Water conservancy construction dredging equipment

Abstract

The present application relates to the technical fields of dredging, and discloses a water conservancy construction dredging equipment, which comprises a first half-spherical shell and a second half-spherical shell for containing silt, the first half-spherical shell and the second half-spherical shell are butted to form a complete spherical shell and seal the silt inside, the inside of the first half-spherical shell and the second half-spherical shell is provided with a half-spherical shell-shaped filter cloth, a winding drum is arranged at the center of the filter cloth, a driving assembly for linearly moving and rotating the winding drum is arranged at the middle of the first half-spherical shell and the second half-spherical shell, the center of the filter cloth is linearly moved to the center of the complete spherical shell and rotates to extrude the silt and dehydrate the silt, a plurality of water leakage holes are arranged at the lower part of the first half-spherical shell and the second half-spherical shell, the two half-spherical shells are used to directly contain the silt, the rotation and movement of the center of the two half-spherical shell-shaped filter cloths are used to extrude the silt from both sides, the silt is dehydrated, the dehydration effect is good, and the mud blocks after dehydration can be easily discharged through the separation of the two half-spherical shells.

Description

Technical Field

[0001] This invention relates to the field of dredging technology, specifically to a dredging device for water conservancy construction. Background Technology

[0002] River silt generated during water conservancy construction needs to be dewatered into silt cakes or lumps. There are several reasons for dewatering and pressing silt into solid sludge: First, it facilitates transportation and disposal: Silt typically has a high water content and is highly fluid, making it prone to leakage during transportation. This not only contaminates transport vehicles but may also pollute the environment along the route. Pressing it into sludge significantly reduces its water content and volume, making it easier to handle and transport, effectively reducing transportation costs and environmental impact. Second, it reduces the risk of environmental pollution: Untreated silt may contain large amounts of harmful substances such as heavy metals, organic matter, and pathogens. If haphazardly dumped or discharged, these harmful substances can easily enter the soil and water bodies through rainwater runoff and infiltration, causing environmental pollution and ecological damage. Beneficial for subsequent processing and resource utilization: Sludge in sludge-like form is more suitable for further processing and resource utilization; for example, high-temperature incineration of sludge can reduce its volume and render it harmless, while the heat generated can be used for power generation; some processed sludge can also be used as raw materials for building materials, such as brick making and pottery making, realizing resource recycling. Meets relevant environmental standards and requirements: Compacting sludge into sludge-like form is a common pretreatment method that helps ensure that various indicators of the sludge meet environmental standards.

[0003] Common sludge dewatering equipment includes: screw press sludge dewatering equipment, filter press dewatering equipment, vacuum belt dewatering equipment, and centrifugal dewatering equipment. For example, patent CN115650537B discloses an integrated sludge dredging and solidification device, and patent CN118637804B discloses a high-efficiency dewatering and volume reduction system for dredged bottom sludge based on resource utilization. Because the aforementioned existing technologies require sludge to be placed from above, after dewatering, sludge cakes or lumps are inconvenient to remove from the equipment, or require auxiliary structures for discharge. Furthermore, the main method used is centrifugation to achieve sludge dewatering, which, compared to traditional filter cloth dewatering, results in a higher impurity rate in the separated water and a limited dewatering rate. Summary of the Invention

[0004] The purpose of this invention is to solve at least one of the problems in the prior art and to provide a dredging device for water conservancy construction.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A dredging device for water conservancy construction includes a first hemispherical shell and a second hemispherical shell for containing silt. The first and second hemispherical shells are joined together to form a complete spherical shell, sealing the silt inside. Both the first and second hemispherical shells have hemispherical filter cloths on their inner sides, with a roller threaded through the center of the filter cloth. Both the first and second hemispherical shells have a drive assembly in their middle sections that causes the roller to move linearly and rotate. The center of the filter cloth moves linearly towards the center of the complete spherical shell and rotates, squeezing the silt to dehydrate it. Both the first and second hemispherical shells have several drainage holes at their lower parts.

