An inner lining structure for trenchless rehabilitation of a fractured pipe

Abstract

The utility model relates to pipeline repair technical field discloses a kind of lining structure of non-excavation repair of fragmentation pipe, including lining pipe and the installation assembly movable in lining pipe, installation assembly includes self-propelled assembly and extrusion assembly connected by support rod, self-propelled assembly includes connecting pipe and the steam nozzle on it, advance by backwardly spraying steam drive device, extrusion assembly includes mounting column, motor, gear, rack, ejector rod and arc extrusion plate, motor drives ejector rod by gear rack, make arc extrusion plate extrude lining pipe outward, multiple ball bearings are equipped on arc extrusion plate, and rolling contact is formed with lining pipe inner wall.The utility model realizes self-propelled by steam nozzle, and external traction is got rid of, and repair is assisted using steam heat energy, and simultaneously, sliding friction when extruding is changed to rolling friction by the design of ball bearing, significantly reduce the moving resistance, ensure the uniform stability of extrusion, effectively improve repair quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, and in particular to an inner lining structure for trenchless repair of fractured pipes. Background Technology

[0002] Urban underground drainage and sewage pipes are vital infrastructure for maintaining the normal operation of cities. As they age, these pipes are prone to problems such as aging, cracking, and leakage. Traditional methods of excavating roads for pipe replacement or repair are not only large-scale and costly, but also severely impact urban traffic and residents' lives. Therefore, trenchless repair technologies, especially the method of using resin-impregnated flexible hoses for lining repair, have become the mainstream technology for pipe repair.

[0003] During the lining repair process, a flexible liner needs to be inserted into the old pipe to be repaired. Specific equipment moves the liner inside while applying pressure outwards, ensuring a tight fit between the liner and the inner wall of the old pipe. After the resin cures, a strong new inner wall is formed. Currently, repair equipment used to achieve this process typically relies on external traction devices such as winches for forward propulsion and uses an onboard compression mechanism to apply pressure to the liner.

[0004] However, this traditional method has a core technical contradiction. To eliminate the gap between the liner and the old pipe and ensure repair quality, the extrusion mechanism must apply sufficiently high pressure to the inner wall of the liner. This enormous pressure inevitably generates significant sliding friction between the repair equipment and the inner wall of the liner. This friction not only places high demands on the power of the external traction equipment, but more importantly, it causes the equipment's movement within the pipe to become intermittent and unstable, prone to jamming, especially when the pipe has bends or uneven inner walls. This unstable movement directly affects the uniformity and continuity of the extrusion bonding, easily creating "void" between the liner and the old pipe, severely reducing the repair effect and the service life of the new pipe.

[0005] Therefore, this utility model proposes an inner lining structure for trenchless repair of fractured pipes to address the shortcomings of existing technologies. Utility Model Content

[0006] In the existing technology, the lining structure for trenchless repair of fractured pipes relies on external traction during the repair process, and the huge friction generated when the extrusion mechanism applies high pressure to the lining causes unstable equipment movement and easy jamming, resulting in uneven fit between the lining and the original pipe and voids. This utility model aims to provide a lining structure for trenchless repair of fractured pipes with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a lining structure for trenchless repair of fractured pipes, including a lining pipe and an installation assembly that can move along the axial direction of the lining pipe. The installation assembly includes a self-propelled assembly and a compression assembly fixedly connected by a support rod.

[0008] The self-propelled assembly includes a steel pipe and a connecting pipe rotatably connected to one end of the steel pipe via a bearing. At least one steam nozzle is uniformly fixedly connected to the outer peripheral wall of the connecting pipe, and the end of the connecting pipe away from the steel pipe is fixedly connected to one end of the support rod.

[0009] Furthermore, the extrusion assembly includes a mounting column, which is fixedly connected to the other end of the support rod. A motor is fixedly connected inside the mounting column, and a gear is fixedly connected to the output end of the motor. Two push rods are slidably connected to the mounting column, and a rack is formed on the push rod to mesh with the gear. An arc-shaped extrusion plate is fixedly connected to one end of the push rod, and multiple ball bearings are rotatably mounted on the side of the arc-shaped extrusion plate facing the inner wall of the liner.

