Water conservancy construction dredging equipment

Abstract

The invention relates to the technical field of desilting, and discloses water conservancy construction desilting equipment which comprises a first hemispherical shell and a second hemispherical shell which are used for containing sludge, the first hemispherical shell and the second hemispherical shell are in butt joint to form a complete spherical shell, and the sludge is sealed on the inner side; hemispherical shell-shaped filter cloth is arranged on the inner side of each of the first hemispherical shell and the second hemispherical shell, and a winding drum is arranged in the center of each filter cloth in a penetrating manner; driving assemblies for driving the winding drum to linearly move and rotate are arranged in the middles of the first hemispherical shell and the second hemispherical shell, and the central part of the filter cloth linearly moves to the center of the complete spherical shell and rotates to extrude the sludge to dehydrate the sludge; a plurality of water leakage holes are formed in the lower parts of the first hemispherical shell and the second hemispherical shell; the two hemispherical shells are used for directly containing sludge, and meanwhile, the two hemispherical shell-shaped filter cloth rotates and moves in the center to extrude the internal sludge from two sides, so that sludge dehydration is realized, and the dehydration effect is good; and through separation of the two hemispherical shells, mud blocks after internal dehydration can be conveniently discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of dredging, and particularly to a dredging device for water conservancy construction. Background Art

[0002] During the process of water conservancy construction, river silt needs to be dehydrated into residue such as mud cakes or mud blocks. The main reasons for dehydrating and pressing the silt into solid mud residue are as follows: Facilitating transportation and disposal: Silt usually has a high water content and strong fluidity, and it is easy to leak during transportation, which will not only pollute the transportation tools but also may pollute the surrounding environment; after being pressed into mud residue, the water content is greatly reduced, the volume shrinks, and it becomes easy to handle and transport, which can effectively reduce transportation costs and environmental impacts. Reducing the risk of environmental pollution: Untreated silt may contain a large amount of harmful substances, such as heavy metals, organic substances, pathogens, etc.; if randomly stacked or discharged, these harmful substances are easily washed into the soil, water bodies and other environments through rainwater scouring, infiltration, etc., causing environmental pollution and ecological damage. Facilitating subsequent treatment and resource utilization: Silt in the form of mud residue is more suitable for further treatment and resource utilization; for example, by high-temperature incineration of the mud residue, reduction and harmlessness can be achieved, and the generated heat can also be used for power generation, etc.; some treated mud residues can also be used as raw materials for building materials, such as brick making, pottery making, etc., to realize the recycling of resources. Meeting relevant environmental protection standards and requirements: Pressing the silt into mud residue is a common pretreatment method, which helps to make the various indicators of the silt meet the environmental protection standards.

[0003] Common silt dehydration equipment includes: spiral sludge dehydration equipment, filter press dehydration equipment, vacuum belt dehydration equipment, centrifugal dehydration equipment, etc. For example, the patent of a dredging and solidification integrated equipment with the publication number of CN115650537B, and the patent of an efficient dehydration and volume reduction system for dredged sediment based on resource utilization with the publication number of CN118637804B; since the above-mentioned existing technology equipment needs to place the silt from the upper side, after the silt is dehydrated, it is inconvenient to take out the mud cake or mud block and other mud residues from the equipment, or auxiliary structures need to be used for auxiliary discharging; and mainly adopts the centrifugal method to realize silt dehydration. Compared with the traditional filter cloth pressing dehydration method, the separated water has a high impurity rate and the dehydration rate is limited. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the above-mentioned problems in the existing technology, and provide a dredging device for water conservancy construction.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A water conservancy construction dredging device includes a first hemispherical shell and a second hemispherical shell for accommodating silt. The first hemispherical shell and the second hemispherical shell are butted to form a complete spherical shell, sealing the silt inside; filter cloths in the shape of hemispherical shells are provided on the inner sides of the first hemispherical shell and the second hemispherical shell, and a winding drum is penetrated through the central part of the filter cloths; driving components for linearly moving and rotating the winding drum are provided in the middle parts of the first hemispherical shell and the second hemispherical shell, and the central parts of the filter cloths linearly move and rotate towards the center of the complete spherical shell, squeezing the silt to dehydrate it; a plurality of water leakage holes are provided at the lower parts of the first hemispherical shell and the second hemispherical shell.