[0007] Furthermore, the filter cloth is evenly distributed with several reinforcing strips extending from the center to the edge.

[0008] Furthermore, the filter cloth has an outer ring at its edge and an inner ring at its center; the outer ring is bolted to the inner edge of the first or second hemispherical shell, and the inner ring is bolted to the roll.

[0009] Furthermore, the roll includes a first disc, a second disc, and a spacer connecting the middle of the first and second discs. The second disc is close to the center of the complete spherical shell and its edge is bent toward the center of the complete spherical shell. The central part of the filter cloth surrounds the spacer and is connected to the middle of the side of the second disc facing the first disc.

[0010] Furthermore, the first end of the spacer post is fixedly connected to the first disc body; the second end of the spacer post is connected to a prism, and a stud is connected to the outside of the prism. The center of the second disc body is provided with a polygonal hole that mates with the prism, and the outside of the stud is connected to a nut that fixes the second disc body by a thread.

[0011] Furthermore, the drive assembly includes a helical rod, and both the first and second hemispherical shells have helical holes at their centers for the helical rod to pass through; the inner end of the helical rod is connected to a drum.

[0012] Furthermore, the outer sides of the first and second hemispherical shells are provided with a bracket, a first hydraulic cylinder, and a movable plate. The first hydraulic cylinder drives the movable plate to move. A cylindrical push rod is rotatably connected to the middle of the movable plate. The push rod is connected to a helical rod. The bracket is provided with a circular hole for the push rod to pass through.

[0013] Furthermore, the edges of the first and second hemispherical shells are provided with matching annular conical surfaces; the annular conical surface of the first hemispherical shell is provided with an outer annular groove, and a sealing ring is provided inside the outer annular groove.

[0014] Furthermore, an inner annular groove is provided on the inner side of the edge of the first hemispherical shell, and a number of stepped holes are provided between the inner annular groove and the outer annular groove. An annular first flexible band is provided at the opening of the inner annular groove, and an annular second flexible band is provided at the bottom of the outer annular groove. Oil is filled between the first flexible band and the second flexible band.

[0015] Furthermore, the first and second hemispherical shells are provided with hinge ears and hangers hinged to the hinge ears on their upper sides, and the hangers are provided with a second hydraulic cylinder for driving the first and second hemispherical shells to flip open and close.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention employs two hemispherical shells to directly contain sludge, while utilizing the rotational movement of the center of the two hemispherical shell-shaped filter cloths to squeeze the internal sludge from both sides, achieving sludge dewatering with good dewatering effect; the separation of the two hemispherical shells facilitates the discharge of sludge lumps after dewatering.

[0018] This invention uses the rotation of the filter cloth center to move towards the sludge, squeezing and reducing the space in the sludge, forcing the water in the sludge to separate from the sludge and pass through the filter cloth, thus achieving dehydration. The water separated by the filter cloth has fewer impurities, ensuring a high dehydration rate.

[0019] The filter cloth of the present invention has circumferentially distributed reinforcing strips, which provide support and reinforcement for the filter cloth; the filter cloth can be detachably installed in the hemispherical shell for easy replacement.

[0020] The present invention adopts a matching structure of a screw rod and a screw hole. The first hydraulic cylinder drives the screw rod to move, so that the center of the filter cloth is squeezed into the silt while rotating simultaneously.

[0021] The two hemispherical shells of the present invention have a sealing structure. The sealing ring is protruded by the pressure of the sludge using a flexible belt and oil to achieve a seal, thus preventing leakage between the two hemispherical shells when pressurized. When there is no internal pressure, the sealing ring retracts into the outer annular groove, reducing wear on the sealing ring.

[0022] The two hemispherical shells of this invention adopt a grab bucket-type flip-open structure, which works in conjunction with an excavator to dewater the silt while it is being dredged, reducing the transfer of silt and enabling silt dewatering to be carried out simultaneously with the grabbing operation. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a side view of the present invention.

[0025] Figure 3 This is a three-dimensional schematic diagram of the hemispherical shell in the docking state from the side view of the present invention.

