A rapid dehydration device for river and reservoir bottom mud landfill

Abstract

The present invention provides a rapid dewatering device for river and reservoir bottom mud landfills, relating to the field of bottom mud dewatering devices. The device excavates a foundation pit to form a cofferdam, into which moist blown fill soil is poured. The device comprises a vacuum pump and multiple water collection barrels. The vacuum pump is positioned on the slope to the right of the cofferdam, and the multiple water collection barrels are buried equidistantly at the bottom of the cofferdam. An air pipe is connected to the working end of the vacuum pump, a sealing plate is provided at the top of the water collection barrel, and a piston slides inside the water collection barrel. The device comprises a vacuum pump positioned at the edge of the cofferdam, and multiple water collection barrels are positioned at the bottom of the cofferdam. A piston slides inside the water collection barrel. The vacuum pump and the water collection barrel are connected via an air pipe. The vacuum pump is used to extract air from the water collection barrels, creating a negative pressure inside the water collection barrels, thereby drawing moisture from the blown fill layer into the water collection barrels and accelerating the natural infiltration rate. This further shortens the time required for the blown fill soil to air.

Description

Technical Field

[0001] The invention relates to the technical field of bottom mud dewatering devices, in particular to a rapid dewatering device for river and reservoir bottom mud landfills. Background Art

[0002] In Zhejiang Province, the sludge filled in rivers, lakes, reservoirs and ponds is mostly disposed of by on-site filling or agricultural return to farmland. Natural drying is the most commonly used dehydration method. The basic process is: dredging the sludge slurry, then pumping it into the sludge dump through a sludge pump, and then naturally drying it to separate the mud and water.

[0003] Natural drying occurs primarily through sunlight evaporation, air drying, and natural infiltration. The drying period can take three to five years or even longer and is significantly affected by climate. Precipitation and other weather factors can significantly prolong the drying cycle, particularly for sediments primarily composed of fine particles (clay and silt). This results in long-term use of the drying yard, resulting in idle land resources and potential safety hazards. Because the water in the lower and middle portions of the yard is extremely difficult to drain, the depth of the dredged sediment natural drying yard generally does not exceed 3 meters.

[0004] In addition, some areas use mechanical filter press dehydration. Although the filter press dehydration efficiency is high, the amount of mud discharged each time is small, and it consumes a lot of energy and has high costs, and its applicability for large-scale use is low.

[0005] The current vacuum pre-pressing dehydration steps are relatively cumbersome, and dehydration is carried out from the top, requiring the water to overcome its own weight before being discharged. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In view of the deficiencies in the prior art, the present invention provides a rapid dehydration device for river and reservoir bottom mud landfill, which solves the problems raised in the above-mentioned background technology.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rapid dehydration device for river reservoir bottom mud site filling, excavating a foundation pit to form a cofferdam, pouring moist blown fill soil into the cofferdam, including a vacuum pump and multiple water collection well barrels, the vacuum pump is placed on the slope on the right side of the cofferdam, and multiple water collection well barrels are buried in the bottom of the cofferdam at equal distances, the working end of the vacuum pump is connected to an air pipe, the top of the water collection well barrel is provided with a sealing plate, and a piston is slidably fitted in the water collection well barrel, the air pipe vertically passes through the sealing plate and the piston, and the sealing plate is provided with multiple rows of holes at equal angles, and a semipermeable membrane is provided in the holes.

[0010] The vacuum pump extracts the air in the water collection well barrel, and negative pressure is generated under the piston. The piston descends and slowly draws the water in the blown fill soil into the water collection well barrel.

[0011] The upper end of the water collection well barrel is provided with a ring, and a plurality of notches are opened at equal angles on the ring, and the plurality of notches correspond one to one with the plurality of rows of holes. A paddle is hinged inside the ring, and a plurality of small shovels are provided at the bottom of the paddle. The small shovels extend into the holes, and the lower ends of the small shovels are bent to contact the surface of the semipermeable membrane.

[0012] A driving part is provided in the collar, and the driving part is used to control the paddle to tilt up, and the paddle tilts up to loosen the blown fill soil pressed on the sealing plate, and the small shovel is used to pick out the soil blocks in the hole.

[0013] Preferably, it also includes two cross bars and two driving slides, the two cross bars are symmetrically arranged on the inner sides of the slopes on the left and right sides of the cofferdam, a steel cable is connected between the two cross bars, the two driving slides are arranged between the two steel cables, the steel cables and the driving slides are slidably matched, and a plurality of plow blades are connected to the bottom of the driving slide, and the plow blades of the two driving slides are staggered.

