A device for trenchless rehabilitation of a partial collapse of a communication conduit

Abstract

A trenchless repair device for partial collapse of a communication pipeline, belonging to the field of communication pipeline construction technology, includes: a jacking component, a release system, and an internal support system. The jacking component has a gradually expanding structure from the front end to the rear end, used for jacking repair of the collapsed area of ​​the communication pipeline. The release system is located inside the cavity of the jacking component. The internal support system is located at the rear end of the jacking component, and the central axes of both the internal support system and the jacking component are collinear with the central axis of the communication pipeline. The release system connects the internal support system and the jacking component, and the release system is controlled to release and detach the internal support system at the jacking component. This invention achieves multiple functions such as adaptive support, automatic continuous operation, and main body reuse through a collaborative mechanism and integrated design. Furthermore, the internal support structure, which contracts under normal conditions and expands in place, avoids rigid interference. The jacking and internal support coordination, as well as the unidirectional limiting function, fundamentally reduce the risk of secondary collapse.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of communication pipeline construction, and particularly relates to a communication pipeline local collapse non-excavation repair device. BACKGROUND

[0002] A communication pipeline is a tubular structure buried underground and used for external protection of a communication cable. Before laying the communication cable, a test operation is performed on the communication pipeline to verify the smoothness of the pipeline inner cavity. A conventional test operation method in the industry is to use a glass fiber pipe with a certain rigidity to penetrate into the pipeline inner cavity. If the glass fiber pipe can pass through the entire pipeline without obstruction, it is determined that the pipeline inner cavity has no collapse, deformation or other defects, and subsequent cable laying operation can be performed. If the glass fiber pipe is stuck during penetration and cannot be penetrated, it indicates that the pipeline has a local collapse problem.

[0003] The traditional treatment scheme for the local collapse of the communication pipeline mainly uses the local excavation repair method. This method needs to break the road surface structure above the collapse area, excavate the covering soil, expose the damaged part of the pipeline, and then implement the repair operation. This method has a large interference to the surrounding environment and road traffic. The excavation process will damage the road flatness and affect the vehicle and pedestrian traffic. In addition, the construction period is long, and many processes such as road breaking, soil excavation, pipeline repair, soil backfilling, and road recovery are required, which will affect the normal operation of the communication network for a long time.

[0004] In recent years, non-excavation repair technology has been gradually applied to the field of pipeline local collapse treatment. For example, in the prior art (Chinese patent with publication number CN210179169U), a pipeline structure collapse non-excavation repair device is disclosed, which includes a device main body. The device main body includes a repair mechanism and a crushing mechanism. The repair device includes a mounting bin, an expansion chamber, a support part, a base and a roller. The outside of the expansion chamber is provided with a pad. The roller is arranged at the bottom of the base. A lever is arranged on the mounting bin. The pad is an elastic plate. The inside of the mounting bin is provided with a gas booster, an electric control box and a driving device. The gas booster is provided with a gas channel, and the gas channel is in conductive connection with the expansion chamber. The electric control box is in wireless communication connection with an external control device. The electric control box is in control connection with the gas booster. The driving device is provided with a connecting shaft. The driving device is in control connection with the electric control box. The crushing mechanism includes a crushing head and a drag hook. The crushing mechanism is used to clean the foreign matter at the collapse site. The gas booster is used to expand the expansion chamber, so that the fast-drying cement is tightly attached to the collapse site, and the collapse site is repaired.

[0005] In the above-mentioned repair methods, the dented part of the pipeline repaired by jacking only achieves temporary morphological restoration and lacks a continuous and effective internal support structure to reinforce the repaired pipe wall. Under the long-term effects of the overburden pressure, ground stress, and residual deformation stress of the pipeline itself, the repaired part is very prone to collapse again, i.e., secondary collapse. Secondary collapse not only renders the previous repair work ineffective, but also causes compression and wear to the communication cables that are inserted later due to repeated deformation of the pipeline, affecting the stability of communication signal transmission, and even causing serious faults such as cable deformation and breakage, further increasing the difficulty and cost of subsequent maintenance. Summary of the Invention

[0006] To address the problems of existing trenchless pipeline repair technologies that only temporarily restore the collapsed area without providing sustained internal support, leading to secondary collapses, repair failures, cable damage, and increased maintenance costs, this invention provides a trenchless repair device for localized collapses of communication pipelines. After a jacking component repairs the localized collapse area of ​​the communication pipeline, an automatic internal support system is triggered to rapidly deploy at the repair point and form a stable internal support structure. This internal support structure can withstand the overburden pressure, ground stress, and residual deformation stress of the pipeline itself over a long period, fundamentally avoiding the risk of secondary collapse at the repair site. The specific technical solution is as follows:

[0007] A trenchless repair device for partial collapse of a communication pipeline is disclosed, comprising: a jacking assembly, a release system, and an internal support system. The jacking assembly has a gradually expanding structure from the front end to the rear end, and is used for jacking repair of the collapsed part of the communication pipeline. The release system is disposed within the cavity of the jacking assembly. The internal support system is disposed at the rear end of the jacking assembly, and the central axes of both the internal support system and the jacking assembly are collinear with the central axis of the communication pipeline. The release system is used to connect the internal support system and the jacking assembly, and the release system is controlled to release and detach the internal support system from the jacking assembly.

[0008] The internal support system includes: an arc-shaped internal support plate, and multiple sets of arc-shaped internal support plates are equidistantly arranged along the circumference. When the internal support system is detached from the jacking component, the multiple sets of arc-shaped internal support plates are linked to synchronously support the collapsed part of the communication pipeline outward.

[0009] The internal support system further includes: a connecting arm, a socket, an annular housing, a first connecting pin, a first arc-shaped through groove, a second connecting pin, a tension spring, and an annular plate. Two sets of connecting arms are symmetrically arranged on the left and right sides. The socket is formed through the side wall of the connecting arm. The annular housing is a hollow annular structure, and the two sets of connecting arms are respectively fixed and vertically installed on the front side wall of the annular housing. The first connecting pin is fixedly installed on the front side wall of the annular housing. The first arc-shaped through groove is formed through the front side wall of the annular housing, and the first arc-shaped through groove has an arc shape, and the arc of the first arc-shaped through groove is consistent with the arc of the side edge of the annular housing. The second connecting pin slides through the inner cavity of the first arc-shaped through groove. The two ends of the tension spring are respectively connected to the first connecting pin and the second connecting pin, for driving the second connecting pin to move along the first arc-shaped through groove towards the first connecting pin. The annular plate is rotatably embedded in the inner cavity of the annular housing, and the rear end of the second connecting pin is fixedly connected to the annular plate.

[0010] The internal support system further includes: a second arc-shaped through groove, a third connecting pin, and a movable arm. Multiple sets of the second arc-shaped through groove are inclined along the circumference of the annular piece and are equidistantly arranged along the circumference of the annular piece. Each set of the second arc-shaped through groove is an arc-shaped structure. The third connecting pin is slidably embedded in the inner cavity of each set of the second arc-shaped through groove. The movable arm is fixedly installed at the rear end of each set of the third connecting pin and slides through the side wall of the annular shell along the diameter direction of the annular shell. Each set of arc-shaped internal support plates is fixedly installed at the free end of each set of the movable arm.

[0011] The release system includes: a mounting arm, a crossbar, a servo cylinder, an L-shaped connecting piece, a drive rod, a plug, and a spring. The mounting arm is fixedly mounted on the rear side of the pushing assembly; the crossbar is fixedly mounted on the mounting arm in a horizontal direction; the servo cylinder is fixedly mounted in the middle of the crossbar; the L-shaped connecting piece is mounted on the output end of the servo cylinder; two sets of drive rods are symmetrically arranged about the output end of the servo cylinder, and one end of each set of drive rods is rotatably connected to the L-shaped connecting piece; two sets of plugs are symmetrically arranged about the center of the crossbar, and are slidably sleeved on the crossbar, and the other end of each set of drive rods is rotatably connected to the plug; two sets of springs are arranged, each sleeved on the crossbar, and both ends are fixedly connected to the plug and the side wall of the mounting arm, respectively.

[0012] In this configuration, the free end of each set of insert blocks is inserted into the inner cavity of each set of insert holes.

