprising a small-end longitudinal pad plate, a small-end longitudinal reinforcement beam and a small-end annular reinforcement rib, the small-end longitudinal pad plate being arranged on the small-end of the conical shell, the small-end longitudinal reinforcement beam being connected to the small-end longitudinal pad plate through a small-end longitudinal connecting plate, at least one side of the small-end longitudinal reinforcement beam being provided with a small-end annular reinforcement rib, and the small-end annular reinforcement ribs in adjacent small-end reinforcement modules being connected in a screwing manner;

[0006] A door-type support is arranged on the shell and supported at the bottom of the small-end reinforcement module.

[0007] Optionally, a plurality of large-end reinforcing modules are further included, which are arranged on the large end of the conical shell, and each of the large-end reinforcing modules comprises a large-end longitudinal pad plate, a large-end longitudinal reinforcing beam and a large-end annular reinforcing rib, the large-end longitudinal pad plate is arranged on the large end of the conical shell, the large-end longitudinal reinforcing beam is connected with the large-end longitudinal pad plate through a large-end longitudinal connecting plate, at least one side of the large-end longitudinal reinforcing beam is provided with a large-end annular reinforcing rib, and the large-end annular reinforcing ribs in adjacent large-end reinforcing modules are connected in a screwing manner.

[0008] Optionally, an axial support is further included, which connects the large-end reinforcing modules with the large-end cylinder.

[0009] Optionally, the door-type support comprises a horizontal plate connecting lug and a door-type framework, the side surface of the door-type framework is fixed to the shell through the horizontal plate connecting lug and the horizontal plate connecting plate in a screwing manner, and the bottom of the door-type framework is connected to the shell through the vertical plate connecting plate in a screwing manner.

[0010] Optionally, the axial support comprises an axial connecting plate and an axial connecting pad plate, the axial connecting pad plate is arranged on the large-end cylinder, and the large-end longitudinal reinforcing beam is connected to the axial connecting pad plate in a screwing manner through the axial connecting plate.

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

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

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

[0014] Optionally, the door-type framework comprises an arc region and two vertical plate regions.

[0015] Optionally, the small-end reinforcing modules are arranged in an annular interval on the arc region, and the maximum annular interval angle Xθmax is:

[0016]

[0017] wherein XR is the inner radius of the small-end annular reinforcing rib, i.e. the outer radius of the arc region.

[0018] Optionally, the plurality of large-end reinforcing modules are arranged in a ring direction at the large end of the conical shell with a maximum ring direction spacing angle Dθmax.

[0019]

[0020] DR is the inner radius of the large-end ring direction reinforcing rib.

[0021] The present application provides a combined internal reinforcing structure, which has the advantages of:

[0022] 1. In the combined internal reinforcing structure, the small-end reinforcing module and the large-end reinforcing module are arranged at the small end and the large end of the conical shell respectively, which effectively solves the strength problem of the small end and the large end of the conical shell, and can be flexibly applied to the strength design of various conical shells (including conical shells with a large half-angle);

[0023] 2. The combined internal reinforcing structure is arranged inside the shell and belongs to the shell inner part. Except for a small number of fixed parts, the remaining parts are in the category of regularly replaceable parts, and the design life can be lower than the shell life. Therefore, the mechanical properties and process properties of the selected materials of the combined internal reinforcing structure are lower than those of the special steel for pressure vessels, and the manufacturing materials are not limited to the special materials for pressure vessels. Accordingly, the material, manufacturing and inspection costs are reduced.

[0024] 3. In the combined internal reinforcing structure, the connection between each internal part and the connection between the combined reinforcing structure and the shell are all achieved by bolt connection. Except for the fixed parts, the remaining parts can be installed and disassembled through the manhole, and the regular maintenance and replacement are convenient.

[0025] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and in which:

[0027] Figure 1 A transverse schematic view of a combined internal reinforcing structure according to one embodiment of the present application is shown.

[0028] Figure 2 A cross-sectional view of A-A of Figure 1 is shown.

[0029] Figure 3 An external schematic view of a shell according to one embodiment of the present application is shown.