[0014] A plurality of driving wheels are arranged in the driving slide, and the driving wheels clamp the steel cable, and the driving wheels roll to drive the driving slide to move back and forth on the steel cable.

[0015] Preferably, a cavity corresponding to the plow blade is opened at the bottom of the driving slide, the upper end of the plow blade is hinged in the cavity, a vertical electric push rod is provided on the top of the inner wall of the cavity, the lower end of the electric push rod is hinged to the side of the plow blade, and a GPS positioning module is provided in the driving slide.

[0016] Preferably, the driving part includes an electromagnet module, a magnet, and a steel wire. A sliding cavity is opened in the ring, and the sliding cavity corresponds to the notch one by one. The electromagnet module is arranged at the bottom of the inner wall of the sliding cavity, and the magnet slides with the inner wall of the sliding cavity. The magnet is located above the electromagnet module, one end of the steel wire is connected to the top of the magnet, and the other end of the steel wire passes through the ring and is connected to the top of the pick.

[0017] Preferably, a groove is provided on the outside of the water collection well barrel relative to the ring, and the groove is circumferential. A motor is provided at the bottom of the inner wall of the groove, and the motor drive shaft is vertically connected to a rubber toothed roller. A toothed belt is provided on the inside of the ring relative to the groove, and the toothed belt is engaged with the rubber toothed roller.

[0018] Preferably, the cross bar is provided with an extension section, the extension section is overlapped on the cofferdam slope, the extension section is plugged with a pin, and the pin is fixed in the slope.

[0019] Preferably, a waterproof cloth is also included, a clamping groove is provided on the top of the driving slide, the edge of the waterproof cloth is embedded in the clamping groove, a screw rod is passed through the thread of the clamping groove, and the screw rod passes through the edge of the waterproof cloth.

[0020] Preferably, a spring is provided at the bottom of the inner wall of the piston, the lower end of the spring is connected to the bottom of the inner wall of the water collection well barrel, a hose is placed above the piston, the drainage end of the hose extends to the outside of the water collection well barrel, and is connected to a water pump.

[0021] Preferably, a drainage net is also included, which is arranged at the bottom of the cofferdam. The drainage net is composed of non-woven fabric and corrugated filter tube. The non-woven fabric covers the corrugated filter tube, and the pipeline of the vacuum pump is connected to the corrugated filter tube.

[0022] (3) Beneficial effects

[0023] The present invention provides a rapid dehydration device for river and reservoir bottom mud landfills. It has the following beneficial effects:

[0024] 1. The rapid dewatering device for the river and reservoir bottom mud landfill site uses a vacuum pump installed at the cofferdam side and multiple water collection barrels placed at the bottom of the cofferdam. Pistons slide inside the barrels, and the vacuum pumps are connected to the barrels via air pipes. The vacuum pump draws air from the barrels, creating negative pressure inside the barrels. This draws moisture from the blown fill into the barrels, accelerating natural infiltration and further shortening the time required for the blown fill to air.

[0025] 2. A drainage network is set up at the bottom of the blown fill soil. The overlying mud can serve as a sealing layer when vacuuming, which can effectively improve the vacuum degree. Compared with vacuuming the soil surface, the negative pressure drainage direction of the present invention is consistent with the direction of gravity, which is more conducive to the discharge of water inside the soil. Through the specially designed water collection well, the vacuum loss between the vacuum source and the water collection well is eliminated.

[0026] 3. This rapid dewatering device for the reservoir bottom mud landfill features horizontal bars on both sides of the cofferdam, with steel cables welded between them. Two drive slides, each fitted with a plow blade, slide back and forth, scooping up deep layers of soil and exposing them to the outside world. This agitation, which brings the soil deeper and deeper into contact with the outside world, helps speed up drying.

