Underwater culvert pipe dredging device

Abstract

The invention relates to the field of pipeline dredging, and discloses an underwater culvert pipe dredging device which comprises a base, a pipe frame, a pressure-resistant pipe, a high-pressure water pump, a dredging head and a controller, the pipe frame is vertically and rotatably installed in the middle of the base and comprises supporting legs, a rotating shaft and a baffle, and one end of the pressure-resistant pipe penetrates through the rotating shaft to be arranged in the rotating shaft; the extending end of the pressure-resistant pipe is wound on the pipe frame, the high-pressure water pump is installed on the base on one side of the pipe frame and connected with the end of the pressure-resistant pipe through a rotating flange, the dredging head is connected to the extending end of the pressure-resistant pipe, a position sensor is installed on the dredging head, and a controller is installed on the base on the side, away from the high-pressure water pump, of the pipe frame. The controller is communicated with the high-pressure water pump and the dredging head, a position sensor and a gyroscope are installed on the dredging head, and the controller adjusts the output power of the high-pressure water pump according to information fed back by the position sensor and the gyroscope so as to control the dredging head to move underwater. The position of the dredging head can be controlled in real time.

Description

Technical Field

[0001] The invention relates to the field of pipeline dredging, in particular to an underwater culvert dredging device. Background Art

[0002] Culverts are pipes buried under the ground, generally used as water pipes, and the most common ones are culverts for discharging rainwater and sewage. This type of culvert is prone to blockage after silting due to the large amount of impurities in rainwater and sewage, thus affecting the discharge effect of the culvert. In the existing scheme, the treatment of blocked culverts is achieved by using a water rat dredging and cleaning machine. The water rat dredging and cleaning machine pressurizes water through a high-pressure water pump, transmits the high-pressure water to the rat nozzle through a pressure-resistant pipe, and uses the rat nozzle to impact the blocked area to dredge the culvert. However, this type of machine is only suitable for shallow pipes such as residential areas and municipalities. The rat nozzle can be directly placed in the corresponding culvert, but it is extremely inconvenient to control the rat nozzle for culverts deeper underwater, and the existing underwater cleaning robot is also inconvenient to use due to its large size. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the background technology and provide an underwater culvert dredging device.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] An underwater culvert dredging device comprises a base, a pipe rack, a pressure-resistant pipe, a high-pressure water pump, a dredging head and a controller. The pipe rack is vertically and rotatably installed in the middle of the base. The pipe rack comprises a supporting leg, a rotating shaft and a baffle. There are two supporting legs. The rotating shaft is rotatably installed between the two supporting legs through a bearing. Baffles are installed at both ends of the rotating shaft near the supporting legs. The rotating shaft is hollow. One end of the pressure-resistant pipe passes through the rotating shaft to the inside of the rotating shaft. The protruding end of the pressure-resistant pipe is wound on the pipe rack. The high-pressure water pump is installed on the base on one side of the pipe rack. The high-pressure water pump is connected to the end of the pressure-resistant tube inside the rotating shaft through a rotating flange, and the rotating flange is installed on the side wall of the supporting leg. The dredging head is connected to the protruding end of the pressure-resistant tube, and a position sensor is installed on the dredging head. A controller is installed on the base of the pipe rack away from the side of the high-pressure water pump, and the controller is connected to the high-pressure water pump and the dredging head. A position sensor and a gyroscope are installed on the dredging head. The controller adjusts the output power of the high-pressure water pump according to the information fed back by the position sensor and the gyroscope to control the movement of the dredging head underwater.

[0006] A bottom beam is installed at the bottom of the support leg, and an engine and a reducer are installed on the bottom beam in sequence. The engine is connected to the input shaft of the reducer, and a reduction pinion is connected to the output shaft of the reducer. A reduction gear meshing with the reduction pinion is processed on the outer wall of one of the baffles, and the reduction pinion and the reduction gear form secondary reduction.

