A dredging device and dredging method for water conservancy projects

Abstract

The present invention discloses a dredging device and a dredging method for water conservancy projects, specifically related to the field of water conservancy dredging. It includes a moving mechanism, on one side of which an auxiliary mechanism is fixedly connected. Inside the moving mechanism, there is a first crushing mechanism, and on the outer wall of the first crushing mechanism, there are multiple second crushing mechanisms. The moving mechanism includes a first limiting ring, and the auxiliary mechanism includes a first sleeve rotatably installed inside the first limiting ring. On one side of the first sleeve, a threaded rod is fixedly connected. Both the first sleeve and the threaded rod are hollow inside, and the first crushing mechanism includes a first supporting frame rotatably installed inside the first sleeve and the threaded rod. By rotating the conical crushing roller, the sixth gear drives the roller and the crushing blades to rotate on the outer wall of the second sleeve, so that the silt clumps around the silt clumps broken by the conical crushing roller in the pipeline can be crushed again, increasing the treatment range of the coagulated silt inside the pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy dredging. More specifically, the present invention relates to a dredging device and a dredging method for water conservancy projects. Background Art

[0002] Water conservancy projects mainly study the basic knowledge and skills in aspects such as engineering hydrology, water conservancy engineering surveying, hydraulic reinforced concrete, hydraulic structures, engineering drawing, etc., and carry out engineering planning and design, on-site construction, engineering budget, and maintenance and repair of water conservancy equipment in the field of water conservancy projects. For example: building different types of hydraulic structures such as dams, dikes, spillways, sluice gates, channels, aqueducts, raft channels, fishways, etc.

[0003] Chinese invention patent CN202111562700.6 discloses a tubular culvert dredging device for water conservancy projects, including an annular housing. Its characteristics are: a star-shaped bracket is fixedly connected to the inner side of the annular housing, the middle of the star-shaped bracket is movably connected to one end of a water pipe, one end of the water pipe is fixedly communicated with one end of a rotary joint, one side of the other end of the rotary joint is fixedly connected to an L-shaped connecting rod, the other end of the L-shaped connecting rod is fixedly connected to the star-shaped bracket, the other end of the water pipe is fixedly communicated with the middle of an arc-shaped pipe, a group of uniformly arranged high-pressure nozzles are fixedly communicated with the arc-shaped pipe, an internal gear ring is movably connected inside the annular housing, and the annular housing meshes with a power gear. The present invention relates to the field of culvert dredging equipment. Specifically, it relates to a tubular culvert dredging device for water conservancy projects. The present invention is a tubular culvert dredging device for water conservancy projects, which is beneficial to realizing the dredging of culverts with different diameters.

[0004] However, this invention can only clean and dredge wet silt by means of water flushing, and cannot clean the silt dried on the inner wall of the pipeline, which is not convenient for actual use. Therefore, the present invention proposes a tubular culvert dredging device for water conservancy projects to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a dredging device and a dredging method for water conservancy projects. By rotating the conical crushing roller, the sixth gear drives the roller and the crushing blades to rotate on the outer wall of the second sleeve to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A dredging device for water conservancy projects, including a moving mechanism, an auxiliary mechanism is fixedly connected to one side of the moving mechanism, a first crushing mechanism is arranged inside the moving mechanism, and a plurality of second crushing mechanisms are arranged on the outer wall of the first crushing mechanism;

[0007] The moving mechanism includes a first limiting ring. The auxiliary mechanism includes a first sleeve rotatably installed inside the first limiting ring. One side of the first sleeve is fixedly connected to a threaded rod. The interiors of the first sleeve and the threaded rod are both hollow. And the first crushing mechanism includes a first supporting frame rotatably installed inside the first sleeve and the threaded rod. One end of the first supporting frame is fixedly connected to a second motor for driving its rotation. The end of the first supporting frame away from the second motor is fixedly connected to a second supporting frame. One end of the second supporting frame is fixedly connected to a conical crushing roller. A second sleeve is rotatably installed on one side of the conical crushing roller close to the second supporting frame. A conical cover plate is fixedly installed on the side of the second sleeve away from the conical crushing roller. The second sleeve is rotatably installed on the outer wall of the threaded rod. A fifth gear is fixedly installed on the outer wall of the conical crushing roller. The second crushing mechanism includes a support plate fixedly installed on the outer wall of the second sleeve. A roller is rotatably installed on one side of the support plate. One end of the roller is fixedly connected to a sixth gear meshing with the fifth gear. A plurality of crushing blades are fixedly installed on the outer wall of the roller at equal intervals in a circular shape in sequence.

