A dredging device for hydraulic engineering construction

Abstract

The application discloses a dredging device for hydraulic engineering construction and belongs to the field of dredging equipment, which comprises a separation box, a fixed ring is fixedly installed on the inner wall of one side of the separation box; further comprising: a separation assembly, the separation assembly comprises a filter roller which is rotatably installed on the inner wall of the fixed ring, the other end of the filter roller penetrates through the separation box and is rotatably installed with the separation box, a motor is fixedly installed on one side of the separation box, the inner wall of the filter roller is fixedly installed with the output end of the motor, a heating pipe is fixedly installed on the top wall of the inner cavity of the separation box, and a feeding pipe is arranged above the motor; the viscosity of the sludge can be reduced, the sludge can flow more easily in the filter roller and be uniformly distributed, the whole filter area can be effectively utilized, the dehydration efficiency is further improved, the drying efficiency of the sludge is improved, and the solid-liquid separation effect is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of dredging equipment, and more specifically, to a dredging device for use in water conservancy engineering construction. Background Technology

[0002] Hydraulic engineering is an engineering and technical discipline concerning the development, utilization, and protection of water resources. It mainly involves flood control, irrigation, water supply, hydropower generation, and ecological environmental protection. As suspended matter in water bodies gradually deposits and forms silt when the water flow slows down or becomes still, this phenomenon is particularly common in rivers and lakes. In order to maintain smooth water flow and remove the sediment, silt, and other debris deposited at the bottom of water bodies, and to prevent increased flood risk or damage to the function of hydraulic engineering facilities due to siltation, dredging is one of the important links to ensure the normal operation of hydraulic engineering projects.

[0003] In the regular management of urban rivers, it is usually required to complete the removal of a large amount of silt within a limited time window and quickly restore the function of the water area. However, for silt types with high viscosity and high water content, the treatment process can often only remove surface water and is powerless to remove the bound water between the particles. This results in a high water content in the final product, making it difficult to achieve efficient solid-liquid separation. Natural drying or simple mechanical dehydration is usually relied upon, but this is often inefficient, time-consuming, and requires a large space. In addition, the effect of natural drying is greatly reduced, especially in cold or humid environments. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a dredging device for water conservancy engineering construction, which can reduce the viscosity of sludge, making it easier to flow in the filter drum and distribute it evenly, ensuring that the entire filtration area is effectively utilized, further improving the dewatering efficiency, and also improving the drying efficiency of sludge, thereby significantly improving the solid-liquid separation effect.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A dredging device for water conservancy engineering construction includes a separation box, wherein a fixing ring is fixedly installed on one inner wall of the separation box;

[0007] Also includes:

[0008] A separation assembly includes a filter roller rotatably mounted on the inner wall of a fixed ring, the other end of the filter roller penetrating the separation chamber and rotatably mounted thereto. A motor is fixedly mounted on one side of the separation chamber, and the inner wall of the filter roller is fixedly mounted to the output end of the motor. A heating tube is fixedly mounted on the top wall of the inner cavity of the separation chamber. A feed pipe is provided above the motor, and the bottom end of the feed pipe penetrates the separation chamber and communicates with the inside of the fixed ring. A discharge pipe is fixedly mounted on one side of the bottom of the separation chamber, and a cleaning assembly is provided inside the filter roller.

[0009] Furthermore, the cleaning assembly includes a scraper first that contacts the top wall of the inner cavity of the filter drum. A fixing tube is fixedly installed on the side of the scraper first away from the fixing ring. The other end of the fixing tube passes through the separation box and communicates with the inner cavity of the separation box. A cavity is opened inside the scraper first, and the cavity communicates with the inner cavity of the fixing tube. The bottom of the scraper first has evenly spaced slots that communicate with the cavity. A gear ring is fixedly installed on the outer wall of the filter drum near the fixing ring. A pinion gear is meshed on the upper part of the gear ring. The pinion gear is rotatably installed on the inner wall of the separation box. A rotating rod is fixedly installed on the side of the pinion gear near the fixing tube. The other end of the rotating rod extends into the fixing tube and a fan blade is fixedly installed thereon.