[0007] The rotating flange includes an input joint, an output joint and a clamping ring. The input joint is convex, and the output joint is concave. The water outlet end of the input joint extends into the inner side of the output joint. The end of the output joint is processed with an inclined cone surface, and the inclined cone surface is processed with sealing grooves evenly distributed in a circular ring. The surface of the sealing groove has a smooth transition. A sealing ring is installed on the output joint outside the inclined cone surface. The cross-section of the sealing ring is triangular. An annular protrusion that can extend into the sealing groove is installed on the side wall of the sealing ring close to the inclined cone surface. An inner support bearing supporting the output joint is installed on the outer wall of the output joint at the rear side of the inclined cone surface. A U-shaped retaining ring is processed on the rear side of the inner support bearing. A retaining sheet extending into the output joint is processed at the end of the output joint. The clamping ring is located at one end of the output joint away from the input joint. The clamping ring is sealed with the U-shaped retaining ring on the input joint to wrap the output joint. An outer support bearing supporting the output joint is installed in the clamping ring.

[0008] An oil filling hole is processed on the U-shaped retaining ring.

[0009] The dredging head includes a mounting seat, a hammer head and a solenoid valve, a flow channel is processed in the middle of the mounting seat, one end of the flow channel is threadedly connected to the pressure-resistant pipe, and the other end of the flow channel is connected to the hammer head, a pressurization channel is processed in the middle of the front end of the hammer head, and four evenly distributed back-spray channels are processed at the rear end of the hammer head, a groove is processed on the outer wall in the middle of the hammer head, two slideways are processed in the groove, and a rotating channel is processed on the hammer head between the two slideways, a rotatable rotating sleeve is installed on the slide, and multiple guide grooves are evenly processed on the rotating sleeve, and the pressurization channel, the back-spray channel and the rotating channel are all installed with solenoid valves.

[0010] The rotating sleeve is formed by buckling two C-shaped sleeves, the inner wall of the sleeve is processed with a ball opening ring aligned with the grooves on both sides of the slide, and a labyrinth sealing gasket matching the side wall of the slide is installed on the inner wall of the sleeve between the two opening rings.

[0011] The position sensor is mounted on a mounting seat, a cable for transmitting signals is mounted on the pressure-resistant tube, the position sensor and the gyroscope transmit the position information of the dredging head to the controller through the pressure-resistant tube, and an electric slip ring for transmitting signals is mounted on the rotating flange.

[0012] The underwater culvert dredging device provided by the present invention has the following beneficial effects:

[0013] (1) Through the base, pipe rack, pressure-resistant pipe, high-pressure water pump, dredging head and controller, the position of the dredging head can be understood in real time, and then the adjustment position of the dredging head can be controlled to improve the control accuracy of the dredging head. At the same time, the pipe rack can adjust the extension length of the dredging head according to the position of the dredging head;

[0014] (2) By providing an engine and a reducer, the retraction and extension of the pressure-resistant pipe can be controlled according to the needs of dredging, thereby reducing the labor intensity of manual operation;

[0015] (3) The swivel flange improves the smoothness of the connection between the pipe rack and the pressure-resistant pipe, effectively preventing the pressure-resistant pipe from tangling and winding, and makes the control of the dredging head more accurate, thereby improving the dredging efficiency;

[0016] (4) By setting up a dredging head and utilizing the pressurization channel, back-spray channel and rotation channel on the hammer head, the dredging head can be conveniently operated, so that the dredging head can still move accurately underwater, thereby improving the dredging efficiency;

[0017] (5) By setting a rotating sleeve, after the dredging head is inserted into the silt, a high-pressure area can be cleared outside the hammer head to avoid clogging of the hammer head, thus ensuring the smooth dredging process;

[0018] (6) By setting up a controller, the dredging device can be easily operated to perform underwater dredging operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the structure provided by an embodiment of the present invention.

[0021] Figure 2 A schematic structural diagram of a pipe rack provided in an embodiment of the present invention.

[0022] Figure 3 A schematic structural diagram of a rotating flange provided in an embodiment of the present invention.

[0023] Figure 4 A schematic diagram of the exploded structure of a rotating flange provided in an embodiment of the present invention.

[0024] Figure 5 A schematic cross-sectional view of a pressure-resistant tube provided in an embodiment of the present invention.

[0025] Figure 6 A schematic structural diagram of a dredging head provided in an embodiment of the present invention.

[0026] Figure 7 A schematic diagram of the internal structure of a dredging head provided in an embodiment of the present invention.

