A retractable device installed inside a well for a siphon pipe used for crossing a river.

Abstract

This utility model relates to the field of municipal drainage technology, and in particular to a retractable device installed inside a manhole for a river-crossing inverted siphon. The retractable device includes: a manhole wall, a pipe body, a first flange, a sealing expansion assembly, and a maintenance expansion assembly. The middle portion of the pipe body passes through the manhole wall, and one end is fixedly connected to the first flange. The sealing expansion assembly includes a corrugated rubber sealing sleeve, a mounting ring, a retaining ring, and a second flange; the mounting ring is fixed to both ends of the sealing sleeve. The maintenance expansion assembly includes a telescopic outer rod, a telescopic inner rod, a telescopic outer plate, a telescopic inner plate, a spring, a rotating sleeve, and a torsion spring. The telescopic inner rod is slidably connected to the telescopic outer rod, the telescopic inner plate is slidably connected to the telescopic outer plate and fixed to the telescopic inner rod, the rotating sleeve is engaged with bolts, and the torsion spring prevents bolt loosening. The retractable device for a river-crossing inverted siphon provided by this utility model has the advantages of reliable sealing, strong resistance to deformation, and stable connection.

Description

Technical Field

[0001] This utility model relates to the field of municipal drainage technology, and in particular to a retractable device installed inside a well for a river-crossing inverted siphon. Background Technology

[0002] When pipelines need to cross rivers, valleys, or other low-lying areas, overhead or bridge construction is costly and may affect shipping or the landscape. Inverted siphons, which pass under obstacles in a concave, zigzag pattern, are an ideal choice for underground crossings and are commonly used in practical engineering projects. They typically consist of an inlet well, a pipeline, and an outlet well.

[0003] In current engineering construction, pipelines and wells are typically connected using rigid connections (such as concrete encapsulation or flange bolt fixing). While this ensures short-term sealing, it presents several problems and can easily lead to damage. Firstly, there is the influence of dynamic loads. Fluctuations in river water levels (such as during flood and dry seasons, and sudden changes in water levels during the rainy season), dynamic loads from ship traffic, and riverbed scouring and settlement can all cause uneven stress on the pipeline, resulting in axial displacement or flexural deformation. Simultaneously, seasonal temperature changes cause thermal expansion and contraction of the pipeline, and uneven settlement of the riverbed foundation can further exacerbate shear stress at the interface. Rigid connections at the pipe-well interface cannot effectively absorb deformation, leading to stress concentration, which can easily cause flange bolts to loosen, concrete to crack, or even pipeline to detach, resulting in leakage or structural failure.

[0004] Therefore, it is necessary to provide a new retractable device installed inside the well for a river-crossing inverted siphon to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a retractable device installed inside a well for a river-crossing inverted siphon.

[0006] The expandable device for a siphon pipe for crossing a river, provided by this utility model, includes: a well wall, through which a pipe body passes, and a first flange is fixedly connected to one end of the pipe body; a sealing expansion assembly is installed between the first flange and the well wall, the sealing expansion assembly being used to seal the space between the first flange and the well wall; a maintenance expansion assembly is installed on the outside of the sealing expansion assembly, the maintenance expansion assembly being used to protect the sealing expansion assembly and the pipe body between the first flange and the well wall.

[0007] Preferably, the sealing expansion assembly includes: a sealing sleeve, both ends of which are fixedly connected to mounting rings, each of the two mounting rings having a retaining ring fixedly connected to one side facing each other, and a second flange being snapped into one side of each of the two mounting rings facing each other.

[0008] Preferably, of the two second flanges, one second flange is fixedly connected to the well wall by expansion bolts, and the other second flange is fixedly connected to the first flange by stainless steel bolts.

[0009] Preferably, the maintenance telescopic assembly includes: four telescopic outer rods, which are equidistantly arranged between the two second flanges, and one end of each telescopic outer rod is slidably connected to a telescopic inner rod.

[0010] Preferably, four telescopic outer plates are equidistantly arranged on the outer side of the sealing sleeve, and the two ends of the telescopic outer plates are fixedly connected to the telescopic outer rods respectively; telescopic inner plates are slidably connected inside the telescopic outer plates, and the two ends of the telescopic inner plates are fixedly connected to the telescopic inner rods respectively.