[0010] Furthermore, the inner cavity of the filter roller is provided with a rotating rod, one end of which is fixedly installed to the output end of the motor. The rotating rod has a reciprocating thread on its wall, and a fixing block is threaded onto the reciprocating thread. Sealing tubes are fixedly installed at both ends of the fixing block. Both sets of sealing tubes are sleeved on the wall of the rotating rod. Scrapers II are evenly fixedly installed on the top of the two sets of sealing tubes. Each set of scrapers II has a groove, and the inner wall of each set of grooves is slidably installed with the front and rear side walls of scraper I.

[0011] Furthermore, each set of grooves has an elastic rod fixedly installed on the bottom wall of its inner cavity, and each set of elastic rods has a ball bearing rolled on its top end, with each set of ball bearings contacting the inner wall of the adjacent groove.

[0012] Furthermore, a large gear is meshed and installed at the lower part of the filter roller. The large gear is rotatably installed on the inner wall of the separation box. A fixing rod is fixedly installed on the other side of the large gear. Mounting plates are provided on both the upper and lower sides of the fixing rod. Both sets of mounting plates are fixedly installed on the inner wall of the separation box. T-shaped rods are slidably installed on both sets of mounting plates. Movable blocks are fixedly installed on the opposite sides of both sets of T-shaped rods. Return springs are fixedly installed between both sets of movable blocks and adjacent mounting plates. Ball bearings are rolled on the opposite sides of both sets of movable blocks.

[0013] Furthermore, a magnet is fixedly installed on the front wall of the fixing rod, and both sets of T-shaped rods are made of magnetically attractive material.

[0014] Furthermore, the bottom of the filter roller and the inner wall of the separation chamber are respectively in contact with the adjacent balls, and both sets of return springs are in a compressed state in their initial state.

[0015] Furthermore, the magnetic attraction force of the magnet block must be greater than the elastic force of the reset spring.

[0016] Furthermore, the bottom wall of the inner cavity of each set of grooves is inclined.

[0017] Furthermore, the distance between two adjacent sets of scrapers should be less than the length of the reciprocating thread.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) This solution uses a filter drum to drive a gear ring to rotate, which in turn drives the fan blades to rotate rapidly. The gas heated around the heating tube is drawn into the inner cavity of the filter drum through the slot. This, combined with the external heating of the heating tube, can effectively improve the heating efficiency. Heating reduces the viscosity of the sludge, making it easier to flow. At the same time, the lower viscosity sludge is more likely to be evenly distributed in the filter drum, ensuring that the entire filtration area is effectively utilized, further improving the dewatering efficiency. Heating can also directly increase the kinetic energy of water molecules in the sludge, reduce the viscosity of water, and accelerate the evaporation rate of water from between sludge particles, thereby effectively improving the drying efficiency of the sludge and significantly improving the efficiency of solid-liquid separation.

[0020] (2) In this scheme, while the rotating rod rotates, the reciprocating thread will drive the fixed block to move back and forth on the rod wall of the sealing tube. This allows each set of scrapers 2 to slide back and forth on the front and rear side walls of scraper 1, which can scrape the outer wall of scraper 1. This can scrape off the sludge remaining on the inner wall of the filter drum of scraper 1, which plays a self-cleaning role for scraper 1. This can effectively prevent sludge from adhering to its surface, which will eventually lead to gradual accumulation and reduce its working efficiency or even complete failure. This can ensure the cleanliness of scraper 1. A clean scraper 1 can more effectively remove sludge from the surface of the filter screen, ensuring that the filter holes are not blocked, thereby maintaining a high dewatering efficiency.

