A silt treatment device and method for river dredging

Abstract

This application relates to a silt treatment device and method for river dredging. The silt treatment device includes a silt drying rack placed on a riverbank slope. The drying rack has a support body for placing the silt, and the support body has permeable holes. Side plates are provided on both sides of the drying rack. A front plate connected between the two side plates is provided at one end of the drying rack, and a rear plate connected between the two side plates is provided at the other end of the drying rack. The front plate, rear plate, and side plates together form a drying area. The drying rack is equipped with a turning mechanism for turning the silt on the support body. This application effectively improves the drying efficiency of silt.

Description

Technical Field

[0001] This application relates to the field of river dredging technology, and in particular to a silt treatment device and a river dredging method. Background Technology

[0002] River dredging generally refers to the management of river channels and is a water conservancy project. Traditional river dredging methods are divided into two types: wet dredging and dry dredging. Wet dredging is a method of dredging using large ships and other engineering machinery when there is water in the river channel. Dry dredging is a method of dredging using excavators and other engineering machinery after the river water is pumped out.

[0003] During wet dredging operations in river channels, when dredging machinery is used to remove silt from the riverbanks, the high water content of the silt, resulting in potential pollution of roads and the surrounding environment during transportation, necessitates drying the dredged silt before transport. Traditionally, the dredged silt is piled on the riverbank for natural drying before being transported by dump trucks. However, this method has several drawbacks: natural drying is inefficient, the drying time is long, and it negatively impacts the surrounding environment. Therefore, further improvements are needed. Summary of the Invention

[0004] In order to effectively improve the drying efficiency of silt and reduce the drying time of silt, one of the purposes of this application is to provide a silt treatment device for river dredging.

[0005] The sludge treatment device for river dredging provided in this application adopts the following technical solution:

[0006] A silt treatment device for river dredging includes a silt drying rack placed on a riverbank slope. The silt drying rack is provided with a support body for placing silt, and the support body has water-permeable holes. Side plates are provided on both sides of the silt drying rack. A front plate is provided at one end of the silt drying rack and connected between the two side plates. A rear plate is provided at the other end of the silt drying rack and connected between the two side plates. The front plate, rear plate, and side plates enclose a drying area. The silt drying rack is provided with a turning mechanism for turning over the silt on the support body.

[0007] By adopting the above technical solution, the sludge dredged by the dredging machinery is discharged into the drying area on the sludge drying rack. The water in the sludge is discharged into the drying area through the water-permeable holes on the carrier. After the upper surface of the sludge is dried and dehydrated, the sludge on the carrier is turned over by the turning mechanism to achieve the turning and drying treatment of the sludge, so that the sludge is fully exposed to the air, effectively improving the drying and dehydration efficiency of the sludge.

[0008] Preferably, the turning mechanism includes a movable frame slidably connected to the side plate and a turning cylinder rotatably connected to the movable frame. The silt drying rack is provided with a sliding drive assembly for driving the movable frame to slide. The outer peripheral wall of the turning cylinder is provided with a soil loading groove. Multiple soil loading grooves are provided and distributed around the axis of the turning cylinder. The movable frame is provided with a turning drive assembly for driving the turning cylinder to rotate.

[0009] By adopting the above technical solution, the soil turning drive component drives the soil turning cylinder to rotate. The soil in front of the soil turning cylinder enters the soil loading trough of the soil turning cylinder. As the opening of the soil loading trough gradually rotates downward, the soil in the soil loading trough falls out of the soil loading trough due to its own weight and lands behind the soil turning cylinder, thus realizing the soil turning operation. The sliding drive component drives the moving frame to slide along the length of the side plate, thereby turning the soil in different positions in the drying area.

[0010] Preferably, the turning mechanism further includes a shovel plate disposed on the movable frame. The shovel plate is inclined and located at the front end of the turning cylinder. The lower part of the shovel plate abuts against the upper surface of the carrier and the upper part of the shovel plate abuts against the outer wall of the upper semicircumference of the turning cylinder.

[0011] By adopting the above technical solution, when the sliding drive assembly drives the moving frame to slide along the length of the side plate, the front shovel plate first removes the soil on the carrier, effectively reducing the possibility of silt adhering to the upper surface of the carrier. In addition, during the movement of the moving frame, the soil climbs up along the upper surface of the shovel plate and falls from the top of the shovel plate into the soil loading trough of the turning cylinder. At this time, the dry soil is above the wet soil, and with the rotation of the turning cylinder, the soil in the loading trough is poured out again. The poured-out wet soil is above the dry soil, realizing the turning of the soil, effectively improving the thoroughness of soil turning, allowing the silt to fully contact the air, and effectively improving the drying and dehydration efficiency of the silt.

