Underground drain pipe repairing and reinforcing device

Abstract

The utility model relates to building construction technical field discloses underground drainage pipe repairs and reinforcing device, including support framework, the support framework outer wall is provided with elastic sealing layer, the elastic sealing layer outer wall is provided with carbon fiber grid layer, the support framework includes hydraulic cylinder, the hydraulic cylinder output fixedly connected with telescopic head, the hydraulic cylinder outer wall is equipped with the fixed ring, the telescopic head outside annular is provided with six arc units, the telescopic head is hinged with arc unit through a connecting rod, the fixed ring is hinged with arc unit through another connecting rod, two the connecting rod inside all are penetrated and are opened and are provided with the sliding slot, two the sliding slot inner wall sliding connection has the connecting shaft. In the utility model, the repair structure is sent into the underground pipeline by the traction device, the hydraulic drive support is expanded and is pasted with the pipe wall fast, cooperates high temperature steam foaming and ultraviolet light curing process, completes the repair in short time, improves the maintenance efficiency and reduces the comprehensive cost.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a device for repairing and reinforcing underground drainage pipes. Background Technology

[0002] As an important public infrastructure, urban underground drainage pipe networks are prone to structural or functional defects such as cracks, leaks, and deformations due to geological changes, media corrosion, and load fatigue during long-term operation. These defects seriously affect drainage efficiency and may cause secondary disasters such as road collapses.

[0003] In existing underground drainage pipe network repair technologies, large excavating machinery is mainly used to break up the road surface and dig working pits. After removing the damaged pipe sections using hoisting equipment, new pipes are replaced. The pipes are then connected by manual welding or socket connection. Finally, compaction machinery is used to backfill the soil and restore the road surface structure. This repair method relies entirely on traditional construction machinery and manual operation. It requires the entire road or a large area to be excavated to form a continuous working surface before the pipe replacement operation can be carried out.

[0004] However, with the acceleration of urbanization, the aging problem of underground drainage pipe networks has become increasingly prominent. Traditional excavation repair methods are costly, time-consuming, and have a significant impact on traffic. In recent years, trenchless repair technologies such as in-situ solidification (CIPP) and spiral winding have gradually become popular. However, due to limitations in material properties or construction conditions, there are still problems such as insufficient repair strength and poor adaptability. Uneven foundation settlement, poor construction quality of pipes and their interfaces, inadequate sealing of the ends of closed sections, and poor construction quality of well bodies can all lead to water leakage. Utility Model Content

[0005] To address the above shortcomings, this utility model provides an underground drainage pipe repair and reinforcement device, which aims to improve the problems of construction disturbance caused by excavating and breaking roads to repair underground drainage pipe networks.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an underground drainage pipe repair and reinforcement device, including a support frame, wherein an elastic sealing layer is provided on the outer wall of the support frame, and a carbon fiber mesh layer is provided on the outer wall of the elastic sealing layer; The supporting frame includes a hydraulic cylinder, and a telescopic head is fixedly connected to the output end of the hydraulic cylinder. A fixing ring is sleeved on the outer wall of the hydraulic cylinder. Six arc-shaped units are arranged in a ring around the outside of the telescopic head. The telescopic head and the arc-shaped units are hinged through a connecting rod. The fixing ring and the arc-shaped units are hinged through another connecting rod. A sliding groove is opened through the interior of both connecting rods. A connecting shaft is slidably connected to the inner wall of the two sliding grooves.

[0007] The above technical solution employs a trenchless repair method, using a traction device to precisely insert the folded repair structure into the pipeline without excavating the road surface, reducing disruption to traffic and residents' lives. The hydraulically driven support expands rapidly and fits against the pipe wall, combined with high-temperature steam foaming and ultraviolet curing processes to achieve rapid repair, improve maintenance efficiency, and reduce overall costs.

[0008] Preferably, the arc-shaped unit is a retractable ring bracket made of 304 stainless steel.