[0013] In the above technical solution, each group of the mobile arms is provided with an anti-reverse component. Each group of the anti-reverse component includes: a first elastic element and a limiting block. One end of the first elastic element is fixedly installed in the inner cavity of the mobile arm; the limiting block is fixedly installed in the other end of the first elastic element, and the limiting block is configured as a wedge-shaped block structure that is narrow at the top and wide at the bottom, and its outer side wall is configured as an inclined surface.

[0014] In the above technical solution, an expansion port is fixedly installed on the rear side of the annular shell, and the expansion port is arranged to gradually expand from front to back.

[0015] In the above technical solution, the pushing assembly includes: a pointed head, a flat section, and balls. The pointed head is configured as a pointed structure with an outwardly convex arc-shaped outer wall. The flat section is fixedly installed at the rear end of the pointed head and is configured as a hollow annular structure with a uniform diameter. Multiple balls are arranged in an arc-shaped rolling pattern and embedded in the side wall of the pointed head. Multiple rows of balls are arranged equidistantly along the circumference of the side wall of the pointed head, and each row of balls is torsional and misaligned relative to the outer wall of the pointed head.

[0016] In the above technical solution, a linkage component is provided between the release system and the internal support system. The linkage component includes a linkage rod and a limiting rod. One end of the linkage rod is fixedly installed on the L-shaped connecting piece. The limiting rod is fixedly installed on the rear end of the linkage rod, and the second connecting pin has a hole for the limiting rod to be inserted.

[0017] When the limiting rod is inserted into the hole in the second connecting pin, the tension spring is in a stretched state.

[0018] In the above technical solution, the inner cavity of the pushing assembly is provided with multiple sets of signal transmission components. Each set of signal transmission components corresponds to the position of each row of balls. Each set of signal transmission components includes: a mounting chamber, a second elastic element, an arc-shaped plate, and a trigger switch sensor. The mounting chamber is fixedly installed on the inner wall of the pointed head, forming a closed cavity with the pointed head inside the balls. Multiple sets of second elastic elements are provided, with one end of each set connected to the inner wall of the mounting chamber. The arc-shaped plate is connected to the other end of the multiple sets of second elastic elements, and the arc-shaped plate is configured as an arc structure. The arc of the arc-shaped plate is consistent with the arc of the pointed head, and the balls roll and fit against the side wall of the arc-shaped plate. The trigger switch sensor is installed on the inner wall of the mounting chamber. When the balls are pressed and move towards the inner cavity of the pointed head, the arc-shaped plate is driven to trigger the trigger switch sensor.

[0019] The above technical solution also includes a connecting assembly, which includes a fixing rod, a sleeve, a positioning pin, and a driving component. One end of the fixing rod is fixedly connected to the rear side wall of the crossbar; the sleeve is fixedly installed at the other end of the fixing rod, and the sleeve is configured as a hollow cylindrical structure; the positioning pin is threaded through the outer wall of the sleeve in the vertical direction; the driving component is inserted into the inner cavity of the sleeve, and the positioning pin is threaded through the outer wall of the driving component. The driving component is pushed by a thrust to propel the release system, the jacking assembly, and the inner support system as a whole along the inner cavity of the communication pipe.

[0020] The non-excavation repair device for partial collapse of communication pipelines of the present invention has the following advantages compared with the prior art:

[0021] I. Addressing the issue that existing trenchless pipeline repair technologies can only temporarily restore the collapsed area and lack continuous internal support, easily leading to secondary collapses, repair failure, damage to communication cables, and increased maintenance costs, this invention addresses this problem. After a jacking component repairs a localized collapse in a communication pipeline, an internal support system is automatically triggered to rapidly deploy at the repair point and form a stable internal support structure. This internal support structure can withstand the overburden pressure, ground stress, and residual deformation stress of the pipeline itself for a long period, fundamentally avoiding the risk of secondary collapse at the repair site. In other words, this invention employs a jacking and internal support collaborative operation mechanism, which not only ensures the stability of the initial jacking repair operation and avoids repeated construction due to secondary collapses, but also prevents repeated deformation of the pipeline inner wall from causing compression and wear on subsequently laid communication cables, ensuring the continuity and security of signal transmission. Simultaneously, it reduces the frequency and cost of subsequent inspections and maintenance, improving the engineering applicability of trenchless repair technology.

[0022] II. Existing trenchless repair technologies use fixed-diameter rigid liners that match the inner diameter of the pipeline. These liners can only travel axially within straight pipes, and when encountering curved pipe sections, they easily cause rigid interference with the inner wall, leading to failure to reach the repair point, liner deformation and damage, and scratches on the inner wall of the pipeline. Furthermore, they are only suitable for repairing collapses in straight pipes and cannot cover the widely existing curved pipe sections in communication networks, resulting in limited applicability, construction flexibility, and insufficient applicability. This invention employs multiple sets of circumferentially arranged curved inner support plates, which are normally in a contracted state, leaving a gap with the inner wall of the communication pipeline, allowing the equipment to... The entire device can move without needing to adhere to the pipe wall, effectively avoiding rigid interference and ensuring smooth passage through curved pipe sections. When it reaches the collapse repair point, multiple sets of curved inner support plates automatically expand outward simultaneously, forming a stable internal support structure at the pipe collapse site. This not only enables the jacking and repositioning of the collapsed part, but also provides continuous support for communication pipes of different diameters through the contraction and expansion of the curved inner support plates. This eliminates the need to prefabricate multi-specification lining pipes to adapt to communication pipes of different diameters, improving the adaptability and construction flexibility of the equipment, and reducing equipment procurement and storage costs.

[0023] Third, this invention employs a multi-component synchronous radial outward expansion internal support method to support the collapsed part of the communication pipeline. Compared with the traditional fixed liner internal support scheme, this method can apply an active outward support thrust to the collapsed part of the communication pipeline, constructing a mechanical support system that counteracts external soil pressure, stratum stress and other loads. This active support mode has two advantages. First, the active outward thrust can adapt to the irregular deformation after the pipeline collapses, forming a close-fitting support with the collapsed part, avoiding the stress concentration problem caused by insufficient fit between the traditional fixed liner and the pipe wall. Second, this support method can dynamically offset the continuous external load and maintain the structural stability of the pipeline after repair. Compared with the mode that relies solely on the stiffness of the liner itself to passively bear external forces, its support effect is more long-lasting and reliable, and can fundamentally reduce the probability of secondary collapse.

[0024] IV. In this invention, after the jacking component completes the jacking repair of the collapsed communication pipeline, the release system can automatically detach the internal support system from the jacking component through the linkage action, and simultaneously trigger the linkage component to release the limit on the second connecting pin, so as to automatically realize the outward expansion of multiple sets of circumferentially arranged arc-shaped internal support plates to form internal support; the above-mentioned jacking, detachment and internal support actions do not require additional control intervention and can be completed automatically and continuously, ensuring that the arc-shaped internal support plates are accurately supported in place. This linkage design improves the automation level and construction efficiency of the repair operation, while avoiding the action connection error caused by human intervention, and ensuring the operation accuracy of jacking and internal support.

[0025] V. In this invention, after the jacking component completes the jacking repair of the collapsed communication pipeline, the signal transmission component outputs a trigger signal and drives the servo electric cylinder to start. The servo electric cylinder drives the plug block to disengage from the inner cavity of the plug hole through the release system, releasing the connection between the connecting arm and the release system, and simultaneously releasing the limiting rod's limiting constraint on the second connecting pin. This invention, with the help of the release system, simultaneously realizes the two key actions of the disengagement of the internal support system from the release system and the outward expansion of each group of arc-shaped internal support plates to form internal support. There is no need to add an additional control module or actuator, which simplifies the equipment transmission structure while ensuring the continuity and synchronization accuracy of the action execution, effectively avoiding errors caused by step-by-step operation, and improving the construction efficiency of the continuous internal support structure for pipeline collapse repair.

[0026] VI. In this invention, the internal support system and the jacking component adopt a detachable connection structure. The internal support system is a disposable structure that can remain at the location of the communication pipeline collapse repair after deployment to continuously provide internal support and effectively resist soil pressure and ground stress. The jacking component and the release system can be withdrawn from the inner cavity of the communication pipeline as a whole for reuse. This invention achieves the separation of consumables and equipment body by releasing a single set of internal support systems in different communication pipelines, reducing the equipment investment cost of a single repair operation, while reducing the frequency of the equipment entering and leaving the pipeline as a whole, and reducing the risk of scratch damage to the inner wall of the pipeline.