[0008] In a preferred embodiment, the number of the rollers is set to be multiple, and the multiple rollers are arranged at equal intervals in a circular shape around the outer wall surface of the second sleeve in sequence.

[0009] In a preferred embodiment, a threaded sleeve is meshed with the outer wall of the threaded rod. A plurality of first struts are hinged to the outer wall of the threaded sleeve. One side of each of the plurality of first struts is hinged to a first support plate. A second support plate is fixedly installed on the top of the first support plate. A second strut is hinged to one side of the second support plate. The side of the second strut away from the second support plate is hinged to a limiting sleeve. The limiting sleeve is rotatably installed on the outer wall of the threaded rod. And a connecting frame is fixedly installed between the limiting sleeve and the first sleeve.

[0010] In a preferred embodiment, the second support plate and the first support plate are arranged in a parallel state to each other. An inflatable airbag is fixedly installed on the outer wall of the second support plate. An arc-shaped scraping plate is fixedly installed on the outer wall of the inflatable airbag.

[0011] In a preferred embodiment, a second limiting ring is fixedly installed on the outer wall of the first limiting ring. A plurality of sliders are slidably installed inside the second limiting ring. One side of each of the plurality of sliders is fixedly connected to a slide bar. And a driving wheel is fixedly installed on one side of each of the plurality of slide bars. A third limiting ring is rotatably installed on one side of the first limiting ring. An arc-shaped limiting groove is formed inside the third limiting ring. A connecting rod fixedly connected to the slider is slidably installed inside the arc-shaped limiting groove.

[0012] In a preferred embodiment, a gear ring is fixedly installed on the inner wall of the third limiting ring. A first gear meshing with the gear ring is rotatably installed on one side of the first limiting ring. A second gear is fixedly connected to one side of the first gear. A third gear is fixedly installed on the outer wall of the first sleeve. A fourth gear meshes with the outer wall of the third gear. The fourth gear and the second gear are arranged in a meshing state with each other. One end of the fourth gear passing through the first limiting ring is fixedly connected to a first motor for driving it to rotate.

[0013] In a preferred embodiment, a dredging method for a dredging device used in a water conservancy project is as follows:

[0014] First step: First, insert the whole device into the inside of the water conservancy pipeline. Then start the first motor to drive the fourth gear to rotate, so that the second gear drives the first gear to rotate, and the third limiting ring deflects to drive the connecting rod to drive the slider and the sliding rod to slide in the inner cavity of the second limiting ring until a plurality of driving wheels are limited and pressed against the inner wall of the pipeline, and then the device can be preliminarily limited and installed.

[0015] Second step: When the fourth gear rotates in combination with the first step, the third gear rotates synchronously, which can make the threaded rod rotate. Then the threaded sleeve translates on the outer wall of the threaded rod, and then the first support rod drives the second support rod to deflect until a plurality of arc-shaped scraping plates are limited and pressed against the inner wall of the pipeline. At this time, when the driving wheels are started to move again, a plurality of arc-shaped scraping plates can move on the inner wall of the pipeline and scrape and remove the impurities on the inner wall of the pipeline.

[0016] Third step: In combination with the second step, while starting the driving wheels to move, start the second motor to make the first supporting frame drive the second supporting frame to make the conical crushing roller rotate inside the pipeline, and perform crushing and stirring treatment on the dried silt blocks inside the pipeline.

[0017] Fourth step: In combination with the third step, the rotating conical crushing roller drives the fifth gear to rotate, so that a plurality of sixth gears can synchronously drive the rotating roller and the crushing blades to rotate on the outer wall of the second sleeve, and then rotate and stir in multiple directions inside the pipeline, so that the periphery of the crushed silt blocks in the central part of the pipeline can be crushed again, and then quickly crush the dried silt blocks inside the pipeline.

[0018] Fifth step: As the second sleeve and the conical cover plate continuously move inside the pipeline, when they come into contact with the silt to be crushed by the crushing blades and the conical crushing roller, they can scrape and pull out the silt along the trend and out of the pipeline, and then clear out the silt inside the pipeline.