[0009] Through the above technical solution, the combination design of double-link hinge and slide groove ensures the stability and synchronicity of the expansion process, ensuring that the arc-shaped unit expands or contracts radially along the predetermined path, and achieves uniform fit with the inner wall of the pipe.

[0010] Preferably, the hydraulic cylinder can be connected to an external pipeline robot, the pipeline robot being model K18.

[0011] The above technical solutions enable remote control and precise positioning of the repair process, reducing the difficulty and risk of manual operation and improving construction safety and accuracy.

[0012] Preferably, the connecting rod is made of 316L stainless steel, and the outer diameter of the bracket can be adjusted from 200 to 500 mm.

[0013] The above technical solutions employ high-strength, corrosion-resistant materials to ensure the durability of transmission components, and the wide-range diameter adjustment capability enables a single device to adapt to various common pipe diameters, improving the equipment's versatility and economy.

[0014] Preferably, the elastic sealing layer is a polyurethane foam material with a thickness of 20mm, which is wrapped on the outside of the arc-shaped unit with epoxy adhesive.

[0015] The above technical solution ensures that the foam layer is firmly bonded to the supporting frame and can expand and fill evenly in all directions after foaming, effectively sealing cracks and gaps in the pipe wall and achieving instant sealing and water stoppage.

[0016] Preferably, the carbon fiber mesh layer is composed of T300 grade carbon fiber cloth and modified acrylic resin, and is laid on the outer surface of the elastic sealing layer.

[0017] The above technical solution provides an extremely high strength-to-weight ratio, and the resin system has good UV curing characteristics. After curing, it can effectively bear the circumferential stress of the pipeline and prevent the pipe from deforming.

[0018] Preferably, the telescopic structure of the support frame allows the device to switch between a folded state and an expanded state, and can be fitted with elastic sealing layers and carbon fiber mesh layers of different sizes to accommodate different pipe diameters.

[0019] The above technical solutions facilitate the transportation and placement of the device in pipelines, improve its adaptability to small-diameter and curved pipelines, and expand the modularity and applicability of the device.

[0020] Preferably, the carbon fiber mesh layer, after curing, combines with the elastic sealing layer to form a composite tube structure.

[0021] The above technical solutions form a high-strength composite pipe-in-pipe structure, which can effectively share the internal and external loads borne by the pipeline, restore or even improve the structural performance of the original pipeline, and achieve long-term reliable repair.

[0022] This utility model has the following beneficial effects: 1. In this utility model, a trenchless repair method is used to precisely insert the folded repair structure into the underground pipeline using a traction device. This eliminates the need to excavate the road surface, greatly reducing disruption to traffic and residents' lives. The hydraulically driven support expands rapidly and fits against the pipe wall. Combined with high-temperature steam foaming and ultraviolet curing processes, a single-section repair process can be completed in a short time, significantly improving maintenance efficiency and reducing overall costs.

[0023] 2. In this utility model, the device takes into account both local damage repair and overall structural reinforcement of the pipeline. The elastic sealing layer effectively seals cracks and joint leakage, while the outer carbon fiber mesh layer forms a high-strength composite lining after curing, which improves the strength and corrosion resistance of the pipe body. Its compact and telescopic design can adapt to narrow pipe diameter spaces and can achieve precise positioning and construction with the help of pipeline robots. It is suitable for pipeline repair and reinforcement under various complex working conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the underground drainage pipe repair and reinforcement device proposed in this utility model; Figure 2 This is a schematic diagram of the arc-shaped unit structure of the underground drainage pipe repair and reinforcement device proposed in this utility model. Figure 3 This is a schematic diagram of the underground drainage pipe repair and reinforcement device proposed in this utility model. At this time, the support frame is in an expanded state. Figure 4 This is a schematic diagram of the arc-shaped unit structure of the underground drainage pipe repair and reinforcement device proposed in this utility model. At this time, the supporting frame is in an expanded state.