[0030] Figure 4A structural diagram of a door type support according to one embodiment of the present application is shown.

[0031] Figure 5 A position diagram of small-end hoop stiffeners arranged on both sides of a small-end longitudinal stiffening beam according to the present application is shown.

[0032] Figure 6 A B view of Figure 5 is shown.

[0033] Figure 7 A position diagram of large-end hoop stiffeners arranged on both sides of a large-end longitudinal stiffening beam according to the present application is shown.

[0034] Figure 8 A C view of Figure 7 is shown.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1, manhole; 2, shell; 3, small-end cylinder; 4, conical shell small end; 5, conical shell large end; 6, large-end cylinder; 7, small-end reinforcing module; 71, small-end longitudinal stiffening beam; 72, small-end hoop stiffener; 73, small-end longitudinal gusset; 74, small-end longitudinal connecting plate; 75, small-end longitudinal connecting bolt and nut; 76, small-end hoop connecting bolt and nut; 8, door type support; 81, door type frame; 811, round arch area; 812, vertical plate area; 813, connecting plate; 814, connecting bolt and nut; 82, horizontal plate connecting lug; 83, horizontal plate connecting plate; 84, horizontal plate connecting bolt and nut; 85, vertical plate connecting plate; 86, vertical plate connecting bolt and nut; 9, large-end reinforcing module; 91, large-end longitudinal stiffening beam; 92, large-end hoop stiffener; 10, large-end longitudinal gusset; 11, large-end longitudinal connecting plate; 12, large-end longitudinal connecting bolt and nut; 13, large-end hoop connecting bolt and nut; 14, axial support; 141, axial connecting plate; 142, axial connecting gusset; 143, axial connecting bolt and nut. DETAILED DESCRIPTION

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

[0038] The present application provides a combined internal reinforcing structure, which is arranged inside a shell including a small-end cylinder, a conical shell small end, a conical shell large end, and a large-end cylinder, and includes:

[0039] A plurality of small-end reinforcing modules are arranged on the small end of the conical shell, the small-end reinforcing modules are arranged in the shell along the axial direction of the small-end cylinder, the small-end reinforcing module comprises a small-end longitudinal pad plate, a small-end longitudinal reinforcing beam and a small-end annular reinforcing rib, the small-end longitudinal pad plate is arranged on the small end of the conical shell, the small-end longitudinal reinforcing beam is connected with the small-end longitudinal pad plate through a small-end longitudinal connecting plate, at least one side of the small-end longitudinal reinforcing beam is provided with the small-end annular reinforcing rib, and the small-end annular reinforcing ribs in adjacent small-end reinforcing modules are connected in a screwing mode;

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

[0041] Specifically, the combined internal reinforcing structure is arranged on the inner side of the shell, the conical shell is a partial cone, the shell is sequentially provided 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 along the axial direction, a plurality of small-end reinforcing modules are arranged on the small-end of the conical shell, the small-end longitudinal pad plate is arranged on the inner side of the small-end of the conical shell, the small-end longitudinal reinforcing beam is screw-connected with the small-end longitudinal pad plate, the side of the small-end longitudinal reinforcing beam is provided with a plurality of small-end annular reinforcing ribs, so that the plurality of small-end reinforcing modules are uniformly distributed on the inner periphery of the small-end of the conical shell, in addition, the circumferentially arranged small-end reinforcing modules are connected with each other through the small-end annular reinforcing ribs, so that the plurality of small-end reinforcing modules can be connected into a whole, and the bearing capacity of the whole small-end reinforcing module and the small-end of the conical shell is improved. The bottom of each small-end reinforcing module is supported by the door-shaped support, so that the small-end reinforcing modules arranged in the circumferential direction can always maintain a fixed shape position, the structure of the small-end of the conical shell is supported, the internal pressure bearing capacity of the shell wall is improved, and deformation does not occur when the shell is subjected to a large additional load. When the shell is not subjected to pressure, the small-end reinforcing module does not deform under stress, the position of the small-end reinforcing module and the door-shaped support is relatively fixed, and there is no direct connection relationship between the two, when the small-end of the conical shell is subjected to pressure, the small-end reinforcing module deforms under pressure and deforms towards the bottom of the shell, so that the door-shaped support can support the bottom of the small-end reinforcing module and avoid deformation due to excessive pressure.