[0027] VII. In this invention, when the mobile arm moves outward radially under control, the mobile arm can be stably positioned at the preset position of the annular shell through the coordinated limiting effect of the first elastic element and the limiting block. Even if the communication pipeline is subjected to inward loads such as external soil pressure and stratum stress, the limiting block can still maintain the limiting state of the mobile arm, preventing the mobile arm and the arc-shaped inner support plate from displacing due to reverse force, and ensuring that the inner support structure will not loosen or fail. This unidirectional limiting setting ensures the reliable anti-reverse performance of the inner support system, so that once each set of arc-shaped inner support plates is deployed to form an inner support, it can maintain a stable support form for a long time, continuously resist the residual deformation stress of the pipeline, reduce the risk of secondary collapse of the repair site, and significantly improve the long-term effectiveness and engineering reliability of trenchless repair operations.

[0028] 8. In this invention, the balls are arranged in adjacent rows, and the balls in each row are twisted and misaligned relative to the outer wall of the pointed head. Specifically, the front balls in the left row correspond to the rear balls in the adjacent row on the right. This design of the front and rear ends of the adjacent groups of balls on the left and right sides can form a detection coverage area without blind spots on the circumferential sidewall of the pointed head, ensuring that the collapse defects of the inner sidewall of the communication pipeline can be accurately detected in all directions without dead angles as the equipment travels along the inner cavity of the communication pipeline. This effectively avoids the problem of missed detection of collapse due to detection blind spots and improves the completeness and accuracy of pipeline collapse location identification.

[0029] 9. Compared to the triangular cross-section expansion head structure in the prior art, the pointed head of this invention adopts an outwardly convex arc-shaped pointed head structure in conjunction with multiple rows of circumferentially arranged ball bearings. This outwardly convex arc-shaped pointed head structure can optimize the contact pattern between the equipment and the inner wall of the communication pipeline. When the jacking component performs jacking repair on the collapsed part of the communication pipeline, it effectively reduces the contact friction force, making the jacking action smoother, reducing energy consumption during equipment movement and jacking, and reducing scratch damage to the inner wall of the pipeline. At the same time, this structure can adapt to the layout requirements of multiple rows of circumferentially arranged ball bearings, ensuring that each row of ball bearings can form effective contact with the inner wall of the communication pipeline, thereby realizing the detection and synchronous jacking repair of collapse defects in all circumferential directions of the communication pipeline without blind spots, avoiding the problem of local area detection failure or incomplete jacking due to insufficient structural adaptability.

[0030] 10. In this invention, the ball bearing has the ability to rotate in place. When it contacts and pushes against the inner wall of the pipe and the collapsed area, it can convert sliding friction into rolling friction, reducing frictional resistance during the pushing process and making the pushing action smoother, while reducing scratch damage to the inner wall of the pipe. At the same time, when the ball bearing is squeezed by the collapsed area and undergoes a small displacement inward relative to the pointed head, it can transmit this mechanical displacement to the arc-shaped plate, thereby realizing the precise triggering of subsequent chain actions. That is, the ball bearing in this invention integrates dual functions. This integrated design simplifies the number of execution components of the equipment, eliminating the need for additional dedicated detection or transmission components. While improving the compactness of the equipment structure, it ensures the synchronization and reliability of pushing repair and signal triggering.

[0031] XI. In this invention, the inner diameter of the communication pipeline is 1.5-1.8 times the inner diameter of the annular shell. This diameter ratio design provides sufficient installation and driving space for other components within the annular shell, allowing the arc-shaped inner support plate to effectively resist external soil pressure, ground stress, and residual deformation stress of the pipeline itself after lifting and resetting the collapsed part of the communication pipeline, forming a stable internal support to reduce the risk of secondary collapse. It also allows for the reservation of a central channel within the communication pipeline cavity to meet the requirements for the penetration and laying of communication cables, eliminating the need for additional secondary operations such as diameter expansion and hole cleaning, simplifying construction procedures and reducing operation and maintenance costs.

[0032] In summary, this invention addresses the pain points of trenchless pipeline repair technology, such as secondary collapse, poor adaptability to curved pipe sections, and low automation. Through a jacking and internal support synergy mechanism, an adaptive contraction and expansion structure, and integrated functional design, it achieves the following multiple benefits: The use of multiple sets of curved internal support plates that contract under normal conditions and expand in place effectively avoids rigid interference from curved pipe sections, adapts to different pipe diameters, and reduces procurement and storage costs; after jacking repair, the internal support system is automatically triggered to form stable internal support, combined with a unidirectional limiting structure to effectively resist external stress, reducing the risk of secondary collapse at its source and ensuring the safety of communication cables; the multi-component synchronous radial expansion active internal support method, compared to traditional fixed liner passive support, can achieve [the desired effect] by [adapting to] [the following conditions]. The external thrust counteracts external loads, adapts to irregular deformation caused by collapse, and provides a more long-term and reliable support effect, fundamentally reducing the probability of secondary collapse. Utilizing a linkage triggering and detachable connection design, it achieves automatic and continuous execution of jacking, detachment, and internal support actions. Furthermore, the internal support system is reused once, while the main equipment body is reusable, improving operational automation and economy. Through a pointed-head arc-shaped structure, a ball-bearing arc-shaped torsional misalignment layout, and functional integration design, it achieves seamless detection of pipeline collapses and low-friction jacking, optimizing equipment passability and operational accuracy. The design of the inner diameter ratio between the communication pipeline and the annular shell balances internal support stability with cable laying space, enhancing the engineering applicability and reliability of trenchless repair technology. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the communication pipe structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the pointed head structure of the present invention;

[0035] Figure 3 This is a front view of the annular shell of the present invention;

[0036] Figure 4 This is a schematic diagram of the flat section of the present invention;

[0037] Figure 5 This is a schematic diagram of the sleeve structure of the present invention;

[0038] Figure 6 This is a top view of the expanded port of the present invention;

[0039] Figure 7 This is a front view of the arc-shaped inner support plate of the present invention;

[0040] Figure 8 This is a schematic diagram of the linkage of the present invention;

[0041] Figure 9 This is a schematic diagram of the structure of the drive rod of the present invention;

[0042] Figure 10 This is a schematic diagram of the connecting arm of the present invention;

[0043] Figure 11 This is a schematic diagram of the structure of the insert block of the present invention;

[0044] Figure 12 This is a front view of the tension spring of the present invention;

[0045] Figure 13 This is a front sectional view of the annular shell of the present invention;

[0046] Figure 14 This is a schematic diagram of the structure of the second connecting pin of the present invention;

[0047] Figure 15 This is a schematic diagram of the expansion port structure of the present invention;

[0048] Figure 16 This is a schematic diagram of the structure of the annular sheet of the present invention;

[0049] Figure 17 This is a front view of the third connecting pin of the present invention;

[0050] Figure 18 This is a schematic diagram of the structure of the mobile arm of the present invention;

[0051] Figure 19 This is a schematic diagram of the structure of the limiting block of the present invention;

[0052] Figure 20This is a front view of the location of the limiting block when the arc-shaped inner support plate of the present invention is in the inner support state of the communication pipeline;

[0053] Figure 21 This is a schematic diagram showing the location of the limiting block in the internal support state of the arc-shaped inner support plate of the present invention when it is in the internal support state of the communication pipeline;

[0054] Figure 22 This is a schematic diagram of the signal transmission component of the present invention;

[0055] Figures 1 to 22 In the middle, 1. Communication pipe, 2. Pushing assembly, 201. Pointed head, 202. Flat section, 203. Ball bearing, 3. Release system, 301. Mounting arm, 302. Crossbar, 303. Servo electric cylinder, 304. L-shaped connecting piece, 305. Drive rod, 306. Insert block, 307. Spring, 4. Internal support system, 401. Connecting arm, 402. Insertion hole, 403. Annular housing, 404. Expansion port, 405. First connecting pin, 406. Second connecting pin, 407. Tension spring, 408. First arc shape 409. Through slot, 410. Annular piece, 411. Second arc-shaped through slot, 412. Third connecting pin, 413. Moving arm, 414. Arc-shaped inner support plate, 415. First elastic element, 416. Limiting block, 5. Linkage assembly, 501. Linkage rod, 502. Limiting rod, 6. Signal transmission assembly, 601. Second elastic element, 602. Arc-shaped piece, 603. Trigger switch sensor, 604. Mounting chamber, 7. Connecting assembly, 701. Fixing rod, 702. Sleeve, 703. Positioning pin, 704. Driving element. Detailed Implementation

[0056] The following are specific implementation cases and appendices. Figures 1 to 22 The present invention will be further described, but the present invention is not limited to these embodiments.