[0011] Preferably, both sides of the telescopic outer rod are provided with sliding grooves, the end of the telescopic inner plate slides in the sliding grooves, and a spring is fixedly connected to the inner wall of the telescopic outer rod, with one end of the spring fixedly connected to one end of the telescopic inner rod.

[0012] Preferably, a rotating sleeve is rotatably connected to the opposite ends of the telescopic outer rod and the telescopic inner rod, and the rotating sleeve is engaged with the expansion bolt and the stainless steel bolt; a torsion spring is fixedly connected inside the opposite ends of the telescopic outer rod and the telescopic inner rod, and the outer end of the torsion spring is fixedly connected to the rotating sleeve.

[0013] Compared with related technologies, the retractable device installed inside the well for a river-crossing inverted siphon provided by this utility model has the following advantages:

[0014] I. Improve sealing reliability and effectively prevent leakage risk

[0015] This invention utilizes a corrugated rubber sealing sleeve to construct the core sealing structure. The mounting rings at both ends of the sealing sleeve are stably engaged with the second flange via retaining rings. When the second flange is fixed to the well wall (via expansion bolts) and the first flange of the pipe body (via stainless steel bolts), it exerts a squeezing and clamping force on the mounting rings, ensuring a tight fit between the sealing sleeve and the connection between the well wall and the pipe. Simultaneously, the corrugated design provides the sealing sleeve with excellent deformation adaptability. Even if the pipe slides relative to the well wall, the sealing sleeve can maintain a sealed state through expansion and contraction. This completely solves the leakage problems caused by flange loosening and concrete cracking due to deformation in traditional rigid connections, significantly improving the sealing reliability at the pipe well interface.

[0016] II. Enhanced resistance to deformation, adapting to complex working conditions and loads.

[0017] This invention addresses complex operating conditions such as fluctuating river levels, dynamic loads from ship traffic, riverbed scouring and settlement, and temperature changes, demonstrating superior resistance to deformation and deformation absorption capabilities. On one hand, the pipe body and the manhole wall can slide relative to each other, and the expansion and contraction characteristics of the corrugated sealing sleeve effectively absorb axial displacement of the pipe. On the other hand, the outer and inner telescopic rods in the expansion and contraction assembly slide synchronously with the pipe displacement, and the internal spring buffers deformation stress through expansion and contraction. The sliding cooperation between the inner and outer telescopic plates further assists in adapting to deformation. This design overcomes the limitations of traditional rigid connections that cannot release stress, avoiding problems such as pipe disconnection and structural failure caused by stress concentration, and significantly improving the applicability and durability of the device in complex environments.

[0018] 3. Achieve bolt anti-loosening and self-locking to ensure the stability of the connection structure.

[0019] This invention innovatively achieves bolt anti-loosening functionality through the cooperation of a rotating sleeve and a torsion spring. The hexagonal groove on one side of the rotating sleeve precisely matches the hexagonal head of the expansion bolt or stainless steel bolt. After engagement, the torsion spring's return torque direction is consistent with the bolt tightening direction (clockwise). When the bolt shows a counter-clockwise loosening tendency due to vibration, load, or other factors, the torsion spring generates a clockwise return torque, which is transmitted to the bolt through the rotating sleeve, preventing loosening. This anti-loosening structure requires no additional anti-loosening parts and is installed synchronously with the device, effectively solving the problem of easy loosening of traditional flange bolts and ensuring the long-term stability of the connection structure between the sealing expansion assembly and the well wall or pipeline.

[0020] IV. Simplify maintenance procedures and reduce subsequent operation and maintenance costs.