[0012] Preferably, the movable frame includes a movable horizontal plate and movable vertical plates fixedly connected to the lower ends of both sides of the movable horizontal plate. The soil turning cylinder is rotatably connected between the two movable vertical plates. A connecting rod is fixedly connected between the two movable vertical plates. The lower end of the soil shovel is rotatably sleeved on the connecting rod. The movable horizontal plate / moving vertical plate is provided with an adjusting component to adjust the swing angle of the soil shovel. The rear plate has a discharge port.

[0013] By adopting the above technical solution, a connecting rod is set to provide a hinge carrier for the shovel plate. The shovel plate can be switched between vertical and inclined states by adjusting the component. When the shovel plate is in the inclined state, the soil can be shoveled and turned. When the dehydrated soil needs to be discharged, the shovel plate is rotated to the vertical state by adjusting the component. The sliding drive component drives the moving frame to move from the front plate to the rear plate. The movement of the shovel plate pushes the soil towards the discharge port for discharge.

[0014] Preferably, the movable vertical plate is provided with a vertically extending groove and a slider slidably connected to the groove. The slider is rotatably connected to a soil-turning shaft, and a soil-turning cylinder is coaxially fixedly sleeved on the soil-turning shaft. The movable vertical plate is provided with an elastic element built into the groove to force the slider to slide downward under normal conditions. A first connecting rope is provided on the side of the shovel plate away from the connecting rod. The other end of the first connecting rope is fixedly connected to the slider. When the adjusting member drives the free end of the shovel plate to rotate around the connecting rod to a vertical state, the shovel plate pulls the slider upward through the first connecting rope.

[0015] By adopting the above technical solution, the upper end of the shovel plate driven by the adjusting component rotates around the axis of the connecting rod and moves away from the turning cylinder, thereby switching the shovel plate from an inclined state (turning state) to a vertical state (pushing state). The slider is pulled upward by the first connecting rope. At this time, the elastic element undergoes elastic deformation and has elastic potential energy, so that the turning cylinder is located on the upper surface of the soil. This reduces the obstruction of the turning cylinder to the soil and effectively reduces the possibility of soil entering the soil loading trough of the turning cylinder, improving the thoroughness of soil discharge. During the process of the shovel plate switching from a vertical state (pushing state) to an inclined state (turning state), the elastic element forces the slider to move downward and reset. The adjusting component drives the upper end of the shovel plate to reset and abut against the outer wall of the upper semicircumference of the turning cylinder again, restricting the upward sliding freedom of the slider and reducing the possibility of the turning cylinder swaying up and down during the turning operation.

[0016] Preferably, the shovel plate has a first feeding channel, and the side wall of the shovel plate near the turning cylinder has a first discharge hole connected to the first feeding channel. The movable frame is provided with a feeding mechanism for conveying quicklime powder to the first feeding channel.

[0017] By adopting the above technical solution, during the soil-moving operation, the feeding mechanism of the shovel plate delivers quicklime powder to the first feeding channel. The quicklime powder is sprayed onto the upper surface of the carrier through the first discharge hole. The soil after the soil-turning operation is completed is covered with the quicklime powder. The quicklime powder reacts with the moisture in the soil, quickly absorbing the moisture and improving the soil dehydration efficiency. Moreover, the reaction between quicklime powder and water generates and releases heat, which can achieve the effects of disinfection, sterilization and insect control on the one hand, and rapidly increase the soil temperature on the other hand, further improving the soil dehydration efficiency. In addition, after absorbing water, quicklime will generate calcium hydroxide (magnesium hydroxide), which can neutralize the acidity in the soil, making it easier for the soil to be transported to the field for planting.

[0018] Preferably, the feeding mechanism includes a storage box fixedly connected to a movable cross plate for storing quicklime powder, a conveying air pump connected to the storage box, and a first feeding hose connected to the first feeding channel and the conveying air pump. The conveying air pump is used to convey the quicklime powder in the storage box to the first feeding channel through the first feeding hose.