[0042] Optionally, a plurality of large-end reinforcing modules are further included, the large-end reinforcing modules are arranged on the large-end of the conical shell, the large-end reinforcing module comprises a large-end longitudinal pad plate, a large-end longitudinal reinforcing beam and a large-end annular reinforcing rib, the large-end longitudinal pad plate is arranged on the large-end of the conical shell, the large-end longitudinal reinforcing beam is connected with the large-end longitudinal pad plate through a large-end longitudinal connecting plate, at least one side of the large-end longitudinal reinforcing beam is provided with the large-end annular reinforcing rib, and the large-end annular reinforcing ribs in adjacent large-end reinforcing modules are connected in a screwing mode;

[0043] An axial support connects the large-end reinforcing module with the large-end cylinder.

[0044] Specifically, a plurality of large-end reinforcing modules are arranged circumferentially along the inner periphery of the large end of the conical shell, each of the large-end reinforcing modules is connected to the large end of the conical shell through a large-end longitudinal pad, a large-end longitudinal connecting plate, and a large-end longitudinal reinforcing beam finally connected to the large-end longitudinal connecting plate, and a large-end annular reinforcing rib is arranged on the side surface of the large-end longitudinal reinforcing beam, so that the large-end annular reinforcing ribs of adjacent large-end reinforcing modules are in close contact with each other and can be fixedly connected through screwing, so that the plurality of large-end reinforcing modules in the same cross section of the large end of the conical shell are connected into a whole to effectively support 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 cylindrical shell through axial support, effectively shortening the unsupported span of the large-end reinforcing beam and improving the load-bearing capacity of the large-end reinforcing module of the large end of the conical shell and the large end of the conical shell.

[0045] The combined internal reinforcing structure can solve the strength problem of the large and small ends of the conical shell, and the small-end reinforcing module and the large-end reinforcing module can be used separately according to the strength requirement of the end of the conical shell, so that they can be flexibly applied to the strength design of various conical shells.

[0046] It should be particularly pointed out that in the combined internal reinforcing structure, the adjectives such as "large" and "small" are defined based on the diameter of the shell, specifically, the end of the conical shell connected to the small-end cylindrical shell is referred to as the small end of the conical shell, and the end of the conical shell connected to the large-end cylindrical shell is referred to as the large end of the conical shell; the directional words such as "longitudinal", "transverse", and "annular" are divided based on the central axis of the shell, specifically, the longitudinal direction refers to the direction along or parallel to the central axis of the shell, and the transverse and annular directions refer to the direction perpendicular to the central axis of the shell.

[0047] Optionally, the door-shaped support includes a horizontal plate connecting lug and a door-shaped frame, the side surface of the door-shaped frame is fixed to the shell through the horizontal plate connecting lug and the horizontal plate connecting plate by screwing, and the bottom of the door-shaped frame is connected to the shell through the vertical plate connecting plate by screwing.

[0048] Optionally, the door-shaped frame is provided with a horizontal plate connecting lug, and the horizontal plate connecting lug is connected to the horizontal plate connecting plate.

[0049] Specifically, the door-shaped support includes a horizontal plate connecting plate, a vertical plate connecting plate and a door-shaped frame. Since the shell provided with the combined inner reinforcing structure is a conical structure, the shape of the horizontal plate connecting plate needs to be determined according to the actual shape of the shell where the door-shaped support is located. Each door-shaped support is uniformly provided with a plurality of horizontal plate connecting lugs on both sides, and a threaded hole is formed in each horizontal plate connecting lug for mounting a horizontal plate connecting bolt and a nut to achieve bolt connection of the horizontal plate connecting lug and the horizontal plate connecting plate, thereby effectively preventing the door-shaped frame from horizontally shaking. A threaded hole is formed in the bottom end of each door-shaped support, and the vertical plate connecting plate and the door-shaped frame are connected together by mounting a vertical plate connecting bolt and a nut to fix the door-shaped support. The door-shaped support provided in the combined inner reinforcing structure can shorten the longitudinal support span of the small-end reinforcing module and improve the carrying capacity of the small-end reinforcing module.