[0019] The technical effects and advantages of the present invention:

[0020] 1. The present invention is provided with a rotatable conical crushing roller for crushing the silt condensed inside the water pipeline. At the same time, limited by the rotating fifth gear, the sixth gear drives the roller and the crushing blades to rotate on the outer wall of the second sleeve, so that the silt clumps around the part crushed by the conical crushing roller inside the pipeline can be crushed again, increasing the treatment range of the silt condensed inside the pipeline, and thus enhancing the treatment efficiency and cleaning quality of the silt condensed inside the pipeline.

[0021] 2. The present invention is provided with a sliding rod whose support height can be adjusted, so that the driving wheel can be used for supporting and moving inside pipelines of different thickness specifications. At the same time, the first support rod and the first support plate that can be expanded and adjusted synchronously with the height adjustment of the sliding rod are provided, so that while the driving wheel is limited and pressed against the inner wall of the pipeline, the plurality of arc-shaped scraping plates are synchronously limited and pressed against the inner wall of the pipeline. On the one hand, it stably supports the movement of the plurality of driving wheels, and on the other hand, when moving, it can synchronously scrape and process the stubborn impurities on the inner wall of the pipeline, thereby improving the overall cleaning effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 is a front sectional view of the structure of the present invention.

[0024] Figure 3 For the present invention Figure 2 is an enlarged view of the structure of part A of the present invention.

[0025] Figure 4 For the present invention Figure 2 is an enlarged view of the structure of part B of the present invention.

[0026] Figure 5 For the present invention Figure 2 is an enlarged view of the structure of part C of the present invention.

[0027] Figure 6 is a schematic diagram of a partial structure of the moving mechanism of the present invention.

[0028] Figure 7 For the present invention Figure 6 is an enlarged view of the structure of part D of the present invention.

[0029] The reference numerals are: 1 moving mechanism, 101 first limiting ring, 102 second limiting ring, 103 slider, 104 slide bar, 105 driving wheel, 106 third limiting ring, 107 arc-shaped limiting groove, 108 connecting rod, 109 gear ring, 110 first gear, 111 second gear, 2 auxiliary mechanism, 21 first sleeve, 22 third gear, 23 threaded rod, 24 threaded sleeve, 25 first support rod, 26 first support plate, 27 second support plate, 28 inflatable airbag, 29 arc-shaped scraping plate, 210 second support rod, 211 limiting sleeve, 212 connecting frame, 213 fourth gear, 214 first motor, 3 first crushing mechanism, 31 first supporting frame, 32 second motor, 33 second supporting frame, 34 conical crushing roller, 35 second sleeve, 36 conical cover plate, 37 fifth gear, 4 second crushing mechanism, 41 support plate, 42 rotating roller, 43 sixth gear, 44 crushing blade. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Refer to the specification appendix Figures 1-7 , a dredging device for water conservancy projects according to an embodiment of the present invention, as Figure 1 shown, includes a moving mechanism 1. One side of the moving mechanism 1 is fixedly connected with an auxiliary mechanism 2. The inside of the moving mechanism 1 is provided with a first crushing mechanism 3, and the outer wall of the first crushing mechanism 3 is provided with a plurality of second crushing mechanisms 4;