[0027] 4. This rapid dewatering device for river and reservoir bottom mud landfills features a ferrule that slides onto the top of the water collection well bucket. Multiple paddles are hinged within the ferrule, and several small shovels are located at the bottom of the paddles. When the electromagnet module is energized, it generates a magnetic field that draws the magnet downward. The magnet pulls on a steel wire, which in turn pulls on the paddles. The paddles tilt upward, allowing the small shovels to remove clods from the holes. A motor, rubber gear roller, and toothed belt then slowly rotate the ferrule, loosening the soil layer above the water collection well bucket. This prevents the soil from being dehydrated and compacted, leading to hardening and clumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a reference diagram for the structure of the present invention;

[0029] Figure 2 It is a three-dimensional diagram of the structure of the present invention;

[0030] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0031] Figure 4 This is a schematic diagram of another state of the structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the water collection well barrel structure of the present invention;

[0033] Figure 6 This is a diagram showing the internal structure of the water collection well barrel of the present invention;

[0034] Figure 7 For the present invention Figure 6 A magnified view of the structure at point B in the middle;

[0035] Figure 8 This is a schematic diagram of the structure of the plectrum of the present invention;

[0036] Figure 9 This is a cross-sectional view of the drive slide structure of the present invention;

[0037] Figure 10 This is a reference diagram of the drainage network structure of the present invention.

[0038] In the figure: 1 vacuum pump, 11 air pipe, 2 water collection well bucket, 21 piston, 22 hose, 23 spring, 24 groove, 25 motor, 26 rubber gear roller, 3 cross bar, 31 extension section, 32 pin, 33 steel cable, 4 drive slide, 41 clamping groove, 42 screw, 43 chamber, 44 plow blade, 45 electric push rod, 46 GPS positioning module, 5 waterproof cloth, 6 sealing plate, 61 hole, 62 semipermeable membrane, 7 ring, 71 notch, 72 sliding cavity, 73 electromagnet module, 74 magnet, 75 steel wire, 76 toothed belt, 8 pick, 81 small fine shovel, 9 drainage net. DETAILED DESCRIPTION

[0039] The embodiment of the present invention provides a rapid dewatering device for river and reservoir bottom mud landfill, such as Figure 1-9 As shown, a foundation pit is excavated to form a cofferdam, into which moist blown fill soil is poured. The system includes a vacuum pump 1 and multiple water collection wells 2. The vacuum pump 1 is fixedly mounted on the slope to the right of the cofferdam. Multiple water collection wells 2 are buried at equal intervals in the bottom of the cofferdam. An air pipe 11 is fixedly mounted on the working end of the vacuum pump 1, and a sealing plate 6 is fixedly mounted on the top of the water collection well 2. A piston 21 is slidably fitted inside the water collection well 2. The air pipe 11 vertically passes through the sealing plate 6 and piston 21. The sealing plate 6 has multiple rows of holes 61 formed at equal angles, and a semipermeable membrane 62 is fixedly mounted within the holes 61. The semipermeable membrane 62 only allows water molecules to pass through.

[0040] Working Principle: Blown fill covers the water collection well 2. Vacuum pump 1 extracts the air from the water collection well 2, creating negative pressure below piston 21. This negative pressure causes piston 21 to slowly descend. During this descent, negative pressure is created above piston 21, slowly drawing moisture from the blown fill into the water collection well 2.

[0041] Under the action of natural infiltration, the water in the blower fill gradually flows downward. The cooperation between the water collection well barrel 2 and the vacuum pump 1 accelerates the infiltration speed, further speeding up the drying of the blower fill.

[0042] A ring 7 is slidably fitted on the upper end of the water collection well barrel 2. The ring 7 is provided with a plurality of notches 71 at equal angles. The plurality of notches 71 correspond one-to-one to the plurality of rows of holes 61. A paddle 8 is hinged inside the ring 7. A plurality of small shovels 81 are welded to the bottom of the paddle 8. The small shovels 81 extend into the holes 61. The lower ends of the small shovels 81 are bent and contact the surface of the semipermeable membrane 62.

[0043] A driving unit is provided in the collar 7 for controlling the lift of the paddle 8, which loosens the blown fill soil pressed on the sealing plate 6, and the small shovel 81 is used to dig out the soil in the hole 61. The paddle 8 can be lifted up by 10 degrees.

[0044] Because the bottommost blown fill soil directly contacts the sealing plate 6 at the top of the water collection well barrel 2, the soil in this contact area has hardened due to water extraction and pressure from the upper soil layer. This hardened soil clump is difficult for water molecules from above to penetrate. Therefore, the driving unit causes the paddle 8 to tilt, and the small shovel 81 to remove the soil clumps from the hole 61, thereby loosening the blown fill soil in the hole 61 of the sealing plate 6.

[0045] It also includes two cross bars 3 and two driving slides 4. The two cross bars 3 are symmetrically arranged on the inner sides of the slopes on the left and right sides of the cofferdam. A steel cable 33 is welded between the two cross bars 3, and the steel cable 33 is in a taut state.

