A flange structure
Patent Information
- Application Number
- CN202611250841.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-18
- Publication Date
- 2026-10-13
AI Technical Summary
由于预应力孔洞的存在削弱了混凝土的连续截面，加之钢法兰盘刚度突变对下部混凝土产生的局部挤压效应，导致相邻孔洞之间的混凝土柱状区域承受高度集中的压应力，而孔洞边缘附近则可能出现应力卸荷甚至产生拉应力，长期使用后容易导致混凝土局部开裂，不仅影响结构的耐久性和密封性
本发明公开的一种法兰结构，通过在第二钢法兰的内边缘上沿周向均匀间隔安装弧形加强板，加强了与第二混凝土筒体之间连接处的强度，为连接部分提供了额外的刚性约束，提高装置在长期使用过程中的密封性和寿命。本发明通过采用内外两层通孔连接，并且内层通孔的连接件同时贯穿第二混凝土筒体，进一步增加了第二混凝土筒体的抗变形能力，避免了长期使用后导致的混凝土局部开裂的问题。
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Figure CN122899953A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of flange connectors, and specifically relates to a flange structure. Background Technology
[0002] Flange structures are crucial components in civil and marine engineering, used to connect towers or pipeline systems, particularly in wind turbine towers, bridge piers, and large pressure pipelines. A common connection method combines a steel flange with a concrete cylinder, using anchors or prestressing tendon holes on the steel flange to integrate it with the precast or cast-in-place concrete cylinder. However, the presence of prestressing holes weakens the continuous cross-section of the concrete. Furthermore, the abrupt change in the stiffness of the steel flange creates a localized compression effect on the underlying concrete, resulting in highly concentrated compressive stress in the columnar region of the concrete between adjacent holes. Meanwhile, stress relief or even tensile stress may occur near the edges of the holes. Over time, this can easily lead to localized cracking of the concrete, affecting both the structure's durability and sealing performance. Summary of the Invention
[0003] In view of this, the purpose of the present invention is to provide a flange structure that can provide rigid constraints for the connection part, thereby improving the sealing performance and service life of the device during long-term use.
[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a flange structure comprising a first concrete cylinder, a first steel flange, a second steel flange, and a second concrete cylinder. The first and second concrete cylinders are coaxially fixedly connected to the first and second steel flanges, respectively. The first and second steel flanges are matingly connected. Two sets of circumferentially spaced through holes are provided on the first and second steel flanges, respectively, arranged along a concentric first and second circumference of the flange. The diameter of the first circumference is smaller than the diameter of the second circumference, such that the first set of through holes is located circumferentially inside the second set of through holes. The first concrete cylinder... The end face is located between two sets of through holes. A third set of through holes corresponding to the first set of through holes is opened on the end face of the first concrete cylinder. A first connector is installed in part of the first through hole, and a second connector is installed in part of the second through hole. Arc-shaped reinforcing plates are evenly spaced along the circumference on the inner edge of the second steel flange. The outer arc surface of the arc-shaped reinforcing plate corresponds to the inner wall surface of the second concrete cylinder. Multiple sets of collars are evenly spaced along the axial direction on the inner wall surface of the second concrete cylinder. The multiple sets of collars form a first channel for inserting the arc-shaped reinforcing plate. The arc-shaped reinforcing plate is fastened to the inner wall surface of the second concrete cylinder by the collars.
[0005] Furthermore, the second concrete cylinder is pre-embedded with a first ring reinforcement, a second ring reinforcement, and a third ring reinforcement in sequence from the inside to the outside along the radial direction. A slot is opened on the end face of the second concrete cylinder, through which the first ring reinforcement, the second ring reinforcement, and the third ring reinforcement pass. A through hole is opened on the second concrete cylinder for the collar to pass through. The two ends of the collar pass through the through hole into the slot and are fixedly connected to the first ring reinforcement, the second ring reinforcement, and the third ring reinforcement. A clamping component is installed in the slot to drive the collar to press the arc-shaped reinforcing plate.
[0006] Furthermore, the clamping component includes a cam, one end of which is fixed with a rotating ring. The cam is rotatably mounted at the bottom of the slot via the rotating ring. A return coil spring is installed between the cam and the slot. A threaded hole is opened in the center of the cam, which corresponds to the third through hole. A hollow screw is threaded into the threaded hole. The two ends of the hollow screw pass through the first through hole and the third through hole, respectively. The two ends of the hollow screw are connected to the first steel flange and the second concrete cylinder, respectively, by fasteners.
[0007] Furthermore, the hollow screw has a grouting port at at least one end, and a grout outlet is provided on the outer wall of the hollow screw. The grout outlet is located inside the groove, and a plug is provided inside the grouting port.
[0008] Furthermore, a second channel is formed radially between the second and third ring ribs, and an arc-shaped gasket is installed in the second channel. The arc-shaped gasket is installed inside the groove, and its inner and outer sides contact the second and third ring ribs, respectively.
