Corrugated steel pipe connecting structure

Abstract

This utility model discloses a corrugated steel pipe connection structure. Key technical features include fixing frames fixed to the outer periphery of both ends of the corrugated steel pipe. Each fixing frame has flanges connected by bolts and nuts. It also includes an annular water-stopping element with an outer diameter adapted to the fixing frame. The water-stopping element extends towards the pipe wall on both sides, forming protrusions that match the pipe wall contour. A clamping structure is provided on the water-stopping element. A reinforcement device is provided on the flange near the bolt and nut connection. This utility model, through the water-stopping element, ensures that when the corrugated steel pipe is misaligned, the water-stopping element can tightly adhere to the pipe wall and compensate for the misalignment, effectively preventing leakage. The clamping structure can clamp and fix the fixing frame. The reinforcement device effectively limits the deflection between the fixing frame and the flange, as well as the flange structure itself, making the connection structure less prone to deflection and resulting in higher overall stability.

Description

Technical Field

[0001] This utility model relates to the field of flange connection technology, and more specifically to a corrugated steel pipe connection structure. Background Technology

[0002] Currently, corrugated steel pipes are metal pipes with a corrugated structure. Due to their unique structural design, they are widely used in various engineering fields, especially suitable for applications requiring high pipe strength, sealing performance, ease of construction, and corrosion resistance. The corrugated structure significantly improves the pipe's pressure resistance, making it less prone to deformation even under high-pressure environments. Corrugated steel pipes are typically connected using sleeves or flanges, simplifying installation and allowing for quick connection.

[0003] However, the existing technologies mentioned above still have some drawbacks. In areas with complex geology (such as soft soil foundations) or long-term loads (such as under roads), foundation settlement or external loads can easily cause shear and axial displacement at the pipe joints. Traditional flanges have limited fixing capacity and are difficult to resist settlement stress, which may lead to misalignment, insufficient sealing pressure, and leakage. Ordinary static seals (such as rubber gaskets) cannot adapt to the dynamic deformation of the pipe. When the joint gap increases, the sealing performance weakens and leakage is likely to occur, which seriously affects the service life of the pipe and the safety of the project. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a corrugated steel pipe connection structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a fixing frame fixed to the outer periphery of both ends of a corrugated steel pipe, the fixing frame having flanges connected by bolts and nuts, and also includes an annular water-stopping component. The outer diameter of the water-stopping component is adapted to the fixing frame, and its two sides extend towards the pipe wall to form protrusions matching the pipe wall contour. The water-stopping component has a clamping structure; a reinforcing device is provided on the flange near the bolt and nut connection.

[0006] The present invention is further configured such that: the reinforcing device includes a reinforcing gasket disposed at the bolt connection and a reinforcing block assembly for limiting the rotation of the flange relative to the fixed frame.

[0007] The present invention is further configured such that: the reinforcing gasket has a continuously bent C-shaped structure, and the bent portions at both ends are provided with through holes that are coaxially fitted with the bolts; one side of the reinforcing gasket abuts against the side end face of the opposite flange near the connection.

[0008] The present invention is further configured such that: the reinforcing gasket has an opening on the side of the flange that abuts against the opposite side.

[0009] The present invention is further configured such that: the reinforcing block assembly includes several locking blocks, the fixing frame is provided with a sliding groove adapted to the contour of the locking blocks, and the flange is provided with a slot adapted to the contour of the locking blocks at the position corresponding to the sliding groove.

[0010] The present invention is further configured such that the water-stopping component is made of a highly elastic material.

[0011] The present invention is further configured such that: the clamping structure includes a plurality of threaded holes provided on the waterstop, screws that mate with the threaded holes, and a pressure plate; the pressure plate is positioned corresponding to the threaded holes, and its width is greater than the width of the waterstop.

