Non-excavation spraying repair equipment for inner wall of pipeline

Abstract

The utility model provides a pipeline inner wall trenchless spraying repair equipment, including fixed connection in support rotatory atomizer and drive motor, the outer periphery of support is connected with three axial sliding skids, and the periphery of each sliding skid is equipped with the extension sliding frame correspondingly, and the extension sliding frame is fixed with screw sleeve and guide rod, and the guide rod inserts the corresponding guide through -hole on the sliding skid and cooperates, the center of support is arranged with the rotating shaft with hand wheel, bevel gear is connected on the rotating shaft, and three bevel gears with screw rod are all engaged with bevel gear, and the end of each screw rod passes through the corresponding sliding skid and is connected the screw sleeve on the corresponding extension sliding frame, forms the support radius hand -operated adjustment type outer -hanging extension sliding device, the utility model can utilize the sliding skid and touch the pipeline inner wall, and repair small -bore pipeline, also can install the outer -hanging extension sliding device, utilize the hand -operated adjustment support radius, the range of the pipeline diameter that adapts is big, makes the rotatory atomizer keep on the pipeline center axis, guarantees the repair effect.

Description

[0001] Technical Field: This invention relates to a device for repairing the inner walls of various underground water supply and drainage pipes by spraying slurry.

[0002] Background Technology: When internal damage and leakage occur in pipelines, especially underground pipelines, excavation and repair are time-consuming, labor-intensive, and significantly disrupt road traffic. Trenchless pipeline wall repair equipment has emerged, which allows a rotary sprayer to be inserted into the pipeline and moved while simultaneously spraying various cementitious slurries onto the inner wall for repair. To ensure uniform spraying repair, the rotary sprayer needs to be kept as close as possible to the pipeline's central axis. Existing spraying repair equipment uses two or three fixed sliding skids connected to the outer perimeter of a support frame to press against the inner wall of the pipeline. While the structure is simple, it cannot flexibly adapt to pipelines of various diameters.

[0003] Summary of the Invention: In view of the shortcomings of the prior art, the present invention provides a pipe inner wall spraying repair device with a reasonable structure and convenient adjustment of support dimensions.

[0004] This invention includes a rotary sprayer and a corresponding drive motor fixedly connected in a bracket. Three axial sliding skids are connected to the outer periphery of the bracket. Each sliding skid is equipped with an extension sliding frame. A screw sleeve and a guide rod are fixed on the extension sliding frame. The guide rod is inserted into the corresponding guide through hole on the sliding skid. A rotating shaft with a handwheel is arranged at the center of the bracket. A large bevel gear is connected to the rotating shaft. Three small bevel gears, each connected to a screw, mesh with the large bevel gear. The end of each screw passes through the corresponding sliding skid and is connected to the screw sleeve on the corresponding extension sliding frame, forming a hand-cranked adjustable external extension sliding device.

[0005] This invention, without the external extension sliding device, utilizes a sliding skid plate against the inner wall of the pipe, resulting in a small support radius, suitable for repairing small-diameter pipes. With the external extension sliding device installed, the support radius can be manually adjusted as needed, adapting to a wide range of pipe diameters and ensuring the spray gun remains as close to the pipe's central axis as possible, guaranteeing uniform lining thickness after pipe repair. Furthermore, this invention has a rational structure, is easy to assemble and adjust, and offers high reliability.

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0007] Attached image description: Figure 1 This is the front view of the embodiment.

[0008] Figure 2 yes Figure 1 Top view.

[0009] Figure 3 yes Figure 1 The left view.

[0010] Figure 4 This is a three-dimensional schematic diagram of an embodiment.

[0011] Figure 5 This is an exploded perspective view of an embodiment.

[0012] Figure 6 This is a 3D view of the vehicle without any external extended gliding devices installed.

[0013] Figure 7 This is a schematic diagram of another form of extended skid.

