An underground pipeline dredging device

Abstract

The utility model belongs to pipeline dredging technical field, concretely relates to an underground pipeline dredging device, including cage, first traction part and second traction part, the cage periphery is provided with a plurality of helical rib along the length direction array, first traction part is arranged in cage one end, and first traction part end is rotationally provided with first lifting ring, second traction part is arranged in cage other end, and second traction part end is provided with second lifting ring, first traction part and second traction part structure are same, first traction part includes at least three connecting rib -to -plate, connecting rib -to -plate one end setting in the cage periphery, and the other end of connecting rib -to -plate is fixedly connected and is the end of conical structure, the taper angle of first traction part is less than the taper angle of second traction part.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline dredging technology, and more specifically, it relates to an underground pipeline dredging device. Background Technology

[0002] With the acceleration of urbanization, underground drainage pipe networks are becoming increasingly large. After long-term operation, they are prone to local or even large-scale blockages due to siltation, debris accumulation, tree root intrusion, etc., which seriously affect drainage function and pose a risk of urban flooding. Therefore, regular dredging and maintenance of underground pipes has become an important part of municipal engineering.

[0003] Currently, one common method of dredging is to use a traction-type dredging device. This type of device is generally a block or cylindrical structure with a lifting ring at the top. It can be lowered into the pipeline from the inspection well using a lifting device. During dredging, one end of a high-strength steel wire is connected to the lifting ring of the device, and the other end extends to the adjacent inspection well. A winch motor located in the well winds up the steel wire, thereby pulling the dredging device along the pipeline. It uses its own weight and shape to push or scrape away the silt accumulated at the bottom of the pipe to achieve the purpose of dredging.

[0004] However, in practical applications, traditional dredging devices still have many shortcomings. Their overall structure is simple, consisting only of a cylindrical structure that is pulled by steel wires. Therefore, their movement relies solely on the push of their weight, and the bottom is prone to sinking into soft mud, making traction difficult. Furthermore, their collection and dredging range is limited. However, if a mechanism with wheels or other active movement is added, problems such as complex structure and the wheels being easily covered by silt, causing them to become stuck and useless, will arise.

[0005] Therefore, in view of this, we will study and improve the existing structure and its shortcomings to provide an underground pipeline dredging device, in order to achieve a more practical purpose. Utility Model Content

[0006] In view of the problems mentioned in the background art above, this utility model provides an underground pipeline dredging device.

[0007] The technical solution adopted by this utility model is as follows: An underground pipeline dredging device includes a cage, a first traction part, and a second traction part. The outer periphery of the cage is provided with a plurality of spiral ribs arranged in an array along the length direction. The first traction part is located at one end of the cage, and a first lifting ring is rotatably provided at the end of the first traction part. The second traction part is located at the other end of the cage, and a second lifting ring is provided at the end of the second traction part. The first traction part and the second traction part have the same structure. The first traction part includes at least three connecting stiffeners. One end of each connecting stiffener is located on the outer periphery of the cage, and the other end of each connecting stiffener is fixedly connected to the end of a conical structure. The taper angle of the first traction part is smaller than that of the second traction part.

[0008] Furthermore, a first blade is fixedly provided in a spiral shape on the connecting rib plate located in the first traction part.

[0009] Furthermore, a blade holder shaft extending into the cage is rotatably mounted on the second traction unit, and a plurality of second blades are spirally arrayed on the blade holder shaft.

[0010] Furthermore, a collection net is provided at one end of the cage body located at the second traction part, and the knife holder shaft passes through the collection net and is located inside the cage body.

[0011] Furthermore, the collection net has an arc-shaped structure.

[0012] Furthermore, the end of the tool holder shaft has a tapered structure.

[0013] The beneficial effects of this utility model are:

[0014] 1. The spiral rib design on the outer periphery of the cage creates relative sliding friction between the inner wall of the pipe and the ribs when the dredging device is pulled along the pipeline by a steel wire. The spiral geometry causes this friction to be asymmetrically distributed in the circumferential direction, thus continuously generating torque around its central axis during the device's movement. This torque acts on the entire cage structure, causing it to rotate spontaneously without external drive. This passive rotation mechanism induced by the structure's own shape not only avoids the structural complexity and sludge blockage risk brought about by introducing active rotation mechanisms such as motors and gears, but also creates a screw-like conveying effect during rotation, gradually winding and concentrating loose linear impurities such as hair, fibers, and plastic strips into the gaps between the ribs, preventing them from diffusing again in the pipeline. This achieves the dual function of dredging and impurity collection. Furthermore, the rotational connection between the first lifting ring and the first traction unit is independent of the self-rotation function induced by the spiral ribs. The former eliminates harmful torsion, while the latter stimulates beneficial rotation. The two coexist without interference, ensuring the stable operation and structural durability of the device under complex working conditions.