[0027] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0028] Figure numerals: 1, base; 2, pipe rack; 21, support leg; 22, rotating shaft; 23, baffle; 24, bottom beam; 25, engine; 26, reducer; 27, reduction pinion; 28, reduction gear; 3, rotating flange; 301, input joint; 302, output joint; 304, snap ring; 305, oblique cone; 306, sealing groove; 307, sealing ring; 308, annular protrusion; 309, inner support bearing; 310, U-shaped retaining ring; 311, retaining plate; 312, outer support bearing; 313. Oil filling hole; 314. Electric slip ring; 4. Pressure-resistant pipe; 41. Cable; 5. High-pressure water pump; 6. Clearing head; 61. Mounting seat; 611. Flow channel; 62. Hammer head; 621. Pressurization channel; 622. Back-spray channel; 623. Groove; 624. Slideway; 625. Rotating channel; 63. Solenoid valve; 64. Rotating sleeve; 641. Sheath; 642. Guide groove; 643. Ball opening ring; 644. Labyrinth seal; 7. Controller; 8. Position sensor; 9. Gyroscope. DETAILED DESCRIPTION

[0029] Example

[0030] like Figures 1 to 8As shown, the underwater culvert dredging device provided in this embodiment includes a base 1, a pipe rack 2, a pressure-resistant pipe 4, a high-pressure water pump 5, a dredging head 6 and a controller 7. The pipe rack 2 is vertically and rotatably installed in the middle of the base 1. The pipe rack 2 includes a supporting leg 21, a rotating shaft 22 and a baffle 23. There are two supporting legs 21, and the two supporting legs 21 are symmetrically arranged and fixedly connected to the base 1. The rotating shaft 22 is rotatably installed between the two supporting legs 21 through a bearing. Baffles 23 are installed at both ends of the rotating shaft 22 near the supporting legs 21. The baffle 23 is used for limiting. The baffle 311 cooperates with the rotating shaft 22 to form a limiting space. The rotating shaft 22 is hollow, one end of the pressure-resistant pipe 4 passes through the rotating shaft 22 as far as the inside of the rotating shaft 22, and the protruding end of the pressure-resistant pipe 4 is wound around the pipe rack 2. The high-pressure water pump 5 is installed On the base 1 on one side of the pipe rack 2, the high-pressure water pump 5 is connected to the end of the pressure-resistant pipe 4 inside the rotating shaft 22 through a rotating flange 3. The rotating flange 3 can maintain the normal operation of the high-pressure water pump 5 when the pressure-resistant pipe 4 is extended, and at the same time can reduce the torsion of the pressure-resistant pipe 4 to ensure the stability of the output. The rotating flange 3 is installed on the side wall of the support leg 21, and the dredging head 6 is connected to the extended end of the pressure-resistant pipe 4. A position sensor 8 is installed on the dredging head 6. A controller 7 is installed on the base 1 on the side of the pipe rack 2 away from the high-pressure water pump 5. The controller 7 is connected to the high-pressure water pump 5 and the dredging head 6. The dredging head 6 is installed with a position sensor 8 and a gyroscope 9. The controller 7 adjusts the output power of the high-pressure water pump 5 according to the information fed back by the position sensor 8 and the gyroscope 9 to control the movement of the dredging head 6 underwater.

[0031] In order to operate the dredging device more conveniently, Figure 2 As shown, a bottom beam 24 is installed at the bottom of the support leg 21, and an engine 25 and a reducer 26 are installed on the bottom beam 24 in sequence. The engine 25 is connected to the input shaft of the reducer 26, and the engine 25 and the reducer 26 form a primary reduction. A reduction pinion 27 is connected to the output shaft of the reducer 26. A reduction gear 28 meshing with the reduction pinion 27 is processed on the outer wall of one of the baffles 23. The reduction pinion 27 and the reduction gear 28 form a secondary reduction. The cooperation of the primary reduction and the secondary reduction can enable the pipe rack 2 to stably retract or unfold the pressure-resistant pipe 4 at a low speed, and at the same time can obtain a larger torque, thereby improving the stability of driving the pipe rack 2 to rotate.

