A high-pressure dredging device for municipal pipelines

Abstract

The application discloses a kind of municipal pipeline high-pressure dredging device.Belongs to municipal pipeline dredging equipment technical field, the structure can realize the rotation cutting of hydraulic drive drill bit hard object, and when meeting resistance, automatically extend scraper to carry out radial obstacle removal, to effectively improve dredging efficiency and passability.A kind of municipal pipeline high-pressure dredging device, characterized in that, including: spray head, fixedly connected with the backplate on the spray head;Drill bit, drill bit is set to the outside of spray head, drill bit and spray head axial sliding connection, the end of drill bit is provided with first water outlet hole;The inside of drill bit is provided with second water outlet hole;Telescopic scraper assembly, telescopic scraper assembly is fixedly connected to the outer wall of drill bit, the end of telescopic scraper assembly is through touching backplate, realize telescopic scraper assembly along the direction perpendicular to drill bit axis extension.

Description

Technical Field

[0001] This invention relates to the field of municipal pipeline dredging equipment technology, specifically a high-pressure dredging device for municipal pipelines. Background Technology

[0002] Over time, municipal drainage pipes are prone to accumulating complex blockages composed of grease, silt, tree roots, and cement scale. Existing high-pressure cleaning devices primarily rely on high-pressure water jets for flushing and cleaning, which is effective for soft deposits. However, when faced with hard blockages such as tree roots, hardened sand and gravel, or cement lumps, the water jets are insufficient to break them up effectively, often requiring repeated operations or even replacement of other equipment. Furthermore, traditional nozzles advance within the pipe solely through the thrust of the hose at the rear. When encountering pipe diameter changes, misaligned joints, or large obstacles, the nozzles are prone to jamming. Once jammed, the pump must be stopped and the nozzles pulled back, severely impacting cleaning efficiency. Some devices have attempted to use electric or pneumatic motors to drive the drill bit, but the damp and confined underground pipe environment limits the use of external power, and the devices are complex in structure and have poor reliability. Therefore, there is an urgent need to develop a high-pressure cleaning device that requires no additional power source and can adaptively expand its diameter to clear obstructions.

[0003] Therefore, there is an urgent need to develop a high-pressure dredging device for municipal pipelines to solve the problems in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide a high-pressure dredging device for municipal pipelines, which enables a hydraulically driven drill bit to rotate and cut hard objects, and automatically extends a scraper to clear obstructions radially when encountering resistance, thereby effectively improving dredging efficiency and throughput. Furthermore, it features a simple structure and is easy to use, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-pressure dredging device for municipal pipelines, characterized in that it comprises: The nozzle has a fixed support plate attached to it. The drill bit is fitted onto the outside of the nozzle and is axially slidably connected to the nozzle. A first water outlet hole is opened at the end of the drill bit, and a second water outlet hole is opened inside the drill bit. The telescopic scraper assembly is fixedly connected to the outer wall of the drill bit. The end of the telescopic scraper assembly extends in a direction perpendicular to the drill bit axis by touching the stop plate.

[0006] By adopting the above technical solution, when the drill bit encounters an obstruction, it slides axially relative to the nozzle, and the end of the telescopic scraper assembly touches the stop plate and extends in a direction perpendicular to the drill bit axis to radially remove the blockage.

[0007] As a further aspect of the present invention: a first sliding ring and a second sliding ring are fixedly connected at the connection between the nozzle and the drill bit, and a third sliding ring is fixedly connected to the drill bit, with the first sliding ring and the third sliding ring being slidably connected.

[0008] By adopting the above technical solution, the first sliding ring and the third sliding ring are slidably connected to achieve axial sliding guidance between the drill bit and the nozzle.

[0009] As a further aspect of the present invention: a limiting ring is fixedly connected to the nozzle, and a first spring is fixedly connected to the limiting ring, the first spring also abutting against the inside of the drill bit.

[0010] By adopting the above technical solution, the limiting ring fixes the first spring, and the first spring abuts against the inside of the drill bit, pushing the drill bit to reset when there is no external force on the drill bit.

[0011] As a further aspect of the present invention: a telescopic tube is fixedly connected to the first water outlet, the telescopic tube slides into the interior of the nozzle and communicates with the inner cavity of the nozzle; a water guide cone ring is fixedly connected to the water outlet of the nozzle, and the outlet of the water guide cone ring faces the second water outlet.