[0046] The two driving slides 4 are arranged between the two steel cables 33 . The steel cables 33 are in sliding cooperation with the driving slides 4 . A plurality of plow blades 44 are arranged at the bottom of the driving slides 4 . The plow blades 44 of the two driving slides 4 are staggered.

[0047] The driving slide 4 drives the plow blade 44 to move back and forth, achieving a stirring effect. During the movement of the plow blade 44, the soil deep inside is scooped up and exposed to the outside world, thereby accelerating the natural drying speed.

[0048] A plurality of drive wheels driven by a motor are fixedly installed in the drive slide 4. The drive wheels clamp the steel cable 33 and drive the drive slide 4 to move back and forth on the steel cable 33 through the rolling of the drive wheels. Since this is a conventional technology, the specific structure, connection method, etc. will not be described in detail and are not drawn in the drawings.

[0049] After the left side driving movable seat 4 moves repeatedly once, the right side driving movable seat 4 moves repeatedly once again. This alternation is repeated continuously. The bottom of the driving slide 4 contacts the surface of the blower fill soil, thereby smoothing the scooped soil.

[0050] A chamber 43 corresponding to the plow blade 44 is provided at the bottom of the driving slide 4. The upper end of the plow blade 44 is hinged in the chamber 43. A vertical electric push rod 45 is welded to the top of the inner wall of the chamber 43. The lower end of the electric push rod 45 is hinged to the side of the plow blade 44. A GPS positioning module 46 is fixedly installed in the driving slide 4.

[0051] Working Principle: The GPS positioning module 46 determines the distance between the two drive slides 4. When the feedback indicates that the distance is sufficient, the electric push rod 45 inside the moving drive slide 4 retracts, causing the plow blade 44 to rotate. This prevents the plow blade 44 from contacting the cofferdam slope, providing protection and preventing damage to the plow blade 44 and the cofferdam slope.

[0052] As attached Figure 6 As shown, the driving part includes an electromagnet module 73, a magnet 74, and a steel wire 75. A sliding cavity 72 is opened in the ring 7, and the sliding cavity 72 corresponds to the notch 71 one by one. The electromagnet module 73 is fixedly installed at the bottom of the inner wall of the sliding cavity 72, and the magnet 74 slides with the inner wall of the sliding cavity 72. The magnet 74 is located above the electromagnet module 73, and one end of the steel wire 75 is welded to the top of the magnet 74, and the other end of the steel wire 75 passes through the ring 7 and is welded to the top of the pick 8.

[0053] During operation, the electromagnet module 73 is energized to generate a magnetic field, which attracts the magnet 74 to descend, and the magnet 74 descends and pulls the steel wire 75. The steel wire 75 pulls the paddle 8 upward.

[0054] A groove 24 is provided on the outside of the water collection well barrel 2 relative to the ring 7. The groove 24 is arranged in a circle. A motor 25 is fixedly installed on the bottom of the inner wall of the groove 24. A rubber toothed roller 26 is fixedly installed vertically upward on the drive shaft of the motor 25. A toothed belt 76 is fixedly embedded on the inner side of the ring 7 relative to the groove 24. The toothed belt 76 is engaged with the rubber toothed roller 26.

[0055] As the paddle 8 drives the small shovel 81 to tilt, loosened soil re-enters the hole 61, preventing the paddle 8 from resetting. This prevents the subsequent soil layer from clumping again. The motor 25 drives the rubber toothed roller 26 to rotate, which in turn drives the entire ring 7 to rotate slowly via the toothed belt 76. This drives the paddle 8 to rotate slowly through the ring 7, keeping the soil layer above the sealing plate 6 loose.

[0056] The crossbar 3 is welded with an extension section 31, which is overlapped on the cofferdam slope. The extension section 31 is fixedly plugged with a pin 32, which is fixed in the slope.

[0057] The system also includes a tarpaulin 5. A clamping groove 41 is welded to the top of the drive slide 4. The edge of the tarpaulin 5 fits into the clamping groove 41. A screw 42 is threaded through the clamping groove 41, and the screw 42 extends through the edge of the tarpaulin 5. The tarpaulin 5 is unfolded by moving the two drive slides 4 away from each other. On rainy days, the tarpaulin 5 is fixed in the clamping groove and the two drive slides 4 are moved away from each other. The tarpaulin 5 is then unfolded to cover the blower fill soil.