[0006] Further, a plurality of reinforcing strips extending from the central part to the edge are evenly distributed in the circumferential direction on the filter cloth.

[0007] Further, an outer ring body is provided at the edge of the filter cloth, and an inner ring body is provided at the central part of the filter cloth; the outer ring body is connected to the inner side of the edge of the first hemispherical shell or the second hemispherical shell through bolts, and the inner ring body is connected to the winding drum through bolts.

[0008] Further, the winding drum includes a first disk body, a second disk body, and a spacer column connected between the middle parts of the first disk body and the second disk body. The second disk body is close to the center of the complete spherical shell, and its edge is bent towards the center of the complete spherical shell; the central part of the filter cloth surrounds the spacer column and is connected to the middle part of the side of the second disk body facing the first disk body.

[0009] Further, the first end of the spacer column is fixedly connected to the first disk body; a prism is connected to the second end of the spacer column, a stud is connected to the outside of the prism, a polygonal hole matching the prism is provided at the center of the second disk body, and a nut for fixing the second disk body is threadedly connected to the outside of the stud.

[0010] Further, the driving component includes a screw rod, and screw holes for the screw rod to pass through are provided at the centers of the first hemispherical shell and the second hemispherical shell; the inner end of the screw rod is connected to the winding drum.

[0011] Further, brackets, a first hydraulic cylinder, and a movable plate are provided on the outer sides of the first hemispherical shell and the second hemispherical shell. The first hydraulic cylinder drives the movable plate to move. A cylindrical ejector rod is rotatably connected to the middle of the movable plate. The ejector rod is connected to the screw rod, and a round hole for the ejector rod to pass through is provided on the bracket.

[0012] Further, matching annular conical surfaces are provided at the edges of the first hemispherical shell and the second hemispherical shell; an outer annular groove is provided on the annular conical surface of the first hemispherical shell, and a sealing ring is provided in the outer annular groove.

[0013] Further, an inner annular groove is provided on the inner side of the edge of the first hemispherical shell. A plurality of stepped holes are provided between the inner annular groove and the outer annular groove. An annular first flexible belt is provided at the notch of the inner annular groove, and an annular second flexible belt is provided at the bottom of the outer annular groove. Oil liquid is filled between the first flexible belt and the second flexible belt.

[0014] Furthermore, hinge ears and a suspension bracket hinged to the hinge ears are provided on the upper sides of the first hemispherical shell and the second hemispherical shell, and a second hydraulic cylinder for driving the first hemispherical shell and the second hemispherical shell to flip and open / close is provided on the suspension bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention directly uses two hemispherical shells to accommodate sludge, and at the same time, by the rotational movement of the centers of the two hemispherical shell-shaped filter cloths, the sludge inside is bilaterally squeezed to achieve sludge dehydration, and the dehydration effect is good; through the separation of the two hemispherical shells, it is convenient to discharge the mud blocks after internal dehydration; In the present invention, by rotating in the filter cloth and moving towards the sludge, the sludge space is squeezed and reduced, forcing the water in the sludge to separate from the sludge and pass through the filter cloth to achieve dehydration. The water separated by the filter cloth has few impurities, ensuring the dehydration rate; The filter cloth of the present invention has circumferentially evenly distributed reinforcing strips, which play a role in supporting and strengthening the filter cloth; the filter cloth is detachably installed in the hemispherical shell, facilitating replacement; The present invention adopts the matching structure of a screw rod and a screw hole. The first hydraulic cylinder drives the screw rod to move, so that while the center of the filter cloth is squeezed towards the sludge, rotation is synchronously achieved; The two hemispherical shells of the present invention have a sealing structure. Through the pressure of the sludge, the sealing ring is protruded by using a flexible belt and oil, avoiding leakage between the two hemispherical shells during pressurization; when there is no pressure inside, the sealing ring retracts into the outer annular groove, reducing the wear of the sealing ring; The two hemispherical shells of the present invention adopt a grab-type flipping and opening / closing structure, which is combined with an excavator to dehydrate the sludge while obtaining the sludge for dredging, reducing the transfer of the sludge, and realizing the sludge dehydration operation while performing the grabbing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0017] Figure 2 It is a side view schematic diagram of the present invention.