[0021] In terms of ease of maintenance, this utility model has significant advantages. The sealing expansion joint adopts a modular connection method of retaining ring and flange. When the sealing sleeve ages or is damaged, it can be replaced by disassembling the stainless steel bolts and expansion bolts, separating the second flange from the retaining ring, without the need for large-scale modification of the pipeline or well wall. At the same time, the expansion joint's outer telescopic rod, inner telescopic rod, and rotating sleeve have simple structures and reliable connections. When a fault occurs, they can be disassembled and replaced accordingly without the need to dismantle the entire device. Compared with the complex maintenance methods of traditional rigid connections that require breaking through concrete encapsulation, this device greatly simplifies the operation and maintenance process, reducing maintenance time and costs.

[0022] V. Extends the service life of the device, combining economy and practicality.

[0023] This invention extends the overall service life of the device through multiple structural designs: the rubber corrugated structure of the sealing sleeve is anti-aging and wear-resistant, maintaining sealing performance for a long time; the sliding and buffering structure of the maintenance telescopic component reduces mechanical damage to the connection between the pipe and the well wall; and the bolt anti-loosening structure prevents chain damage caused by loose connections. The extended service life of the device reduces the frequency of equipment replacement, minimizing material and labor costs associated with repeated construction. Furthermore, the overall structural design is simple, components are easy to process and procure, and the installation process is standardized and controllable, balancing economic efficiency and practicality for engineering applications, making it suitable for large-scale promotion and use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the retractable device installed inside the well for a river-crossing inverted siphon provided by this utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the well wall is shown;

[0026] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of the telescopic outer panel shown;

[0027] Figure 4 for Figure 3 The diagram shows the structure of the telescopic outer rod.

[0028] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the telescopic outer rod shown;

[0029] Figure 6 for Figure 4 The diagram shows the structure of the sealing sleeve.

[0030] Figure 7 for Figure 6 The diagram shows the structure of the mounting ring.

[0031] Labels in the diagram: 1. Well wall; 2. Pipe body; 3. First flange; 4. Sealing sleeve; 5. Mounting ring; 6. Snap ring; 7. Second flange; 8. Expansion bolt; 9. Stainless steel bolt; 10. Telescopic outer rod; 11. Telescopic inner rod; 12. Telescopic outer plate; 13. Telescopic inner plate; 14. Slide groove; 15. Spring; 16. Rotating sleeve; 17. Torsion spring; 18. Rubber pad. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0033] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0034] Please see Figures 1 to 7 A retractable device installed inside a well for a river-crossing inverted siphon, comprising: a well wall 1, through which a pipe body 2 passes, and a first flange 3 fixedly connected to one end of the pipe body 2; a sealing expansion assembly installed between the first flange 3 and the well wall 1, the sealing expansion assembly being used to seal the space between the first flange 3 and the well wall 1; a maintenance expansion assembly installed on the outside of the sealing expansion assembly, the maintenance expansion assembly being used to protect the sealing expansion assembly and the pipe body 2 between the first flange 3 and the well wall 1; the sealing expansion assembly comprising: a sealing sleeve 4, with mounting rings 5 ​​fixedly connected to both ends of the sealing sleeve 4, retaining rings 6 fixedly connected to the opposing sides of the two mounting rings 5, and second flanges 7 snapped onto the opposing sides of the two mounting rings 5; of the two second flanges 7, one second flange 7 is fixedly connected to the well wall 1 by expansion bolts 8, and the other second flange 7 is fixedly connected to the first flange 3 by stainless steel bolts 9.

[0035] It should be noted that: the inner wall of the well wall 1 is arc-shaped, and a rubber gasket 18 is installed between the well wall 1 and the second flange 7. The expansion bolt 8 passes through the rubber gasket 18, and the rubber gasket 18 is used to seal the well wall 1 and the second flange 7; the pipe body 2 and the well wall 1 can slide relative to each other, the pipe body 12 is a PE pipe, and the first flange 3 is a PE flange; the sealing sleeve 4 is made of rubber and is corrugated, and the second flange 7 and the mounting ring 5 are connected by a retaining ring 6.