[0026] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the hemispherical shell in the docking state of the present invention.

[0027] Figure 5 This is a schematic diagram of the inner structure of the filter cloth of the present invention.

[0028] Figure 6 This is a schematic diagram of the internal structure of the second hemispherical shell of the present invention.

[0029] Figure 7 This is a schematic diagram of the external structure of the second hemispherical shell of the present invention.

[0030] Figure 8 This is a schematic diagram of the outer structure of the filter cloth of the present invention.

[0031] Figure 9 This is a schematic diagram of the filter cloth driving structure of the present invention.

[0032] Figure 10 This is a schematic diagram of the sealing structure of the present invention.

[0033] Figure 11 This is a schematic diagram of the three-dimensional structure of the first hemispherical shell of the present invention.

[0034] Figure 12 This is a schematic diagram of the present invention in conjunction with an excavator.

[0035] In the diagram: 1. First hemispherical shell; 2. Second hemispherical shell; 3. Filter cloth; 4. Reinforcing strip; 5. Roller; 6. Bracket; 7. First hydraulic cylinder; 8. Movable plate; 9. Top rod; 10. Helical rod; 11. Helical hole; 12. Limiting plate; 13. Leakage hole; 14. Annular conical surface; 15. Outer annular groove; 16. Sealing ring; 17. Inner annular groove; 18. Stepped hole; 19. First flexible belt; 20. Second flexible belt; 21. Spring; 22. Top block; 23. Grip tooth; 24. Hinge ear; 25. Top plate; 26. Lifting lug; 27. Swing rod; 28. Lifting plate; 29. ​​Second hydraulic cylinder; 30. Excavator; 31. Outer ring body; 32. Inner ring body; 33. Annular seat;

[0036] 51. First disc; 52. Second disc; 53. Spacer post; 54. Stud; 55. Prism; 56. Polygonal hole; 57. Nut. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Specific embodiments of the dredging equipment for water conservancy construction provided by the present invention:

[0039] Please refer to the attached document. Figure 1-12 The water conservancy construction dredging equipment includes a first hemispherical shell 1 and a second hemispherical shell 2 to contain silt. The first hemispherical shell 1 and the second hemispherical shell 2 are joined together to form a complete spherical shell, sealing the silt inside.

[0040] In this embodiment, the first hemispherical shell 1 and the second hemispherical shell 2 form a grab bucket. By flipping and opening the first hemispherical shell 1 and the second hemispherical shell 2, the grab bucket can be lifted and moved by external equipment to directly grab the silt in the river channel.

[0041] When the first hemispherical shell 1 and the second hemispherical shell 2 are joined and closed, their circular openings are located in a vertical plane and face the horizontal side.

[0042] In the docked closed state, the upper side of the first hemispherical shell 1 and the second hemispherical shell 2 is provided with a hinge lug 24 and a hanger hinged to the hinge lug 24. There are two hinge lugs 24, which are respectively connected to the upper side of the first hemispherical shell 1 and the second hemispherical shell 2.

[0043] Each hinge lug 24 has two hinge holes, which are not lower than the upper ends of the first hemispherical shell 1 and the second hemispherical shell 2. The hanger includes a top plate 25, and a lifting lug 26 is provided on the upper side of the middle part of the top plate 25. The lifting lug 26 can be connected to external equipment. In this embodiment, the hanger is connected to the excavator 30 through the lifting lug 26, and the excavator 30 drives it to grab the silt in the river. The hydraulic cylinder described later is connected to the hydraulic station of the excavator 30 through a soft oil pipe to realize the action of the hydraulic cylinder described later.

[0044] Two swing arms 27 are hinged to the lower sides of both ends of the top plate 25, and the lower ends of the two swing arms 27 are respectively hinged to two hinge lugs 24. A lifting plate 28 is provided below the top plate 25, and the two ends of the lifting plate 28 are respectively hinged to two hinge lugs 24.