[0009] Furthermore, a sealing bladder is provided between the first steel flange and the second steel flange, the sealing bladder is filled with liquid, and annular grooves for installing the sealing bladder are provided on the end faces of the first steel flange and the second steel flange.
[0010] Furthermore, the sealing bladder is connected to a conduit via a branch pipe. Radial grooves for installing the branch pipe are provided on the end faces of the first and second steel flanges. The branch pipe extends radially along the first steel flange. The conduit passes through the inner side of the second through hole. Limit plates are fixed at both ends of the conduit. Hydraulic bladders are installed on the limit plates. Holes communicating with the hydraulic bladders are provided on the pipe wall of the conduit. The hydraulic bladders at both ends of the conduit are in contact with the first and second steel flanges, respectively.
[0011] The beneficial effects of this invention are as follows: This invention discloses a flange structure that strengthens the connection between the second steel flange and the second concrete cylinder by uniformly spaced arc-shaped reinforcing plates along the circumferential direction on the inner edge of the second steel flange. This provides additional rigid constraints to the connection, improving the sealing performance and lifespan of the device during long-term use. Furthermore, by employing a two-layer through-hole connection, with the inner through-hole connector penetrating the second concrete cylinder, this invention further increases the deformation resistance of the second concrete cylinder, preventing localized cracking of the concrete after prolonged use. Attached Figure Description
[0012] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first steel flange; Figure 3 This is a schematic diagram of the second steel flange. Figure 4 This is a schematic diagram of the structure of the second concrete cylinder; Figure 5 This is a schematic diagram of the arrangement of the third ring reinforcement; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a cross-sectional view of the present invention; Figure 8 for Figure 7 Enlarged view of point B in the middle.
[0013] The following are the markings in the attached diagram: 1. First concrete cylinder; 2. First steel flange; 3. Second steel flange; 4. Second concrete cylinder; 5. First group of through holes; 6. Second group of through holes; 7. Third group of through holes; 8. Arc-shaped reinforcing plate; 9. Collar; 10. First ring reinforcement; 11. Second ring reinforcement; 12. Third ring reinforcement; 13. Groove; 14. Through hole; 15. Cam; 16. Rotating ring; 17. Return coil spring; 18. Hollow screw; 19. Fastener; 20. Grouting port; 21. Grouting outlet; 22. Plug; 23. Arc-shaped gasket; 24. Sealing bladder; 25. Ring groove; 26. Branch pipe; 27. Guide pipe; 28. Radial groove; 29. Limiting plate; 30. Liquid bladder; 31. Hole. Detailed Implementation
[0014] like Figures 1-8 As shown, the flange structure disclosed in this invention includes a first concrete cylinder 1, a first steel flange 2, a second steel flange 3, and a second concrete cylinder 4. Both the first concrete cylinder 1 and the second concrete cylinder 4 are cylindrical structures, and are coaxially fixedly connected to the first steel flange 2 and the second steel flange 3, respectively. After overall connection, all four components are coaxial. It is understood that in the application scenario of this invention, the second concrete cylinder 4 mainly bears pressure, while the first concrete cylinder 1 bears less pressure; therefore, the structure of the first concrete cylinder 1 will not be described in detail.
[0015] Similar to conventional flange connections, the first steel flange 2 and the second steel flange 3 of this invention are connected in a mating manner. The first steel flange 2 and the second steel flange 3 are provided with two sets of through holes distributed circumferentially. The two sets of through holes are arranged along the first circumference and the second circumference, which are concentric with the flange, respectively. The diameter of the first circumference is smaller than the diameter of the second circumference, so that the first set of through holes 5 is located on the inner side of the second set of through holes 6. The end face of the first concrete cylinder 1 is located between the two sets of through holes. Meanwhile, the first concrete cylinder 1 of the present invention has a third set of through holes 7 corresponding to the first set of through holes 5 on its end face. A first connector is installed in part of the first through holes, and a second connector is installed in part of the second through holes. The first set of through holes 5 in the inner ring of the present invention and the first connector installed inside them directly penetrate the third set of through holes 7 on the end face of the first concrete cylinder 1, while the second connector in the second set of through holes 6 in the outer ring only connects two steel flanges. This method allows the inner ring connector to bear the main axial tensile force and bending moment, while the outer ring connector provides auxiliary constraint and sealing pressure, thereby dispersing the huge compressive stress originally concentrated at the root of the flange to the inner and outer annular areas of the concrete cylinder, reducing the overall pressure.