[0036] Please see Figures 2 to 5 The maintenance telescopic assembly includes: four telescopic outer rods 10, which are equidistantly arranged between two second flanges 7, and one end of each telescopic outer rod 10 is slidably connected to a telescopic inner rod 11; four telescopic outer plates 12 are equidistantly arranged on the outer side of the sealing sleeve 4, and both ends of the telescopic outer plates 12 are fixedly connected to the telescopic outer rods 10; telescopic inner plates 13 are slidably connected inside each telescopic outer plate 12, and both ends of the telescopic inner plates 13 are fixedly connected to the telescopic inner rods 11; sliding grooves 14 are provided on both sides of the telescopic outer rods 10, and the ends of the telescopic inner plates 13 slide in the sliding grooves 14; springs 15 are fixedly connected to the inner wall of the telescopic outer rods 10, and one end of the springs 15 is fixedly connected to one end of the telescopic inner rods 11; rotating sleeves 16 are rotatably connected to the opposite ends of the telescopic outer rods 10 and the telescopic inner rods 11; torsion springs 17 are fixedly connected inside the opposite ends of the telescopic outer rods 10 and the telescopic inner rods 11, and the outer end of the torsion springs 17 is fixedly connected to the rotating sleeves 16.

[0037] It should be noted that: the telescopic inner plate 13 is slidably connected to the telescopic outer plate 12 and the telescopic outer rod 10, and the telescopic inner plate 13 is fixedly connected to the telescopic inner rod 11. Therefore, the telescopic inner rod 11 and the telescopic outer rod 10 will not rotate relative to each other. A hexagonal groove is provided on one side of the rotating sleeve 16. The size of the hexagonal groove is the same as the hexagonal size of the expansion bolt 8 and the stainless steel bolt 9. The return torsion direction of the torsion spring 17 is consistent with the tightening direction of the expansion bolt 8 and the stainless steel bolt 9 (i.e., clockwise rotation). The torsion spring 17 prevents the rotating sleeve 16 from rotating in the direction of loosening of the expansion bolt 8 and the stainless steel bolt 9, thereby achieving the purpose of preventing the expansion bolt 8 and the stainless steel bolt 9 from loosening.

[0038] The working principle of the retractable device installed inside the well for the inverted siphon for river crossing provided by this utility model is as follows:

[0039] 1. Installation and fixing of the sealing expansion joint and the pipe body 2

[0040] This step aims to achieve a sealed connection between the pipe body 2 and the well wall 1 through the sealing expansion joint, while also providing a basis for the relative sliding between the pipe body 2 and the well wall 1. The specific process is as follows:

[0041] The engagement and fixation of the mounting ring 5 at one end of the sealing sleeve 4 with the second flange 7: Select a corrugated rubber sealing sleeve 4, align the mounting ring 5 at one end of it with one of the second flanges 7, and use the retaining ring 6 on the mounting ring 5 to achieve a snap-fit ​​engagement with the second flange 7, ensuring a stable connection. Subsequently, use expansion bolts 8 to fix the second flange 7 to the well wall 1. During the fixing process, the second flange 7 will exert a compressive force on the mounting ring 5 and the sealing gasket 18, causing the mounting ring 5 and the sealing gasket 18 to fit tightly together, making the rubber sealing sleeve 4 fit tightly against the well wall 1, and thus initially achieving a seal between the well wall 1 and the sealing sleeve 4.

[0042] The mounting ring 5 at the other end of the sealing sleeve 4 is engaged with the second flange 7 and the pipe body 2 is fixed: The mounting ring 5 at the other end of the sealing sleeve 4 is engaged with another second flange 7 via the retaining ring 6 on it. Since one end of the pipe body 2 is already fixedly connected to the first flange 3, the second flange 7 is fixed to the first flange 3 with stainless steel bolts 9. During the tightening of the bolts, the second flange 7 and the first flange 3 will jointly form a clamping force on the mounting ring 5 at this end of the sealing sleeve 4, further ensuring the sealing performance of the sealing sleeve 4, and at the same time completing the connection between the pipe body 2 and the sealing expansion assembly. At this time, the pipe body 2 and the well wall 1 can slide relative to each other.