[0050] Optionally, the axial support includes an axial connecting plate and an axial connecting pad plate, and the axial connecting pad plate is arranged on the large-end cylinder. The large-end longitudinal reinforcing beam is connected to the axial connecting pad plate in a screwing manner with the axial connecting plate.

[0051] Specifically, in each axial support, two threaded holes are formed in the bottom end of the axial connecting plate for mounting an axial connecting bolt and a nut, so that the axial connecting plate and the large-end longitudinal reinforcing beam can be screwed, and the other end of the axial connecting plate is fixed to the axial connecting pad plate. The purpose of arranging the axial support in the combined inner reinforcing structure is to shorten the longitudinal support span of the large-end reinforcing module, thereby improving the strength of the large-end reinforcing module to meet more stringent carrying conditions.

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

[0053] Specifically, the longitudinal reinforcing beams are arranged on the large end or the small end of the conical shell, and the ring-shaped reinforcing ribs are arranged on one side or both sides of the longitudinal reinforcing beam. If the ring-shaped reinforcing ribs are arranged on one side, the distance between the first ring-shaped reinforcing rib and the end of the longitudinal reinforcing beam is at least 300 mm, and the distance between the other ring-shaped reinforcing ribs is the same, which is at least 600 mm. If the ring-shaped reinforcing ribs are arranged on both sides, the distance between the first ring-shaped reinforcing rib on both sides and the end of the longitudinal reinforcing beam is ensured, and the distance between the other ring-shaped reinforcing ribs on both sides is the same, so that the ring-shaped reinforcing ribs on both sides can be uniformly arranged in a staggered manner. No matter whether the multiple large-end reinforcing modules and the multiple small-end reinforcing modules are arranged on the large end or the small end of the conical shell, the large-end reinforcing module and the small-end reinforcing module located at the end are arranged with the small-end ring-shaped reinforcing ribs on one side of the large-end longitudinal reinforcing beam and the small-end longitudinal reinforcing beam close to the outer side, and the other large-end longitudinal reinforcing beams and small-end longitudinal reinforcing beams are arranged with the small-end ring-shaped reinforcing ribs on both sides in a uniform staggered manner.

[0054] Optionally, the spacing between the small-end annular reinforcement ribs at the end of each side and the end of the small-end longitudinal reinforcement beam is 100mm to 500mm, and the spacing between adjacent small-end annular reinforcement ribs is 500mm to 1000mm.

[0055] Optionally, the spacing between the large-end annular reinforcement ribs at the end of each side and the end of the large-end longitudinal reinforcement beam is 100mm to 500mm, and the spacing between adjacent large-end annular reinforcement ribs is 500mm to 1000mm.

[0056] Optionally, the portal frame includes a round arch area and two vertical plate areas.

[0057] Specifically, a manhole is provided on the shell. In order to ensure that the door-type frame can be delivered into the interior of the shell through the manhole, the door-type frame is designed in sections, which can be composed of a circular arch area and two vertical plate areas. The vertical plate areas are respectively connected to the two ends of the circular arch area by bolts to ensure that the width of the vertical plate area and the circular arch area is smaller than the inner diameter of the manhole, and it is also necessary to ensure that the maximum span of the vertical plate area and the circular arch area is smaller than the inner diameter of the manhole; at least one part of the circular arch area or the vertical plate area can also be decomposed, as long as it can be ensured that the door-type 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 arranged inside the shell 2. The shell 2 includes a small end cylinder 3, a small end of the cone shell 4, a large end of the cone shell 5, a large end cylinder 6 and a manhole 1. The combined internal reinforcement structure includes:

[0060] Multiple small end reinforcement modules 7 are arranged on the small end 4 of the cone shell. The small end reinforcement modules 7 are arranged in the shell body 2 along the axial direction of the small end cylinder 3. The small end reinforcement modules 7 include a small end longitudinal pad 73, a small end longitudinal reinforcement beam 71 and a small end annular reinforcement rib 72. The small end longitudinal pad 73 is arranged on the small end 4 of the cone shell. The small end longitudinal reinforcement 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 reinforcement beam 71 is provided with a small end annular reinforcement rib 72. The small end annular reinforcement ribs 72 in adjacent small end reinforcement modules 7 are connected using small end annular connecting bolts and nuts 76.