[0032] Refer to Figures 2-3 shown, the moving mechanism 1 includes a first limiting ring 101. The auxiliary mechanism 2 includes a first sleeve 21 rotatably installed inside the first limiting ring 101. One side of the first sleeve 21 is fixedly connected with a threaded rod 23. The inside of the first sleeve 21 and the threaded rod 23 are both hollow. And the first crushing mechanism 3 includes a first supporting frame 31 rotatably installed inside the first sleeve 21 and the threaded rod 23. One end of the first supporting frame 31 is fixedly connected with a second motor 32 for driving it to rotate. Combining Figures 4-5As shown, one end of the first carrier 31 away from the second motor 32 is fixedly connected to the second carrier 33. One end of the second carrier 33 is fixedly connected to a conical crushing roller 34. During actual use, when the second motor 32 is started to rotate the first carrier 31 as a whole, the second carrier 33 can synchronously drive the conical crushing roller 34 to rotate. Then, when the first crushing mechanism 3 as a whole is placed inside the water conservancy pipeline, by rotating the conical crushing roller 34, the silt and other impurities blocked inside the pipeline can be crushed and grooved, so that the coagulated silt is subjected to external force crushing treatment, thus facilitating the subsequent dredging and discharging of the silt. At the same time, referring to Figure 5 As shown, a second sleeve 35 is rotatably installed on one side of the conical crushing roller 34 close to the second carrier 33. Combining Figure 4 As shown, a conical cover plate 36 is fixedly installed on one side of the second sleeve 35 away from the conical crushing roller 34. The second sleeve 35 is rotatably installed on the outer wall of the threaded rod 23. The purpose of such a setting is that when the first crushing mechanism 3 as a whole moves and rotates inside the water conservancy pipeline, the rotating conical crushing roller 34 can drill the silt coagulated inside the pipeline. At the same time, combining Figure 5 As shown, a fifth gear 37 is fixedly installed on the outer wall of the conical crushing roller 34. The second crushing mechanism 4 includes a support plate 41 fixedly installed on the outer wall of the second sleeve 35. A roller 42 is rotatably installed on one side of the support plate 41. One end of the roller 42 is fixedly connected to a sixth gear 43 meshing with the fifth gear 37. A plurality of crushing blades 44 are fixedly installed on the outer wall of the roller 42 at equal intervals in a circular shape. The purpose of such a setting is that when the second carrier 33 rotates to crush the silt inside the pipeline, the rotating fifth gear 37 can also drive the sixth gear 43 to rotate synchronously. Then, the roller 42 rotates on the outer wall of the second sleeve 35 together with the plurality of crushing blades 44, so as to perform a secondary rotary crushing treatment on the crushed silt blocks, thus breaking up the coagulated silt, so that the conical cover plate 36 can scrape and remove the silt from the pipeline. At the same time, when the silt inside the pipeline is too dry and the rotating conical crushing roller 34 can only crush the silt blocks within its contact range, the rotating roller 42 and the crushing blades 44 can stir and mix the silt at positions that the conical crushing roller 34 cannot reach, so that the silt at the side position of the pipeline can move towards the position opened by the conical crushing roller 34, avoiding the problem that only the part in contact with the conical crushing roller 34 can be opened and removed, thereby enhancing the cleaning effect on the dried silt inside the water pipeline.

[0033] Furthermore, the number of the rotating rollers 42 is set to be multiple, and the multiple rotating rollers 42 are arranged in an equidistant state in a ring around the outer wall surface of the second sleeve 35. The purpose of such a setting is that when the conical crushing roller 34 rotates to crush the silt inside the pipeline, the multiple rotating rollers 42 and the crushing blades 44 provided on its outer periphery can synchronously stir and damage the silt in multiple directions inside the pipeline, thereby improving the working range and working efficiency of cleaning the silt inside the pipeline and being more convenient for actual use.

[0034] Furthermore, when cleaning the stubborn impurities on the inner wall of the pipeline, referring to Figure 4 as shown, a threaded sleeve 24 is engaged with the outer wall of the threaded rod 23. A plurality of first support rods 25 are hinged to the outer wall of the threaded sleeve 24. A first support plate 26 is hinged to one side of the plurality of first support rods 25. A second support plate 27 is fixedly installed on the top of the first support plate 26. Combining Figure 4 and Figure 3 as shown, a second support rod 210 is hinged to one side of the second support plate 27. A limiting sleeve 211 is hinged to the side of the second support rod 210 away from the second support plate 27. The limiting sleeve 211 is rotatably installed on the outer wall of the threaded rod 23, and a connecting frame 212 is fixedly installed between the limiting sleeve 211 and the first sleeve 21. The purpose of such a setting is that when the first sleeve 21 is rotated to make the threaded rod 23 rotate as a whole, through the limitation of the connecting frame 212, the whole limiting sleeve 211 can be kept stationary. Then, combined with the limitation of the second support rod 210 and the second support plate 27 on the first support rod 25 and the threaded sleeve 24, when the threaded rod 23 rotates, the threaded sleeve 24 can perform a linear translation movement on its outer wall. Then, the plurality of first support rods 25 and the second support rods 210 are deflected by force until the second support plate 27 is limited and pressed against the inner wall of the water pipeline. At the same time, referring to Figure 4As shown, the second support plate 27 is arranged in a parallel state with the first support plate 26. The purpose of this arrangement is that when multiple first struts 25 drive the corresponding second struts 210 to deflect and cause the second support plate 27 to displace and approach the inner wall of the pipeline, the first support plate 26 and the second support plate 27 always maintain a horizontal state and then stably fit and press against the inner wall of the pipeline. At the same time, an inflatable airbag 28 is fixedly installed on the outer wall of the second support plate 27, and an arc-shaped scraper 29 is fixedly installed on the outer wall of the inflatable airbag 28. The purpose of this arrangement is that when the second support plate 27 gradually approaches the inner wall of the pipeline, the arc-shaped scraper 29 can be made to contact the inner wall of the pipeline first, and during the movement, multiple arc-shaped scrapers 29 can move along the inner wall of the pipeline and scrape off the impurities on the inner wall of the pipeline. In combination with the setting of the inflatable airbag 28, the arc-shaped scraper 29 can be kept in a flexible state. When it is difficult to handle stubborn impurities, the inflatable airbag 28 can be caused to contract by the bidirectional extrusion of the impurities and the second support plate 27, so that the arc-shaped scraper 29 can cross over the impurities, thus avoiding the problem that the arc-shaped scraper 29 is damaged due to mutual pressing with the impurities.