[0032] In order to ensure the pressure-maintaining capacity of the rotating flange 3, Figure 3 , Figure 4As shown, the rotating flange 3 includes an input joint 301, an output joint 302 and a clamping ring 304. The input joint 301 is convex, and the output joint 302 is concave. The water outlet end of the input joint 301 extends into the inner side of the output joint 302. The end of the output joint 302 is processed with an inclined cone surface 305, and the inclined cone surface 305 is processed with sealing grooves 306 evenly distributed in a circular ring. The surface of the sealing groove 306 is smoothly transitioned. A sealing ring 307 is installed on the output joint 302 outside the inclined cone surface 305. The cross section of the ring 307 is triangular, and the triangular sealing ring 307 can stably fit the gap between the input connector 301 and the output connector 302, thereby effectively improving the sealing effect. An annular protrusion 308 that can extend into the sealing groove 306 is installed on the side wall of the sealing ring 307 close to the inclined cone surface 305, and an inner support bearing 309 that supports the output connector 302 is installed on the outer wall of the output connector 302 behind the inclined cone surface 305. The input connector 301 behind the inner support bearing 309 is processed with a U-shaped cross section. The output connector 302 is provided with a U-shaped retaining ring 310, and a retaining piece 311 extending into the output connector 302 is processed at the end of the output connector 302. The retaining piece 311 cooperates with the U-shaped retaining ring 310 to form a labyrinth sealing mechanism. The retaining ring 304 is located at the end of the output connector 302 away from the input connector 301. The retaining ring 304 is sealed with the U-shaped retaining ring 310 on the input connector 301 to wrap the output connector 302. An external support bearing 312 supporting the output connector 302 is installed in the retaining ring 304. The internal support bearing 309 cooperates with the external support bearing 312 to form a labyrinth sealing mechanism. , which can ensure that the output connector 302 rotates around the input connector 301, and can make the pressure-resistant pipe 4 wound on the pipe rack 2 unfold smoothly, and can still maintain the internal pressure-resistant state during its unfolding process, thereby improving the stability of the dredging device. In order to improve the sealing effect and the supporting effect, an oil filling hole 313 is processed on the U-shaped retaining ring 310. By injecting oil into the oil filling hole 313, the lubrication effect and the pressure-resistant effect can be improved to balance the stability of the pressure on the sealing ring 307, so that it can ensure the sealing effect while extending the service life.

[0033] In order to accurately control the position of the dredging head 6, Figure 7 , Figure 8As shown, the dredging head 6 includes a mounting seat 61, a hammer head 62 and a solenoid valve 63. A flow channel 611 is processed in the middle of the mounting seat 61. One end of the flow channel 611 is threadedly connected to the pressure-resistant tube 4, and the other end of the flow channel 611 is connected to the hammer head 62. A pressurized channel 621 is processed in the middle of the front end of the hammer head 62. The diameter of the pressurized channel 621 gradually decreases along the water flow direction to ensure the impact force of the discharged water flow. Four evenly distributed back-spray channels 622 are processed at the rear end of the hammer head 62. The back-spray channel 622 has a U-shaped cross-section, and the back-spray channel 622 is thin in the middle and thick at both ends. Each back-spray channel 622 is individually controlled. Through the cooperation of the four back-spray channels 622, multi-angle control can be performed. A groove 623 is processed on the outer wall of the middle part of the hammer head 62, and two slideways 624 are processed in the groove 623. The two slideways 624 A rotating channel 625 is processed on the hammer head 62 in between, and a rotatable rotating sleeve 64 is installed on the slideway 624. A plurality of guide grooves 642 are evenly processed on the rotating sleeve 64. The guide grooves 642 are spirally distributed along the inner wall of the rotating sleeve 64. The inner wall of the guide groove 642 is connected with the spiral channel, and the outer wall of the guide groove 642 penetrates the rotating sleeve 64 to the outside. The guide pipe can make the rotating sleeve 64 rotate around the hammer head 62. On the one hand, it ensures the stability of the hammer head 62 during movement. On the other hand, when silting, a safe channel is reserved for the hammer head 62, which can reduce the phenomenon of the hammer head 62 being stuck in the column. The pressurized channel 621, the back-spraying channel 622 and the rotating channel 625 are all installed with electromagnetic valves 63. The electromagnetic valve 63 uses a flow electromagnetic valve 63, which can adjust the flow and flow rate of each channel to cope with various situations. To facilitate the assembly of the rotating sleeve 64, the rotating sleeve 64 is formed by two C-shaped sleeves 641 that are buckled together. The inner wall of the sleeve 641 is processed with a ball opening ring 643 that is aligned with the grooves 623 on both sides of the slide 624. The ball opening ring 643 is processed with a row of balls. The freedom of the sleeve can be improved by the balls. A labyrinth sealing gasket 644 that cooperates with the side wall of the slide 624 is installed on the inner wall of the sleeve 641 between the two opening rings. The labyrinth sealing gasket 644 can improve the sealing effect of the rotating sleeve 64. At the same time, when high-pressure water flows out, the sleeve 641 is pushed to rotate around the hammer head 62 under the support of the ball opening ring 643.