[0061] The door-shaped support 8 is provided on the housing 2 , and the door-shaped support 8 is supported on the bottom of the small-end reinforcement module 7 .

[0062] In the embodiment, a plurality of large-end reinforcing modules 9 are further included, which are arranged on the large-end cone shell 5. The large-end reinforcing module 9 comprises a large-end longitudinal pad plate 10, a large-end longitudinal reinforcing beam 91 and a large-end annular reinforcing rib 92. The large-end longitudinal pad plate 10 is arranged on the large-end cone shell 5. The large-end longitudinal reinforcing beam 91 is connected with the large-end longitudinal pad plate 10 through a large-end longitudinal connecting plate 11. The large-end longitudinal reinforcing beam 91 is connected with the large-end longitudinal connecting plate 11 through a large-end longitudinal connecting bolt and nut 12. At least one side of the large-end longitudinal reinforcing beam 91 is provided with the large-end annular reinforcing rib 92. The large-end annular reinforcing ribs 92 in adjacent large-end reinforcing modules 9 are connected through a large-end annular connecting bolt and nut 13.

[0063] An axial support 14 is arranged to connect the large-end reinforcing module 9 with the large-end cylinder 6.

[0064] In the embodiment, the door-type support 8 comprises a horizontal plate connecting plate 83, a vertical plate connecting plate 85 and a door-type frame 81. The horizontal plate connecting plate 83 and the vertical plate connecting plate 85 are arranged on the shell 2 respectively. The door-type frame 81 is provided with a horizontal plate connecting lug 82. The horizontal plate connecting lug 82 and the horizontal plate connecting plate 83 are connected together through a horizontal plate connecting bolt and nut 84. The door-type frame 81 and the vertical plate connecting plate 85 are connected through a vertical plate connecting bolt and nut 86.

[0065] In the embodiment, the axial support 14 comprises an axial connecting plate 141 and an axial connecting pad plate 142. The axial connecting pad plate 142 is arranged on the large-end cylinder 6. The large-end longitudinal reinforcing beam 91 is connected with the axial connecting pad plate 142 through a screwing mode with the axial connecting plate 141. The axial connecting pad plate 142 is connected with the large-end longitudinal reinforcing beam 91 through an axial connecting bolt and nut 143.

[0066] In the embodiment, the small-end annular reinforcing ribs 72 are uniformly arranged on one side or uniformly staggered arranged on two sides of the small-end longitudinal reinforcing beam 71. The large-end annular reinforcing ribs 92 are uniformly arranged on one side or uniformly staggered arranged on two sides of the large-end longitudinal reinforcing beam 91.

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

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

[0069] In the embodiment, the door-shaped frame 81 comprises a circular-arch region 811 and two vertical-plate regions 812, and the end of the circular-arch region 811 is connected with the vertical-plate region 812 through a connecting plate 813 and a connecting bolt and nut 814.

[0070] In the embodiment, the small-end reinforcing modules 7 are arranged in a circular-arch direction on the circular-arch region 811 with a maximum circular-arch interval angle Xθmax:

[0071]

[0072] wherein XR is the inner radius of the small-end circular-arch reinforcing rib, i.e. the outer radius of the circular-arch region 811.

[0073] In the embodiment, the door-shaped supports 8 are arranged in an axial direction along the central axis of the shell 2 with a maximum axial clearance ΔXLmax of 2000 mm.

[0074] In the embodiment, the multiple large-end reinforcing modules 9 are arranged in a circular-arch direction along the large-end conical shell 5 with a maximum circular-arch interval angle Dθmax:

[0075]

[0076] wherein DR is the inner radius of the large-end circular-arch reinforcing rib.