[0012] In summary, this utility model has the following beneficial effects: by setting the water-stopping component, when the corrugated steel pipe is misaligned, the water-stopping component can fit tightly against the pipe wall and compensate for the misalignment, effectively preventing leakage; by setting the clamping structure, the fixing frame can be clamped and fixed, thereby limiting the misalignment between the fixing frames; by setting the reinforcement device, the deflection between the fixing frame and the flange and the flange structure itself can be effectively limited, enhancing the torsional resistance, making the connection structure less prone to deflection, and the overall structure has higher stability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0014] Figure 2 This is an exploded view of this embodiment;

[0015] Figure 3 This is a cross-sectional view of this embodiment;

[0016] Reference numerals: 1. Fixing bracket; 11. Slide groove; 2. Flange; 21. Slot; 3. Bolt; 31. Nut; 4. Water stop; 41. Protrusion; 42. Clamping structure; 421. Pressure plate; 422. Threaded hole; 423. Screw; 5. Reinforcing device; 51. Reinforcing gasket; 511. Through hole; 512. Opening; 52. Reinforcing block assembly; 521. Locking block. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] This embodiment discloses a corrugated steel pipe connection structure, such as Figures 1 to 3As shown, the device includes a fixing frame 1 fixed to the outer periphery of both ends of a corrugated steel pipe. The fixing frame 1 has flanges 2 connected by bolts 3 and nuts 31, which provide basic tightening force for the flange connection. It also includes an annular water-stopping element 4, whose outer diameter is adapted to the fixing frame 1. Its two sides extend towards the pipe wall, forming protrusions 41 that match the pipe wall contour, ensuring the water-stopping element 4 fits snugly against the ends of the corrugated pipe and prevents leakage. The water-stopping element 4 has a clamping structure 42 that presses the water-stopping element 4 tightly against the corrugated steel pipe, achieving a good water-stopping effect. A reinforcing device 5 is provided near the connection point of the bolts 3 and nuts 31 on the flanges 2, which enhances the mechanical strength of the connection point.

[0019] To further improve the design, the reinforcement device 5 includes a reinforcing gasket 51 disposed at the bolt 3 connection and a reinforcing block assembly 52 for restricting the rotation of the flange 2 relative to the fixing frame 1. The reinforcing gasket 51 enhances the rigidity of the bolt 3 connection, strengthening the bolt 3's resistance to torsion, deformation, and torsion. The reinforcing block assembly 52 achieves mechanical interlocking, restricting the relative rotation between the flange 2 and the fixing frame 1, and preventing flange torsion caused by unilateral flange rotation.

[0020] Further improvements include a continuously bent C-shaped structure for the reinforcing gasket 51, with through holes 511 at both bent ends that mate coaxially with the bolts 3. One side of the reinforcing gasket 51 abuts against the opposite flange 2 near the connection point. When the bolts 3 are tightened, the reinforcing gasket 51 is pressed firmly against the inside of the flange 2, forming a rigid structure. This structure provides auxiliary support when bending occurs at the pipe connection, reducing bending. Simultaneously, the friction of the contact surfaces effectively restricts relative rotation and pipe misalignment, thereby enhancing the overall resistance to torsion and bending deformation. Furthermore, the reinforcing gasket 51 physically limits the final compression distance between the connecting flanges 2, preventing over-tightening of the bolts 3 and preventing the water-stopping component 4 from failing due to excessive compression.

[0021] To further improve the design, the reinforcing gasket 51 has an opening 512 on the side abutting against the opposite flange 2. The opening 512 is designed to facilitate the "clamping" of the gasket onto the bolt 3 from the side, making installation more convenient.

[0022] Further improvements include the reinforcement block assembly 52 comprising several locking blocks 521, a mounting bracket 1 having a groove 11 adapted to the contour of the locking blocks 521, and a flange 2 having a slot 21 adapted to the contour of the locking blocks 521 at the position corresponding to the groove 11. The cooperation between the locking blocks 521 and the groove 11 / slot 21 allows the locking blocks 521 to bear the shear force between the flange 2 and the mounting bracket 1, rather than relying entirely on the shear resistance of the bolts 3, thus improving overall rigidity and deformation resistance.

[0023] To further improve the design, the water-stopping component 4 is made of a highly elastic material. In this embodiment, the highly elastic material is preferably EVA. When the pipeline expands and contracts due to heat or the foundation settles, the elastic material can deform while still maintaining contact with the pipe wall, thus maintaining the seal and avoiding the seal failure that may occur due to deformation of rigid materials.