[0021] (3) During the reciprocating motion of scraper 2, the elastic rod drives ball 1 to reciprocate and impact the groove on the moving path, which can continuously generate vibration on scraper 1. The vibration can effectively destroy the adhesion between sludge and scraper 1 and improve the fluidity of sludge remaining on scraper 1, making it easier for sludge to fall off the surface of scraper 1. At the same time, with the cooperation of scraper 2 to scrape and clean it, the cleaning efficiency is further improved, the need for manual cleaning is significantly reduced, the downtime is reduced, and the continuous operation capability of the equipment is improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0023] Figure 2 This is a cross-sectional view of the separation box of the present invention;

[0024] Figure 3 This is a cross-sectional view of the filter roller of the present invention;

[0025] Figure 4 This is an overall sectional view of the present invention;

[0026] Figure 5 For the present invention Figure 4 Enlarged view of the structure of section A in the middle;

[0027] Figure 6 For the present invention Figure 4 Enlarged view of the structure of section B in the middle;

[0028] Figure 7 For the present invention Figure 4 Enlarged view of the structure of section C.

[0029] Explanation of the labels in the diagram:

[0030] 1. Separation box; 2. Fixing ring; 3. Filter roller; 4. Motor; 5. Heating tube; 6. Fixing tube; 7. Scraper 1; 8. Gear ring; 9. Pinion; 10. Rotating rod; 11. Fan blade; 12. Cavity; 13. Feed pipe; 14. Rotating rod; 15. Fixing block; 16. Sealing tube; 17. Reciprocating thread; 18. Scraper 2; 19. Elastic rod; 20. Ball bearing 1; 21. Groove; 22. Large gear; 23. Mounting plate; 24. T-shaped rod; 25. Movable block; 26. Return spring; 27. Ball bearing 2; 28. Magnet block; 29. ​​Fixing rod; 30. Discharge pipe; 31. Groove. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 7 A dredging device for water conservancy engineering construction includes a separation box 1, and a fixing ring 2 is fixedly installed on one inner wall of the separation box 1.

[0033] Also includes:

[0034] The separation assembly includes a filter roller 3 rotatably mounted on the inner wall of the fixed ring 2. The other end of the filter roller 3 passes through the separation box 1 and is rotatably mounted with the separation box 1. A motor 4 is fixedly mounted on one side of the separation box 1. The inner wall of the filter roller 3 is fixedly mounted with the output end of the motor 4. A heating tube 5 is fixedly mounted on the top wall of the inner cavity of the separation box 1. A feed pipe 13 is provided above the motor 4. The bottom end of the feed pipe 13 passes through the separation box 1 and communicates with the inside of the fixed ring 2. A discharge pipe 30 is fixedly mounted on one side of the bottom of the separation box 1. A cleaning assembly is provided inside the filter roller 3.

[0035] The cleaning assembly includes a scraper 7 that contacts the top wall of the inner cavity of the filter roller 3. A fixed tube 6 is fixedly installed on the side of the scraper 7 away from the fixed ring 2. The other end of the fixed tube 6 passes through the separation box 1 and communicates with the inner cavity of the separation box 1. A cavity 12 is opened in the scraper 7 and communicates with the inner cavity of the fixed tube 6. The bottom of the scraper 7 is evenly provided with slots 21 that communicate with the cavity 12. A gear ring 8 is fixedly installed on the outer wall of the filter roller 3 near the fixed ring 2. A pinion 9 is meshed on the upper part of the gear ring 8 and is rotatably installed on the inner wall of the separation box 1. A rotating rod 10 is fixedly installed on the side of the pinion 9 near the fixed tube 6. The other end of the rotating rod 10 extends into the fixed tube 6 and is fixedly installed with a fan blade 11.