[0043] II. Attachment and installation of the rotating sleeve 16 at one end of the telescopic inner rod 11 and the stainless steel bolt 9

[0044] This step involves engaging the rotating sleeve 16 at the end of the telescopic inner rod 11 in the maintenance telescopic assembly with the stainless steel bolt 9 to prevent loosening of the stainless steel bolt 9. The specific operation is as follows:

[0045] Sliding adjustment of the telescopic inner plate 13 and the telescopic inner rod 11: Since the telescopic inner plate 13 is slidably connected to the telescopic outer plate 12, and the telescopic inner plate 13 is fixedly connected to the telescopic inner rod 11, pushing the telescopic inner plate 13 towards the telescopic outer plate 12 will cause the telescopic inner plate 13 to simultaneously slide the telescopic inner rod 11 into the telescopic outer rod 10. During this process, the spring 15 fixedly connected to the inner wall of the telescopic outer rod 10 will be compressed, storing elastic potential energy to accommodate the subsequent docking distance requirements between the rotating sleeve 16 and the stainless steel bolt 9.

[0046] The rotation of the rotating sleeve 16 and the storage of force by the torsion spring 17: The rotating sleeve 16, which is rotatably connected to the telescopic inner rod 11, rotates counterclockwise. When the rotating sleeve 16 rotates, it will cause the torsion spring 17, which is fixedly connected inside the telescopic inner rod 11, to twist, and the torsion spring 17 will begin to store force. It should be noted that the return torsional direction of the torsion spring 17 is the same as the tightening direction of the stainless steel bolt 9 (i.e., clockwise rotation), which prepares for the subsequent anti-loosening action.

[0047] Engaging the rotating sleeve 16 with the stainless steel bolt 9: Holding the rotated and charged rotating sleeve 16 close to the stainless steel bolt 9, since the rotating sleeve 16 has a hexagonal groove on one side, and the groove size is the same as the hexagonal size of the stainless steel bolt 9, align the hexagonal groove of the rotating sleeve 16 with the hexagonal head of the stainless steel bolt 9 and engage it, completing the connection between the rotating sleeve 16 at the end of the telescopic inner rod 11 and the stainless steel bolt 9. At this time, if the stainless steel bolt 9 has a tendency to loosen (i.e., rotate counterclockwise), the torsion spring 17 will generate a clockwise reset torque, which is transmitted to the stainless steel bolt 9 through the rotating sleeve 16 to prevent it from loosening.

[0048] III. Attachment and installation of the rotating sleeve 16 at one end of the telescopic outer rod 10 and the expansion bolt 8

[0049] This step involves engaging the rotating sleeve 16 at the end of the telescopic outer rod 10 in the maintenance telescopic assembly with the expansion bolt 8 to prevent loosening of the expansion bolt 8. The specific operation is as follows:

[0050] Sliding adjustment of telescopic outer plate 12 and telescopic outer rod 10: Push the telescopic outer plate 12 towards the telescopic inner plate 13. The telescopic outer plate 12 will drive the telescopic outer rod 10 to slide synchronously, so that the distance between the telescopic outer rod 10 and the expansion bolt 8 is shortened. During this process, the spring 15 inside the telescopic outer rod 10 is further compressed (or adaptively compressed according to the actual position) to meet the distance requirements of the rotating sleeve 16 and the expansion bolt 8.

[0051] Rotation of the rotating sleeve 16 and the storage of force by the torsion spring 17: Rotating the rotating sleeve 16, which is rotatably connected to the telescopic outer rod 10, counterclockwise, will cause the torsion spring 17, which is fixedly connected inside the telescopic outer rod 10, to twist. The torsion spring 17 begins to store force, and its reset twisting direction is also clockwise, which is consistent with the tightening direction of the expansion bolt 8.

[0052] Engaging the rotating sleeve 16 with the expansion bolt 8: Hold the rotating sleeve 16 close to the expansion bolt 8, align the hexagonal groove on the rotating sleeve 16 with the hexagonal head of the expansion bolt 8, and engage them. When the expansion bolt 8 shows signs of loosening (rotating counterclockwise), the clockwise reset torque of the torsion spring 17 will act on the expansion bolt 8 through the rotating sleeve 16, effectively preventing it from loosening.