[0035] Further, referring to Figure 3 As shown, a second limit ring 102 is fixedly installed on the outer wall of the first limit ring 101. A plurality of sliders 103 are slidably installed inside the second limit ring 102. One side of each of the plurality of sliders 103 is fixedly connected to a slide rod 104, and a driving wheel 105 is fixedly installed on one side of each of the plurality of slide rods 104. During actual use, by placing the moving mechanism 1 as a whole into the pipeline and driving the plurality of driving wheels 105 to rotate, the moving mechanism 1 as a whole can drive the auxiliary mechanism 2 and the first crushing mechanism 3 to move inside the pipeline. At the same time, referring to Figure 3 As shown, a third limit ring 106 is rotatably installed on one side of the first limit ring 101. An arc-shaped limit groove 107 is formed inside the third limit ring 106. A connecting rod 108 fixedly connected to the slider 103 is slidably installed inside the arc-shaped limit groove 107. During actual use, by rotating the third limit ring 106, the arc-shaped limit groove 107 can be made to displace synchronously. Then, through the limitation of the connecting rod 108 by the arc-shaped limit groove 107, the connecting rod 108 can drive the slider 103 to slide inside the second limit ring 102, so as to adjust the supporting length of the slide rod 104 and the driving wheel 105.

[0036] Combined with Figure 7As shown, a gear ring 109 is fixedly installed on the inner wall of the third limiting ring 106. A first gear 110 meshing with the gear ring 109 is rotatably installed on one side of the first limiting ring 101. A second gear 111 is fixedly connected to one side of the first gear 110. A third gear 22 is fixedly installed on the outer wall of the first sleeve 21. A fourth gear 213 meshes with the outer wall of the third gear 22. The fourth gear 213 and the second gear 111 are arranged in a meshing state with each other. And referring to Figure 3 As shown, one end of the fourth gear 213 passes through the first limiting ring 101 and is fixedly connected to a first motor 214 for driving its rotation. The purpose of such a setting is that when the first motor 214 is started to make the fourth gear 213 rotate, the third gear 22 can be synchronously driven to drive the first sleeve 21 to rotate, and then the threaded rod 23 rotates, so that the threaded sleeve 24 can translate on its outer wall, and then a plurality of first struts 25 and second struts 210 expand until a plurality of second support plates 27 and arc-shaped scraping plates 29 are limited and pressed against the inner wall of the pipeline. Synchronously, the second gear 111 is rotated by the rotating fourth gear 213, and then the first gear 110 rotates to drive the gear ring 109 to drive the third limiting ring 106 to rotate, so that the connecting rod 108 is restricted by the deflected arc-shaped limiting groove 107 to drive the slider 103 and the sliding rod 104 to slide inside the second limiting ring 102, and then the support height of the driving wheel 105 is adjusted until a plurality of driving wheels 105 are attached to the inner wall of the pipeline for independent movement. Then, during actual work, the device moves more stably, and during the movement, the impurities on the inner wall of the pipeline are scraped again.