[0018] Figure 3 It is a three-dimensional schematic diagram of the lower side view in the butt-jointed state of the hemispherical shells of the present invention.

[0019] Figure 4 It is a three-dimensional internal structure schematic diagram of the butt-jointed state of the hemispherical shells of the present invention.

[0020] Figure 5 It is a schematic diagram of the inner side structure of the filter cloth of the present invention.

[0021] Figure 6 It is a schematic diagram of the internal structure of the second hemispherical shell of the present invention.

[0022] Figure 7 Schematic diagram of the external structure of the second hemispherical shell of the present invention.

[0023] Figure 8 Schematic diagram of the outer side structure of the filter cloth of the present invention.

[0024] Figure 9 Schematic diagram of the filter cloth driving structure of the present invention.

[0025] Figure 10 Schematic diagram of the sealing structure of the present invention.

[0026] Figure 11 Schematic diagram of the three-dimensional structure of the first hemispherical shell of the present invention.

[0027] Figure 12 Schematic diagram of the cooperation state of the present invention with an excavator.

[0028] In the figure: 1. First hemispherical shell; 2. Second hemispherical shell; 3. Filter cloth; 4. Reinforcing strip; 5. Drum; 6. Bracket; 7. First hydraulic cylinder; 8. Movable plate; 9. Push rod; 10. Screw rod; 11. Screw hole; 12. Limit disk; 13. Water leakage hole; 14. Annular conical surface; 15. Outer annular groove; 16. Sealing ring; 17. Inner annular groove; 18. Step hole; 19. First flexible belt; 20. Second flexible belt; 21. Spring; 22. Top block; 23. Grabbing tooth; 24. Hinge ear; 25. Top plate; 26. Suspension ear; 27. Swing rod; 28. Lifting plate; 29. Second hydraulic cylinder; 30. Excavator; 31. Outer ring body; 32. Inner ring body; 33. Annular seat. 51. First disk body; 52. Second disk body; 53. Spacer column; 54. Stud; 55. Prism; 56. Polygonal hole; 57. Nut. Specific embodiments

[0029] The following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Specific embodiments of the dredging equipment for water conservancy construction provided by the present invention: Please refer to the attached Figures 1 - 12 , the dredging equipment for water conservancy construction includes a first hemispherical shell 1 and a second hemispherical shell 2 for accommodating silt. The first hemispherical shell 1 and the second hemispherical shell 2 are butted to form a complete spherical shell, and the silt is sealed inside.

[0031] In this embodiment, the first hemispherical shell 1 and the second hemispherical shell 2 form a grab. By the flipping and opening and closing of the first hemispherical shell 1 and the second hemispherical shell 2, it is driven by an external device to move up and down and can directly grab the silt in the river channel.

[0032] When the first hemispherical shell 1 and the second hemispherical shell 2 are butted and closed, their circular openings are located in a vertical plane, and the openings face the horizontal side.

[0033] In the butted and closed state, hinge ears 24 are provided on the upper sides of the first hemispherical shell 1 and the second hemispherical shell 2, and a hanging bracket hinged to the hinge ears 24. The number of hinge ears 24 is two, and they are respectively connected to the upper sides of the first hemispherical shell 1 and the second hemispherical shell 2.