[0045] The hanger is equipped with a second hydraulic cylinder 29 that drives the first hemispherical shell 1 and the second hemispherical shell 2 to flip and open. Specifically, the second hydraulic cylinder 29 is connected between the top plate 25 and the lifting plate 28. When the second hydraulic cylinder 29 extends, the lifting plate 28 descends relative to the top plate 25, thereby causing the upper end of the hinge ear 24 to flip downward, causing the two swing rods 27 to swing outward, thereby causing the first hemispherical shell 1 and the second hemispherical shell 2 to flip and separate.

[0046] When the second hydraulic cylinder 29 shortens, the lifting plate 28 rises, causing the upper end of the hinge ear 24 to flip upwards. The first hemispherical shell 1 and the second hemispherical shell 2 then flip, their lower ends approaching each other to grab the silt. Finally, the openings of the first hemispherical shell 1 and the second hemispherical shell 2 align and connect. Figure 1 , Figure 2 and Figure 4 The state is such that the parts are joined together to form a complete spherical shell, with a sealed cavity inside to hold the silt.

[0047] In order for the first hemisphere 1 and the second hemisphere 2 to penetrate deep into the silt during the sludge-grabbing process, thereby filling the interior of the complete spherical shell, the lower outer sides of the first hemisphere 1 and the second hemisphere 2 are provided with a number of gripping teeth 23, and the gripping teeth 23 of the first hemisphere 1 and the second hemisphere 2 are staggered and correspond to each other.

[0048] The gripper 23 not only makes it easy for the first hemisphere 1 and the second hemisphere 2 to connect, but also makes it easy to insert into the silt during the gripping process, making the gripping action of the silt smoother, improving work efficiency, and thus allowing the interior of the complete spherical shell to be filled with silt, which is convenient for subsequent pressure dewatering of the silt.

[0049] Both the first hemispherical shell 1 and the second hemispherical shell 2 have hemispherical filter cloth 3 inside. A roll 5 is threaded through the center of the filter cloth 3. When the roll 5 rotates, the filter cloth 3 can be twisted and wound around the outside of the roll 5. The edge of the filter cloth 3 is sealed to the inside of the opening edge of the first hemispherical shell 1 or the second hemispherical shell 2, and the roll 5 is sealed to the center of the filter cloth 3. There is a gap between other parts of the filter cloth 3, namely the annular area between the center and the edge, and the interior of the hemispherical shell.

[0050] Both the first hemispherical shell 1 and the second hemispherical shell 2 are equipped with a drive assembly that enables the roller 5 to move linearly and rotate. The central part of the filter cloth 3 moves linearly toward the center of the complete spherical shell and rotates, squeezing the sludge to dehydrate it. During this process, the rotation of the roller 5 drives the center of the filter cloth 3 to rotate. Since the outer edge of the filter cloth 3 is connected to the inner edge of the hemispherical shell and cannot rotate, the rotation of the center of the filter cloth 3 generates a torsion, which in turn creates a squeezing effect on the sludge. At the same time, the roller 5 moves from the center position toward the sludge and directly applies pressure to the sludge, promoting the water in the sludge to pass through the filter holes of the filter cloth 3 and enter the inner side of the hemispherical shell.

[0051] In order to allow water to drain quickly, the lower part of the first hemispherical shell 1 and the second hemispherical shell 2 are provided with several drainage holes 13. The water filtered through the filter cloth 3 can be quickly drained through the drainage holes 13 to avoid water accumulation.

[0052] The drive assembly includes a screw rod 10. Both the first hemispherical shell 1 and the second hemispherical shell 2 have a helical hole 11 at their centers for the screw rod 10 to pass through. The inner end of the screw rod 10 is connected to the drum 5. The screw rod 10 is pushed from the outside into the hemispherical shell. As it passes through the helical hole 11, the screw rod 10 rotates due to the action of the helical hole 11. Therefore, as the drum 5 moves and presses the sludge, it rotates to collect the filter cloth 3, causing the filter cloth 3 to wrap around the outside of the drum 5. The tightening of the filter cloth 3 applies pressure to the sludge, and the drum 5 directly applies pressure to the sludge, reducing the space between the two filter cloths 3. This forces the sludge to move towards the center of the complete spherical shell, continuously reducing its volume, thereby allowing water in the sludge to pass through the filter cloth 3 and separate from the sludge, achieving dewatering.