[0019] By adopting the above technical solution, quicklime powder in the storage box is transported to the first feeding channel through the first feeding hose by a material conveying air pump.

[0020] Preferably, the shovel plate is slidably connected to the side wall near the turning cylinder with an anti-blocking plate. The anti-blocking plate has a second discharge hole for connecting the first discharge hole. A second connecting rope is provided between the moving horizontal plate and the anti-blocking plate. One end of the second connecting rope is fixedly connected to the moving horizontal plate, and the other end of the second connecting rope is fixedly connected to the anti-blocking plate. When the shovel plate is in a vertical state, the anti-blocking plate slides downwards under its own weight, causing the first discharge hole and the second discharge hole to be misaligned to block the first discharge hole. When the shovel plate is in an inclined state, the second connecting rope pulls the anti-blocking plate to slide away from the connecting rod, so that the first discharge hole and the second discharge hole are connected.

[0021] By adopting the above technical solution, when the shovel plate is in an inclined state (turning state), the second connecting rope is in a taut state, pulling the anti-blocking plate to slide away from the connecting rod, so that the first discharge hole and the second discharge hole are connected, which facilitates the spraying of quicklime powder. When the adjusting component drives the upper end of the shovel plate to rotate around the axis of the connecting rod and rotate away from the turning cylinder, the shovel plate is switched from the inclined state (turning state) to the vertical state (pushing state). The second connecting rope is in a slack state, and the anti-blocking plate slides down by its own weight, so that the first discharge hole and the second discharge hole are misaligned to block the first discharge hole, effectively reducing the possibility of soil entering the first feeding channel from the first discharge hole during the pushing operation.

[0022] Preferably, the turning shaft has a second feeding channel, and the inner wall of the soil-carrying trough is provided with a third discharge hole communicating with the second feeding channel. The feeding mechanism also includes a second feeding hose connected to the turning shaft through a rotary joint, and the second feeding hose is connected to the conveying air pump.

[0023] By adopting the above technical solution, during the turning operation of the turning cylinder, the quicklime powder in the storage box is transported to the second feeding channel through the second feeding hose by the conveying air pump. The quicklime powder is sprayed out through the third discharge hole. Some quicklime powder is sprayed on the upper surface of the carrier, some quicklime powder is sprayed and mixed in the middle of the soil, and some quicklime powder is sprayed on the surface of the soil after turning, which further improves the dewatering efficiency of the soil.

[0024] In order to effectively improve the drying efficiency of silt, one of the purposes of this application is to provide a silt treatment device for river dredging.

[0025] A method for dredging rivers includes the following steps:

[0026] Step S1: Construction site preparation;

[0027] Step S2: Measurement and layout;

[0028] Step S3: Slope trimming. Excavators are used to excavate and trim the slopes on both sides of the river. A silt treatment device for river dredging is installed on the trimmed slopes.

[0029] Step S4: Wet dredging of the river channel. The dredging equipment is used to excavate the silt in the river channel. The excavated silt is discharged into the silt treatment device for river dredging and dewatering.

[0030] Step S5: Mechanical transportation of silt. The dried and dehydrated silt is transferred by a transfer vehicle.

[0031] Step S6: Clean up the site.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The sludge excavated by the dredging machinery is discharged into the drying area on the sludge drying rack. The water in the sludge is discharged into the drying area through the water-permeable holes on the carrier. After the upper surface of the sludge is dried and dehydrated, the sludge on the carrier is turned over by the turning mechanism to achieve the turning and drying treatment of the sludge, so that the sludge is fully exposed to the air, effectively improving the drying and dehydration efficiency of the sludge.

[0034] 2. When the sliding drive assembly drives the moving frame to slide along the length of the side plate, the front shovel plate first removes the soil on the carrier body, effectively reducing the possibility of silt adhering to the upper surface of the carrier body. In addition, during the movement of the moving frame, the soil climbs up along the upper surface of the shovel plate and falls from the top of the shovel plate into the soil loading trough of the turning cylinder. At this time, the dry soil is above the wet soil, and with the rotation of the turning cylinder, the soil in the loading trough is poured out again. The poured-out wet soil is above the dry soil, realizing the turning of the soil, effectively improving the thoroughness of soil turning, allowing the silt to fully contact the air, and effectively improving the drying and dehydration efficiency of the silt.