[0034] Each hinge ear 24 has two hinge holes, and the hinge holes are not lower than the upper ends of the first hemispherical shell 1 and the second hemispherical shell 2. The hanging bracket includes a top plate 25. On the upper side of the middle of the top plate 25, a lifting lug 26 is provided, and it can be connected to external equipment through the lifting lug 26. In this embodiment, the hanging bracket is connected to the excavator 30 through the lifting lug 26, and the excavator 30 drives to grab the silt in the river channel. The subsequent hydraulic cylinder is connected to the hydraulic station of the excavator 30 through a flexible oil pipe to realize the action of the subsequent hydraulic cylinder.

[0035] Two swing rods 27 are hinged to the lower sides of both ends of the top plate 25, and the lower ends of the two swing rods 27 are respectively hinged to the two hinge ears 24. A lifting plate 28 is provided below the top plate 25, and both ends of the lifting plate 28 are respectively hinged to the two hinge ears 24.

[0036] A second hydraulic cylinder 29 for driving the first hemispherical shell 1 and the second hemispherical shell 2 to flip and open is provided on the hanging bracket; 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, and then the upper ends of the hinge ears 24 flip downward, causing the two swing rods 27 to swing outward, and then the first hemispherical shell 1 and the second hemispherical shell 2 flip and separate to open.

[0037] When the second hydraulic cylinder 29 shortens, the lifting plate 28 rises, and then the upper ends of the hinge ears 24 flip upward. The first hemispherical shell 1 and the second hemispherical shell 2 flip, and the lower ends approach each other to grab the silt. Finally, the openings of the first hemispherical shell 1 and the second hemispherical shell 2 are opposite to each other for docking, as shown in Figure 1 、 Figure 2 and Figure 4 states, and they are docked into a complete spherical shell, and a closed cavity for accommodating silt is formed inside.

[0038] In order to enable the first hemispherical shell 1 and the second hemispherical shell 2 to penetrate deep into the silt during the process of grabbing the silt, so that the silt fills the inside of the complete spherical shell. A number of grab teeth 23 are provided on the outer sides of the lower parts of the first hemispherical shell 1 and the second hemispherical shell 2, and the grab teeth 23 of the first hemispherical shell 1 and the second hemispherical shell 2 are staggered and corresponding.

[0039] The grab teeth 23 not only facilitate the docking of the first hemispherical shell 1 and the second hemispherical shell 2, but also easily insert into the interior of the silt during the process of grabbing the silt, making the silt-grabbing action smoother, improving work efficiency, and enabling the interior of the complete spherical shell to be filled with silt, facilitating subsequent pressure application to the silt for dehydration.

[0040] Filter cloths 3 in the shape of hemispherical shells are provided on the inner sides of both the first hemispherical shell 1 and the second hemispherical shell 2. A winding drum 5 is passed through the central part of the filter cloth 3. When the winding drum 5 rotates, the filter cloth 3 can be twisted and wound around the outer side of the winding drum 5. The edge of the filter cloth 3 is hermetically connected to the inner side of the opening edge of the first hemispherical shell 1 or the second hemispherical shell 2, and the winding drum 5 is hermetically connected to the central part of the filter cloth 3; there is a gap between the other parts of the filter cloth 3, that is, the annular area between the center and the edge and the interior of the hemispherical shell.

[0041] Driving components for linearly moving and rotating the winding drum 5 are provided in the middle parts of both the first hemispherical shell 1 and the second hemispherical shell 2. The central part of the filter cloth 3 linearly moves towards the center of the complete spherical shell and rotates to squeeze the silt for dehydration. During this process, the rotation of the winding drum 5 drives the rotation of the center of the filter cloth 3. Since the outer edge of the filter cloth 3 is connected to the inner side of the hemispherical shell edge and cannot rotate, the rotation of the center of the filter cloth 3 generates torsion, and thus the filter cloth 3 forms a squeezing effect on the silt. At the same time, the winding drum 5 moves from the central position towards the silt and directly applies pressure to the silt, promoting the water in the silt to pass through the filter holes of the filter cloth 3 and enter the inner side of the hemispherical shell.