[0057] Existing trenchless pipeline repair technologies have limitations: they can only temporarily restore the collapsed area and lack sustained internal support, making them prone to secondary collapses. This can lead to repair failure, damage to communication cables, and increased maintenance costs. To address this issue, please refer to [the relevant literature / relevant ... Figures 1 to 4As shown, this invention proposes a trenchless repair device for partial collapse of a communication pipeline, used to repair partial collapse of a communication pipeline 1. It includes: a jacking assembly 2, a release system 3, and an internal support system 4. The jacking assembly 2 has a gradually expanding structure from the front end to the rear end, used for jacking repair of the collapsed area of ​​the communication pipeline 1, restoring the thrust at the partially collapsed area. The release system 3 is located inside the cavity of the jacking assembly 2. The internal support system 4 is located at the rear end of the jacking assembly 2, and the central axes of both the internal support system 4 and the jacking assembly 2 are collinear with the central axis of the communication pipeline 1, ensuring that the jacking assembly 2 and the internal support system 4 travel along the centerline of the communication pipeline 1. The release system 3 connects the internal support system 4 and the jacking assembly 2. The release system 3 is controlled to release and detach the internal support system 4 from the jacking assembly 2. After release, the internal support system 4 provides internal support to the partially collapsed area of ​​the communication pipeline 1, providing continuous internal support. The internal support system 4 is a single-use product. Its specifications, thickness, and material can be flexibly customized according to actual support needs to adapt to different pipe diameters and different degrees of collapse in communication pipeline 1 repair operations. For example, in the scenario of communication pipeline collapse repair, since the communication cable has its own outer sheath and the inside of the communication pipeline 1 is a dry environment free of water and debris, there are no special requirements for the waterproof performance of the internal support system 4. It is sufficient to select a material that meets the strength requirements of the internal support. The specific material of the internal support system 4 will not be further limited or described here. The internal support system 4 includes: an arc-shaped internal support plate 413. Multiple sets of arc-shaped internal support plates 413 are equidistantly arranged along the circumference. Specifically, in this embodiment, there are six sets of arc-shaped internal support plates 413. When the internal support system 4 is detached from the jacking component 2, the multiple sets of arc-shaped internal support plates 413 are linked to simultaneously move outward to provide internal support to the collapsed part of the communication pipeline 1.

[0058] This invention repairs a partial collapse of a communication pipeline 1 by jacking the pipeline 1 with the jacking component 2, which triggers the internal support system 4 to quickly deploy at the repair point to form a stable internal support. This internal support can withstand the overburden pressure, ground stress, and residual deformation stress of the pipeline for a long time, reducing the risk of secondary collapse from the root. This mechanism of jacking and internal support working together not only ensures the stability of the initial repair effect and avoids repeated construction, but also prevents repeated deformation of the pipeline from squeezing and wearing down the communication cables, ensuring the safe and continuous transmission of signals. At the same time, it reduces the cost of later inspection and maintenance, and improves the engineering applicability of trenchless repair technology.

[0059] Furthermore, the trenchless repair technology described in patent CN108716582B uses a fixed-diameter liner matching the inner diameter of the pipeline for internal repair operations. However, due to the rigid structural characteristics of the liner, it can only travel along the axial direction of a straight pipeline. When the pipeline has curvature, the liner is prone to rigid interference with the inner wall of the pipe section, meaning it cannot smoothly reach the collapse repair point and may also cause deformation and damage to the liner and scratches on the inner wall of the pipeline. In other words, this method makes the repair device only suitable for the collapse treatment of straight pipelines and difficult to cover the curved pipe sections that are widely present in communication pipelines. To address the above problems, this invention uses multiple sets of circumferentially arranged curved inner support plates 413. In normal operation, these plates contract and leave a gap with the inner wall of the communication pipeline 1, allowing them to pass smoothly through curved pipe sections and avoid rigid interference. After reaching the repair point, they expand outward simultaneously to form stable internal support, which can not only achieve collapse repositioning but also adapt to pipelines of different diameters through contraction and expansion characteristics. This eliminates the need for prefabricated multi-specification liner, improving construction flexibility and adaptability, and reducing equipment procurement and storage costs.

[0060] This invention employs a multi-component synchronous radial expansion active internal support method to protect the collapsed portion of the communication pipeline 1. Compared to the traditional fixed liner passive internal support scheme, it can apply outward support thrust to construct a mechanical support system that resists external soil pressure and stratum stress. This active support can adapt to irregular deformation after collapse, forming a close-fitting support to avoid stress concentration, and can dynamically offset continuous external loads to maintain the structural stability of the pipeline after repair. Compared to the passive support mode, it has greater long-term effectiveness and reliability, and can reduce the probability of secondary collapse from the root.

[0061] Main references Figures 2 to 4 , Figure 6 , Figure 7 , Figure 10 , Figures 13 to 15As shown, the internal support system 4 also includes: a connecting arm 401, a socket 402, an annular housing 403, a first connecting pin 405, a first arc-shaped through groove 408, a second connecting pin 406, a tension spring 407, and an annular plate 409. Two sets of connecting arms 401 are symmetrically arranged on the left and right sides. The socket 402 is formed through the side wall of the connecting arm 401. The annular housing 403 is a hollow annular structure, and the two sets of connecting arms 401 are fixed and vertically installed on the front side wall of the annular housing 403. The shortest distance between the edge of the annular housing 403 and the inner wall of the communication pipe 1 is less than the diameter of the communication cable to be laid. This prevents the communication cable from getting stuck in the gap between the annular housing 403 and the inner wall of the communication pipe 1 when it passes through the inner cavity of the communication pipe 1. This distance only needs to meet the above requirements; the function of the annular housing 403 is to provide guidance and positioning for the subsequent laying of the communication cable within the communication pipe 1. In addition, the inner diameter of the communication pipeline 1 is set to be 1.5-1.8 times the inner diameter of the annular shell 403. This diameter ratio can, on the one hand, reserve sufficient installation and driving space for other components inside the annular shell 403, and ensure that after the arc-shaped inner support plate 413 completes the lifting and repositioning of the collapsed part of the communication pipeline 1, it can effectively resist the external soil pressure, stratum stress and residual deformation stress of the pipeline itself, forming a stable internal support to reduce the risk of secondary collapse. On the other hand, a central channel that meets the requirements for the penetration and laying of communication cables can be reserved in the inner cavity of the communication pipeline 1, without the need for additional secondary operations such as diameter expansion and hole cleaning, thereby simplifying the construction process and reducing operation and maintenance costs. The first connecting pin 405 is fixedly installed on the front side wall of the annular housing 403; the first arc-shaped through groove 408 is opened through the front side wall of the annular housing 403, and the first arc-shaped through groove 408 has an arc structure, and the arc of the first arc-shaped through groove 408 is consistent with the arc of the side edge of the annular housing 403; the second connecting pin 406 slides through the inner cavity of the first arc-shaped through groove 408; the two ends of the tension spring 407 are respectively connected to the first connecting pin 405 and the second connecting pin 406, and are used to drive the second connecting pin 406 to move along the first arc-shaped through groove 408 towards the first connecting pin 405. The elastic force of the tension spring 407 can drive the second connecting pin 406 to move along the inner cavity of the first arc-shaped through groove 408, simultaneously driving the annular plate 409 to rotate counterclockwise, and driving each set of moving arms 412 and the arc-shaped inner support plate 413 to move radially outward; this elastic force is the elastic potential energy released during the reverse reset process after the tension spring 407 is released from the tension constraint. The tension spring 407 only needs to meet the above-mentioned usage requirements, and the elastic coefficient and other performance parameters of the tension spring 407 will not be further limited or described here. The annular plate 409 is rotatably embedded in the inner cavity of the annular housing 403, and the rear end of the second connecting pin 406 is fixedly connected to the annular plate 409.