[0012] By adopting the above technical solution, the telescopic tube keeps the first water outlet hole connected to the nozzle cavity, and the water guide cone ring directs the water flow to the second water outlet hole.

[0013] As a further aspect of the present invention: the second water outlet is triangular in shape, and multiple second water outlets are provided inside the drill bit, so that the water discharged from the water guide cone ring drives the drill bit to rotate.

[0014] By adopting the above technical solution, the triangular second water outlet hole converts the water flow guided by the water guide cone ring into tangential force, driving the drill bit to rotate.

[0015] As a further aspect of the present invention: the telescopic scraper assembly includes: a housing, a telescopic rod, a connecting rod assembly, and a scraper rod; The outer casing is fixedly connected to the outside of the drill bit; the telescopic rod is slidably connected to the inside of the outer casing, with one end of the telescopic rod facing the back plate and the other end fixedly connected to the inside of the outer casing via a second spring.

[0016] By adopting the above technical solution, the telescopic rod slides inside the housing, and the second spring provides a restoring force, which drives the connecting rod assembly to extend or retract the scraper rod.

[0017] As a further embodiment of the present invention: the linkage assembly includes: a first fixing plate, a second fixing plate, and a folding rod; The first fixing plate is fixedly connected to the outer shell; the second fixing plate is fixedly connected to the telescopic rod; the scraper rod is rotatably connected to the second fixing plate; one end of the folding rod is fixedly connected to the first fixing plate, and the other end is fixedly connected to the scraper rod.

[0018] By adopting the above technical solution, the first fixing plate and the scraper rod are connected to both ends of the folding rod respectively, so that the axial movement of the telescopic rod is converted into the radial movement of the scraper rod.

[0019] As a further aspect of the present invention: a blade holder is fixedly connected to the outer casing, the blade holder abuts against the scraper rod, and the blade holder is located at one end of the outer casing near the first water outlet.

[0020] Compared with the prior art, the beneficial effects of the present invention are: through the axial sliding connection between the high-pressure nozzle and the drill bit and the linkage design of the telescopic scraper assembly, the scraper automatically extends to perform radial clearing when the drill bit encounters obstruction. Compared with the prior art, automatic clearing can be achieved without additional power, thus improving the clearing efficiency and passability. Other features and advantages of the present invention will be disclosed in detail in the following detailed description and accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is a side view of an embodiment of the present invention; Figure 3 This is a side cross-sectional view in an embodiment of the present invention.

[0022] The figures are labeled as follows: 1. Nozzle; 11. Support plate; 12. First sliding ring; 13. Second sliding ring; 14. Limiting ring; 15. First spring; 16. Water guide cone ring; 2. Drill bit; 21. First water outlet; 211. Telescopic pipe; 22. Second water outlet; 23. Third sliding ring; 3. Telescopic scraper assembly; 31. Housing; 311. Scraper holder; 32. Telescopic rod; 321. Second spring; 33. Linkage assembly; 331. First fixing plate; 332. Second fixing plate; 333. Folding rod; 34. Scraper rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1 to 3 As shown, a high-pressure dredging device for municipal pipelines includes a nozzle 1, a drill bit 2, and a telescopic scraper assembly 3.

[0025] The nozzle 1 is cylindrical, and its rear end is connected to an external high-pressure pump station via a high-pressure hose. A backing plate 11 is fixedly connected to the outer wall of the nozzle 1. The backing plate 11 is an annular plate or a plurality of protrusions distributed circumferentially, for contacting the end of the telescopic scraper assembly 3. A water guide cone ring 16 is fixedly connected inside the water outlet at the front end of the nozzle 1, and the outlet of the water guide cone ring 16 faces the second water outlet 22 of the drill bit 2.

[0026] The drill bit 2 is a hollow sleeve structure, fitted onto the outer front end of the nozzle 1 and axially slidably connected to the nozzle 1. A first water outlet 21 is provided at the very front end of the drill bit 2 for spraying high-pressure water forward to break up blockages. Multiple second water outlets 22 are obliquely formed on the circumferential sidewalls or inside of the drill bit 2. In this embodiment, the cross-sectional shape of the second water outlets 22 is triangular, and they are evenly distributed along the circumference of the drill bit 2, with a number of 4 to 8.