[0016] Furthermore, the second steel flange 3 of the present invention has arc-shaped reinforcing plates 8 evenly spaced along its inner edge in the circumferential direction. The outer arc surface of the arc-shaped reinforcing plates 8 corresponds to the inner wall surface of the second concrete cylinder 4. Multiple sets of collars 9 are evenly spaced along the axial direction on the inner wall surface of the second concrete cylinder 4. The multiple sets of collars 9 form a first channel for inserting the arc-shaped reinforcing plates 8. The arc-shaped reinforcing plates 8 are fastened to the inner wall surface of the second concrete cylinder 4 by the collars 9. The arc-shaped reinforcing plates 8 evenly spaced along the inner edge of the second steel flange 3 of the present invention, together with the first channel formed by the multiple sets of collars 9 along the axial direction on the inner wall surface of the second concrete cylinder 4, achieve a tight insertion and fastening between the arc-shaped reinforcing plates 8 and the inner wall of the cylinder. When the outer arc surface of the arc-shaped reinforcing plates 8 is in contact with the inner wall surface of the second concrete cylinder 4, the collars 9 not only provide radial restraint, but also convert the transverse shear force borne by the flange into frictional and shear forces between the collars 9 and the embedded parts, thereby significantly enhancing the bending stiffness and fatigue resistance at the connection between the second steel flange 3 and the second concrete cylinder 4. This structure can effectively suppress localized cracking of concrete and warping deformation of flanges, greatly improving the durability and sealing effect of the structure.
[0017] In this embodiment, the second concrete cylinder 4 is pre-embedded radially from the inside to the outside with a first ring reinforcement 10, a second ring reinforcement 11, and a third ring reinforcement 12. A slot 13 is opened on the end face of the second concrete cylinder 4, through which the first ring reinforcement 10, the second ring reinforcement 11, and the third ring reinforcement 12 pass. A through hole 14 is opened on the second concrete cylinder 4 for the collar 9 to pass through. The two ends of the collar 9 pass through the through hole 14 into the slot 13 and are fixedly connected to the first ring reinforcement 10, the second ring reinforcement 11, and the third ring reinforcement 12. A clamping component is installed in the slot 13 to drive the collar 9 to press the arc-shaped reinforcing plate 8. The three ring reinforcements of different diameters form a multi-layer nested annular skeleton system. They not only improve the compressive strength and crack resistance of the cylinder end, but more importantly, they provide multiple radial anchoring points for the collar 9. The clamping component installed in the slot 13 can actively drive the collar 9 to press the arc-shaped reinforcing plate 8, which facilitates the subsequent fixing of the arc-shaped reinforcing plate 8.
[0018] In this embodiment, the clamping component includes a cam 15, one end of which is fixed with a rotating ring 16. The cam 15 is rotatably mounted at the bottom of the slot 13 via the rotating ring 16. A return spring 17 is installed between the cam 15 and the slot 13. A threaded hole is opened at the center of the cam 15, corresponding to the third through hole. A hollow screw 18 is threadedly connected to the threaded hole. The two ends of the hollow screw 18 pass through the first through hole and the third through hole, respectively. The two ends of the hollow screw 18 are connected to the first steel flange 2 and the second concrete cylinder 4, respectively, via fasteners 19. In specific operation, the operator inserts the hollow screw 18 into the threaded hole at the center of the cam 15. The linear movement of the hollow screw 18 causes the cam 15 to rotate, which in turn drives the cam 15 to deflect against the elastic force of the return spring 17. During the deflection process, the profile curve of cam 15 gradually squeezes the second ring rib 11 and the third ring rib 12 and drives the collar 9 to move, thereby converting the rotational motion into a linear clamping force in the radial direction of the cylinder, pushing the collar 9 to firmly press the arc-shaped reinforcing plate 8 against the inner wall of the second concrete cylinder 4, providing a prestress, which facilitates the subsequent fixing of the arc-shaped reinforcing plate 8 to the second concrete cylinder 4.
[0019] In this embodiment, at least one end of the hollow screw 18 is formed with a grouting port 20, and the outer wall of the hollow screw 18 is provided with a grout outlet 21. The grout outlet 21 is located inside the groove 13. A plug 22 is provided inside the grouting port 20. After filling, the groove 13 no longer has a cavity, which avoids stress concentration and local vibration fatigue, and greatly improves the durability of the structure under dynamic load.
[0020] In this embodiment, a second channel is formed radially between the second ring rib 11 and the third ring rib 12. An arc-shaped gasket 23 is installed in the second channel. The arc-shaped gasket 23 is installed inside the slot 13. The inner and outer sides of the arc-shaped gasket 23 contact the second ring rib 11 and the third ring rib 12, respectively. During the rotation of the cam 15, the arc-shaped gasket 23 can play a supporting role, making the deformation of the second ring rib 11 and the third ring rib 12 controllable, and the displacement process of the collar 9 more stable.