[0053] As the screw rod 10 is pulled outward, it drives the drum 5 to rotate in the opposite direction, releasing the wound filter cloth 3 and resetting the filter cloth 3. The center of the filter cloth 3 moves towards the inner side of the middle of the hemispherical shell until it adheres to the inner side of the hemispherical shell.

[0054] To enable the push-pull movement of the screw rod 10, a U-shaped bracket 6, a first hydraulic cylinder 7, and a movable plate 8 are provided on the outer sides of the first hemispherical shell 1 and the second hemispherical shell 2. The U-shaped bracket 6 is horizontally arranged, with its U-shaped opening facing the hemispherical shell and its open end connected to the hemispherical shell.

[0055] Two first hydraulic cylinders 7 are provided on the outer sides of both the first hemispherical shell 1 and the second hemispherical shell 2. The telescopic ends of the first hydraulic cylinders 7 pass through the middle of the bracket 6. The movable plate 8 is located outside the middle of the bracket 6 and is parallel to the middle of the bracket 6. The telescopic ends of the first hydraulic cylinders 7 are connected to the movable plate 8 and drive the movable plate 8 to move.

[0056] A cylindrical push rod 9 is rotatably connected to the middle of the movable plate 8. Specifically, the middle of the movable plate 8 has a circular hole, and the outer end of the push rod 9 passes through the circular hole. Two circular limiting discs 12 are provided on the outer side of the outer end of the push rod 9. There is a gap between the two limiting discs 12. The two limiting discs 12 are located on both sides of the middle of the movable plate 8. In this way, when the first hydraulic cylinder 7 moves the movable plate 8, the push rod 9 can move linearly or rotate passively.

[0057] The inner end of the push rod 9 is connected to the outer end of the screw rod 10. A circular hole is provided in the middle of the bracket 6, through which the push rod 9 passes. The push rod 9 can rotate within the circular hole in the middle of the bracket 6. Because the push rod 9 is connected to the screw rod 10, the first hydraulic cylinder 7 moves the push rod 9 back and forth via the movable plate 8. The push rod 9 drives the screw rod 10 to move back and forth and pass through the screw hole 11. During the process of passing through the screw hole 11, the screw rod 10 rotates, causing the push rod 9 to rotate. The push rod 9 can rotate at both the bracket 6 and the movable plate 8, ensuring smooth pushing and pulling of the screw rod 10.

[0058] Several reinforcing strips 4 are evenly distributed around the circumference of the filter cloth 3, extending from the center to the edge. The reinforcing strips 4 are made of rope that can be wound but has very little stretch, such as thin steel wire rope. The reinforcing strips 4 improve the strength of the filter cloth 3 and form a skeleton to provide a certain degree of support for the filter cloth 3.

[0059] The roll 5 includes a first disc 51, a second disc 52, and a spacer 53 connecting the middle portions of the first disc 51 and the second disc 52. The center portion of the filter cloth 3 surrounds the spacer 53 and is connected to the middle portion of the side of the second disc 52 facing the first disc 51. A space is formed on the outside of the spacer 53 between the first disc 51 and the second disc 52 for winding the filter cloth 3 and accommodating the wound filter cloth 3.

[0060] Both the first disc 51 and the second disc 52 are circular disc-shaped structures, and the spacer 53 is a cylindrical structure. The second disc 52 is close to the center of the complete spherical shell, and the edge of the second disc 52 is bent towards the center of the complete spherical shell. The bending of the second disc 52 can better adapt to the winding and twisting deformation of the filter cloth 3, making the fit between the filter cloth 3 and the sludge more smooth and conducive to the full dewatering of the sludge.