[0027] To achieve an axial sliding connection, a first sliding ring 12 and a second sliding ring 13 are fixedly connected at the connection between the nozzle 1 and the drill bit 2, and a third sliding ring 23 is fixedly connected to the inner wall of the drill bit 2. The first sliding ring 12 and the third sliding ring 23 are in sliding engagement, and the second sliding ring 13 serves as an auxiliary guide or limiter. In addition, a limit ring 14 is fixedly connected to the nozzle 1, and the limit ring 14 is located behind the first sliding ring 12. A first spring 15 is fixedly connected to the limit ring 14, and the other end of the first spring 15 abuts against the inner end face of the rear end of the drill bit 2. The first spring 15 is always in a compressed state, and its elastic force forces the drill bit 2 to extend forward relative to the nozzle 1.

[0028] A telescopic pipe 211 is fixedly connected to the first water outlet 21. The rear end of the telescopic pipe 211 can slide into the inner cavity of the nozzle 1, and a sealing ring is provided between the outer wall of the telescopic pipe 211 and the inner wall of the nozzle 1 to prevent high-pressure water leakage. The inner cavity of the telescopic pipe 211 connects the water outlet of the nozzle 1 with the first water outlet 21, ensuring that the first water outlet 21 can obtain high-pressure water regardless of the axial position of the drill bit 2.

[0029] The telescopic scraper assembly 3 is fixedly connected to the outer wall of the drill bit 2. In this embodiment, 2 to 4 sets are provided, evenly distributed along the circumference of the drill bit 2. Each set of telescopic scraper assembly 3 includes: a housing 31, a telescopic rod 32, a connecting rod assembly 33, and a scraper rod 34.

[0030] The outer casing 31 is rectangular and box-shaped, and is fixedly connected to the outer wall of the drill bit 2. The telescopic rod 32 is slidably connected to the inside of the outer casing 31 along the axial direction of the drill bit 2. The front end of the telescopic rod 32 faces the abutment plate 11 on the nozzle 1, and the rear end of the telescopic rod 32 is fixedly connected to the rear inner wall of the outer casing 31 by a second spring 321. In its natural state, the second spring 321 pushes the telescopic rod 32 towards the front end of the outer casing 31, so that the front end of the telescopic rod 32 protrudes from the front end face of the outer casing 31.

[0031] The linkage assembly 33 includes a first fixing plate 331, a second fixing plate 332, and a folding rod 333. The first fixing plate 331 is fixedly connected to the top or side wall of the housing 31; the second fixing plate 332 is fixedly connected to the telescopic rod 32; the middle part of the scraper rod 34 is rotatably connected to the second fixing plate 332 via a pin; one end of the folding rod 333 is hinged to the first fixing plate 331, and the other end is hinged to the root of the scraper rod 34 away from the scraper blade edge. The folding rod 333 is formed by two connecting rods connected by a hinge, and can be folded or unfolded. A blade holder 311 is also fixedly connected to the housing 31. The blade holder 311 is located at the front end of the housing 31 near the first water outlet 21. The blade holder 311 is used to abut against the back of the scraper rod 34 to limit the maximum extension angle of the scraper rod 34.

[0032] Working process and principle: High-pressure water enters from the rear end of nozzle 1, with one stream flowing through telescopic pipe 211 and exiting at high speed from the first outlet 21 to impact the blockage in front; the other stream is guided by water guide cone ring 16 and exits from the second outlet 22 with a triangular cross-section. Because the second outlet 22 is triangular, the water flow generates a tangential force, driving drill bit 2 to rotate at high speed around its axis. The rotating drill bit 2, in conjunction with the forward water jet from the first outlet 21, performs a combined mechanical cutting and hydraulic impact to break up the hard blockage.

[0033] When the drill bit 2 encounters a large hard object, a protruding pipe wall, or a step with a change in diameter, the drill bit 2 experiences axial resistance, overcomes the elastic force of the first spring 15, and slides backward relative to the nozzle 1. At this time, the front end of the telescopic rod 32 gradually approaches and eventually touches the abutment plate 11 fixed on the nozzle 1. As the drill bit 2 continues to move backward, the abutment plate 11 presses the telescopic rod 32 into the housing 31, and the telescopic rod 32 compresses the second spring 321 and drives the second fixing plate 332 to move backward. The second fixing plate 332 pulls the middle part of the scraper rod 34 to move backward, while the root of the scraper rod 34 is connected to the first fixing plate 331 through the folding rod 333. The folding rod 333 gradually unfolds from the folded state, forcing the scraper rod 34 to rotate outward perpendicular to the drill bit axis around its hinge point with the second fixing plate 332. Finally, the cutting edge of the scraper rod 34 extends from the side of the housing 31 and presses against the tool holder 311, obtaining stable radial support. The extended scraper bar 34 adheres closely to the inner wall of the pipe or the side wall of the blockage. As the device continues to advance, the scraper bar 34 cuts up the scale on the pipe wall or opens up the jamming point, thereby helping the drill bit 2 to get out of trouble.