[0058] As for the edge of the cofferdam slope, although the waterproof cloth 5 cannot be covered, the edge area can be covered by manually laying the waterproof cloth 5. In this way, the purpose of shielding the blown fill from rainwater on rainy days is achieved.

[0059] A spring 23 is welded to the bottom of the inner wall of the piston 21, and the lower end of the spring 23 is welded to the bottom of the inner wall of the water collection well 2. A hose 22 is placed above the piston 21. The drainage end of the hose 22 extends outside the water collection well 2 and is connected to a water pump. The water in the water collection well 2 is pumped out by the water pump.

[0060] The water collection well barrel 2, ferrule 7, and drive slide 4 are all fixedly mounted with a single-chip microcomputer and a battery. The single-chip microcomputer controls the operation of the electronic components, and the battery powers the electronic components through electrons. Since this is a conventional technical method and this solution does not represent an innovation, it will not be described in detail.

[0061] The system also includes a drainage net 9, which is arranged at the bottom of the cofferdam. The drainage net 9 is composed of a non-woven fabric and a corrugated filter tube. The non-woven fabric covers the corrugated filter tube. The pipeline of the vacuum pump 1 is connected to the corrugated filter tube. When the vacuum pump is turned on, negative pressure is generated in the drainage net at the bottom of the blown fill soil, and water seeps into the water collection well due to the negative pressure.

[0062] Combined with attachment Figure 1 As can be seen, the area where the water collection well is buried has a slope, which facilitates the flow of water toward the water collection well. The presence of non-woven fabric reduces the risk of silt covering the water collection well and the corrugated filter tube. However, due to the presence of small particles in the silt, some fine particles of soil still cover the water collection well. Paddle 8 is used to loosen this soil.

[0063] In summary, the rapid dewatering device for river and reservoir bottom mud landfills comprises a vacuum pump 1 installed at the edge of a cofferdam, and multiple water collection barrels 2 placed at the bottom of the cofferdam. Pistons 21 are slidably fitted within the water collection barrels 2. The vacuum pump 1 and the water collection barrels 2 are connected via air pipes 11. The vacuum pump 1 extracts air from the water collection barrels 2, creating a negative pressure within the water collection barrels 2. This draws moisture from the blown fill layer into the water collection barrels 2, accelerating the natural infiltration rate and further shortening the time required for airing the blown fill.

[0064] A drainage network is set up at the bottom of the blown fill soil. The overlying mud can serve as a sealing layer when vacuuming, which can effectively improve the vacuum degree. Compared with vacuuming the soil surface, the negative pressure drainage direction of the present invention is consistent with the direction of gravity, which is more conducive to the discharge of water inside the soil. Through the specially designed water collection well, the vacuum loss between the vacuum source and the water collection well is eliminated.

[0065] Crossbars 3 are installed on both sides of the cofferdam, with steel cables 33 welded between them. Two drive slides 4 are slidably engaged by these cables, each equipped with a plow blade 44. These slides drive the plow blades 44 back and forth, scooping up deep soil layers and bringing them into contact with the outside world. This stirs the soil, bringing the soil layers deeper and deeper into contact with the outside world, helping to speed up drying.

[0066] The top of the water collection well barrel 2 is slidably fitted with a collar 7, hingedly connected to multiple paddles 8. Several small shovels 81 are located at the bottom of the paddles 8. When electromagnet module 73 is energized, it generates a magnetic field that draws magnet 74 downward. Magnet 74 pulls on wire 75, which in turn pulls on paddle 8. This lifts paddle 8, allowing the small shovels 81 to remove clumps of soil from hole 61. The motor 25, rubber gear roller 26, and toothed belt 76 then slowly rotate the collar 7, loosening the soil above the water collection well barrel 2. This prevents the soil from being drained of moisture and compacted, leading to hardening and clumping.