[0010] Preferably, a limiting block is fixedly connected to the side of the top rod near the mounting column; the mounting column is provided with a T-shaped limiting groove that is slidably connected to the limiting block.

[0011] Preferably, the side wall of the mounting column is provided with a mounting groove for accommodating the motor.

[0012] Preferably, the two top rods are arranged symmetrically along the radial direction of the mounting post.

[0013] Preferably, the nozzle of the steam nozzle is tilted toward the steel pipe.

[0014] More preferably, the angle between the axis of the steam nozzle and the axis of the connecting pipe is greater than 100°.

[0015] Preferably, three steam nozzles are uniformly fixedly connected to the outer peripheral wall of the connecting pipe.

[0016] Preferably, the present invention further includes a steam guide pipe, which is connected to the end of the steel pipe away from the connecting pipe. This utility model has the following beneficial effects: 1. This utility model solves the problems of existing repair devices relying on external equipment for traction, being inconvenient to move, and being unable to actively heat the repair slurry by setting a steam nozzle that sprays high-temperature steam at an angle to the rear. It achieves the technical effects of the device being self-propelled, adapting to complex pipeline routes, and using steam heat energy to improve the fluidity and curing speed of the slurry.

[0017] 2. This utility model solves the problems of difficult equipment movement due to excessive sliding friction resistance and easy hollowing due to uneven pressure by setting an arc-shaped extrusion plate symmetrically pushed by a gear and rack mechanism driven by a motor, and setting ball bearings on the outside of the arc-shaped extrusion plate. It achieves the technical effect of low resistance and stable movement under continuous extrusion, and uniform pressure is applied to the liner tube in all directions to ensure tight fit.

[0018] 3. This utility model integrates the steam self-propelled component and the ball extrusion component into a whole, and adopts a stable guiding structure of limit block and limit groove. It solves the problems of complex structure, unstable collaborative operation and easy displacement of extrusion components in traditional split equipment. It achieves the technical effect of compact structure, high functional integration and stable and reliable operation, and significantly improves the automation level and repair quality of repair operations. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the lining structure for trenchless repair of fractured pipes proposed in this utility model. Figure 2 This is a schematic diagram of the steam nozzle structure of the lining structure for trenchless repair of fractured pipes proposed in this utility model. Figure 3 This is a schematic diagram of the installation column of the lining structure for trenchless repair of fractured pipes proposed in this utility model. Figure 4 This is a schematic diagram of the extrusion assembly for a trenchless repair lining structure of a fractured pipe, as proposed in this utility model.

[0020] Legend: 1. Liner; 2. Steel pipe; 3. Steam nozzle; 4. Steam guide pipe; 5. Connecting pipe; 6. Support rod; 7. Mounting column; 8. Top rod; 9. Arc-shaped extrusion plate; 10. Ball bearing; 11. Mounting groove; 12. Motor; 13. Gear; 14. Rack; 15. Limiting block; 16. Limiting groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Example: Please refer to Figures 1 to 4This utility model provides a lining structure for trenchless repair of broken pipes, which aims to solve the problems of existing trenchless repair devices for broken pipes relying on external equipment for traction, inconvenient movement, and uneven fit between the lining tube 1 and the original pipe due to high frictional resistance during compression.

[0023] like Figure 1 As shown, the trenchless repair lining structure for fractured pipe includes a liner 1 and an installation assembly that can move axially along the liner 1. The installation assembly includes a self-propelled assembly and a pressing assembly fixedly connected by a support rod 6. The self-propelled assembly is used to drive the entire installation assembly to move inside the liner 1, and the pressing assembly is used to press the liner 1 outward to make it tightly adhere to the inner wall of the original pipe. The self-propelled assembly includes a steel pipe 2 and a connecting pipe 5 rotatably connected to one end of the steel pipe 2 via a bearing. At least one steam nozzle is uniformly fixedly connected to the outer peripheral wall of the connecting pipe 5. 3. The end of the connecting pipe 5 away from the steel pipe 2 is fixedly connected to one end of the support rod 6. The extrusion assembly includes a mounting column 7, which is fixedly connected to the other end of the support rod 6. A motor 12 is fixedly connected inside the mounting column 7, and a gear 13 is fixedly connected to the output end of the motor 12. Two push rods 8 are slidably connected on the mounting column 7. A rack 14 that meshes with the gear 13 is formed on the push rod 8. An arc-shaped extrusion plate 9 is fixedly connected to one end of the push rod 8. Multiple balls 10 are rotatably installed on the side of the arc-shaped extrusion plate 9 facing the inner wall of the liner tube 1.