[0025] Legend: 1. Hydraulic cylinder; 2. Telescopic head; 3. Arc-shaped unit; 4. Elastic sealing layer; 5. Carbon fiber mesh layer; 6. Connecting rod; 7. Slide groove; 8. Connecting shaft; 9. Retaining ring. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail below.

[0027] Reference Figures 1-4 An embodiment of this utility model provides an underground drainage pipe repair and reinforcement device, including a support frame, an elastic sealing layer 4 on the outer wall of the support frame, and a carbon fiber mesh layer 5 on the outer wall of the elastic sealing layer 4.

[0028] The supporting frame includes a hydraulic cylinder 1 that provides power for the entire expansion movement. A telescopic head 2 is fixedly connected to the output end of the hydraulic cylinder 1. A fixing ring 9 for installing and positioning the hinged connecting rod 6 is sleeved on the outer wall of the hydraulic cylinder 1. Six arc-shaped units 3 are arranged in a ring around the outside of the telescopic head 2 to form a repair ring support surface, ensuring uniform contact with the pipe wall. The telescopic head 2 is hinged to the arc-shaped unit 3 through a connecting rod 6, and the fixing ring 9 is hinged to the arc-shaped unit 3 through another connecting rod 6. The double connecting rod hinge design ensures the stability and synchronization of the expansion process. A sliding groove 7 is opened through the inside of both connecting rods 6. A connecting shaft 8 is slidably connected to the inner wall of the two sliding grooves 7. The sliding grooves 7 and the connecting shaft 8 constrain the movement trajectory, ensuring that the arc-shaped unit 3 expands or contracts radially along a predetermined path.

[0029] Specifically, this device achieves rapid and reliable repair of underground drainage pipes under trenchless conditions by combining a retractable support frame with high-performance composite materials. The support frame provides initial mechanical support, the elastic sealing layer 4 achieves immediate sealing and water stoppage, and the carbon fiber mesh layer 5 provides long-term structural reinforcement to the repaired section. The entire system design takes into account the convenience of construction, the reliability of repair, and economy, and is especially suitable for emergency repair and preventive reinforcement projects of underground pipe networks in urban built-up areas.

[0030] Reference Figures 1-4The arc-shaped unit 3 is a retractable ring-shaped bracket made of 304 stainless steel. The hydraulic cylinder 1 can be connected to an external pipeline robot, model K18, reducing the difficulty and risk of manual operation. The connecting rod 6 is made of 316L stainless steel with an axial load capacity ≥5kN, ensuring the strength and durability of the transmission components. The bracket's outer diameter can be adjusted from 200-500mm, improving its versatility. The elastic sealing layer 4 is made of polyurethane foam, 20mm thick, and is coated on the outside of the arc-shaped unit 3 with epoxy adhesive. This design ensures that the foam layer is firmly bonded to the supporting frame and expands evenly to fill the surrounding area after foaming. Carbon fiber... The mesh layer 5 is composed of T300 grade carbon fiber cloth and modified acrylic resin, and is laid on the outer surface of the elastic sealing layer 4. The single layer has a basis weight of 200g / m². The telescopic structure of the supporting skeleton allows the device to be converted between a folded state and an expanded state, which facilitates the transportation and positioning of the device in the pipeline. Different sizes of elastic sealing layer 4 and carbon fiber mesh layer 5 can be installed to adapt to different pipe diameters, which improves the modularity and applicability of the device. After curing, the carbon fiber mesh layer 5 combines with the elastic sealing layer 4 to form a composite pipe structure, which can effectively share the internal and external loads borne by the pipeline, restore or even improve the structural performance of the original pipeline, and achieve long-term reliable repair.

[0031] Specifically, the support frame adopts a mechanical design combining multi-link 6 hinges and sliding grooves 7, which ensures the reliability and synchronization of the expansion and contraction process. Its wide-range diameter adjustment capability significantly improves the applicability of the equipment. The material selection and parameter setting of the elastic sealing layer 4 and the carbon fiber mesh layer 5 achieve the purpose of rapid sealing and water stoppage and long-term structural reinforcement. The entire device, through integration with the pipeline robot, facilitates precise trenchless repair operations and effectively solves the problems of low efficiency, large interference, and insufficient strength in traditional repair methods.