[0062] Main references Figures 13 to 15As shown, the inner support system 4 also includes: a second arc-shaped through groove 410, a third connecting pin 411, and a movable arm 412. The second arc-shaped through groove 410 is inclined in multiple sets along the circumference of the annular piece 409 and is equidistant along the circumference of the annular piece 409. Each set of second arc-shaped through grooves 410 is an arc-shaped structure. The third connecting pin 411 is slidably embedded in the inner cavity of each set of second arc-shaped through grooves 410. The movable arm 412 is fixedly installed at the rear end of each set of third connecting pins 411 and slides through the side wall of the annular housing 403 along the diameter direction of the annular housing 403. Each set of arc-shaped inner support plates 413 is fixedly installed at the free end of each set of movable arms 412.

[0063] Main references Figures 17 to 21 As shown, each set of movable arms 412 is provided with an anti-reverse assembly. Each set of anti-reverse assemblies includes: a first elastic member 414 and a limiting block 415. One end of the first elastic member 414 is fixedly installed in the inner cavity of the movable arm 412; the limiting block 415 is fixedly installed in the other end of the first elastic member 414, and the limiting block 415 is set as a wedge-shaped block structure that is narrow at the top and wide at the bottom, and its outer side wall is set as an inclined surface.

[0064] When the movable arm 412 moves outward along the diameter of the annular shell 403, the limiting block 415 in its inner cavity retracts into the cavity due to the limiting effect of the inclined surface on the side wall of the annular shell 403, and the first elastic element 414 is compressed accordingly. When the movable arm 412 moves outward to the inner wall of the arc-shaped inner support plate 413 that is in contact with the collapsed repair site of the communication pipeline 1, the limiting block 415 disengages from the limiting position and extends out of the side wall of the movable arm 412 under the elastic force of the first elastic element 414, forming a limiting position with the outer wall of the annular shell 403, preventing the movable arm 412 from moving in the opposite direction, thereby locking the inner support position of the arc-shaped inner support plate 413 and preventing it from retracting.

[0065] In this invention, when the movable arm 412 moves radially outward under control, it can be stably fixed in a preset position within the annular shell 403 by the coordinated restraint of the first elastic element 414 and the limiting block 415. Even if the communication pipeline 1 subsequently bears inward loads such as external soil pressure and ground stress, the limiting block 415 can still maintain the restraining effect on the movable arm 412, preventing displacement of the movable arm 412 and the arc-shaped inner support plate 413 due to reverse forces, and preventing the inner support structure from loosening and failing. This unidirectional restraint design ensures the reliable anti-reverse performance of the inner support system, enabling multiple sets of arc-shaped inner support plates 413 to maintain a stable support form for a long time after unfolding to form an inner support, continuously resisting the residual deformation stress of the pipeline, avoiding the risk of secondary collapse of the repair site, and improving the long-term effectiveness and engineering reliability of trenchless repair operations.

[0066] Main references Figure 6 , Figure 15 , Figure 16As shown, an expansion port 404 is fixedly installed on the rear side of the annular housing 403. The expansion port 404 is set with a gradually expanding trend from front to back, that is, the expansion port 404 is set at the insertion end of the communication cable into the inner cavity of the communication pipe 1. Its expansion structure can form a limiting and guiding effect on the communication cable subsequently laid in the inner cavity of the communication pipe 1, which can effectively prevent the communication cable from getting stuck in the gap between the arc-shaped inner support plate 413 and the communication pipe 1, as well as the gap between adjacent arc-shaped inner support plates 413, ensuring the smoothness and stability of the communication cable laying.

[0067] Main references Figure 2 , Figures 4 to 6 As shown, the jacking assembly 2 includes: a pointed head 201, a flat section 202, and a ball bearing 203. The pointed head 201 is configured as a pointed structure with an outwardly convex arc-shaped outer wall. The flat section 202 is fixedly installed at the rear end of the pointed head 201 and is configured as a hollow, uniform-diameter annular structure. In this invention, the flat section 202 adopts a uniform-diameter annular structure and is designed with a narrow width. This structure can not only ensure that the equipment can pass smoothly through the inner cavity of the arc-shaped communication pipe 1, but also form a temporary horizontal transition support for the operation process of the pointed head 201 jacking the collapsed part of the communication pipe 1. The narrow-width, uniform-diameter annular structure can effectively reduce the contact area with the inner wall of the pipe, reduce the frictional resistance and jamming risk when the equipment travels in the arc-shaped pipe section, and ensure the equipment's passability. At the same time, its temporary support function can stabilize the jacking posture of the pointed head 201, avoid deviation or instability during the jacking process, and also reserve sufficient reaction transition time for the subsequent linkage deployment of multiple sets of arc-shaped inner support plates 413 to ensure precise and continuous connection between the jacking reset and the inner support deployment, thereby improving the stability and efficiency of the overall repair operation. Multiple balls 203 are arranged in an arc shape and embedded in the side wall of the pointed head 201. Multiple rows of balls 203 are equidistantly arranged along the circumference of the side wall of the pointed head 201. In this invention, the balls 203 have the ability to rotate in place. When they come into contact with the inner wall of the pipe and the collapsed area, they can convert sliding friction into rolling friction, reduce the frictional resistance during the pushing process, make the pushing operation smoother, and reduce the scratch damage to the inner wall of the pipe. Each row of balls 203 is torsionally offset relative to the outer wall of the pointed head 201.

[0068] When the jacking assembly 2 moves to the partially collapsed area of ​​the communication pipeline 1, the rolling ball 203, which can roll in place, replaces the pointed head 201 in contact with the collapsed area, reducing the frictional resistance of the jacking and resetting. With the help of the pointed structure at the front end of the pointed head 201, the jacking and resetting force can be applied smoothly, and the resetting of the collapsed area of ​​the communication pipeline 1 can be completed under the continuous drive of the external power. Then the jacking assembly 2 continues to move, and the horizontal section 202 passes through the repair area, forming a temporary transition support for the collapsed repair area of ​​the communication pipeline 1.

[0069] In this invention, each group of balls 203 is arranged in an adjacent row with a torsional misalignment relative to the outer wall of the pointed head 201. Specifically, the balls 203 at the front end of the left row correspond to the balls 203 at the rear end of the adjacent row on the right. This arrangement allows the circumferential sidewall of the pointed head 201 to form a blind-spot-free detection coverage area, ensuring that when the device travels along the inner cavity of the communication pipe 1, it can accurately detect the collapse defects of the inner wall of the communication pipe 1 in all directions without dead angles, effectively avoiding the problem of missed collapse detection and improving the completeness and accuracy of pipe collapse location identification.

[0070] Furthermore, compared to the triangular cross-section of the expansion head in Chinese Patent CN108716582B, this invention designs the pointed head 201 as a convex arc-shaped pointed structure, coupled with multiple rows of circumferentially arranged ball bearings 203. This structure optimizes the contact pattern with the inner wall of the communication pipeline 1, effectively reducing contact friction when the jacking assembly 2 jacks and repairs the collapsed area of ​​the communication pipeline 1, making the jacking operation smoother, reducing energy consumption during equipment movement and jacking, and reducing scratch damage to the inner wall of the pipeline. In addition, this structure can adapt to the arrangement requirements of multiple rows of circumferentially arranged ball bearings 203, ensuring that each row of ball bearings 203 can effectively contact the inner wall of the communication pipeline 1, thereby achieving blind-angle detection and synchronous jacking repair of collapse defects in all directions around the communication pipeline 1, avoiding problems such as local area detection failure or incomplete jacking caused by insufficient structural adaptability.