[0035] 3. During the soil-moving operation, the feeding mechanism delivers quicklime powder to the first feed channel. The quicklime powder is sprayed onto the upper surface of the carrier through the first discharge hole. The soil after the soil-turning operation by the soil-turning cylinder covers the quicklime powder. The quicklime powder reacts with the moisture in the soil, quickly absorbing the moisture and improving the soil dehydration efficiency. Moreover, the reaction between quicklime powder and water generates and releases heat, which can achieve the effects of disinfection, sterilization, and insect control. On the other hand, it rapidly increases the soil temperature, further improving the soil dehydration efficiency. In addition, after absorbing water, quicklime will generate calcium hydroxide (magnesium hydroxide), which can neutralize the acidity in the soil, making it easier for the soil to be transported to the field for planting. Attached Figure Description

[0036] Figure 1This is a schematic diagram of the overall structure of a sludge treatment device for river dredging.

[0037] Figure 2 This is a schematic diagram of the material turning mechanism.

[0038] Figure 3 This is a schematic diagram of the connection structure between the movable vertical plate and the soil-turning cylinder.

[0039] Figure 4 yes Figure 3 A magnified view of the structure at point A.

[0040] Figure 5 This is a schematic diagram of the connection structure between the soil turning cylinder and the soil turning shaft.

[0041] Figure 6 This is a schematic diagram of the shovel plate.

[0042] Figure 7 This is a schematic diagram of the connection structure between the soil scraper and the anti-blocking plate.

[0043] Figure 8 This is a schematic diagram of a structure where the shovel blade is in a vertical position.

[0044] Explanation of reference numerals in the attached drawings: 1. Silt drying rack; 11. Side plate; 12. Front plate; 13. Rear plate; 131. Cover plate; 14. Drive roller; 15. Drive motor; 16. Conveyor belt; 161. Water permeable hole; 2. Turning mechanism; 21. Moving frame; 211. Moving horizontal plate; 212. Moving vertical plate; 213. Slide chute; 214. Sliding block; 215. Spring; 216. Connecting rod; 22. Soil turning cylinder; 221. Soil loading trough; 222. Third discharge hole; 23. Soil scraper; 231. First connecting rope; 232. First feeding channel. 233. First discharge hole; 234. Anti-blocking plate; 235. Second discharge hole; 236. Limiting strip; 237. Second connecting rope; 24. Tilling shaft; 241. Second feeding channel; 25. Tilling drive assembly; 251. Tilling drive motor; 252. Drive gear; 253. Driven gear; 3. Sliding drive assembly; 31. Sprocket; 32. Chain; 33. Sliding drive motor; 4. Feeding mechanism; 41. Storage box; 42. Feeding air pump; 43. First feeding hose; 44. Second feeding hose; 5. Telescopic rod. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0046] This application discloses a sludge treatment device for river dredging, referring to... Figure 1The system includes multiple silt drying racks 1 placed on the riverbank slope. Each silt drying rack 1 has a support for holding the silt. Two drive rollers 14 are rotatably connected to each silt drying rack 1, distributed along the length of the rack 1. The axial direction of the drive rollers 14 is parallel to the width of the rack 1. A drive motor 15 is fixedly connected to the silt drying rack 1 to drive the drive rollers 14. In this embodiment, the support is a conveyor belt 16 wound around the drive rollers 14, and the conveyor belt 16 has several permeable holes 161.

[0047] Both sides of the silt drying rack 1 are fixedly connected to side plates 11. One end of the silt drying rack 1 is fixedly connected to a front plate 12, which is fixedly connected between the two side plates 11. The other end of the silt drying rack 1 is fixedly connected to a rear plate 13, which is fixedly connected between the two side plates 11. The front plate 12, the rear plate 13, and the two side plates 11 enclose a drying area. The rear plate 13 has a discharge port through it. The rear plate 13 is hinged to a cover plate 131 that controls the opening and closing of the discharge port. The free end of the cover plate 131 is fixed to the outer side wall of the rear plate 13 by a buckle.