[0036] First, the discharge end of the sludge extraction pump is connected to the inlet pipe 13. The pump extracts sludge from the urban river and discharges it into the inlet pipe 13. Simultaneously, the motor 4 is turned on, and the output end of the motor 4 drives the filter drum 3 to rotate slowly. The sludge discharged into the inlet pipe 13 falls into the filter drum 3 through the fixing ring 2. The filter drum 3 is installed at a certain angle, which helps the liquid flow under the action of gravity. When the filter drum 3 rotates, the sludge is sent into the interior of the filter drum 3. As the filter drum 3 rotates, the water in the sludge flows out through the filter screen holes on the filter drum 3. The water in the sludge flows onto the bottom wall of the inner cavity of the separation box 1. Since the separation box 1 is also installed at an angle, the water on the bottom wall of the inner cavity of the separation box 1 will gradually flow to the right and eventually be discharged through the discharge pipe 30, while the solid particles remain inside the filter drum 3. The filter drum 3 is inclined. After dewatering, the sludge gradually moves towards the lower end and is eventually discharged from the right end of the filter drum 3, thus achieving solid-liquid separation. When the heating tube 5 is turned on, the heating tube 5 converts electrical energy into heat energy to heat the filter drum 3. As the temperature rises, the viscosity of the sludge inside the filter drum 3 usually decreases. This not only facilitates the rapid discharge of water but also prevents the sludge from excessively adhering or forming a hard shell inside the drum, maintaining good material flowability. With the rotation of the filter drum 3, uniform heating of the filter drum 3 can be achieved. At the same time, the lower viscosity sludge is more easily evenly distributed inside the filter drum 3, ensuring that the entire filtration area is effectively utilized, further improving dewatering efficiency. Heating can also directly increase the kinetic energy of water molecules in the sludge, reduce the viscosity of water, and accelerate the evaporation rate of water from between sludge particles, thereby significantly improving the efficiency of solid-liquid separation.

[0037] As the filter drum 3 rotates, the scraper 7 scrapes away the sludge remaining on the top of its inner cavity. The scraper 7 effectively removes the sludge adhering to the filter screen surface, preventing clogging of the filter holes. By scraping away the sludge on the inner wall, the thickness of the sludge layer is reduced, making it easier for water to pass through the filter screen and further reducing the water content of the treated sludge. Simultaneously, the rotation of the filter drum 3 drives the gear ring 8 to rotate synchronously. The rotation of the gear ring 8 drives the pinion 9 to rotate rapidly. Simultaneously, the rotation of the pinion 9 drives the fan blades 11 to rotate synchronously via the rotating rod 10. This rapid rotation of the fan blades 11 generates suction on the top of the inner cavity of the separation box 1 through the fixed pipe 6, drawing the heated gas around the heating pipe 5 into the fixed pipe 6. The gas in the fixed pipe 6 is discharged into the cavity 12, and the gas in the cavity 12 is finally discharged into the inner cavity of the filter drum 3 through the slots 21. At this time, the inside of the filter drum 3 can be heated. In combination with the external heating of the heating pipe 5, the heating efficiency can be effectively improved, thereby effectively improving the drying efficiency of the sludge. Heating reduces the viscosity of the sludge, making it easier to flow. Meanwhile, the scraper 7 can effectively remove the dry layer or hard shell formed on the inner wall of the filter drum 3, ensuring that moisture continues to evaporate from the sludge and is discharged through the filter screen, significantly accelerating the dehydration speed. By combining heating and scraper 7, not only can the moisture in the sludge be removed more thoroughly, but the consistency and quality of the final product can also be improved, creating favorable conditions for subsequent processing steps such as transportation, storage or resource recycling.

[0038] like Figures 3 to 6 As shown, the inner cavity of the filter roller 3 is provided with a rotating rod 14. One end of the rotating rod 14 is fixedly installed with the output end of the motor 4. The rod wall of the rotating rod 14 is provided with a reciprocating thread 17. A fixing block 15 is threaded on the reciprocating thread 17. Both ends of the fixing block 15 are fixedly installed with sealing tubes 16. Both sets of sealing tubes 16 are sleeved on the rod wall of the rotating rod 14. Scrapers 18 are evenly fixedly installed on the top of the two sets of sealing tubes 16. Each set of scrapers 18 has a groove 31. The inner cavity wall of each set of grooves 31 is slidably installed with the front and rear side walls of the scraper 7.

[0039] Each set of grooves 31 has an elastic rod 19 fixedly installed on the bottom wall of its inner cavity. Each set of elastic rods 19 has a ball bearing 20 rolled on its top end. Each set of ball bearings 20 is in contact with the inner wall of the adjacent groove 21.