[0015] 2. The ribs passively drive the continuous rotation of the cage, expanding the cutting coverage of the blades and transforming the dredging action from traditional linear pushing to circumferential dynamic cutting, significantly improving the ability to remove deposits from the pipe wall.

[0016] 3. A first cutting edge is fixedly arranged in a spiral shape on the connecting rib plate, working in synergy with the rotational motion of the cage induced by the aforementioned spiral ribs. When the device moves forward under traction and rotates due to friction between the ribs and the pipe wall, the spirally arranged first cutting edge continuously cuts into the blockage ahead in the circumferential direction. Its cutting direction changes continuously with rotation, thus forming a spiral cutting trajectory on the cross-section of the pipe. Compared with traditional straight-edged or point-like obstacle-breaking structures, this continuous spiral cutting mode can effectively cut through tough blockages such as tree roots and plastic films, preventing them from entangled in the front end of the device. At the same time, since the first cutting edge is attached to the conical connecting rib plate, its root has good rigid support and can withstand large local impact loads. Even when encountering gravel or hard blocks, it is not easily damaged. Moreover, the cutting edge is passively installed and does not rely on power drive. It is fully activated by the traction motion itself, which simplifies the structure and improves reliability in high humidity and high siltation environments. Attached Figure Description

[0017] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of the main view of this utility model;

[0019] Figure 2 This is a schematic diagram of the rear view of this utility model;

[0020] Figure 3 This is a schematic diagram of the tool holder shaft and the second traction unit of this utility model;

[0021] Figure 4 This is the front view of the present utility model;

[0022] The attached diagram is labeled as follows:

[0023] Cage body 1, connecting stiffener 11, first lifting ring 12, second lifting ring 13, collection net 14, rib 2, first blade 3, blade holder shaft 4, second blade 41. Detailed Implementation

[0024] like Figures 1-4 As shown, an underground pipeline dredging device includes a cage body 1, a first traction part, and a second traction part. The cage body 1 has a plurality of spiral ribs 2 arranged in an array along its length around its outer periphery. The first traction part is located at one end of the cage body 1, and a first lifting ring 12 is rotatably provided at the end of the first traction part. The second traction part is located at the other end of the cage body 1, and a second lifting ring 13 is provided at the end of the second traction part. The first traction part and the second traction part have the same structure. The first traction part includes at least three connecting stiffeners 11. One end of each connecting stiffener 11 is located around the outer periphery of the cage body 1, and the other end of each connecting stiffener 11 is fixedly connected to each other to form a tapered structure. The taper angle of the first traction part is smaller than that of the second traction part.

[0025] Using the above technical solution, the spiral ribs 2 on the outer periphery of the cage 1 are designed so that when the dredging device is pulled along the pipeline by the steel wire, relative sliding friction is generated between the inner wall of the pipeline and the ribs 2. The spiral geometry causes the friction force to be asymmetrically distributed in the circumferential direction, thereby continuously generating torque around its central axis during the device's movement. This torque acts on the entire cage 1 structure, causing it to rotate spontaneously without external drive. This passive rotation mechanism induced by the structure's own shape not only avoids the structural complexity and sludge blockage risk brought about by introducing active rotation mechanisms such as motors and gears, but also creates a screw-like conveying effect during the rotation of the spiral ribs 2. This gradually wraps around and concentrates loose linear impurities such as hair, fibers, and plastic strips in the gaps between the ribs 2, preventing them from diffusing again in the pipe. Thus, it has the dual functions of sludge removal and impurity collection. Furthermore, the rotational connection between the first lifting ring 12 and the first traction unit is independent of the self-rotation function induced by the spiral ribs 2. The former eliminates harmful torsion, while the latter stimulates beneficial rotation. The two coexist without interfering with each other, ensuring the stable operation and structural durability of the device under complex working conditions.