[0034] In order to achieve precise control, the position sensor 8 is installed on the mounting seat 61, and a cable 41 for transmitting signals is installed on the pressure-resistant tube 4. The position sensor 8 and the gyroscope 9 transmit the position information of the dredging head 6 to the controller 7 through the pressure-resistant tube 4. An electric slip ring 314 for transmitting signals is installed on the rotating flange 3. If necessary, an underwater camera can also be installed on the mounting seat 61.

[0035] The method of using the present invention is:

[0036] When in use, the dredging head 6 is connected to the pressure-resistant pipe 4. When connecting, the cable 41 on the pressure-resistant pipe 4 is connected to the position sensor 8 and the gyroscope 9 in the mounting seat 61, so that the controller 7 can obtain the position of the dredging head 6. Then the engine 25 is controlled to work, and the pressure-resistant pipe 4 wound on the pipe rack 2 is gradually loosened, and the dredging head 6 is thrown into the water. At this time, the high-pressure water pump 5 is started, and the high-pressure water pump 5 pumps water through the pressure-resistant pipe 4 to the dredging head 6, and the water is sprayed from the dredging head 6 to adjust the position of the dredging head 6. At this time, the operator controls the solenoid valve 63 on the back-spray channel 622 to open, so that high-pressure water is sprayed from the back-spray channel 622 to provide a forward impulse for the dredging head 6. At this time, the four back-spray channels are adjusted. The water flow of 622 can control the forward direction of the dredging head 6 under the friction of water. After the dredging head 6 moves to the specified position, the solenoid valve 63 on the pressurized channel 621 opens, and part of the water is sprayed toward the front of the hammer head 62 to open the channel. The flow of the four back-spray channels 622 is slightly greater than the water flow of the pressurized channel 621 to ensure that the hammer head 62 moves forward normally. During this process, the solenoid valve 63 of the rotating channel 625 is opened, and part of the high-pressure water flows out of the rotating channel 625. During the outflow process, it acts on the rotating sleeve 64, causing the rotating sleeve 64 to rotate around the hammer head 62 and expand the hole opened by the hammer head 62 outside the hammer head 62, thereby reducing silt accumulation and improving the dredging effect.

[0037] Since the rotating sleeve 64 rotates during operation, the hammer head 62 will rotate, which may easily cause the compression tube 4 to be entangled. On the one hand, a steel wire can be added inside the compression tube 4 to improve the anti-torsion effect, such as Figure 5 As shown, on the other hand, the water spraying angles of the rotating channel 625 and the reverse spraying channel 622 are adjusted so that their thrust can offset the horizontal torque.

[0038] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention shall be included in the protection scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present invention omits the description of known components and processing technologies and processes to avoid unnecessary limitation of the present invention.

Claims

1. An underwater culvert dredging device, characterized in that: The invention comprises a base (1), a pipe rack (2), a pressure-resistant pipe (4), a high-pressure water pump (5), a dredging head (6) and a controller (7). The pipe rack (2) is vertically and rotatably mounted in the middle of the base (1). The pipe rack (2) comprises a supporting leg (21), a rotating shaft (22) and a baffle (23). The supporting leg (21) has two, and the rotating shaft (22) is rotatably mounted between the two supporting legs (21) through a bearing. The baffles (23) are mounted at both ends of the rotating shaft (22) near the supporting legs (21). The rotating shaft (22) is hollow, and one end of the pressure-resistant pipe (4) passes through the rotating shaft (22) to the inside of the rotating shaft (22). The protruding end of the pressure-resistant pipe (4) is wound on the pipe rack (2). The high-pressure water pump (5) is mounted on the base on one side of the pipe rack (2). (1), a high-pressure water pump (5) is connected to the end of the pressure-resistant pipe (4) inside the rotating shaft (22) through a rotating flange (3), the rotating flange (3) is installed on the side wall of the supporting leg (21), the dredging head (6) is connected to the protruding end of the pressure-resistant pipe (4), a position sensor (8) is installed on the dredging head (6), a controller (7) is installed on the base (1) of the pipe rack (2) on the side away from the high-pressure water pump (5), the controller (7) is connected to the high-pressure water pump (5) and the dredging head (6), the position sensor (8) and the gyroscope (9) are installed on the dredging head (6), and the controller (7) adjusts the output power of the high-pressure water pump (5) according to the information fed back by the position sensor (8) and the gyroscope (9) to control the movement of the dredging head (6) underwater.