[0034] Once the drill bit 2 passes the obstacle, the axial resistance disappears, and the first spring 15 pushes the drill bit 2 forward to reset. The telescopic rod 32 separates from the stop plate 11, and the second spring 321 pushes the telescopic rod 32 forward, causing the connecting rod assembly 33 to move in the opposite direction. The scraper rod 34 retracts radially into the housing 31, reducing the outer diameter of the device and restoring normal operation.

[0035] This invention provides a high-pressure dredging device for municipal pipelines, which can realize hydraulically driven drill bit rotation to cut hard objects, and automatically extend scraper to clear obstacles radially when encountering obstruction, thereby effectively improving dredging efficiency and passability, and has high reliability.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-pressure dredging device for municipal pipelines, characterized in that, include: The nozzle (1) is fixedly connected to a backing plate (11). The drill bit (2) is sleeved on the outside of the nozzle (1). The drill bit (2) is axially slidably connected to the nozzle (1). The end of the drill bit (2) is provided with a first water outlet hole (21). The inside of the drill bit (2) is provided with a second water outlet hole (22). Telescopic scraper assembly (3) is fixedly connected to the outer wall of the drill bit (2). The end of the telescopic scraper assembly (3) extends in a direction perpendicular to the axis of the drill bit (2) by touching the abutment plate (11).

2. The municipal pipeline high-pressure dredging device according to claim 1, characterized in that, A first sliding ring (12) and a second sliding ring (13) are fixedly connected at the connection between the nozzle (1) and the drill bit (2). A third sliding ring (23) is fixedly connected on the drill bit (2). The first sliding ring (12) and the third sliding ring (23) are slidably connected.

3. A high-pressure dredging device for municipal pipelines according to claim 1, characterized in that, A limiting ring (14) is fixedly connected to the nozzle (1), and a first spring (15) is fixedly connected to the limiting ring (14). The first spring (15) also abuts against the inside of the drill bit (2).

4. A high-pressure dredging device for municipal pipelines according to claim 1, characterized in that, A telescopic tube (211) is fixedly connected to the first water outlet (21). The telescopic tube (211) slides into the interior of the nozzle (1) and communicates with the inner cavity of the nozzle (1). A water guide cone ring (16) is fixedly connected to the water outlet of the nozzle (1). The outlet of the water guide cone ring (16) faces the second water outlet (22).

5. A high-pressure dredging device for municipal pipelines according to claim 4, characterized in that, The second water outlet (22) is triangular in shape, and the drill bit (2) has multiple second water outlets (22) inside, so that the water discharged from the water guide cone ring (16) drives the drill bit (2) to rotate.

6. A high-pressure dredging device for municipal pipelines according to claim 1, characterized in that, The telescopic scraper assembly (3) includes: a housing (31), a telescopic rod (32), a connecting rod assembly (33), and a scraper rod (34). The outer shell (31) is fixedly connected to the outside of the drill bit (2); the telescopic rod (32) is slidably connected to the inside of the outer shell (31), with one end of the telescopic rod (32) facing the abutment plate (11) and the other end fixedly connected to the inside of the outer shell (31) through the second spring (321).

7. A high-pressure dredging device for municipal pipelines according to claim 6, characterized in that, The linkage assembly (33) includes: a first fixing plate (331), a second fixing plate (332), and a folding rod (333); The first fixing plate (331) is fixedly connected to the outer shell (31); the second fixing plate (332) is fixedly connected to the telescopic rod (32); the scraper rod (34) is rotatably connected to the second fixing plate (332); one end of the folding rod (333) is fixedly connected to the first fixing plate (331), and the other end is fixedly connected to the scraper rod (34).

8. A high-pressure dredging device for municipal pipelines according to claim 7, characterized in that, A blade holder (311) is fixedly connected to the outer shell (31), the blade holder (311) abuts against the scraper rod (34), and the blade holder (311) is located at one end of the outer shell (31) near the first water outlet (21).

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