[0026] As a preferred embodiment, a first cutting edge 3 is spirally fixed on the connecting rib plate 11 located in the first traction section. The spirally fixed first cutting edge 3 on the connecting rib plate 11 works in conjunction with the rotational motion of the cage 1 induced by the aforementioned spiral rib 2. When the device moves forward under traction and rotates due to friction between the rib 2 and the pipe wall, the spirally arranged first cutting edge 3 continuously cuts into the blockage in front in the circumferential direction. Its cutting direction changes continuously with rotation, thereby forming a spiral cutting trajectory on the cross-section of the pipe. Compared with traditional straight-blade or point-like obstacle-breaking structures, this continuous spiral cutting mode can effectively cut off tough blockages such as tree roots and plastic film, preventing them from wrapping around the front end of the device. Meanwhile, since the first blade 3 is attached to the tapered connecting rib plate 11, its root rigidity is well supported and it can withstand large local impact loads. Even if it encounters gravel or hard blocks, it is not easy to break. Moreover, the blade is passively installed and does not rely on power drive. It fully utilizes the traction motion itself to activate its working state, which simplifies the structure and improves the reliability in high humidity and high siltation environments.

[0027] As a preferred embodiment, a cutter shaft 4 extending into the cage 1 is rotatably mounted on the second traction unit. The cutter shaft 4 has a plurality of second blades 41 arranged in a spiral pattern. The flowing material drives the cutter shaft 4 to rotate passively, and the spirally arranged second blades 41 subsequently shear and crush the impurities entering the cage 1. This is particularly effective for crushing soft and hard mixtures such as clumps of sludge and plant residues. Because the cutter shaft 4 is rotatably mounted rather than fixedly connected, its rotational freedom effectively alleviates torque accumulation caused by material jamming, preventing structural damage.

[0028] As a preferred embodiment, a collection net 14 is provided at one end of the cage 1 located at the second traction part, and the cutter shaft 4 passes through the collection net 14 and is located inside the cage 1; the collection net 14 has an arc-shaped structure. When the second blade 41 crushes the debris entering the cage 1, the resulting fine particles and incompletely cut fibrous materials continue to move backward under the action of flow inertia, while the arc-shaped collection net 14 forms a local deceleration zone with its curved surface structure, causing the particles to collide with the net surface and be captured due to changes in momentum; the arc-shaped design has a larger effective interception area and stronger anti-clogging ability compared to a flat net, and its curvature can guide the water flow along the surface, reducing the probability of impurities accumulating at the mesh. At the same time, the collection net 14 is located at the end of the cage 1 and works in conjunction with the cutter shaft 4, which can prevent the backflow of crushed materials and accommodate a certain volume of silt. In this design, the collection net 14 is preferably designed with a detachable structure such as a snap-fit, which is beneficial for later cleaning and maintenance.

[0029] As a preferred embodiment, the end of the cutter shaft 4 is tapered. The tapered design of the end of the cutter shaft 4 can guide the flow during rotation, guiding the crushed fine particles further into the cage 1 or out to the collection net 14 area, thereby improving the utilization rate of internal space and the cleanliness of sludge removal.

[0030] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A device for dredging underground pipelines, characterized in that: include The cage (1) has a plurality of spiral ribs (2) arranged in an array along the length direction on its outer periphery; The first traction part is located at one end of the cage (1), and a first lifting ring (12) is rotatably provided at the end of the first traction part; The second traction part is located at the other end of the cage (1), and a second lifting ring (13) is provided at the end of the second traction part; The first traction part and the second traction part have the same structure. The first traction part includes at least three connecting stiffeners (11). One end of the connecting stiffener (11) is disposed on the outer periphery of the cage (1), and the other end of the connecting stiffener (11) is fixedly connected to each other as the end of a tapered structure. The taper angle of the first traction part is smaller than that of the second traction part.

2. The underground pipeline dredging device according to claim 1, characterized in that: A first blade (3) is fixedly provided in a spiral shape on the connecting rib plate (11) of the first traction part.

3. The underground pipeline dredging device according to claim 1 or 2, characterized in that: The second traction part is rotatably provided with a knife holder shaft (4) that extends into the cage (1), and the knife holder shaft (4) has a plurality of second blades (41) arranged in a spiral pattern.

4. The underground pipeline dredging device according to claim 3, characterized in that: The cage (1) is provided with a collection net (14) at one end of the second traction part, and the knife holder shaft (4) passes through the collection net (14) and is located inside the cage (1).

5. The underground pipeline dredging device according to claim 4, characterized in that: The collection net (14) has an arc-shaped structure.

6. The underground pipeline dredging device according to claim 3, characterized in that: The end of the tool holder shaft (4) has a tapered structure.

Images