[0077] In summary, the manhole 1 of the shell 2 has an inner diameter of Dmi = 800 mm, the small-end cylinder 3 has a nominal diameter of DN1600 mm, the large-end cylinder 6 has a nominal diameter of DN3300 mm, the axial length of the large-end cylinder 6 is 6000 mm, the axial length of the inclined cone is 1700 mm, and the calculated eccentric-cone cone angle is 45°. The outer radius of the door-shaped frame 81 is designed as XR = 840 mm, the thickness of the steel plate of the door-shaped frame 81 is 20 mm, the width G1 = 200 mm, and the maximum circular-arch interval angle Xθmax of the small-end reinforcing module 7 is calculated through a formula: In view of the fact that the shell 2 in the embodiment bears multiple relatively harsh design working conditions, for the sake of safety, a total of 9 small-end reinforcing modules 7 are evenly arranged in a circular-arch direction at an interval of 18° (less than 34°) along the circular-arch region 811 of the door-shaped frame 81 at the small-end conical shell 4, including 9 small-end longitudinal reinforcing beams 71 made of flat steel with a specification of 100x20, 18 small-end longitudinal gussets 73, 18 small-end longitudinal connecting plates 74, and 36 sets of small-end longitudinal connecting bolts and nuts 75. In addition, the present disclosure does not limit the thickness of the material of the small-end longitudinal reinforcing beam 71, the small-end longitudinal gusset 73, and the small-end longitudinal connecting plate 74, or the specification of the small-end longitudinal connecting bolt and nut 75, and adaptive design can be made according to needs. The large-end reinforcing module 9 is arranged at the large-end conical shell 5. The large-end reinforcing module 9 is arranged in a circular-arch direction at an interval of DR (the inner radius of the large-end circular-arch reinforcing rib) = 1000 mm, corresponding to a maximum circular-arch interval angle Dθmax: In view of the fact that the shell 2 in this embodiment is subjected to various harsh design conditions, for the sake of safety, at the large end 5 of the conical shell, a total of 9 large-end reinforcing modules 9 are uniformly arranged at intervals of 18° (less than 28.6°) along the radius DR (large-end circumferential reinforcing rib) = 1000 mm, including 9 large-end longitudinal reinforcing beams 91 made of flat steel with a specification of 100 x 20, 18 large-end longitudinal gussets 10, 18 large-end longitudinal connecting plates 11, and 36 sets of large-end longitudinal connecting bolts and nuts 12. In addition, the present disclosure does not limit the thickness of the materials used for the large-end longitudinal reinforcing beams 91, the large-end longitudinal gussets 10, and the large-end longitudinal connecting plates 11, or the specification of the large-end longitudinal connecting bolts and nuts 12, and adaptive design can be made as needed.

[0078] In this combined internal reinforcing structure, one door-shaped support 8 is arranged in each of the front and rear conical sections along the central axis of the shell 2 at intervals of 2000 mm, 1800 mm, 1800 mm, and 2000 mm, and 3 door-shaped supports 8 are arranged in the large-end cylindrical section, for a total of 5 door-shaped supports 8.

[0079] In this combined internal reinforcing structure, due to the fact that the pass-through size G = 1632 mm of the door-shaped frame cannot be loaded into the shell 2 via the manhole 1, the door-shaped frame 8 is arranged in a segmented structure, including one circular-arch section 811 and two vertical-plate sections 812, so that the pass-through size G = max(G1, G2, G3, G4) = max(200 mm, 204 mm, 328 mm, 251 mm) = 328 mm of the door-shaped frame 8 is less than the inner diameter of the manhole (1), meeting the requirement for installation via the manhole. In addition, in order to be able to send the small-end reinforcing module and the large-end reinforcing module into the shell 2 from the manhole, the small-end reinforcing module 7 needs to be designed such that XT = max(XT1, XT2) = max(578 mm, 159 mm) = 578 mm, and the large-end reinforcing module 9 needs to be designed such that DT = max(DT1, DT2) = max(691 mm, 149 mm) = 691 mm, so that both are less than the inner diameter of the manhole, meeting the installation requirement.