[0024] To solve the above-mentioned technical problems, the core of the technical solution of this embodiment lies in the specific structural fit and transmission relationship of the extrusion assembly, which can extrude the liner 1 stably and uniformly in a low-resistance manner.

[0025] Reference Figure 3 and Figure 4 The core structure of the extrusion assembly will be described in detail below: The mounting column 7 serves as the base of the extrusion assembly. It has a T-shaped limiting groove 16 that slides through the push rod 8. Two push rods 8 are symmetrically arranged radially along the mounting column 7, and each push rod 8 has a limiting block 15 fixedly connected to its side near the mounting column 7. In the assembled state, the limiting block 15 of the push rod 8 slides within the limiting groove 16 of the mounting column 7. This sliding fit structure between the limiting block 15 and the limiting groove 16 ensures high stability and anti-deflection capability during the symmetrical reverse linear movement of the push rod 8 along the mounting column 7. The side wall of the mounting column 7 also has a mounting groove 11 for accommodating the motor 12. The motor 12 is fixedly connected inside the mounting groove 11, and the output end of the motor 12 is fixedly... A drive gear 13 is fixedly connected to the push rod 8, corresponding to the drive of the motor 12. Each push rod 8 has a rack 14 that meshes with the gear 13. When the motor 12 is working, the gear 13 rotates and drives the racks 14 on the two push rods 8 respectively, thereby accurately converting the rotational motion of the motor 12 into the symmetrical linear motion of the two push rods 8. An arc-shaped extrusion plate 9 is fixedly connected to the end of the push rod 8 away from the gear 13. The arc-shaped extrusion plate 9 can evenly distribute the extrusion force transmitted from the push rod 8 to the inner wall of the liner 1. In order to further reduce the frictional resistance during movement, multiple balls 10 are rotatably installed on the side of the arc-shaped extrusion plate 9 facing the inner wall of the liner 1. The balls 10 form rolling contact with the inner wall of the liner 1.

[0026] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, in order to achieve the self-propelled function of the device and provide a favorable working environment for subsequent extrusion, please refer to... Figure 1 and Figure 2 The steam nozzle 3 in the self-propelled assembly is tilted towards the steel pipe 2, and generates a reaction force by spraying high-temperature steam backward, providing continuous and stable forward power for the entire installation assembly.

[0027] As a preferred implementation, in order to obtain better propulsion effect, the angle between the axis of the steam nozzle 3 and the axis of the connecting pipe 5 is greater than 100 degrees. This large-angle tilt design helps to maximize the axial force and improve propulsion efficiency.

[0028] As another preferred embodiment, in order to make the propulsion force uniform and stable, three steam nozzles 3 are uniformly fixedly connected to the outer peripheral wall of the connecting pipe 5. The three steam nozzles 3 are evenly distributed along the circumference of the connecting pipe 5 to ensure that the installation component will not deflect or swing due to uneven force during the forward movement.

[0029] In another preferred embodiment, in order to facilitate the delivery of high-temperature steam from the outside to the inside of the device, a steam guide pipe 4 is also included. The steam guide pipe 4 is connected to the end of the steel pipe 2 away from the connecting pipe 5. The external steam generating equipment delivers high-temperature steam to the inside of the steel pipe 2 continuously through the steam guide pipe 4.

[0030] The working principle of the lining structure for trenchless repair of fractured pipes in this utility model is as follows: When the repair operation is started, the external steam generator delivers high-temperature steam to the steel pipe 2 through the steam pipe 4. The steam is conducted through the steel pipe 2 to the connecting pipe 5 at the end, which is rotatably connected by the bearing, and then diverted to the steam nozzle 3 on the outside of the connecting pipe 5. The steam nozzle 3 sprays high-temperature steam backward at an inclined angle. The reaction force generated by the steam impacting the inner wall of the liner 1 pushes the connecting pipe 5 and drives the entire installation assembly to move forward stably along the inside of the liner 1 through the support rod 6. At the same time, the high-temperature steam can improve the fluidity of the repair slurry on the outside of the liner 1.