[0071] Main references Figure 3 , Figure 5 , Figures 8 to 11As shown, the release system 3 includes: a mounting arm 301, a crossbar 302, a servo cylinder 303, an L-shaped connecting piece 304, a drive rod 305, an insert block 306, and a spring 307. The mounting arm 301 is fixedly mounted on the rear side of the push assembly 2. Specifically, the mounting arm 301 is fixedly mounted on the rear side wall of the pointed head 201, thereby achieving a stable connection between the mounting arm 301 and the push assembly 2. The crossbar 302 is fixedly mounted on the mounting arm 301 in the horizontal direction, and both ends of the crossbar 302 are fixedly connected to the inner side wall of the flat section 202, further providing a stable connection between the crossbar 302 and the push assembly 2. The servo cylinder 303 is fixedly mounted in the middle of the crossbar 302. The servo cylinder 303 is a commercially available general-purpose servo cylinder, and this equipment uses existing mature industrial technology to achieve its off-grid operation. For example, the following solution can be adopted: a lithium battery pack with BMS protection is used as the energy storage unit, and the servo driver is powered by the isolated DC-DC power supply module after voltage regulation; the driver receives commands from the host computer, drives the motor to drive the piston rod to move linearly through the ball screw, and the absolute encoder feedback signal forms a closed-loop control to achieve precise positioning and thrust adjustment; the system is equipped with protective components such as fuses and contactors to deal with electrical abnormalities. The lithium battery pack, DC-DC power supply module, servo driver, encoder and protective components involved in the above power supply solution are all existing commercial industrial components. The electrical connection method and control logic of each component follow the conventional application specifications of servo systems. Stable operation of the servo cylinder 303 without mains power can be achieved simply by modular integration. That is, any existing technical solution that can enable the servo cylinder 303 to operate stably without mains power can be used, and this technology will not be elaborated or limited here. L-shaped connecting piece 304 is installed at the output end of servo cylinder 303; two sets of drive rods 305 are symmetrically arranged on the left and right with the output end of servo cylinder 303 as the axis, and one end of each set of drive rods 305 is rotatably connected to L-shaped connecting piece 304; two sets of insert blocks 306 are symmetrically arranged on the left and right with the center of crossbar 302 as the axis, respectively slidingly sleeved on crossbar 302, and the other end of each set of drive rods 305 is rotatably connected to insert block 306; two sets of springs 307 are arranged, respectively sleeved on crossbar 302, and both ends are fixedly connected to insert block 306 and mounting arm 301 side wall respectively; wherein, the free end of each set of insert blocks 306 is inserted into the inner cavity of each set of insertion holes 402.

[0072] In this invention, after the jacking component 2 completes the jacking repair of the collapsed section of the communication pipeline 1, it can automatically separate the internal support system 4 from the jacking component 2 with the help of the linkage of the release system 3, and simultaneously trigger the linkage component 5 to release the limit on the second connecting pin 406, thereby causing the multiple sets of arc-shaped internal support plates 413 arranged in the circumferential direction to expand outward to form internal support; the entire process of jacking, separation and internal support can be completed automatically and continuously without additional control intervention, which not only ensures that the arc-shaped internal support plates 413 are accurately supported in place, but also improves the automation level and construction efficiency of the repair operation, while avoiding the action connection error caused by human intervention, and ensuring the operation accuracy of jacking and internal support.

[0073] Furthermore, in this invention, the internal support system 4 and the jacking component 2 adopt a detachable connection design. The internal support system 4 is a single-use structure that, after deployment, can be left at the collapse repair location of the communication pipeline 1 to continuously provide internal support and effectively resist soil pressure and ground stress. The jacking component 2 and the release system 3 can be completely removed from the inner cavity of the communication pipeline 1 for reuse. This design achieves the separation of consumables and the main body of the equipment, reducing the equipment investment cost per repair operation, while also reducing the frequency of equipment entering and exiting the pipeline, thus reducing the risk of scratch damage to the inner wall of the pipeline.

[0074] Main references Figures 8 to 11 As shown, a linkage component 5 is provided between the release system 3 and the inner support system 4. The linkage component 5 includes a linkage rod 501 and a limiting rod 502. One end of the linkage rod 501 is fixedly installed on the L-shaped connecting piece 304. The limiting rod 502 is fixedly installed on the rear end of the linkage rod 501, and a hole for the limiting rod 502 to be inserted is provided on the second connecting pin 406. When the limiting rod 502 is inserted into the inner cavity of the hole on the second connecting pin 406, the tension spring 407 is in a stretched state.

[0075] While the L-shaped connecting piece 304 moves forward, it drives the connecting rod 501 and the limiting rod 502 to move synchronously, so that the connecting rod 501 moves forward and releases the limiting of the second connecting pin 406. The second connecting pin 406, which is no longer limited, moves along the first arc-shaped through groove 408 under the elastic tension of the tension spring 407, which drives the annular piece 409 to rotate counterclockwise along the inner cavity of the annular shell 403, thereby driving multiple sets of third connecting pins 411 and moving arms 412 to move outward synchronously. After the jacking assembly 2 completes the jacking repair of the collapsed communication pipeline 1 and the internal support system 4 moves to the repair point, multiple sets of arc-shaped internal support plates 413 expand outward synchronously to form a stable internal support for the repaired part of the communication pipeline 1.

[0076] Main references Figure 22As shown, the inner cavity of the push assembly 2 is provided with multiple sets of signal transmission components 6. Each set of signal transmission components 6 corresponds to the position of each row of balls 203. Each set of signal transmission components 6 includes: a mounting chamber 604, a second elastic element 601, an arc-shaped piece 602, and a trigger switch sensor 603. The mounting chamber 604 is fixedly installed on the inner wall of the pointed head 201, forming a closed cavity with the pointed head 201 inside the balls 203. Multiple sets of second elastic elements 601 are provided, with one end of each set of second elastic elements 601 connected to the inner wall of the mounting chamber 604. The arc-shaped piece 602 is connected to the other end of the multiple sets of second elastic elements 601, and the arc-shaped piece 602 is configured as an arc-shaped structure. The curvature of the arc-shaped plate 602 is consistent with the curvature of the pointed head 201, and the ball bearing 203 rolls and fits against the side wall of the arc-shaped plate 602. The trigger switch sensor 603 is installed on the inner side wall of the mounting chamber 604. When the ball bearing 203 is pressed and moves towards the inner cavity of the pointed head 201, it drives the arc-shaped plate 602 to trigger the trigger switch sensor 603. The trigger switch sensor 603 is a commercially available trigger switch sensor. When the sensor is triggered by the displacement of the arc-shaped plate 602, it outputs a trigger signal to start the servo cylinder 303. The performance indicators of the sensor can meet the usage requirements of this equipment. Its specific model, structure and trigger threshold are not further limited or described here. The trigger switch sensor 603 is electrically connected to the servo cylinder 303. When the ball 203 contacts the collapsed part of the communication pipe 1 and performs the jacking repair action, the trigger switch sensor 603 is triggered to act simultaneously. The trigger switch sensor 603 outputs a signal to drive the servo cylinder 303 to start, thereby triggering a series of operations to separate the internal support system 4 from the release system 3 and deploy the internal support.

[0077] While reducing the frictional force directly contacting the inner wall of the communication pipe 1, the ball bearing 203 can also transmit the mechanical displacement to the arc-shaped plate 602 when it is squeezed by the collapsed area and slightly displaced towards the inside of the pointed head 201, thereby accurately triggering subsequent chain actions; that is, the ball bearing 203 has a dual function. This integrated design simplifies the number of equipment execution components, eliminating the need for additional dedicated detection or transmission components. While improving the compactness of the equipment structure, it ensures the synchronization and reliability of the jacking repair and signal triggering.

[0078] In this invention, after the jacking component 2 completes the jacking repair of the collapsed part of the communication pipeline 1, the signal transmission component 6 outputs a trigger signal and drives the servo electric cylinder 303 to start; the servo electric cylinder 303 drives the plug 306 to disengage from the inner cavity of the plug hole 402 through the release system 3, releases the connection relationship between the connecting arm 401 and the release system 3, and simultaneously releases the limiting rod 502 from the limiting constraint on the second connecting pin 406.