[0048] Reference Figure 1 , Figure 2 The sludge drying rack 1 is equipped with a turning mechanism 2 built into the drying area to turn the sludge on the conveyor belt 16. The turning mechanism 2 includes a movable frame 21, a shovel plate 23, and a turning cylinder 22. The movable frame 21 is built into the drying area and slidably connected to the side plate 11. The movable frame 21 includes a movable horizontal plate 211 slidably connected to the side plate 11 along the length direction of the side plate 11 and a pair of movable vertical plates 212 fixedly connected to the lower ends of both sides of the movable horizontal plate 211. The sludge drying rack 1 is equipped with a sliding drive assembly 3 for driving the movable frame 21 to slide. The sliding drive assembly 3 includes a pair of sprockets 31 rotatably connected to the upper inner side wall of the front plate 12 and the upper inner side wall of the rear plate 13, respectively; a chain 32 fixedly connected to both ends of the movable horizontal plate 211 and wound around the two sprockets 31; and a sliding drive motor 33 for driving the first sprocket 31 to rotate.

[0049] Reference Figure 2 , Figure 3The movable vertical plate 212 is provided with a vertically extending groove 213 and a slider 214 slidably connected to the groove 213. A soil-turning shaft 24 is rotatably connected between the two sliders 214. The soil-turning cylinder 22 is located between the two sliders 214 and is coaxially fixedly sleeved on the soil-turning shaft 24. The outer peripheral wall of the soil-turning cylinder 22 has a soil-loading groove 221, and multiple soil-loading grooves 221 are provided and distributed around the axis of the soil-turning cylinder 22. The movable vertical plate 212 is provided with an elastic element built into the groove 213 to force the slider 214 to slide downward under normal conditions. Specifically, the elastic element is a spring 215 built into the groove 213. One end of the spring 215 is fixedly connected to the top inner wall of the groove 213, and the other end of the spring 215 is fixedly connected to the upper end face of the slider 214.

[0050] Reference Figure 3 , Figure 4 One of the sliders 214 is equipped with a soil turning drive assembly 25 for driving the soil turning cylinder 22 to rotate. The soil turning drive assembly 25 includes a soil turning drive motor 251 fixedly embedded in the slider 214, a drive gear 252 coaxially fixedly connected to the output shaft of the soil turning drive motor 251, and a driven gear 253 coaxially fixedly sleeved on the soil turning shaft 24. The drive gear 252 meshes with the driven gear 253. During the turning operation, the rotation tangent direction of the lowest part of the soil turning cylinder 22 is the same as the forward direction of the moving frame 21.

[0051] Reference Figure 2 , Figure 3 A connecting rod 216 is fixedly connected between the lower parts of the two movable vertical plates 212. The connecting rod 216 is located in front of the soil turning cylinder 22. The lower part of the soil shovel 23 is rotatably sleeved on the connecting rod 216. The lower end of the soil shovel 23 has rounded corners, so that the lower end of the soil shovel 23 always abuts against the upper end surface of the conveyor belt 16. The movable vertical plate 212 is provided with an adjusting component for adjusting the swing angle of the soil shovel 23. In this embodiment, the adjusting component is a telescopic rod 5. One end of the telescopic rod 5 is hinged to the inner side wall of the movable vertical plate 212, and the other end of the telescopic rod 5 is hinged to the soil shovel 23. The rotation angle of the soil shovel 23 is adjusted by changing the length of the telescopic rod 5, thereby realizing the switching between the tilted state and the vertical state of the soil shovel 23. The free end of the shovel plate 23 is fixedly connected to the first connecting rope 231, and the other end of the first connecting rope 231 is fixedly connected to the upper end face of the slider 214. When the telescopic rod 5 drives the free end of the shovel plate 23 to rotate around the connecting rod 216 to a vertical state, the shovel plate 23 pulls the slider 214 upward through the first connecting rope 231, so that the soil turning cylinder 22 moves upward and gets off the upper surface of the soil.

[0052] Reference Figure 5 , Figure 6 , Figure 7The shovel plate 23 has a first feeding channel 232. The side wall of the shovel plate 23 near the soil turning cylinder 22 is provided with a first discharge hole 233 that communicates with the first feeding channel 232. The soil turning shaft 24 has a second feeding channel 241. The bottom inner wall of the soil loading trough 221 is provided with a third discharge hole 222 that communicates with the second feeding channel 241.