[0042] In order to quickly drain the water, a number of water leakage holes 13 are provided at the lower parts of both the first hemispherical shell 1 and the second hemispherical shell 2. The water filtered through the filter cloth 3 can be quickly drained through the water leakage holes 13 to avoid water accumulation.

[0043] The driving component includes a screw rod 10. Screw holes 11 for the screw rod 10 to pass through are provided in the centers of both the first hemispherical shell 1 and the second hemispherical shell 2; the inner end of the screw rod 10 is connected to the winding drum 5. When the screw rod 10 is pushed towards the interior of the hemispherical shell on the outside, during the process of the screw rod 10 passing through the screw hole 11, the screw rod 10 rotates due to the effect of the screw hole 11. Therefore, during the process of the winding drum 5 moving towards the silt to apply pressure, the winding drum 5 rotates to wind up the filter cloth 3, making the filter cloth 3 wind around the outer side of the winding drum 5. The winding and tightening of the filter cloth 3 apply pressure to the silt, and together with the direct pressure of the winding drum 5 on the silt, the space between the two filter cloths 3 is reduced, forcing the silt to move towards the middle of the complete spherical shell, continuously reducing its volume, and thus enabling the water in the silt to pass through the filter cloth 3 and separate from the silt to achieve dehydration.

[0044] During the process of pulling out the screw rod 10, the screw rod 10 drives the winding drum 5 to rotate in the reverse direction, releasing the wound filter cloth 3, resetting the filter cloth 3, and moving the center of the filter cloth 3 towards the inner side of the middle of the hemispherical shell until it fits against the inner side of the hemispherical shell.

[0045] In order to realize the push-pull movement of the screw rod 10. On the outer sides of the first hemispherical shell 1 and the second hemispherical shell 2, there are a U-shaped bracket 6, a first hydraulic cylinder 7 and a movable plate 8. The U-shaped bracket 6 is horizontally arranged, with its U-shaped opening facing the hemispherical shell, and its open end is connected to the hemispherical shell.

[0046] On the outer sides of both the first hemispherical shell 1 and the second hemispherical shell 2, there are two first hydraulic cylinders 7. The telescopic end of the first hydraulic cylinder 7 passes 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 end of the first hydraulic cylinder 7 is connected to the movable plate 8 and drives the movable plate 8 to move.

[0047] A cylindrical ejector rod 9 is rotatably connected to the middle of the movable plate 8. Specifically, a round hole is provided in the middle of the movable plate 8. The outer end of the ejector rod 9 passes through the round hole. On the outer side of the outer end of the ejector rod 9, there are two circular limit discs 12. There is a gap between the two limit discs 12, and the two limit 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 ejector rod 9 can move linearly and can also rotate passively.

[0048] The inner end of the ejector rod 9 is oppositely connected to the outer end of the screw rod 10. A round hole is provided in the middle of the bracket 6, and the ejector rod 9 passes through the round hole in the middle of the bracket 6. The ejector rod 9 can rotate selflessly in the round hole in the middle of the bracket 6. Since the ejector rod 9 is connected to the screw rod 10, the first hydraulic cylinder 7 reciprocates the ejector rod 9 through the movable plate 8, and the ejector rod 9 drives the screw rod 10 to reciprocate and pass through the spiral hole 11. During the process of passing through the spiral hole 11, the screw rod 10 rotates, driving the ejector rod 9 to rotate selflessly. The ejector rod 9 can rotate at both the bracket 6 and the movable plate 8, ensuring smooth push-pull of the screw rod 10.

[0049] A number of reinforcing strips 4 extending from the central part to the edge are evenly distributed on the circumference of the filter cloth 3. The reinforcing strips 4 are made of a rope body that can be wound but has a very small amount of expansion and contraction, such as a thin steel wire rope. The reinforcing strips 4 improve the strength of the filter cloth 3 and form a framework to provide a certain supporting effect on the filter cloth 3.