[0031] When the mounting assembly is moved to the repair position or during the movement, the motor 12 installed in the mounting slot 11 of the mounting column 7 is activated. The motor 12 drives the gear 13 at the end to rotate. The gear 13 meshes with the rack 14 on the opposite side of the two push rods 8, causing the two push rods 8 to move symmetrically in opposite directions along the mounting column 7. During this process, the limiting block 15 on the push rod 8 slides in the T-shaped limiting slot 16 of the mounting column 7, ensuring the stability and accuracy of the movement of the push rod 8. The push rod 8 then pushes the arc-shaped extrusion plate 9 to press against the liner tube 1 outward.

[0032] Finally, the entire installation assembly moves slowly under steam drive. Multiple balls 10 on the outer side of the arc-shaped extrusion plate 9 form rolling contact with the inner wall of the liner 1, which greatly reduces the frictional resistance of the installation assembly when it moves forward under extrusion. The balls 10 continue to roll and work with the arc-shaped extrusion plate 9 to apply pressure evenly to the liner 1 from all directions. With the help of high-temperature steam to solidify the slurry, the liner 1 is firmly attached to the original pipeline. Through the synergistic effect of the self-propelled assembly and the extrusion assembly, this utility model solves the problem in the prior art that the repair device relies on external traction and the uneven attachment caused by high frictional resistance.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A liner structure for trenchless repair of fractured pipes, comprising a liner (1) and an mounting assembly movable axially along the liner (1); characterized in that, The mounting assembly includes a self-propelled assembly and an extrusion assembly fixedly connected by a support rod (6); The self-propelled assembly includes a steel pipe (2) and a connecting pipe (5) rotatably connected to one end of the steel pipe (2) via a bearing. At least one steam nozzle (3) is uniformly fixedly connected to the outer peripheral wall of the connecting pipe (5). The end of the connecting pipe (5) away from the steel pipe (2) is fixedly connected to one end of the support rod (6). The extrusion assembly includes a mounting column (7), which is fixedly connected to the other end of the support rod (6). A motor (12) is fixedly connected inside the mounting column (7), and a gear (13) is fixedly connected to the output end of the motor (12). Two push rods (8) are slidably connected on the mounting column (7). A rack (14) that meshes with the gear (13) is formed on the push rod (8). An arc-shaped extrusion plate (9) is fixedly connected to one end of the push rod (8). Multiple balls (10) are rotatably mounted on the side of the arc-shaped extrusion plate (9) facing the inner wall of the liner (1).

2. The lining structure for trenchless repair of fractured pipes according to claim 1, characterized in that, The top rod (8) is fixedly connected to a limiting block (15) on the side near the mounting post (7); the mounting post (7) is provided with a T-shaped limiting groove (16) that is slidably connected to the limiting block (15).

3. The lining structure for trenchless repair of fractured pipes according to claim 1 or 2, characterized in that, The mounting column (7) has a mounting groove (11) on its side wall for accommodating the motor (12).

4. The lining structure for trenchless repair of fractured pipes according to claim 1, characterized in that, The two top rods (8) are arranged radially symmetrically along the mounting post (7).

5. The lining structure for trenchless repair of fractured pipes according to claim 1, characterized in that, The nozzle of the steam nozzle (3) is tilted toward the steel pipe (2).

6. The lining structure for trenchless repair of fractured pipes according to claim 5, characterized in that, The angle between the axis of the steam nozzle (3) and the axis of the connecting pipe (5) is greater than 100°.

7. The lining structure for trenchless repair of fractured pipes according to claim 1, characterized in that, Three steam nozzles (3) are uniformly fixedly connected to the outer peripheral wall of the connecting pipe (5).

8. The lining structure for trenchless repair of fractured pipes according to claim 1, characterized in that, It also includes a steam pipe (4), which is connected to the end of the steel pipe (2) away from the connecting pipe (5).

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