[0040] While the output end of motor 4 rotates, it also drives the rotating rod 14 to rotate synchronously. As the rotating rod 14 rotates, it drives the fixed block 15 to move back and forth on the rod wall of the sealing tube 16 through the reciprocating thread 17. While the fixed block 15 moves, it drives each set of scraper blades 18 to move synchronously through the two sets of sealing tubes 16. At this time, each set of scraper blades 18 can slide back and forth on the front and rear side walls of scraper blade 7, which can scrape the outer wall of scraper blade 7. It can scrape off the sludge remaining on the inner wall of the filter drum 3, which plays a self-cleaning role for scraper blade 7. It can effectively prevent sludge from adhering to its surface, which will eventually lead to gradual accumulation and reduce its working efficiency or even complete failure. It can ensure the cleanliness of scraper blade 7. A clean scraper blade 7 can more effectively remove sludge from the surface of the filter screen, ensuring that the filter holes are not blocked, thereby maintaining a high dewatering efficiency.

[0041] While the two sets of sealing tubes 16 drive the scrapers 18 to reciprocate left and right, the scrapers 18 drive the elastic rods 19 and the balls 20 on them to move synchronously. When the scrapers 18 drive the elastic rods 19 to move the balls 20 out of the inner cavity of the slot 21, the balls 20 will move into the bottom of the scrapers 7. At this time, the elastic rods 19 are in a bent state. When the balls 20 move into the position of the next set of slots 21, under the force of the elastic rods 19, the elastic rods 19 return to their initial state and drive the balls 20 into the inner cavity of the slot 21 at this position. During the reciprocating motion of scraper 18, elastic rod 19 drives ball bearing 20 to repeatedly impact the slot 21 on the moving path, continuously vibrating scraper 7. This vibration effectively breaks the adhesion between the sludge and scraper 7, and improves the fluidity of the sludge remaining on scraper 7, making it easier for the sludge to fall off the surface of scraper 7. At the same time, with the scraping and cleaning action of scraper 18, the cleaning efficiency is further improved, the need for manual cleaning is significantly reduced, downtime is reduced, and the continuous operation capability of the equipment is improved.

[0042] like Figure 7 As shown, a large gear 22 is meshed and installed at the lower part of the filter roller 3. The large gear 22 is rotatably installed on the inner wall of the separation box 1. A fixing rod 29 is fixedly installed on the other side of the large gear 22. Mounting plates 23 are provided on both the upper and lower sides of the fixing rod 29. Both sets of mounting plates 23 are fixedly installed on the inner wall of the separation box 1. T-shaped rods 24 are slidably installed on the two sets of mounting plates 23. Movable blocks 25 are fixedly installed on the opposite sides of the two sets of T-shaped rods 24. Return springs 26 are fixedly installed between the two sets of movable blocks 25 and the adjacent mounting plates 23. Ball bearings 27 are rolled on the opposite sides of the two sets of movable blocks 25.

[0043] A magnet 28 is fixedly installed on the front wall of the fixing rod 29, and both sets of T-shaped rods 24 are made of magnetic material.

[0044] The bottom of the filter roller 3 and the inner wall of the separation box 1 are respectively in contact with the adjacent ball bearings 27, and the two sets of return springs 26 are in a compressed state in the initial state.

[0045] As the filter roller 3 rotates, it drives the gear ring 8 to rotate, which in turn drives the large gear 22 to rotate. The rotation of the large gear 22, via the fixed rod 29, drives the magnet block 28 to rotate synchronously. When the magnet block 28 rotates to the position directly below the upper T-shaped rod 24, the upper T-shaped rod 24 enters the magnetic attraction range of the magnet block 28. The magnet block 28 attracts the upper T-shaped rod 24, causing the movable block 25 on it to move downward and press the return spring 26. As the upper movable block 25 moves downward, it causes the second ball 27 on it to move away from the bottom of the filter roller 3. When the fixed rod 29 drives the magnet block 28 to rotate and move out of the position directly below the upper T-shaped rod 24, the magnet block 28 moves out of the magnetic attraction range of the upper T-shaped rod 24. Under the force of the upper return spring 26, the return spring 26 returns to its initial state, which pushes the upper movable block 25, causing the second ball 27 on it to move upward and impact the filter roller. At the bottom of the cylinder 3, the upper ball bearings 27 are rolled on the movable block 25, which ensures that the filter cylinder 3 is not affected by impacts during rotation. The same principle applies when the magnet block 28 rotates to the top of the lower T-shaped rod 24. The lower ball bearings 27 will impact the bottom wall of the inner cavity of the separation box 1. At this time, during the reciprocating rotation of the magnet block 28, the upper and lower sets of ball bearings 27 will reciprocate to impact the bottom of the filter cylinder 3 and the bottom wall of the inner cavity of the separation box 1, respectively, which can generate vibration on the filter cylinder 3 and the separation box 1. Vibration can help loosen the sludge layer, which can facilitate the heating and drying of the sludge and make it easier for water to be discharged through the filter screen, thereby accelerating the solid-liquid separation process. Through continuous vibration, the dried sludge in the filter cylinder 3 and the water filtered into the separation box 1 can be quickly transported to the lower end, which can effectively improve the discharge efficiency and thus effectively improve the working effect.