[0080] The above has described the embodiments of the present application, and the above description is exemplary and is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A combined internal reinforcement structure, which is arranged inside a shell, wherein the shell comprises a small end cylinder, a cone shell small end, a cone shell large end and a large end cylinder, characterized in that: The combined internal reinforcement structure includes: A plurality of small end reinforcement modules are arranged on the small end of the cone shell, and the small end reinforcement modules are arranged in the shell along the axial direction of the small end cylinder. The small end reinforcement modules include a small end longitudinal pad, a small end longitudinal reinforcement beam and a small end annular reinforcement rib. The small end longitudinal pad is arranged on the small end of the cone shell, and the small end longitudinal reinforcement 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 reinforcement beam is provided with a small end annular reinforcement rib, and the small end annular reinforcement ribs in adjacent small end reinforcement modules are connected by screw connection; A door-shaped support is provided on the shell, and the door-shaped support is supported on the bottom of the small-end reinforcement module.

2. The combined internal reinforcement structure according to claim 1, characterized in that: It also includes a plurality of large-end reinforcement modules, wherein the large-end reinforcement modules are arranged on the large end of the cone shell, and the large-end reinforcement modules include a large-end longitudinal pad, a large-end longitudinal reinforcement beam and a large-end annular reinforcement rib. The large-end longitudinal pad is arranged on the large end of the cone shell, and the large-end longitudinal reinforcement beam is connected to the large-end longitudinal pad via a large-end longitudinal connecting plate. At least one side of the large-end longitudinal reinforcement beam is provided with a large-end annular reinforcement rib, and the large-end annular reinforcement ribs in adjacent large-end reinforcement modules are connected by screwing. Axial support connects the large-end reinforcement module to the large-end cylinder.

3. The combined internal reinforcement structure according to claim 1, characterized in that: The door-shaped support includes a transverse plate connecting lug and a door-shaped frame. The side of the door-shaped frame is fixed to the shell by screwing the transverse plate connecting lug and the transverse plate connecting plate. The bottom of the door-shaped frame is connected to the shell by screwing the vertical plate connecting plate.

4. The combined internal reinforcement structure according to claim 2, characterized in that: The axial support includes an axial connecting plate and an axial connecting pad. The axial connecting pad is arranged on the large-end cylinder, and the large-end longitudinal reinforcing beam is connected to the axial connecting pad by screwing with the axial connecting plate.

5. The combined internal reinforcement structure according to claim 2, characterized in that: The small-end annular reinforcement ribs are evenly arranged on one side or evenly staggered on both sides of the small-end longitudinal reinforcement beam, and the large-end annular reinforcement ribs are evenly arranged on one side or evenly staggered on both sides of the large-end longitudinal reinforcement beam.

6. The combined internal reinforcement structure according to claim 1, characterized in that: The distance between the small end annular reinforcement ribs at the end of each side and the end of the small end longitudinal reinforcement beam is 100mm to 500mm, and the distance between adjacent small end annular reinforcement ribs is 500mm to 1000mm.

7. The combined internal reinforcement structure according to claim 2, characterized in that: The distance between the large-end annular reinforcement ribs at the end of each side and the end of the large-end longitudinal reinforcement beam is 100mm to 500mm, and the distance between adjacent large-end annular reinforcement ribs is 500mm to 1000mm.

8. The combined internal reinforcement structure according to claim 1, characterized in that: The portal frame includes a round arch area and two vertical plate areas.

9. The combined internal reinforcement structure according to claim 1, characterized in that: The small end reinforcement modules are arranged in an annular spacing on the arch area, and the maximum annular spacing angle Xθmax is: Among them, XR is the inner radius of the small-end annular reinforcement rib, that is, the outer radius of the arch area.

10. The combined internal reinforcement structure according to claim 2, characterized in that: The plurality of large end reinforcement modules are arranged circumferentially and spaced apart along the large end of the cone shell, with a maximum circumferential spacing angle Dθmax: Wherein, DR is the inner radius of the large-end annular reinforcement rib.

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