[0067] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rapid dewatering device for river and reservoir bottom mud landfill, which excavates a foundation pit to form a cofferdam, and pours moist blower fill into the cofferdam, characterized by: The invention comprises a vacuum pump (1) and a plurality of water collecting well barrels (2). The vacuum pump (1) is placed on the slope on the right side of the cofferdam. The plurality of water collecting well barrels (2) are buried at equal distances in the bottom of the cofferdam. The working end of the vacuum pump (1) is connected to an air pipe (11). The top of the water collecting well barrel (2) is provided with a sealing plate (6). A piston (21) is slidably fitted in the water collecting well barrel (2). The air pipe (11) vertically passes through the sealing plate (6) and the piston (21). The sealing plate (6) is provided with multiple rows of holes (61) at equal angles. A semipermeable membrane (62) is provided in the hole (61). The vacuum pump (1) extracts the air from the water collection well barrel (2), generating negative pressure below the piston (21), and the piston (21) descends to slowly draw moisture from the blown fill into the water collection well barrel (2); The upper end of the water collection well barrel (2) is covered with a collar (7), and the collar (7) is provided with a plurality of notches (71) at equal angles, and the plurality of notches (71) correspond one to one with the plurality of rows of holes (61). A paddle (8) is hinged in the collar (7), and a plurality of small shovels (81) are provided at the bottom of the paddle (8), and the small shovels (81) extend into the holes (61), and the lower ends of the small shovels (81) are bent to contact the surface of the semipermeable membrane (62); A driving unit is provided in the collar (7), and the driving unit is used to control the paddle (8) to tilt up, and the paddle (8) tilts up to loosen the blown fill soil pressed on the sealing plate (6), and the small shovel (81) is used to dig out the soil blocks in the hole (61).

2. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 1, characterized in that: The invention also comprises two cross bars (3) and two driving slides (4), wherein the two cross bars (3) are symmetrically arranged on the inner sides of the slopes on the left and right sides of the cofferdam, a steel cable (33) is connected between the two cross bars (3), and the two driving slides (4) are arranged between the two steel cables (33), and the steel cables (33) and the driving slides (4) are slidably matched, and a plurality of plow blades (44) are connected to the bottom of the driving slide (4), and the plow blades (44) of the two driving slides (4) are staggered. A plurality of driving wheels are provided in the driving slide (4), the driving wheels clamp the steel cable (33), and the driving wheels roll to drive the driving slide (4) to move back and forth on the steel cable (33).

3. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 2, characterized in that: The bottom of the driving slide (4) is provided with a chamber (43) corresponding to the plow blade (44), the upper end of the plow blade (44) is hinged in the chamber (43), the top of the inner wall of the chamber (43) is provided with a vertical electric push rod (45), the lower end of the electric push rod (45) is hinged to the side of the plow blade (44), and a GPS positioning module (46) is provided in the driving slide (4).

4. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 3, characterized in that: The driving part comprises an electromagnet module (73), a magnet (74), and a steel wire (75). A sliding cavity (72) is provided in the ferrule (7), and the sliding cavity (72) corresponds to the notch (71) one by one. The electromagnet module (73) is arranged at the bottom of the inner wall of the sliding cavity (72), and the magnet (74) is slidably matched with the inner wall of the sliding cavity (72). The magnet (74) is located above the electromagnet module (73). One end of the steel wire (75) is connected to the top of the magnet (74), and the other end of the steel wire (75) passes through the ferrule (7) and is connected to the top of the pick (8).

5. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 4, characterized in that: The outer side of the water collecting well barrel (2) is provided with a groove (24) relative to the ferrule (7), and the groove (24) is arranged in a circle. A motor (25) is provided at the bottom of the inner wall of the groove (24), and a transmission shaft of the motor (25) is vertically connected to a rubber toothed roller (26). A toothed belt (76) is provided on the inner side of the ferrule (7) relative to the groove (24), and the toothed belt (76) is engaged with the rubber toothed roller (26).

6. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 5, characterized in that: The crossbar (3) is provided with an extension section (31), the extension section (31) is overlapped on the cofferdam slope, the extension section (31) is plugged with a pin (32), and the pin (32) is fixed in the slope.

7. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 6, characterized in that: The invention also includes a waterproof cloth (5), a clamping groove (41) is provided on the top of the driving slide (4), the edge of the waterproof cloth (5) is embedded in the clamping groove (41), a screw (42) is threaded through the clamping groove (41), and the screw (42) passes through the edge of the waterproof cloth (5).

8. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 7, characterized in that: A spring (23) is provided at the bottom of the inner wall of the piston (21), and the lower end of the spring (23) is connected to the bottom of the inner wall of the water collection well barrel (2). A hose (22) is placed above the piston (21), and the drainage end of the hose (22) extends to the outside of the water collection well barrel (2) and is connected to a water pump.

9. The rapid dehydration device for river and reservoir bottom mud landfill according to claim 8, characterized in that: The invention also includes a drainage net (9) which is arranged at the bottom of the cofferdam. The drainage net (9) is composed of non-woven fabric and a corrugated filter tube. The non-woven fabric covers the corrugated filter tube. The pipeline of the vacuum pump (1) is connected to the corrugated filter tube.

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