[0050] The winding drum 5 includes a first disk body 51, a second disk body 52, and a spacer column 53 connected between the middles of the first disk body 51 and the second disk body 52. The central part of the filter cloth 3 surrounds the spacer column 53 and is connected to the middle of the side of the second disk body 52 facing the first disk body 51. A space for winding the filter cloth 3 and accommodating the wound filter cloth 3 is formed outside the spacer column 53 between the first disk body 51 and the second disk body 52.

[0051] Both the first disk body 51 and the second disk body 52 are circular disk-like structures, and the spacer column 53 is a cylindrical structure. The second disk body 52 is close to the center of the complete spherical shell, and the edge of the second disk body 52 bends towards the center of the complete spherical shell; the bending of the second disk body 52 can better adapt to the winding and torsional deformation of the filter cloth 3, making the fit between the filter cloth 3 and the sludge more smooth in a curve, which is beneficial to the full dehydration of the sludge.

[0052] One end of the spacer post 53 is fixedly connected to the first disc body 51. One side of the first disc body 51 is connected to the spacer post 53, and the other side is connected to the screw rod 10. The other end of the spacer post 53 is detachably connected to the second disc body 52. Specifically, a prism 55 is connected to the other end of the spacer post 53. The prism 55 is a hexagonal columnar structure. A stud 54 is connected to the outside of the prism 55. A polygonal hole 56 that cooperates with the prism 55 is provided at the center of the second disc body 52. The polygonal hole 56 is a hexagonal through hole. The cooperation between the prism 55 and the polygonal hole 56 can drive the second disc body 52 to rotate, preventing the second disc body 52 from slipping and being unable to rotate under pressure.

[0053] A nut 57 that fixes the second disc body 52 is threadedly connected to the outside of the stud 54. By tightening the second nut 57, the second disc body 52 can be fixed to the other end of the spacer post 53.

[0054] An outer ring body 31 is provided at the edge of the filter cloth 3, and an inner ring body 32 is provided at the central part of the filter cloth 3; the outer ring body 31 is bolted to the inner side of the edge of the first hemispherical shell 1 or the second hemispherical shell 2, and the inner ring body 32 is bolted to the winding drum 5. The detachable connection structure of the filter cloth 3 enables the filter cloth 3 to be replaced.

[0055] Circular seats 33 are provided on the inner sides of the opening edges of the first hemispherical shell 1 and the second hemispherical shell 2. A number of bolts are evenly arranged in a circle on the outer ring body 31, and threaded holes that cooperate with the bolts are provided on the circular seats 33, enabling the outer ring body 31 and the circular seats 33 to be both connected and separated.

[0056] A number of threaded holes are evenly distributed in a circle at the middle part of the second disc body 52. The inner ring body 32 is located on the side of the second disc body 52 facing the first disc body 51. A number of bolts are evenly arranged in a circle on the inner ring body 32. The bolts on the inner ring body 32 are connected to the threaded holes of the second disc body 52, enabling the inner ring body 32 and the second disc body 52 to be both connected and separated.

[0057] After the sludge is dewatered, the sludge is pressed into a flat spherical mud block. The second hydraulic cylinder 29 causes the first hemispherical shell 1 and the second hemispherical shell 2 to flip open, allowing the mud block to be directly discharged, and the discharge operation of the mud block is very convenient. If the mud block adheres to the inner side of the first hemispherical shell 1 or the second hemispherical shell 2, during the process of discharging the mud block, the ejector rod 9 and the screw rod 10 are linearly moved and rotated to push the mud block outward and downward, thereby avoiding the phenomenon that the mud block adheres and cannot fall; therefore, this device can easily overcome the problem of inconvenient discharge of the mud block.

[0058] During the process of scooping up silt in the river channel, when the excavator 30 lifts the first hemispherical shell 1 and the second hemispherical shell 2, the second hydraulic cylinder 29 makes the first hemispherical shell 1 and the second hemispherical shell 2 dock and press tightly. At the same time, the first hydraulic cylinder 7 and the screw rod 10 act to make the filter cloth 3 act to achieve silt dehydration, and the separated clean water falls back into the river channel. After dehydration, the mud blocks are released at a designated position on the river bank, such as directly released onto a truck. During the process of scooping up silt by this device, a closed environment is formed, reducing the impact on the surrounding silt, and reducing the silt from being stirred up and mixed in a large amount in the river water.