[0021] In this embodiment, a sealing bladder 24 is provided between the first steel flange 2 and the second steel flange 3. The sealing bladder 24 is filled with liquid. Annular grooves 25 for installing the sealing bladder 24 are formed on the end faces of the first steel flange 2 and the second steel flange 3. The sealing bladder 24 is connected to a conduit 27 via a branch pipe 26. Radial grooves 28 for installing the branch pipe 26 are formed on the end faces of the first steel flange 2 and the branch pipe 26 extends radially along the first steel flange 2. The conduit 27 passes through the inner side of the second through hole. Limiting plates 29 are fixed at both ends of the conduit 27, and hydraulic bladders are installed on the limiting plates 29. Holes 31 communicating with the hydraulic bladders are formed on the wall of the conduit 27. The hydraulic bladders at both ends of the conduit 27 contact the first steel flange 2 and the second steel flange 3, respectively. When there is a certain axial gap between the first steel flange 2 and the second steel flange 3, their end faces can compress the hydraulic bladder. The liquid inside the hydraulic bladder can enter the sealing bladder 24 through the branch pipe 26, causing the sealing bladder 24 to expand and improving the sealing effect, thus providing a temporary seal.
Claims
1. A flange structure, characterized in that: The system includes a first concrete cylinder, a first steel flange, a second steel flange, and a second concrete cylinder. The first and second concrete cylinders are coaxially and fixedly connected to the first and second steel flanges, respectively. The first and second steel flanges are matingly connected. Two sets of circumferentially spaced through holes are provided on the first and second steel flanges, respectively, arranged along a concentric first and second circumference of the flange. The diameter of the first circumference is smaller than the diameter of the second circumference, such that the first set of through holes is located circumferentially inside the second set of through holes. The end face of the first concrete cylinder is located between the two sets of through holes. Between the holes, a third set of through holes corresponding to the first set of through holes is opened on the end face of the first concrete cylinder. A first connector is installed in part of the first through holes, and a second connector is installed in part of the second through holes. Arc-shaped reinforcing plates are evenly spaced along the circumference on the inner edge of the second steel flange. The outer arc surface of the arc-shaped reinforcing plate corresponds to the inner wall surface of the second concrete cylinder. Multiple sets of collars are evenly spaced along the axial direction on the inner wall surface of the second concrete cylinder. The multiple sets of collars form a first channel for inserting the arc-shaped reinforcing plate. The arc-shaped reinforcing plate is fastened to the inner wall surface of the second concrete cylinder by the collars.
2. The flange structure according to claim 1, characterized in that: The second concrete cylinder has a first ring reinforcement, a second ring reinforcement, and a third ring reinforcement embedded radially from the inside to the outside. A slot is opened on the end face of the second concrete cylinder, through which the first ring reinforcement, the second ring reinforcement, and the third ring reinforcement pass. A through hole is opened on the second concrete cylinder for the collar to pass through. The two ends of the collar pass through the through hole into the slot and are fixedly connected to the first ring reinforcement, the second ring reinforcement, and the third ring reinforcement. A clamping component is installed in the slot to drive the collar to press the arc-shaped reinforcing plate.
3. A flange structure according to claim 2, characterized in that: The clamping component includes a cam, one end of which is fixed with a rotating ring. The cam is rotatably mounted at the bottom of the slot via the rotating ring. A return coil spring is installed between the cam and the slot. A threaded hole is opened in the center of the cam, which corresponds to the third through hole. A hollow screw is threaded into the threaded hole. The two ends of the hollow screw pass through the first through hole and the third through hole, respectively. The two ends of the hollow screw are connected to the first steel flange and the second concrete cylinder, respectively, by fasteners.
4. A flange structure according to claim 3, characterized in that: The hollow screw has a grouting port at at least one end, and a grout outlet is provided on the outer wall of the hollow screw. The grout outlet is located inside the groove, and a plug is provided inside the grouting port.
5. A flange structure according to claim 4, characterized in that: A second channel is formed radially between the second and third ring ribs. An arc-shaped gasket is installed in the second channel. The arc-shaped gasket is installed inside the groove, and its inner and outer sides contact the second and third ring ribs, respectively.
6. A flange structure according to any one of claims 1-5, characterized in that: A sealing bladder is provided between the first steel flange and the second steel flange. The sealing bladder is filled with liquid. Annular grooves for installing the sealing bladder are provided on the end faces of the first and second steel flanges.
7. A flange structure according to claim 6, characterized in that: The sealing bladder is connected to a conduit via a branch pipe. Radial grooves for installing the branch pipe are provided on the end faces of the first and second steel flanges. The branch pipe extends radially along the first steel flange. The conduit passes through the inner side of the second through hole. Limit plates are fixed at both ends of the conduit. Hydraulic bladders are installed on the limit plates. Holes communicating with the hydraulic bladders are provided on the pipe wall of the conduit. The hydraulic bladders at both ends of the conduit are in contact with the first and second steel flanges, respectively.