[0061] The first end of the spacer post 53 is fixedly connected to the first disc 51. One side of the first disc 51 is connected to the spacer post 53, and the other side is connected to the screw rod 10. The second end of the spacer post 53 is detachably connected to the second disc 52. Specifically, the second end of the spacer post 53 is connected to a prism 55, which is a hexagonal prism structure. A stud 54 is connected to the outside of the prism 55. The center of the second disc 52 is provided with a polygonal hole 56 that mates with the prism 55. The polygonal hole 56 is a hexagonal through hole. The prism 55 mates with the polygonal hole 56, which can drive the second disc 52 to rotate, preventing the second disc 52 from slipping and failing to rotate under pressure.

[0062] The second disc 52 is fixed to the outside of the stud 54 by a nut 57 connected by threads. By tightening the second nut 57, the second disc 52 can be fixed to the second end of the spacer 53.

[0063] The filter cloth 3 has an outer ring 31 at its edge and an inner ring 32 at its center. The outer ring 31 is bolted to the inner edge of the first hemispherical shell 1 or the second hemispherical shell 2, and the inner ring 32 is bolted to the roll 5. The detachable connection structure of the filter cloth 3 allows it to be replaced.

[0064] Both the first hemispherical shell 1 and the second hemispherical shell 2 have annular seats 33 on the inner side of their opening edges. Several bolts are evenly inserted around the circumference of the outer ring body 31. The annular seat 33 has threaded holes that mate with the bolts, so that the outer ring body 31 and the annular seat 33 can be connected or separated.

[0065] The second disc 52 has several threaded holes evenly distributed around its central circumference. The inner ring 32 is located on the side of the second disc 52 facing the first disc 51. Several bolts are evenly inserted around the circumference of the inner ring 32. The bolts of the inner ring 32 are connected to the threaded holes of the second disc 52, so that the inner ring 32 and the second disc 52 can be connected or separated.

[0066] After the sludge is dewatered, it is compressed into a flattened spherical block. The second hydraulic cylinder 29 flips and opens the first hemispherical shell 1 and the second hemispherical shell 2, allowing the sludge block to be discharged directly. The discharge operation is very convenient. If the sludge block adheres to the inside of the first hemispherical shell 1 or the second hemispherical shell 2, the push rod 9 and the screw rod 10 move linearly and rotate during the discharge process, pushing the sludge block outward and downward, thus avoiding the phenomenon of the sludge block adhering and not falling off. Therefore, this device can easily overcome the problem of inconvenient sludge discharge.

[0067] The device scoops up silt from the riverbed. During the process of excavator 30 lifting the first hemispherical shell 1 and the second hemispherical shell 2, the second hydraulic cylinder 29 clamps the first and second hemispherical shells 1 and 2 together. Simultaneously, the first hydraulic cylinder 7 and the auger rod 10 actuate, causing the filter cloth 3 to move and dewater the silt. The separated clean water falls back into the riverbed. After dewatering, the silt chunks are released at a designated location on the riverbank, such as directly onto a truck. This device creates a closed environment during the silt-scooping process, reducing the impact on surrounding silt and minimizing the stirring up of silt that mixes excessively with the river water.

[0068] After several uses, the filter cloth 3 should be cleaned. The excavator 30 can drive the first hemispherical shell 1 and the second hemispherical shell 2 to open and immerse the filter cloth 3 in the clean water of the river, thus simply cleaning it. Alternatively, the filter cloth 3 can be cleaned by spraying clean water with a nozzle next to the river; or it can be disassembled and thoroughly cleaned after multiple uses.

[0069] Installation process for cleaning or replacing filter cloth 3: First, connect the inner ring body 32 to the second disc body 52 with bolts. Then, place the second disc body 52 at the second end of the spacer column 53, and use the nut 57 to connect and tighten the stud 54 to fix the second disc body 52. ​​Finally, connect the outer ring body 31 to the annular seat 33 with bolts.

[0070] In some embodiments, rubber sealing gaskets are provided between the outer ring body 31 and the annular seat 33, and between the inner ring body 32 and the second disc body 52, to improve the sealing effect.