[0053] The outer wall of the shovel plate 23 with a first discharge hole 233 is slidably connected to an anti-blocking plate 234. The anti-blocking plate 234 has a second discharge hole 235 for connecting the first discharge hole 233. The upper outer wall of the shovel plate 23 is fixedly connected to a limiting strip 236 located above the anti-blocking plate 234. A second connecting rope 237 is provided between the moving horizontal plate 211 and the anti-blocking plate 234. One end of the second connecting rope 237 is fixedly connected to the lower end face of the moving horizontal plate 211, and the other end of the second connecting rope 237 passes through the limiting strip 236 and is fixedly connected to the upper end face of the anti-blocking plate 234. When the shovel plate 23 is in a vertical state, the second connecting rope 237 is in a slack state. The anti-blocking plate 234 slides down under its own weight until its lower end abuts against the upper surface of the conveyor belt 16. At this time, the first discharge hole 233 and the second discharge hole 235 are misaligned to block the first discharge hole 233. When the shovel plate 23 rotates and tilts towards the direction of the soil turning cylinder 22, the second connecting rope 237 straightens and pulls the anti-blocking plate 234 towards the direction of the limiting strip 236 and abuts against the limiting strip 236. The first discharge hole 233 and the second discharge hole 235 are connected, and at this time, the upper side wall of the anti-blocking plate 234 abuts against the outer wall of the upper semicircle of the soil turning cylinder 22.

[0054] Reference Figure 2 , Figure 3 The movable horizontal plate 211 is equipped with a feeding mechanism 4 for conveying quicklime powder to the first feeding channel 232 and the second feeding channel 241. The feeding mechanism 4 includes a storage box 41 fixedly connected to the movable horizontal plate 211 for storing quicklime powder, a conveying air pump 42 connected to the storage box 41, a first feeding hose 43 connecting the first feeding channel 232 and the conveying air pump 42, and a second feeding hose 44 connecting the second feeding channel 241 and the conveying air pump 42. The second feeding hose 44 is connected to the end of the turning shaft 24 through a rotary joint. The conveying air pump 42 is used to convey the quicklime powder in the storage box 41 to the first feeding channel 232 and the second feeding channel 241 through the first feeding hose 43 and the second feeding hose 44, respectively. Specifically, the rotary joint is embedded in the slider 214, and the end of the second feeding hose 44 passes through the upper part of the slider 214 and is connected to the rotary joint.

[0055] The implementation principle of the sludge treatment device for river dredging in this embodiment is as follows: In the initial state, the moving frame 21 is located on the side of the drying area near the rear plate 13, and the shovel plate 23 is in an inclined state. The sludge excavated by the dredging machinery is discharged into the drying area on the sludge drying rack 1. The drive motor 15 drives the conveyor belt 16 to rotate backward for transport, and the sludge is spread on the upper surface of the conveyor belt 16 manually. The water in the sludge is discharged from the drying area through the water permeable holes 161 on the conveyor belt 16. After the upper part of the sludge is dried and dehydrated, the sliding drive assembly 3 drives the moving frame 21 to slide towards the front plate 12. The shovel plate 23 located in front first removes the soil on the conveyor belt 16, effectively reducing the possibility of sludge adhering to the upper surface of the conveyor belt 16. In addition, During the movement of the moving frame 21, the soil climbs up along the upper surface of the shovel plate 23 and falls from the top of the shovel plate 23 into the soil loading trough 221 of the turning cylinder 22. At this time, the dry soil is above the wet soil, and with the rotation of the turning cylinder 22, the soil in the soil loading trough 221 is poured out again. The poured-out wet soil is above the dry soil, realizing the turning operation of the soil, effectively improving the thoroughness of soil turning, making the silt fully contact the air, effectively improving the drying and dehydration efficiency of the silt. The moving frame 21 slides to the drying area and stops moving near the front plate 12.

[0056] Furthermore, during the soil shoveling and turning process, the conveying air pump 42 transports the quicklime powder in the storage tank 41 to the first feeding channel 232 and the second feeding channel 241 through the first feeding hose 43 and the second feeding hose 44, respectively. The quicklime powder in the first feeding channel 232 is sprayed onto the upper surface of the conveyor belt 16 through the first discharge hole 233 and the second discharge hole 235. The quicklime powder in the first feeding channel 232 is sprayed out through the third discharge hole 222, and some of the quicklime powder is sprayed onto the conveyor belt 16. On the upper surface, some quicklime powder is sprayed and mixed into the middle of the soil, and some quicklime powder is sprayed onto the upper surface of the soil after turning. The soil covered by the quicklime powder after turning by the turning cylinder 22 reacts with the moisture in the soil, quickly absorbing the moisture and improving the dehydration efficiency of the soil. Moreover, the reaction between quicklime powder and water generates and releases heat, which can achieve the effect of disinfection, sterilization and insect control on the one hand, and rapidly increase the soil temperature on the other hand, further improving the dehydration efficiency of the soil.