[0079] Main references Figures 4 to 6 , Figure 10 , Figure 11As shown, it also includes a connecting assembly 7, which includes: a fixing rod 701, a sleeve 702, a positioning pin 703, and a driving component 704. One end of the fixing rod 701 is fixedly connected to the rear side wall of the crossbar 302; the sleeve 702 is fixedly installed on the other end of the fixing rod 701, and the sleeve 702 is configured as a hollow cylindrical structure; the positioning pin 703 is threaded through the outer wall of the sleeve 702 in the vertical direction; the driving component 704 is inserted into the inner cavity of the sleeve 702, and the positioning pin 703 is threaded through the outer wall of the driving component 704. The driving component 704 is pushed by the thrust to move the release system 3, the jacking assembly 2, and the inner support system 4 as a whole along the inner cavity of the communication pipe 1. After the end of the driving component 704 is inserted into the inner cavity of the sleeve 702, the positioning pin 703 is threaded through the sleeve 702 and the driving component 704, thereby achieving a locking connection of the end of the driving component 704 in the inner cavity of the sleeve 702.

[0080] The driving component 704 is the output end of an existing testing tool. The other end of the driving component 704 is connected to a commercially available power device with sufficient driving force. This power device can drive the jacking assembly 2, the release system 3, and the internal support system 4 to move along the inner cavity of the communication pipe 1, ensuring that the jacking assembly 2 can sufficiently push and restore the locally recessed areas of the communication pipe 1. For example, in this embodiment, the driving component 704 is specifically a fiberglass tube with a certain rigidity. This fiberglass tube is used in conjunction with a commercially available power device, which is a device for pushing and releasing the fiberglass tube. The universal power device releases and pushes the driving component 704. As the power device pushes the driving component 704 along the inner cavity of the communication pipe 1, it simultaneously drives the entire device to move along the inner cavity of the communication pipe 1, thereby realizing the detection of the pipe collapse location and trenchless repair work. The power unit and drive component 704 glass fiber tube are both existing mature technologies. In this solution, only the above-mentioned devices and components that can meet the functional requirements need to be used to achieve the purpose of driving the entire equipment to move along the inner cavity of the communication pipeline 1. The specific model, structure and parameters are not further limited or described here.

[0081] Furthermore, both the limiting block 415 and the second elastic element 601 are commercially available general-purpose elastic elements, consisting of a telescopic rod and a spring sleeved on the telescopic rod. The telescopic rod is a commonly used telescopic rod, consisting of two interlocking rod sections. Under external force, the total length of the telescopic rod can change. The spring, sleeved on the telescopic rod, deforms in the corresponding direction following the change in the length of the telescopic rod, and the spring force enables the telescopic rod to return to its original position without external force. The limiting block 415 and the second elastic element 601 only need to meet the usage requirements of this application; therefore, no specific model limitation or further description of the aforementioned existing components is provided here.

[0082] The working principle of the non-excavation repair device for partial collapse of communication pipelines in this embodiment is as follows:

[0083] The prefabricated and assembled jacking assembly 2, release system 3 and internal support system 4 are connected to the connecting assembly 7. The specific connection method is as follows: after inserting the end of the driving component 704 into the inner cavity of the sleeve 702, the positioning pin 703 is threaded through the sleeve 702 and the driving component 704 to lock and fix the end of the driving component 704 in the inner cavity of the sleeve 702.

[0084] This device is used in conjunction with a commercially available power device for driving the drive component 704: This device is compatible with a commercially available power device, which is used to release and push the drive component 704; as the power device drives the drive component 704 to move along the inner cavity of the communication pipeline 1, it simultaneously drives the entire device to move along the inner cavity of the communication pipeline 1, thereby simultaneously carrying out pipeline collapse location detection and trenchless repair work.

[0085] When the jacking assembly 2 moves to the partially collapsed area of ​​the communication pipeline 1, the ball bearing 203, which can rotate in place, contacts the collapsed part, replacing the pointed head 201 which directly contacts the collapsed part, effectively reducing the frictional resistance of the jacking assembly 2 during the jacking and repositioning process of the collapsed part; with the help of the pointed structure at the front end of the pointed head 201, the jacking and repositioning force can be smoothly applied to the partially collapsed part of the communication pipeline 1, and under the action of the external power equipment continuously driving the device to move forward, the repositioning and correction of the collapsed part of the communication pipeline 1 is completed; then the jacking assembly 2 continues to move forward, and the horizontal section 202 passes through the collapsed repair area of ​​the communication pipeline 1, forming a temporary transition support for the repaired pipeline part;

[0086] During the process of the ball bearing 203 pushing the collapsed part of the communication pipe 1 to reset, the ball bearing 203 is squeezed by the collapsed part and moves slightly towards the inner cavity of the pointed head 201. This displacement drives the arc-shaped piece 602 to squeeze the second elastic element 601 and cause it to compress and deform. The displacement of the arc-shaped piece 602 triggers the trigger switch sensor 603, which transmits a trigger signal to the servo cylinder 303. After the servo cylinder 303 is started under control, it drives the L-shaped connecting piece 304 to move and drives the two sets of drive rods 305 to move synchronously. The two sets of drive rods 305 drive the corresponding insert block 306 to move along the outer wall of the crossbar 302 towards the middle, so that the insert block 306 gradually disengages from the insertion hole 402. At this time, the two sets of insert blocks 306 gradually release the constraint on the corresponding connecting arm 401, realizing the separation and unlocking of the inner support system 4 and the release system 3, preparing for the subsequent expansion support of the arc-shaped inner support plate 413.

[0087] While the L-shaped connecting piece 304 drives the driving rod 305 to move, it simultaneously drives the connecting rod 501 and the limiting rod 502 to move in the direction of the output end of the servo cylinder 303, causing the connecting rod 501 to gradually move forward and break free from the limiting constraint on the second connecting pin 406. The second connecting pin 406, now free from its constraint, moves along the inner cavity of the first arc-shaped through groove 408 under the elastic tension of the tension spring 407, simultaneously driving the annular piece 409 to rotate counterclockwise along the inner cavity of the annular housing 403. During the counterclockwise rotation of the annular plate 409, multiple sets of third connecting pins 411 are driven to move outward along the inner cavity of the annular plate 409, while the moving arm 412 is driven to slide outward along the diameter of the annular shell 403. As the entire device continues to move along the inner cavity of the communication pipeline 1, when the jacking assembly 2 completes the jacking repair of the collapsed part and the entire internal support system 4 moves to the repair point, multiple sets of arc-shaped internal support plates 413 expand outward synchronously, and finally form a stable internal support at the collapsed repair part of the communication pipeline 1.

[0088] During the outward sliding of the movable arm 412 along the diameter of the annular housing 403, the inclined surface of the limiting block 415 in the inner cavity of the movable arm 412 is retracted into the inner cavity of the movable arm 412 by the squeezing action of the side wall of the annular housing 403. At this time, the first elastic element 414 is in a compressed state. When the movable arm 412 moves outward to the inner wall of the arc-shaped inner support plate 413 that is attached to the collapsed repair part of the communication pipe 1, the limiting block 415 is released from the constraint of the side wall of the annular housing 403 and extends outward from the side wall of the movable arm 412 under the elastic force of the first elastic element 414. This achieves the limiting engagement of the limiting block 415 with the outer wall of the annular housing 403, which can effectively prevent the movable arm 412 from moving towards the center of the annular housing 403 under the reverse force. This also achieves the locking and fixing of the arc-shaped inner support plate 413 in the support position, preventing the arc-shaped inner support plate 413 from retreating in the opposite direction and causing the support to fail.