[0071] During the dewatering process of applying pressure to the sludge, it is difficult to ensure an absolute seal between the first hemispherical shell 1 and the second hemispherical shell 2, which are flipped and opened, and gaps often exist. Therefore, in this embodiment, the edges of the first hemispherical shell 1 and the second hemispherical shell 2 are provided with matching annular conical surfaces 14, or chamfered surfaces. The fit of the annular conical surfaces 14 of the two shells can reduce gaps. To enhance the sealing effect, the annular conical surface 14 of the first hemispherical shell 1 is provided with an outer annular groove 15, and a sealing ring 16 is provided inside the outer annular groove 15.

[0072] With the fit of the annular conical surface 14 and the setting of the sealing ring 16, the first hemispherical shell 1 and the second hemispherical shell 2 have good sealing performance during the process of the sludge being squeezed by the filter cloth 3 and the roll 5, preventing the water and sludge mixture from overflowing from the annular gap between the hemispheres, and allowing water to pass through the filter cloth 3 as much as possible, so as to achieve dewatering while ensuring the comprehensive treatment and collection of sludge.

[0073] During use, it was found that although the traditional protruding sealing ring 16 structure has a good sealing effect, the sealing position is where the hemispherical shell grabs the silt, which is the position where friction and wear are most severe. After a period of use, the protruding sealing ring 16 is very easy to wear, resulting in a decrease in sealing effect or even sealing failure.

[0074] Therefore, in this embodiment, the depth of the outer annular groove 15 can completely accommodate the sealing ring 16. Under its own deformation, the sealing ring 16 is retracted into the outer annular groove 15 and does not protrude from the annular conical surface 14.

[0075] Furthermore, an inner annular groove 17 is provided on the inner side of the edge of the first hemispherical shell 1. Several radial stepped holes 18 are provided between the inner annular groove 17 and the outer annular groove 15. The small end of the stepped hole 18 communicates with the outer annular groove 15, and the large end of the stepped hole 18 communicates with the inner annular groove 17. An annular first flexible band 19 is provided at the opening of the inner annular groove 17, and the first flexible band 19 seals the opening of the inner annular groove 17. An annular second flexible band 20 is provided at the bottom of the outer annular groove 15, and the second flexible band 20 seals the small end of the stepped hole 18. Oil is filled between the first flexible band 19 and the second flexible band 20.

[0076] The outer ring of the second flexible band 20 abuts against the sealing ring 16. When the interior of the hemispherical shell is empty, the elasticity of the sealing ring 16 applies force to the second flexible band 20, allowing the oil to pass through the stepped hole 18 and enter the inner annular groove 17. During the pressure application to the sludge inside the hemispherical shell, the sludge pressures the first flexible band 19, causing the oil to move through the stepped hole 18 into the outer annular groove 15. The oil then pushes the second flexible band 20 outward, expanding the sealing ring 16, causing it to protrude from the annular conical surface 14 of the first hemispherical shell 1 and abut against the annular conical surface 14 of the second hemispherical shell 2, thus achieving a seal. This ensures a good seal during pressure dehydration and reduces wear on the sealing ring 16 during sludge handling, protecting the sealing ring 16.

[0077] In some embodiments, a spring 21 is provided on the inner side of the large end of the stepped hole 18, and a top block 22 is connected to the inner end of the spring 21. The top block 22 abuts against the inner side of the first flexible strip 19. Relying on the elastic force of the spring 21, the first flexible strip 19 can be made concave, thereby better hiding the sealing ring 16. The silt needs to overcome the elastic force of the spring 21 during the process of applying pressure to the first flexible strip 19.