[0057] Reference Figure 8When the soil after drying and dehydration needs to be discharged, the piston rod of the telescopic rod 5 extends and drives the free end of the shovel plate 23 to rotate around the axis of the connecting rod 216 and rotate away from the turning cylinder 22, so that the shovel plate 23 switches from the inclined state (turning state) to the vertical state (pushing state). During the rotation of the shovel plate 23, the slider 214 is pulled up by the first connecting rope 231, so that the turning cylinder 22 is located on the upper surface of the soil. At the same time, the second connecting rope 237 is in a slack state, and the anti-blocking plate 234 slides down by its own weight, so that the first discharge hole 233 and the second discharge hole 235 are misaligned to block the first discharge hole 233. The cover plate 131 is opened, and the sliding drive assembly 3 drives the moving frame 21 to move towards the discharge port. The shovel plate 23 pushes the soil on the conveyor belt 16 to perform the discharge operation, which speeds up the discharge efficiency.

[0058] This application also discloses a method for dredging rivers, including the following steps:

[0059] Step S1: Construction Site Preparation; The main tasks for construction site preparation are as follows: a. Review and understand the site, carefully survey the site, and fully consider adverse conditions; b. Determine the construction scope based on the construction drawings and temporary construction needs; c. Make site plans. Set up material storage areas, equipment storage areas, etc.

[0060] Step S2: Surveying and Setting Out; According to the design drawings, the silt excavation should reach the designed clearing baseline. Establish the entire project construction control network based on the design plane control points and elevation control points. Before excavation, based on the construction control network and according to the excavation boundary lines and slope requirements determined in the design drawings, set up excavation line densification stakes and an elevation control system. Set up a temporary stake every 20m on both sides of the river channel as the control basis for the excavation range. During construction, surveying technicians will be on-site to set out and re-measure to ensure the lateral silt removal of the excavated river channel.

[0061] Step S3: Slope trimming. Excavators are used to excavate and trim the slopes on both sides of the river. A silt treatment device for river dredging is installed on the trimmed slopes. All trees, tree roots, wall foundations, ground, garbage and other obstacles in the construction area are cleared. Temporary transport lanes are built to ensure that transport vehicles can pass normally.

[0062] Step S4: Wet dredging of the river channel. Dredging equipment is used to excavate silt from the river channel. Dredging proceeds from upstream to downstream, starting with the center and then moving to the sides, excavating along the direction of water flow and according to the riverbed elevation shown in the design drawings. Since the elevation of the riverbank cannot be clearly detected during dredging, a sounding rod is required. After dredging is completed in a certain area, personnel immediately use an underwater depth sounder or the sounding rod to check the dredging depth to avoid missed areas or insufficient dredging depth. Due to the high water content of the riverbank mudflats, the excavated silt is discharged to a silt treatment device for drying and dewatering.

[0063] Step S5: Mechanical transportation of silt. The dried and dehydrated silt is transported by transfer vehicle.

[0064] Step S6: Clean up the site, with manual assistance to remove the mud left on the sidewalk.