[0024] Further improvements include a clamping structure 42 comprising several threaded holes 422 on the waterstop 4, screws 423 that mate with the threaded holes 422, and a pressure plate 421. The clamping structure 42 can apply uniform clamping force at multiple points through the several threaded holes 422, the screws 423 that mate with the threaded holes 422, and the pressure plate 421, avoiding local over-compression or under-compression. The pressure plate 421 corresponds to the position of the threaded holes 422, and its width is greater than the width of the waterstop 4. When the screws 423 are tightened, the pressure plate 421, which is wider than the width of the waterstop 4, will contact and clamp the fixing brackets 1 on both sides, which can restrict the movement of the fixing brackets 1 relative to the waterstop 4. While clamping the fixing brackets 1, the pressure plate 421 will also pull up the waterstop 4, making the waterstop 4 contact the end of the corrugated steel pipe more tightly and obtaining a good sealing effect.

[0025] Working principle of this utility model

[0026] During installation, firstly, fix (e.g., weld) the first and second fixing brackets 1 to the ends of the two corrugated steel pipes respectively. Then, put the water-stopping component 4 on the pipe end and initially connect it to the corrugated steel pipe. Align the groove 21 of the flange with the slide groove 11, and insert the reinforcing block assembly 52 into the fixing bracket 1 through the slide groove 11 so that the reinforcing block assembly 52 and the groove 21 are properly fitted. Then, insert the bolt 3 with the reinforcing gasket 51 fitted into the flange 2, and tighten the nut 31 until the nut 31 or the bolt 3 head is tightly fitted with both ends of the reinforcing gasket 51. Finally, use the screw 423 to install the pressure plate 421 into the threaded hole 422 so that the pressure plate 421 presses the fixing bracket 1. The installation is complete.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrugated steel pipe connection structure, comprising a fixing frame (1) respectively fixed to the outer periphery of both ends of a corrugated steel pipe, wherein the fixing frame (1) is provided with a flange (2), and the flange (2) is connected by bolts (3) and nuts (31), characterized in that: It also includes an annular waterstop (4), the outer diameter of which is adapted to the fixing frame (1), and its two sides extend toward the pipe wall to form a protrusion (41) that matches the pipe wall profile. The waterstop (4) is provided with a clamping structure (42); the flange (2) is provided with a reinforcing device (5) near the connection of the bolt (3) and nut (31).

2. The corrugated steel pipe connection structure according to claim 1, characterized in that: The reinforcement device (5) includes a reinforcing gasket (51) disposed at the bolt (3) connection and a reinforcing block assembly (52) for limiting the rotation of the flange (2) relative to the fixing frame (1).

3. The corrugated steel pipe connection structure according to claim 2, characterized in that: The reinforcing gasket (51) has a continuously bent C-shaped structure, and the bent parts at both ends are provided with through holes (511) that are coaxially matched with the bolts (3); one side of the reinforcing gasket (51) abuts against the side end face of the flange (2) near the connection.

4. The corrugated steel pipe connection structure according to claim 3, characterized in that: The reinforcing gasket (51) has an opening (512) on the side that abuts against the opposite flange (2).

5. The corrugated steel pipe connection structure according to claim 2, characterized in that: The reinforcing block assembly (52) includes several locking blocks (521), and the fixing frame (1) is provided with a sliding groove (11) that is adapted to the contour of the locking block (521). The flange (2) is provided with a slot (21) that is adapted to the contour of the locking block (521) at the position corresponding to the sliding groove (11).

6. The corrugated steel pipe connection structure according to claim 1, characterized in that: The water-stopping component (4) is made of a highly elastic material.

7. The corrugated steel pipe connection structure according to claim 1, characterized in that: The clamping structure (42) includes a plurality of threaded holes (422) provided on the waterstop (4), screws (423) that cooperate with the threaded holes (422), and a pressure plate (421); the pressure plate (421) is positioned corresponding to the threaded holes (422), and its width is greater than the width of the waterstop (4).

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