[0053] IV. Overall Operational Adaptability of the Device

[0054] After the device is installed, when affected by factors such as river water level fluctuations, ship dynamic loads, riverbed settlement, and temperature changes, the pipe body 2 and the well wall 1 will slide relative to each other. At this time:

[0055] The function of the sealing expansion assembly: The corrugated rubber sealing sleeve 4 can expand and contract with the relative displacement of the pipeline body 2 and the well wall 1, always maintaining the seal of the space between the two and effectively preventing leakage.

[0056] The function of the expansion joint is as follows: the inner expansion rod 11 and the outer expansion rod 10 slide accordingly with the displacement of the pipeline, and the spring 15 extends and retracts accordingly to adapt to the deformation; at the same time, the sliding fit between the inner expansion plate 13 and the outer expansion plate 12 can provide external protection for the sealing sleeve 4, preventing the sealing sleeve 4 from being directly subjected to external impact; and the rotating sleeve 16, under the action of the torsion spring 17, continuously plays an anti-loosening role for the expansion bolt 8 and the stainless steel bolt 9, ensuring the stability of each connection part, so that the whole device can effectively absorb the axial displacement and bending deformation of the pipeline, alleviate stress concentration, and avoid structural damage.

[0057] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A retractable device for a river-crossing inverted siphon disposed in a well, characterized in that, include: A well wall (1) has a pipe body (2) passing through its middle section. One end of the pipe body (2) is fixedly connected to a first flange (3). A sealing expansion assembly is installed between the first flange (3) and the well wall (1). The sealing expansion assembly is used to seal the space between the first flange (3) and the well wall (1). A maintenance expansion assembly is installed on the outside of the sealing expansion assembly. The maintenance expansion assembly is used to protect the sealing expansion assembly and the pipe body (2) between the first flange (3) and the well wall (1).

2. The retractable in-well arrangement for a river-crossing inverted siphon of claim 1, wherein, The sealing expansion assembly includes: a sealing sleeve (4), both ends of which are fixedly connected to mounting rings (5), and one retaining ring (6) is fixedly connected to one side of each of the two mounting rings (5) facing each other, and one second flange (7) is snapped onto one side of each of the two mounting rings (5) facing each other.

3. The retractable in-well arrangement for a river-crossing inverted siphon of claim 2, wherein, Of the two second flanges (7), one second flange (7) is fixedly connected to the well wall (1) by expansion bolts (8), and the other second flange (7) is fixedly connected to the first flange (3) by stainless steel bolts (9).

4. The retractable in-well arrangement for a river-crossing inverted siphon according to claim 3, wherein, The maintenance telescopic assembly includes: telescopic outer rods (10), four of which are equidistantly arranged between two second flanges (7), and one end of each telescopic outer rod (10) is slidably connected to a telescopic inner rod (11).

5. The retractable device installed inside a well for a river-crossing inverted siphon according to claim 4, characterized in that, Four telescopic outer plates (12) are equidistantly arranged on the outer side of the sealing sleeve (4). The two ends of the telescopic outer plates (12) are fixedly connected to the telescopic outer rod (10) respectively. The telescopic inner plates (13) are slidably connected inside the telescopic outer plates (12). The two ends of the telescopic inner plates (13) are fixedly connected to the telescopic inner rod (11) respectively.

6. The retractable device installed inside a well for a river-crossing inverted siphon according to claim 5, characterized in that, The telescopic outer rod (10) has grooves (14) on both sides. The end of the telescopic inner plate (13) slides in the grooves (14). A spring (15) is fixedly connected to the inner wall of the telescopic outer rod (10). One end of the spring (15) is fixedly connected to one end of the telescopic inner rod (11).

7. The retractable device installed inside a well for a river-crossing inverted siphon according to claim 6, characterized in that, The opposite ends of the telescopic outer rod (10) and the telescopic inner rod (11) are rotatably connected to a rotating sleeve (16), which is engaged with an expansion bolt (8) and a stainless steel bolt (9). The opposite ends of the telescopic outer rod (10) and the telescopic inner rod (11) are both fixedly connected to a torsion spring (17), and the outer end of the torsion spring (17) is fixedly connected to the rotating sleeve (16).

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