[0065] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sludge treatment device for river dredging, characterized in that: The system includes a silt drying rack (1) placed on a riverbank slope. The silt drying rack (1) is equipped with a support for placing silt, and the support has water-permeable holes (161). Side plates (11) are provided on both sides of the silt drying rack (1). A front plate (12) is provided at one end of the silt drying rack (1) and connected between the two side plates (11). A rear plate (13) is provided at the other end of the silt drying rack (1) and connected between the two side plates (11). The front plate (12), the rear plate (13), and the two side plates (11) enclose a drying area. The silt drying rack (1) is equipped with a turning device to turn the silt on the support. Mechanism (2); The turning mechanism (2) includes a movable frame (21) slidably connected to the side plate (11) and a turning cylinder (22) rotatably connected to the movable frame (21). The silt drying rack (1) is provided with a sliding drive assembly (3) for driving the movable frame (21) to slide. The outer peripheral wall of the turning cylinder (22) is provided with a soil loading groove (221). Multiple soil loading grooves (221) are provided and distributed around the axis of the turning cylinder (22). The movable frame (21) is provided with a turning drive assembly (25) for driving the turning cylinder (22) to rotate. The turning mechanism (2) also includes a shovel plate (23) provided on the movable frame (21). The shovel plate (23) is inclined and located at the front end of the turning cylinder (22). The lower part of the shovel plate (23) abuts against the upper surface of the bearing body, and the upper part of the shovel plate (23) abuts against the outer wall of the upper semicircumference of the turning cylinder (22). The moving frame (21) includes a moving horizontal plate (211) and a moving vertical plate (212) fixedly connected to the lower end faces of both sides of the moving horizontal plate (211). The turning cylinder (22) is rotatably connected between the two moving vertical plates (212). The shovel plate (23) has a first feeding channel (232). The side wall of the shovel plate (23) near the turning cylinder (22) has a channel connecting to the first feeding channel. The first discharge hole (233) of the feed channel (232) is provided with a feeding mechanism (4) for conveying quicklime powder to the first feed channel (232). The feeding mechanism (4) includes a storage box (41) fixedly connected to the moving cross plate (211) for storing quicklime powder, a conveying air pump (42) connected to the storage box (41), and a first feeding hose (43) connected to the first feed channel (232) and the conveying air pump (42). The conveying air pump (42) is used to convey the quicklime powder in the storage box (41) to the first feed channel (232) through the first feeding hose (43).The movable vertical plate (212) is provided with a vertically extending groove (213) and a slider (214) slidably connected to the groove (213). The slider (214) is rotatably connected to a soil-turning shaft (24). The soil-turning cylinder (22) is coaxially fixedly sleeved on the soil-turning shaft (24). The movable vertical plate (212) is provided with an elastic element built into the groove (213) to force the slider (214) to slide downward under normal conditions. A first connecting rope (231) is provided on the side of the shovel plate (23) away from the connecting rod (216). The other end of the first connecting rope (231) is fixedly connected to the slider (214). 4) When the free end of the shovel plate (23) driven by the adjusting component rotates around the connecting rod (216) to a vertical state, the shovel plate (23) pulls the slider (214) upward through the first connecting rope (231); the turning shaft (24) has a second feeding channel (241), and the inner wall of the soil loading trough (221) is provided with a third discharge hole (222) connected to the second feeding channel (241). The feeding mechanism (4) also includes a second feeding hose (44) connected to the turning shaft (24) through a rotary joint, and the second feeding hose (44) is connected to the conveying air pump (42).

2. The sludge treatment device for river dredging according to claim 1, characterized in that: A connecting rod (216) is fixedly connected between the two movable vertical plates (212). The lower end of the shovel plate (23) is rotatably sleeved on the connecting rod (216). The movable horizontal plate (211) / movable vertical plate (212) is provided with an adjusting component to adjust the swing angle of the shovel plate (23). The rear plate (13) is provided with a discharge port.

3. The sludge treatment device for river dredging according to claim 1, characterized in that: The shovel plate (23) is slidably connected to the side wall of the turning cylinder (22) with an anti-blocking plate (234). The anti-blocking plate (234) has a second discharge hole (235) for connecting the first discharge hole (233). A second connecting rope (237) is provided between the moving horizontal plate (211) and the anti-blocking plate (234). One end of the second connecting rope (237) is fixedly connected to the moving horizontal plate (211), and the other end of the second connecting rope (237) is fixedly connected to the anti-blocking plate. When the shovel plate (23) is in a vertical state, the anti-blocking plate (234) slides down by its own weight, causing the first discharge hole (233) and the second discharge hole (235) to be misaligned to block the first discharge hole (233). When the shovel plate (23) is in an inclined state, the anti-blocking plate (234) is pulled by the second connecting rope (237) to slide away from the connecting rod (216), so that the first discharge hole (233) and the second discharge hole (235) are connected.

4. A method for dredging rivers, characterized in that: Includes the following steps: Step S1: Construction site preparation; Step S2: Measurement and layout; Step S3: Slope trimming. The slopes on both sides of the river are excavated and trimmed using an excavator. The silt treatment device for river dredging as described in any one of claims 1-3 is installed on the trimmed slopes. Step S4: Wet dredging of the river channel. The dredging equipment is used to excavate the silt in the river channel. The excavated silt is discharged into the silt treatment device for river dredging and dewatering. Step S5: Mechanical transportation of silt. The dried and dehydrated silt is transferred by a transfer vehicle. Step S6: Clean up the site.

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