[0059] After using it several times, clean the filter cloth 3. The excavator 30 can drive the first hemispherical shell 1 and the second hemispherical shell 2 to open and immerse in the clear water of the river channel and shake to simply clean the filter cloth 3. It is also possible to use a spray head to spray clean water to clean the filter cloth 3 beside the river channel; or disassemble the filter cloth 3 for thorough cleaning after using it multiple times.

[0060] Installation process after cleaning or replacing the damaged filter cloth 3: First, connect the inner ring body 32 and 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 with the stud 54 to fix the second disc body 52. Finally, connect the outer ring body 31 and the annular seat 33 with bolts.

[0061] In some embodiments, rubber 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.

[0062] During the dehydration process of pressing on the silt, it is difficult to ensure absolute sealing and tight fitting between the first hemispherical shell 1 and the second hemispherical shell 2 that are flipped and opened and closed, and there are often gaps. Therefore, in this embodiment, annular tapered surfaces 14, also known as chamfered surfaces, are provided at the edges of the first hemispherical shell 1 and the second hemispherical shell 2, and the annular tapered surfaces 14 of the two fit together, which can reduce the gaps. To enhance the sealing effect, an outer annular groove 15 is provided on the annular tapered surface 14 of the first hemispherical shell 1, and a sealing ring 16 is provided in the outer annular groove 15.

[0063] Through the fitting of the annular tapered surfaces 14 and the setting of the sealing ring 16, during the process of the silt being squeezed by the filter cloth 3 and the drum 5, there is good sealing between the first hemispherical shell 1 and the second hemispherical shell 2, avoiding the overflow of the water and silt mixture from the annular gap between the hemispherical shells, and making the water pass through the filter cloth 3 as much as possible. While achieving dehydration, it ensures the comprehensive treatment and collection of the silt.

[0064] It is found in use that adopting the traditional protruding sealing ring 16 structure, although it has a good sealing effect, this sealing position is the position where the hemispherical shell scoops up silt, which is the position with the most serious friction and wear. After using it for a period of time, the protruding sealing ring 16 is extremely easy to wear, resulting in a decline in the sealing effect or even sealing failure.

[0065] Therefore, in this embodiment, the depth of the outer annular groove 15 can completely accommodate the sealing ring 16 , and the sealing ring 16 shrinks into the outer annular groove 15 under the effect of its own deformation, and does not protrude outside the annular cone surface 14 .

[0066] An inner annular groove 17 is provided on the inner side of the edge of the first hemispherical shell 1, and a plurality of radial stepped holes 18 are provided between the inner annular groove 17 and the outer annular groove 15, wherein the small end of the stepped hole 18 is connected to the outer annular groove 15, and the large end of the stepped hole 18 is connected to the inner annular groove 17. An annular first flexible belt 19 is provided at the notch of the inner annular groove 17, and the first flexible belt 19 seals the notch of the inner annular groove 17, and an annular second flexible belt 20 is provided at the bottom of the outer annular groove 15, and the second flexible belt 20 seals the small end of the stepped hole 18, and oil is filled between the first flexible belt 19 and the second flexible belt 20.

[0067] The outer ring side of the second flexible belt 20 contacts the sealing ring 16, so that when the interior of the hemispherical shell is empty, the elastic force of the sealing ring 16 itself is applied to the second flexible belt 20, and the second flexible belt 20 allows the oil to pass through the stepped hole 18 and enter the inner annular groove 17. When the hemispherical shell applies pressure to the sludge, the sludge applies pressure to the first flexible belt 19, and the first flexible belt 19 allows the oil to pass through the stepped hole 18 and move into the outer annular groove 15. The oil causes the second flexible belt 20 to move outward, expand and expand the sealing ring 16, so that the sealing ring 16 protrudes from the annular cone surface 14 of the first hemispherical shell 1 and contacts the annular cone surface 14 of the second hemispherical shell 2, thereby achieving sealing. In this way, the sealing effect during pressure dehydration can be ensured, and the wear of the sealing ring 16 by the sludge can be reduced when the sludge is captured, and the sealing ring 16 can be protected.