[0032] Working principle: When the underground drainage pipe repair and reinforcement device is needed, the entire device in a folded state is first sent into the pipe to be repaired by the traction equipment and accurately located to the damaged section. Then, the hydraulic cylinder 1 drives the telescopic head 2 at its output end to retract. The movement of the telescopic head 2 drives the six arc-shaped units 3 to expand outward synchronously through a set of hinged connecting rods 6. During this process, the connecting shaft 8 slides along the slide groove 7 inside the connecting rod 6 to ensure that the expansion movement is smooth and synchronous until the arc-shaped units 3 are tightly attached to the inner wall of the pipe.

[0033] Afterwards, high-temperature and pressurized steam is injected into the device using specialized equipment, causing the outer elastic sealing layer 4 to rapidly foam and expand, fully filling all cracks and gaps in the pipe wall to achieve instant sealing and water stoppage. Subsequently, the UV lamp vehicle moves along the pipe axis and rotates the carbon fiber mesh layer 5 360° to irradiate it, causing the pre-impregnated resin to cure rapidly and combine with the elastic sealing layer 4 to form a high-strength composite pipe-in-pipe structure. Finally, the output end of the hydraulic cylinder 1 extends, the device detaches from the repair section, leaving a new type of pipe liner that combines sealing performance and structural strength.

Claims

1. An underground drainage pipe repair and reinforcement device, including a support frame, characterized in that: The outer wall of the support frame is provided with an elastic sealing layer (4), and the outer wall of the elastic sealing layer (4) is provided with a carbon fiber mesh layer (5). The supporting frame includes a hydraulic cylinder (1), and a telescopic head (2) is fixedly connected to the output end of the hydraulic cylinder (1). A fixing ring (9) is sleeved on the outer wall of the hydraulic cylinder (1). Six arc-shaped units (3) are arranged in a ring around the outside of the telescopic head (2). The telescopic head (2) and the arc-shaped units (3) are hinged through a connecting rod (6). The fixing ring (9) and the arc-shaped units (3) are hinged through another connecting rod (6). A sliding groove (7) is opened through the interior of each of the two connecting rods (6). A connecting shaft (8) is slidably connected to the inner wall of the two sliding grooves (7).

2. The underground drainage pipe repair and reinforcement device according to claim 1, characterized in that: The arc-shaped unit (3) is a retractable ring bracket made of 304 stainless steel.

3. The underground drainage pipe repair and reinforcement device according to claim 2, characterized in that: The hydraulic cylinder (1) can be connected to an external pipeline robot, the pipeline robot being model K18.

4. The underground drainage pipe repair and reinforcement device according to claim 2, characterized in that: The connecting rod (6) is made of 316L stainless steel, and the outer diameter of the bracket can be adjusted from 200 to 500 mm.

5. The underground drainage pipe repair and reinforcement device according to claim 1, characterized in that: The elastic sealing layer (4) is a polyurethane foam material with a thickness of 20mm, which is wrapped on the outside of the arc-shaped unit (3) with epoxy adhesive.

6. The underground drainage pipe repair and reinforcement device according to claim 1, characterized in that: The carbon fiber mesh layer (5) is made of T300 grade carbon fiber cloth and modified acrylic resin, and is laid on the outer surface of the elastic sealing layer (4).

7. The underground drainage pipe repair and reinforcement device according to claim 1, characterized in that: The telescopic structure of the support frame allows the device to switch between a folded state and an expanded state, and can be fitted with elastic sealing layers (4) and carbon fiber mesh layers (5) of different sizes to accommodate different pipe diameters.

8. The underground drainage pipe repair and reinforcement device according to claim 1, characterized in that: After curing, the carbon fiber mesh layer (5) combines with the elastic sealing layer (4) to form a composite pipe structure.

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