[0037] A dredging method for a dredging device used in water conservancy projects, the specific operation steps are as follows:

[0038] Step 1: First, insert the whole device into the inner part of the water conservancy pipeline, and then start the first motor 214 to drive the fourth gear 213 to rotate, so that the second gear 111 drives the first gear 110 to rotate, and the third limiting ring 106 deflects to drive the connecting rod 108 to drive the slider 103 and the sliding rod 104 to slide in the inner cavity of the second limiting ring 102 until a plurality of driving wheels 105 are limited and pressed against the inner wall of the pipeline, so as to perform preliminary limit installation on the device;

[0039] Step 2: When the fourth gear 213 rotates in combination with the rotation in Step 1 to make the third gear 22 rotate synchronously, the threaded rod 23 can be made to rotate, and then the threaded sleeve 24 translates on the outer wall of the threaded rod 23, and then the first strut 25 drives the second strut 210 to deflect until a plurality of arc-shaped scraping plates 29 are limited and pressed against the inner wall of the pipeline. At this time, when the driving wheels 105 are started to move, a plurality of arc-shaped scraping plates 29 can move on the inner wall of the pipeline and perform scraping treatment on the impurities on the inner wall of the pipeline;

[0040] Step 3: Combining with Step 2, while starting the driving wheel 105 to move, start the second motor 32 to drive the first supporting frame 31 to drive the second supporting frame 33, so that the conical crushing roller 34 rotates inside the pipeline to crush and stir the dried sludge blocks inside the pipeline;

[0041] Step 4: Combining with Step 3, the rotating conical crushing roller 34 drives the fifth gear 37 to rotate, so that multiple sixth gears 43 can synchronously drive the rollers 42 and the crushing blades 44 to rotate on the outer wall of the second sleeve 35, and then rotate and stir in multiple directions inside the pipeline, so that the surroundings of the crushed sludge blocks in the central part of the pipeline can be crushed again, and then quickly crush the dried sludge blocks inside the pipeline;

[0042] Step 5: As the second sleeve 35 and the conical cover plate 36 continuously move inside the pipeline, when they come into contact with the sludge to be crushed by the crushing blades 44 and the conical crushing roller 34, they can scrape and pull out the sludge from the pipeline along the trend, and then clean out the sludge inside the pipeline.

[0043] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object to be described changes, the relative position relationship may change;

[0044] Second: In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0045] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dredging device for water conservancy projects, comprising a moving mechanism (1). One side of the moving mechanism (1) is fixedly connected with an auxiliary mechanism (2). The interior of the moving mechanism (1) is provided with a first crushing mechanism (3), and the outer wall of the first crushing mechanism (3) is provided with a plurality of second crushing mechanisms (4). It is characterized in that: The moving mechanism (1) includes a first limiting ring (101). The auxiliary mechanism (2) includes a first sleeve (21) rotatably installed inside the first limiting ring (101). One side of the first sleeve (21) is fixedly connected with a threaded rod (23). The interiors of both the first sleeve (21) and the threaded rod (23) are hollow. And the first crushing mechanism (3) includes a first supporting frame (31) rotatably installed inside the first sleeve (21) and the threaded rod (23). One end of the first supporting frame (31) is fixedly connected with a second motor (32) for driving it to rotate. The end of the first supporting frame (31) away from the second motor (32) is fixedly connected with a second supporting frame (33). One end of the second supporting frame (33) is fixedly connected with a conical crushing roller (34). A second sleeve (35) is rotatably installed on the side of the conical crushing roller (34) close to the second supporting frame (33). A conical cover plate (36) is fixedly installed on the side of the second sleeve (35) away from the conical crushing roller (34). The second sleeve (35) is rotatably installed on the outer wall of the threaded rod (23). A fifth gear (37) is fixedly installed on the outer wall of the conical crushing roller (34). The second crushing mechanism (4) includes a support plate (41) fixedly installed on the outer wall of the second sleeve (35). A roller (42) is rotatably installed on one side of the support plate (41). One end of the roller (42) is fixedly connected with a sixth gear (43) meshing with the fifth gear (37). A plurality of crushing blades (44) are fixedly installed on the outer wall of the roller (42) at equal intervals in a circular shape in sequence.

2. The dredging device for water conservancy projects according to claim 1, wherein: The number of the rollers (42) is set to be multiple, and the multiple rollers (42) are arranged at equal intervals in a circular shape around the outer wall surface of the second sleeve (35).