[0046] like Figures 5 to 7 As shown, the magnetic attraction force of the magnet 28 is greater than the elastic force of the return spring 26.

[0047] The bottom wall of the inner cavity of each groove 31 is inclined.

[0048] The distance between two adjacent scraper sets 18 should be less than the length of the reciprocating thread 17.

[0049] The bottom wall of the inner cavity of the groove 31 is inclined so that the sludge falling into the inner cavity of the groove 31 can slide off automatically, avoiding the accumulation of sludge residue. The distance between two adjacent sets of scraper blades 18 is less than the length of the reciprocating thread 17, so that when the sealing tube 16 drives the scraper blades 18 to move back and forth, they will move to the position of the adjacent scraper blades 18, so that when each set of scraper blades 18 scrapes and cleans the outer wall of the scraper blade 7, no part will be missed.

[0050] Working principle: First, the filter holes on the filter drum 3 are located between the left side wall of the scraper 7 and the right side wall of the inner cavity of the separation box 1. The discharge end of the sludge extraction pump is installed together with the feed pipe 13. The extraction pump will extract the sludge from the urban river and discharge it into the filter drum 3 through the feed pipe 13. The motor 4 and the heating pipe 5 are turned on. The motor 4 will drive the filter drum 3 to rotate, and the heating pipe 5 will heat the filter drum 3. The filter drum 3 will drive the pinion 9 to rotate rapidly through the gear ring 8, which will allow the fan blades 11 to discharge the heated gas around the heating pipe 5 into the cavity 12, and then into the filter drum 3 through the slot 21, thereby heating the inside of the filter drum 3 and improving the drying efficiency of the sludge. The moisture will flow through the filter holes on the filter drum 3 to the bottom wall of the inner cavity of the separation box 1, and then be discharged by the scraper 7. To achieve the scraping of sludge off the inner wall of the filter drum 3, the motor 4 also drives the rotating rod 14 to move each set of scraper blades 18 back and forth, scraping and cleaning the outer wall of the scraper blade 7. At the same time, during the movement, the elastic rod 19 causes the ball bearings 20 to reciprocate and impact the slot 21, which can cause the scraper blade 7 to vibrate. The rotation of the filter drum 3 also drives the large gear 22 to rotate through the gear ring 8. The large gear 22 drives the magnet block 28 to rotate. With the cooperation of the T-shaped rod 24 and the return spring 26, the upper and lower sets of ball bearings 27 will reciprocate and impact the bottom of the filter drum 3 and the bottom wall of the inner cavity of the separation box 1, respectively, which can generate vibration of the filter drum 3 and the separation box 1. This facilitates the rapid transport of the dried sludge in the filter drum 3 and the water filtered into the separation box 1 to the lower end for separation and removal.