2. The underwater culvert dredging device according to claim 1, characterized in that: A bottom beam (24) is installed at the bottom of the support leg (21), and an engine (25) and a reducer (26) are installed on the bottom beam (24) in sequence. The engine (25) is connected to the input shaft of the reducer (26), and a reduction pinion (27) is connected to the output shaft of the reducer (26). A reduction gear (28) meshing with the reduction pinion (27) is processed on the outer wall of one of the baffles (23), and the reduction pinion (27) and the reduction gear (28) form a secondary reduction.

3. The underwater culvert dredging device according to claim 1, characterized in that: The rotating flange (3) comprises an input joint (301), an output joint (302) and a clamping ring (304); the input joint (301) is convex, the output joint (302) is concave, the water outlet end of the input joint (301) extends into the inner side of the output joint (302), an inclined conical surface (305) is processed at the end of the output joint (302), and sealing grooves (306) evenly distributed in the shape of a circular ring are processed on the inclined conical surface (305), the surface of the sealing groove (306) has a smooth transition, a sealing ring (307) is installed on the output joint (302) outside the inclined conical surface (305), the cross section of the sealing ring (307) is triangular, and a sealing ring (307) that can extend into the sealing groove (306) is installed on the side wall of the sealing ring (307) close to the inclined conical surface (305). The output connector (302) has an annular protrusion (308) inside, an inner support bearing (309) for supporting the output connector (302) is installed on the outer wall of the output connector (302) at the rear side of the oblique cone surface (305), an input connector (301) at the rear side of the inner support bearing (309) is processed with a retaining ring (310) with a U-shaped cross section, an end of the output connector (302) is processed with a retaining sheet (311) extending into the output connector (302), a retaining ring (304) is located at one end of the output connector (302) away from the input connector (301), the retaining ring (304) is sealed with the U-shaped retaining ring (310) on the input connector (301), and the output connector (302) is wrapped, and an outer support bearing (312) for supporting the output connector (302) is installed in the retaining ring (304).

4. The underwater culvert dredging device according to claim 3, characterized in that: The U-shaped retaining ring (310) is provided with an oil injection hole (313).

5. The underwater culvert dredging device according to claim 1, characterized in that: The dredging head (6) comprises a mounting seat (61), a hammer head (62) and a solenoid valve (63); a flow channel (611) is processed in the middle of the mounting seat (61); one end of the flow channel (611) is threadedly connected to the pressure-resistant tube (4); the other end of the flow channel (611) is connected to the hammer head (62); a pressurizing channel (621) is processed in the middle of the front end of the hammer head (62); four evenly distributed back-spraying channels (622) are processed in the rear end of the hammer head (62); and an outer portion of the middle of the hammer head (62) is A groove (623) is processed on the wall, two slideways (624) are processed in the groove (623), a rotating channel (625) is processed on the hammer head (62) between the two slideways (624), a rotatable rotating sleeve (64) is installed on the slideway (624), and a plurality of guide grooves (642) are evenly processed on the rotating sleeve (64), and the pressurizing channel (621), the back-spraying channel (622) and the rotating channel (625) are all installed with electromagnetic valves (63).

6. The underwater culvert dredging device according to claim 5, characterized in that: The rotating sleeve (64) is formed by buckling two C-shaped sleeves (641), and the inner wall of the sleeve (641) is processed with a ball opening ring (643) aligned with the grooves (623) on both sides of the slideway (624). A labyrinth sealing gasket (644) matching the side wall of the slideway (624) is installed on the inner wall of the sleeve (641) between the two opening rings.

7. The underwater culvert dredging device according to claim 5, characterized in that: The position sensor (8) is mounted on a mounting seat (61), a cable (41) for transmitting signals is mounted on the pressure-resistant tube (4), the position sensor (8) and the gyroscope (9) transmit position information of the dredging head (6) to the controller (7) via the pressure-resistant tube (4), and an electric slip ring (314) for transmitting signals is mounted on the rotating flange (3).

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