[0089] This invention addresses the technical pain points in trenchless pipeline repair, such as secondary collapse, poor passability of curved pipe sections, and low levels of automation. It employs a jacking and internal support collaborative operation mechanism, an adaptive contraction and expansion configuration, and a multi-functional integrated design, achieving the following core technical benefits: Multiple sets of circumferentially arranged curved internal support plates 413 can contract normally and expand in place, effectively avoiding rigid interference with curved pipe sections and adapting to different pipe diameters without the need for prefabricated multi-specification linings, reducing equipment procurement and storage costs; after jacking repair is completed, the internal support system 4 is automatically triggered to form stable internal support, which, combined with a unidirectional limiting structure, provides long-term resistance to external stress, reducing the risk of secondary collapse from the source and ensuring the safe operation of communication cables; the multi-component synchronous radial expansion active internal support method, compared to traditional fixed lining passive support, can resist external stress through outward pushing force. The design balances external loads, adapts to irregular deformation caused by collapse, and provides longer-lasting and reliable support, fundamentally reducing the probability of secondary collapse. The linkage triggering and detachable connection design enables fully automated and continuous operation of the jacking, detachment, and internal support processes. Furthermore, the internal support system 4 is reusable, and the main equipment body is reused, significantly improving the automation level and engineering economy. The arc-shaped pointed head structure 201, the torsional misalignment layout of the ball bearings 203, and the integrated functional design enable comprehensive, blind-spot-free detection of pipeline collapse and low-friction jacking, optimizing equipment passability and operational accuracy. The inner diameter ratio design of the communication pipeline 1 and the annular shell 403, along with the narrow annular structure of the flat section 202, balances internal support stability with cable laying space, ensuring seamless connection between jacking and internal support actions, and comprehensively improving the engineering applicability and long-term reliability of trenchless repair.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A trenchless repair device for partial collapse of a communication pipeline, used for repairing partial collapse of a communication pipeline (1), characterized in that: include: The jacking component (2) has a gradually expanding structure from the front end to the rear end, and is used to jack and repair the collapsed part of the communication pipe (1); Release system (3) is provided in the cavity of the push assembly (2); An inner support system (4) is provided at the rear end of the jacking assembly (2), and the central axes of the inner support system (4) and the jacking assembly (2) are collinear with the central axis of the communication pipe (1). The release system (3) is used to connect the inner support system (4) and the jacking assembly (2). The release system (3) is controlled to release the inner support system (4) from the jacking assembly (2). The internal support system (4) includes: The arc-shaped inner support plate (413) is provided in multiple sets at equal intervals along the circumference. When the inner support system (4) is separated from the push assembly (2), the multiple sets of arc-shaped inner support plates (413) are linked to synchronously support the collapsed part of the communication pipe (1) outward. The internal support system (4) also includes: The connecting arm (401) has two sets arranged symmetrically on the left and right sides; A socket (402) is provided through the side wall of the connecting arm (401); The annular shell (403) is configured as a hollow annular shell structure, and the two sets of connecting arms (401) are respectively fixed and vertically installed on the front side wall of the annular shell (403); The first connecting pin (405) is fixedly installed on the front side wall of the annular housing (403); A first arc-shaped through groove (408) is formed through the front side wall of the annular shell (403), and the first arc-shaped through groove (408) has an arc-shaped structure, and the arc of the first arc-shaped through groove (408) is consistent with the arc of the side edge of the annular shell (403). The second connecting pin (406) slides through the inner cavity of the first arc-shaped through groove (408); A tension spring (407) is connected at both ends to the first connecting pin (405) and the second connecting pin (406) respectively, and is used to drive the second connecting pin (406) to move along the first arc-shaped through groove (408) towards the first connecting pin (405); The annular piece (409) is rotatably embedded in the inner cavity of the annular housing (403), and the rear end of the second connecting pin (406) is fixedly connected to the annular piece (409); The internal support system (4) also includes: The second arc-shaped through groove (410) is inclined in multiple sets along the circumference of the annular piece (409) and is equidistant along the circumference of the annular piece (409). Each set of the second arc-shaped through groove (410) is an arc-shaped structure. The third connecting pin (411) is slidably embedded in the inner cavity of each group of the second arc-shaped through grooves (410); The movable arm (412) is fixedly installed at the rear end of each group of the third connecting pins (411) and slides through the side wall of the annular housing (403) along the diameter direction of the annular housing (403). Each group of arc-shaped inner support plates (413) is fixedly installed at the free end of each group of the movable arm (412). The release system (3) includes: The mounting arm (301) is fixedly mounted on the rear side of the push assembly (2); A crossbar (302) is fixedly installed on the mounting arm (301) in the horizontal direction; A servo electric cylinder (303) is fixedly installed in the middle of the crossbar (302); The L-shaped connecting piece (304) is installed at the output end of the servo electric cylinder (303); Two sets of drive rods (305) are symmetrically arranged on the left and right sides with the output end of the servo electric cylinder (303) as the axis, and one end of each set of drive rods (305) is rotatably connected to the L-shaped connecting piece (304); Two sets of insert blocks (306) are symmetrically arranged about the center of the crossbar (302), and are respectively slidably sleeved on the crossbar (302). The other end of the drive rod (305) of each set is rotatably connected to the insert block (306). Two sets of springs (307) are provided, which are respectively sleeved on the crossbar (302) and their two ends are respectively fixedly connected to the side wall of the insert (306) and the mounting arm (301); In this case, the free end of each set of plugs (306) is respectively inserted into the inner cavity of each set of plug holes (402).

2. The non-excavation repair device for partial collapse of communication pipelines according to claim 1, characterized in that: Each set of the movable arms (412) is provided with an anti-reverse component, and each set of the anti-reverse component includes: The first elastic element (414) is fixedly installed at one end in the inner cavity of the movable arm (412); The limiting block (415) is fixedly installed at the other end of the first elastic member (414), and the limiting block (415) is configured as a wedge-shaped block structure that is narrow at the top and wide at the bottom, with its outer side wall configured as an inclined surface.

3. The non-excavation repair device for partial collapse of communication pipelines according to claim 1, characterized in that: An expansion port (404) is fixedly installed on the rear side of the annular housing (403), and the expansion port (404) is arranged to gradually expand from front to back.

4. The non-excavation repair device for partial collapse of communication pipelines according to claim 1, characterized in that: The pushing assembly (2) includes: The pointed head (201) is configured as a pointed head structure with an outwardly convex arc shape on the outer side wall; The flat section (202) is fixedly installed at the rear end of the pointed head (201) and is configured as a hollow annular structure with equal diameter; The ball bearings (203) are arranged in an arc shape and embedded in the side wall of the pointed head (201). Multiple rows of the ball bearings (203) are arranged equidistantly along the circumference of the side wall of the pointed head (201). Each row of ball bearings (203) is torsional and misaligned relative to the outer side wall of the pointed head (201).

5. The non-excavation repair device for partial collapse of communication pipelines according to claim 4, characterized in that: A linkage component (5) is provided between the release system (3) and the internal support system (4), the linkage component (5) comprising: The linkage rod (501) is fixedly installed at one end on the L-shaped connecting piece (304); The limiting rod (502) is fixedly installed on the rear end of the connecting rod (501), and the second connecting pin (406) has a hole for the limiting rod (502) to be inserted. When the limiting rod (502) is inserted into the hole cavity on the second connecting pin (406), the tension spring (407) is in a stretched state.

6. The non-excavation repair device for partial collapse of a communication pipeline according to claim 5, characterized in that: The inner cavity of the push assembly (2) is provided with multiple sets of signal transmission components (6), each set of signal transmission components (6) corresponds to the position of each row of balls (203), and each set of signal transmission components (6) includes: The mounting chamber (604) is fixedly installed on the inner wall of the pointed head (201), and together with the pointed head (201) inside the ball (203), they form a closed cavity; The second elastic element (601) is provided in multiple sets, and one end of the second elastic element (601) in each set is connected to the inner wall of the installation chamber (604); An arc-shaped piece (602) is connected to the other end of a plurality of second elastic members (601), and the arc-shaped piece (602) is configured as an arc-shaped structure. The curvature of the arc-shaped piece (602) is consistent with the curvature of the pointed head (201). The ball (203) rolls and fits against the side wall of the arc-shaped piece (602). A trigger switch sensor (603) is installed on the inner wall of the mounting chamber (604). When the ball (203) is pressed and moves toward the inner cavity of the pointed head (201), it drives the arc-shaped piece (602) to trigger the trigger switch sensor (603).

7. The non-excavation repair device for partial collapse of a communication pipeline according to claim 6, characterized in that: It also includes a connection component (7), which comprises: The fixed rod (701) is fixedly connected at one end to the rear side wall of the crossbar (302); A sleeve (702) is fixedly installed at the other end of the fixing rod (701), and the sleeve (702) is configured as a hollow cylindrical structure; The locating pin (703) is threaded through the outer wall of the sleeve (702) in the vertical direction; The drive component (704) is inserted into the inner cavity of the sleeve (702), and the positioning pin (703) is threaded through the outer wall of the drive component (704). The drive component (704) is pushed by the thrust to move the release system (3), the push assembly (2) and the inner support system (4) along the inner cavity of the communication pipe (1).

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