[0014] Detailed implementation methods: such as Figures 1 to 5 As shown, a rotary sprayer 2 and a corresponding drive motor 3 are fixedly connected to the bracket 1. Three axial sliding skids 4 are connected to the outer periphery of the bracket 1. Each sliding skid 4 is equipped with an extension sliding frame 5. A screw sleeve 6 and a guide rod 7 are fixed on the extension sliding frame 5, and the guide rod 7 is inserted into the corresponding guide through hole 8 on the sliding skid 4. A rotating shaft 9 with a handwheel 10 is arranged at the center of the bracket 1. A large bevel gear 11 is connected to the rotating shaft 9, and three small bevel gears 12, each connected to a screw 13, mesh with the large bevel gear 11. The end of each screw 13 passes through the corresponding sliding skid 4 and connects to the screw sleeve 6 on the corresponding extension sliding frame 5, forming a hand-cranked adjustable external extension sliding device.

[0015] In practice, the drive motor 3 can be a pneumatic motor or an electric motor as required. Since the entire device is displaced by external traction, traction rings 16 can generally be fixed at both ends of the bracket 1 for ease of use.

[0016] When the pipe diameter is small, there is no need to install an external extension sliding device, such as Figure 6 As shown, the entire device can be supported and slidably engaged in the pipeline by each sliding skid 4 against the inner wall of the pipeline. The device is pulled and displaced along the pipeline, and the drive motor 3 drives the rotary sprayer 2 to rotate. The slurry input through the hose is evenly centrifugally sprayed onto the inner wall of the pipeline for spraying repair.

[0017] When used in larger diameter pipelines, an external extension sliding device needs to be installed, such as... Figure 5 As shown, the entire device is supported and slides against the inner wall of the pipeline by various extended sliding frames 5. Each extended sliding frame 5 is typically equipped with a roller 14 as a wall-rolling component. A shock-absorbing spring 15 is usually installed between the roller 14 and the extended sliding frame 5, resulting in smoother and more stable displacement. Many pipelines have corrugated inner walls, and the extended sliding frames 5 can also be designed with... Figure 7 As shown, the extended sliding frame 5 is a slender cylindrical shape with both ends curving upwards, resulting in a small vibration amplitude during traction displacement.

[0018] When the support radius of the external extended sliding device needs to be adjusted, the handwheel 10 is turned to make the rotating shaft 9 and the large bevel gear 11 rotate. The three small bevel gears 12 are rotated at the same time, and each screw 13 rotates accordingly, which pushes the corresponding screw sleeve 6. The guide rod 7 and the guide through hole 8 cooperate to prevent the extended sliding frame 5 from twisting. In this way, the three extended sliding frames 5 can be adjusted radially in sync to adapt to different pipe diameters.

Claims

1. A trenchless spraying repair device for the inner wall of a pipeline, comprising a rotary sprayer fixedly connected in a support and a corresponding drive motor, wherein three axial sliding skids are connected to the outer periphery of the support, characterized in that: Each sliding skid (4) is equipped with an extension sliding frame (5) on its periphery. The extension sliding frame (5) is fixed with a screw sleeve (6) and a guide rod (7). The guide rod (7) is inserted into the corresponding guide through hole (8) on the sliding skid (4). A rotating shaft (9) with a handwheel (10) is arranged in the center of the bracket (1). A large bevel gear (11) is connected to the rotating shaft (9). Three small bevel gears (12) connected to screws (13) mesh with the large bevel gear (11). The end of each screw (13) passes through the corresponding sliding skid (4) and is connected to the screw sleeve (6) on the corresponding extension sliding frame (5), forming a support radius hand-crank adjustable external extension sliding device. Traction rings (16) are fixed at both ends of the bracket (1).

2. The non-excavation spraying repair equipment for pipeline inner walls according to claim 1, characterized in that: The drive motor (3) can be a pneumatic motor or an electric motor.

3. The non-excavation spraying repair equipment for the inner wall of a pipeline according to claim 1 or 2 is characterized in that: the extended sliding frame (5) is a flat and long strip shape, and each extended sliding frame (5) is equipped with a roller (14) as a wall-touching rolling component.

4. The non-excavation spraying repair equipment for pipeline inner walls according to claim 3, characterized in that: A shock-absorbing spring (15) is provided between the roller (14) and the extended slide frame (5).

5. The trenchless spraying repair equipment for the inner wall of pipelines according to claim 1 or 2, characterized in that: The extended slide frame (5) is a long, thin cylindrical tube with upturned ends.

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