[0078] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic construction dredging apparatus, characterized in that, The application relates to a sludge filtering device, which comprises a first half-spherical shell (1) and a second half-spherical shell (2) for containing sludge, the first half-spherical shell (1) and the second half-spherical shell (2) are butted to form a complete spherical shell and seal the sludge on the inner side; the first half-spherical shell (1) and the second half-spherical shell (2) are both provided with a half-spherical shell-shaped filter cloth (3) on the inner side, the filter cloth (3) is provided with a winding drum (5) at the central part; the first half-spherical shell (1) and the second half-spherical shell (2) are both provided with a driving assembly for linearly moving and rotating the winding drum (5), the winding drum (5) rotates and receives the filter cloth (3) during the process of moving and pressing the sludge, so that the filter cloth (3) is wound outside the winding drum (5); the filter cloth (3) is wound and tightened to press the sludge, the winding drum (5) directly presses the sludge, the space between the filter cloths (3) is reduced, the sludge moves to the middle part of the complete spherical shell, and the water in the sludge is separated from the sludge through the filter cloth (3); the first half-spherical shell (1) and the second half-spherical shell (2) are both provided with a plurality of water leakage holes (13) at the lower part; A plurality of reinforcing strips (4) extending from the central part to the edge are uniformly distributed on the filter cloth (3); The filter cloth (3) is provided with an outer ring body (31) at the edge and an inner ring body (32) at the central part; the outer ring body (31) is connected with the inner side of the edge of the first half-spherical shell (1) or the second half-spherical shell (2) through bolts, and the inner ring body (32) is connected with the winding drum (5) through bolts; The winding drum (5) comprises a first disc body (51), a second disc body (52) and a spacing column (53) connected between the middle parts of the first disc body (51) and the second disc body (52), the second disc body (52) is close to the center of the complete spherical shell and the edge thereof is bent towards the center of the complete spherical shell; the filter cloth (3) surrounds the spacing column (53) at the central part and is connected with the middle part of the side of the second disc body (52) facing the first disc body (51); The first end of the spacing column (53) is fixedly connected with the first disc body (51); the second end of the spacing column (53) is connected with a prism (55), the outer side of the prism (55) is connected with a stud (54), the center of the second disc body (52) is provided with a polygonal hole (56) matched with the prism (55), and the outer side of the stud (54) is connected with a nut (57) for fixing the second disc body (52) through threads; The driving assembly comprises a screw rod (10), the center of the first half-spherical shell (1) and the center of the second half-spherical shell (2) are both provided with a screw hole (11) for the screw rod (10) to pass through; the inner end of the screw rod (10) is connected with the winding drum (5); The outer side of the first half-spherical shell (1) and the outer side of the second half-spherical shell (2) are provided with a support (6), a first hydraulic cylinder (7) and a movable plate (8), the first hydraulic cylinder (7) drives the movable plate (8) to move, the middle part of the movable plate (8) is rotatably connected with a cylindrical top rod (9), the top rod (9) is connected with the screw rod (10), and the support (6) is provided with a circular hole for the top rod (9) to pass through; The edges of the first half-spherical shell (1) and the second half-spherical shell (2) are provided with matched annular conical surfaces (14); the annular conical surface (14) of the first half-spherical shell (1) is provided with an outer annular groove (15), and the outer annular groove (15) is provided with a sealing ring (16); The first half shell (1) is internally provided with an inner annular groove (17), the inner annular groove (17) and the outer annular groove (15) are provided with a plurality of stepped holes (18), the inner annular groove (17) is provided with a first flexible band (19) at the groove opening, the bottom of the outer annular groove (15) is provided with a second flexible band (20), and the first flexible band (19) and the second flexible band (20) are filled with oil; the pressure of the sludge makes the sealing ring (16) protrude out of the outer annular groove (15); when the internal sludge is not under pressure, the sealing ring (16) is retracted into the outer annular groove (15); The first half shell (1) and the second half shell (2) are provided with hinged ears (24) and hangers hinged with the hinged ears (24) on the upper sides, the hangers are provided with a second hydraulic cylinder (29) for driving the first half shell (1) and the second half shell (2) to open and close; the first half shell (1) and the second half shell (2) form a grab bucket, the first half shell (1) and the second half shell (2) are turned to close to grab the sludge, and the first half shell (1) is separated from the second half shell (2) to discharge the dehydrated sludge block.

Images