3. The dredging device for water conservancy projects according to claim 2, characterized in that: A threaded sleeve (24) is engaged with the outer wall of the threaded rod (23). A plurality of first struts (25) are hinged to the outer wall of the threaded sleeve (24). One side of each of the plurality of first struts (25) is hinged with a first support plate (26). A second support plate (27) is fixedly installed on the top of the first support plate (26). A second strut (210) is hinged to one side of the second support plate (27). A limiting sleeve (211) is hinged to the side of the second strut (210) away from the second support plate (27). The limiting sleeve (211) is rotatably installed on the outer wall of the threaded rod (23), and a connecting frame (212) is fixedly installed between the limiting sleeve (211) and the first sleeve (21).

4. The dredging device for water conservancy projects according to claim 3, characterized in that: The second support plate (27) is arranged in a parallel state with the first support plate (26). An inflatable airbag (28) is fixedly installed on the outer wall of the second support plate (27), and an arc-shaped scraping plate (29) is fixedly installed on the outer wall of the inflatable airbag (28).

5. The dredging device for water conservancy projects according to claim 4, characterized in that: A second limiting ring (102) is fixedly installed on the outer wall of the first limiting ring (101). A plurality of sliders (103) are slidably installed inside the second limiting ring (102). A slide rod (104) is fixedly connected to one side of each of the plurality of sliders (103), and a driving wheel (105) is fixedly installed on one side of each of the plurality of slide rods (104). A third limiting ring (106) is rotatably installed on one side of the first limiting ring (101). An arc-shaped limiting groove (107) is formed inside the third limiting ring (106). A connecting rod (108) fixedly connected to the slider (103) is slidably installed inside the arc-shaped limiting groove (107).

6. The dredging device for water conservancy projects according to claim 5, wherein: A gear ring (109) is fixedly installed on the inner wall of the third limiting ring (106). A first gear (110) meshing with the gear ring (109) is rotatably installed on one side of the first limiting ring (101). A second gear (111) is fixedly connected to one side of the first gear (110). A third gear (22) is fixedly installed on the outer wall of the first sleeve (21). A fourth gear (213) meshes with the outer wall of the third gear (22). The fourth gear (213) is meshed with the second gear (111). One end of the fourth gear (213) passing through the first limiting ring (101) is fixedly connected to a first motor (214) for driving its rotation.

7. A dredging method for the dredging device for water conservancy projects as described in claim 6, characterized in that, The specific operation steps are as follows: First step: First, insert the whole device into the internal part of the water conservancy pipeline, and then start the first motor (214) to drive the fourth gear (213) to rotate, so that the second gear (111) drives the first gear (110) to rotate, and the third limiting ring (106) deflects to drive the connecting rod (108) to drive the slider (103) and the slide rod (104) to slide in the inner cavity of the second limiting ring (102) until the plurality of driving wheels (105) are limited and pressed against the inner wall of the pipeline, then the initial limiting installation of the device can be completed; Second step: When the fourth gear (213) rotates in combination with the first step to make the third gear (22) rotate synchronously, the threaded rod (23) can be made to rotate, and then the threaded sleeve (24) translates on the outer wall of the threaded rod (23), and then the first support rod (25) drives the second support rod (210) to deflect until the plurality of arc-shaped scraping plates (29) are limited and pressed against the inner wall of the pipeline. At this time, when the driving wheels (105) are started to move, the plurality of arc-shaped scraping plates (29) can move on the inner wall of the pipeline and perform the scraping work on the impurities on the inner wall of the pipeline; Step 3: Combining with Step 2, while starting the driving wheel (105) to move, start the second motor (32) to make the first supporting bracket (31) drive the second supporting bracket (33) so that the conical crushing roller (34) rotates inside the pipeline to crush and agitate the dried sludge blocks inside the pipeline; Step 4: Combining with Step 3, the rotating conical crushing roller (34) drives the fifth gear (37) to rotate, which can make multiple sixth gears (43) synchronously drive the roller (42) and the crushing blades (44) to rotate on the outer wall of the second sleeve (35), and then rotate and agitate in multiple directions inside the pipeline, so that the surroundings of the crushed sludge blocks in the central part of the pipeline can be crushed again, and then quickly crush the dried sludge blocks inside the pipeline; Step 5: As the second sleeve (35) and the conical cover plate (36) continuously move inside the pipeline, when they come into contact with the sludge to be crushed by the crushing blades (44) and the conical crushing roller (34), they can scrape and pull out the sludge from the pipeline along the trend, and then clean out the sludge inside the pipeline.

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