[0051] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A dredging device for water conservancy engineering construction, comprising a separation box (1), wherein a fixing ring (2) is fixedly installed on one inner wall of the separation box (1); Its features are: Also includes: The separation assembly includes a filter roller (3) rotatably mounted on the inner wall of the fixed ring (2), the other end of the filter roller (3) penetrating the separation box (1) and rotatably mounted with the separation box (1), a motor (4) fixedly mounted on one side of the separation box (1), the inner wall of the filter roller (3) fixedly mounted with the output end of the motor (4), a heating tube (5) fixedly mounted on the top wall of the inner cavity of the separation box (1), a feed pipe (13) provided above the motor (4), the bottom end of the feed pipe (13) penetrating the separation box (1) and communicating with the inside of the fixed ring (2), a discharge pipe (30) fixedly mounted on one side of the bottom of the separation box (1), and a cleaning assembly provided inside the filter roller (3); The cleaning assembly includes a scraper (7) that contacts the top wall of the inner cavity of the filter roller (3). A fixing tube (6) is fixedly installed on the side of the scraper (7) away from the fixing ring (2). The other end of the fixing tube (6) passes through the separation box (1) and communicates with the inner cavity of the separation box (1). A cavity (12) is opened in the scraper (7), and the cavity (12) communicates with the inner cavity of the fixing tube (6). The bottom of the scraper (7) is evenly provided with grooves that are in contact with the top wall of the inner cavity of the filter roller (3). The cavity (12) is connected to the slot (21). A gear ring (8) is fixedly installed on the outer wall of the filter roller (3) near the fixed ring (2). A small gear (9) is meshed on the upper part of the gear ring (8). The small gear (9) is rotatably installed on the inner wall of the separation box (1). A rotating rod (10) is fixedly installed on the side of the small gear (9) near the fixed tube (6). The other end of the rotating rod (10) extends into the fixed tube (6) and a fan blade (11) is fixedly installed. The filter roller (3) has a rotating rod (14) in its inner cavity. One end of the rotating rod (14) is fixedly installed to the output end of the motor (4). The rotating rod (14) has a reciprocating thread (17) on its wall. A fixing block (15) is threaded onto the reciprocating thread (17). Sealing tubes (16) are fixedly installed at both ends of the fixing block (15). Both sets of sealing tubes (16) are sleeved on the wall of the rotating rod (14). Scrapers (18) are evenly fixedly installed on the top of both sets of sealing tubes (16). Each set of scrapers (18) has a groove (31) on it. The inner wall of each groove (31) is slidably installed with the front and rear side walls of the scraper (7). Each set of grooves (31) has an elastic rod (19) fixedly installed on the bottom wall of the inner cavity. Each set of elastic rods (19) has a ball bearing (20) rolled on the top of the top of the elastic rod (19). Each set of ball bearings (20) is in contact with the inner wall of the adjacent groove (21).

2. The dredging device for water conservancy engineering construction according to claim 1, characterized in that: A large gear (22) is meshed with the lower part of the filter roller (3). The large gear (22) is rotatably installed on the inner wall of the separation box (1). A fixing rod (29) is fixedly installed on the other side of the large gear (22). Mounting plates (23) are provided on both the upper and lower sides of the fixing rod (29). Both sets of mounting plates (23) are fixedly installed on the inner wall of the separation box (1). T-shaped rods (24) are slidably installed on both sets of mounting plates (23). Movable blocks (25) are fixedly installed on the opposite sides of both sets of T-shaped rods (24). Reset springs (26) are fixedly installed between both sets of movable blocks (25) and adjacent mounting plates (23). Roller balls (27) are rolled on the opposite sides of both sets of movable blocks (25).

3. A dredging device for water conservancy engineering construction according to claim 2, characterized in that: A magnet (28) is fixedly installed on the front wall of the fixed rod (29), and both sets of T-shaped rods (24) are made of magnetic material.

4. A dredging device for water conservancy engineering construction according to claim 2, characterized in that: The bottom of the filter roller (3) and the inner wall of the separation box (1) are respectively in contact with the adjacent ball bearings (27), and both sets of return springs (26) are in a compressed state in their initial state.

5. A dredging device for water conservancy engineering construction according to claim 3, characterized in that: The magnetic attraction force of the magnet block (28) is greater than the elastic force of the return spring (26).

6. A dredging device for water conservancy engineering construction according to claim 1, characterized in that: The inner wall of the groove (31) in each group is inclined.

7. A dredging device for water conservancy engineering construction according to claim 1, characterized in that: The distance between two adjacent scraper sets (18) is less than the length of the reciprocating thread (17).

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