[0068] 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 contacts the inner side of the first flexible belt 19. Relying on the elastic force of the spring 21, the first flexible belt 19 can be concave, thereby better hiding the sealing ring 16. The elastic force of the spring 21 needs to be overcome in the process of applying pressure to the first flexible belt 19.

[0069] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dredging equipment for water conservancy construction, characterized in that: The invention comprises a first hemispherical shell (1) and a second hemispherical shell (2) for accommodating sludge, wherein the first hemispherical shell (1) and the second hemispherical shell (2) are butted together to form a complete spherical shell and seal the sludge inside; a hemispherical shell-shaped filter cloth (3) is provided inside the first hemispherical shell (1) and the second hemispherical shell (2), and a reel (5) is passed through the center of the filter cloth (3); a driving assembly for causing the reel (5) to move linearly and rotate is provided in the middle of the first hemispherical shell (1) and the second hemispherical shell (2), and the center of the filter cloth (3) moves linearly toward the center of the complete spherical shell and rotates, squeezing the sludge to dehydrate the sludge; and a plurality of water leakage holes (13) are provided at the bottom of the first hemispherical shell (1) and the second hemispherical shell (2).

2. The water conservancy construction dredging equipment according to claim 1, characterized in that: A plurality of reinforcement strips (4) extending from the center to the edge are evenly distributed on the circumference of the filter cloth (3).

3. The water conservancy construction dredging equipment according to claim 1 or 2, characterized in that: An outer ring body (31) is provided at the edge of the filter cloth (3), and an inner ring body (32) is provided at the center of the filter cloth (3); the outer ring body (31) is connected to the inner side of the edge of the first hemispherical shell (1) or the second hemispherical shell (2) by bolts, and the inner ring body (32) is connected to the reel (5) by bolts.

4. The water conservancy construction dredging equipment according to claim 1, characterized in that: The reel (5) comprises a first disc (51), a second disc (52), and a spacer column (53) connected between the middle parts of the first disc (51) and the second disc (52); the second disc (52) is close to the center of the complete spherical shell, and its edge is bent toward the center of the complete spherical shell; the center part of the filter cloth (3) surrounds the spacer column (53) and is connected to the middle part of the side of the second disc (52) facing the first disc (51).

5. The water conservancy construction dredging equipment according to claim 4, characterized in that: The first end of the spacer column (53) is fixedly connected to the first disk body (51); the second end of the spacer column (53) is connected to a prism (55); the outer side of the prism (55) is connected to a stud (54); the center of the second disk body (52) is provided with a polygonal hole (56) matching with the prism (55); the outer side of the stud (54) is threadedly connected to a nut (57) that fixes the second disk body (52).

6. The water conservancy construction dredging equipment according to claim 1, characterized in that: The driving assembly comprises a spiral rod (10); a spiral hole (11) for the spiral rod (10) to pass through is provided at the center of each of the first hemispherical shell (1) and the second hemispherical shell (2); and the inner end of the spiral rod (10) is connected to the winding drum (5).

7. The water conservancy construction dredging equipment according to claim 6, characterized in that: A bracket (6), a first hydraulic cylinder (7) and a movable plate (8) are provided on the outside of the first hemispherical shell (1) and the second hemispherical shell (2); the first hydraulic cylinder (7) drives the movable plate (8) to move; a cylindrical push rod (9) is rotatably connected to the middle of the movable plate (8); the push rod (9) is connected to a spiral rod (10); and a circular hole is provided on the bracket (6) for the push rod (9) to pass through.

8. The water conservancy construction dredging equipment according to claim 1, characterized in that: The edges of the first hemispherical shell (1) and the second hemispherical shell (2) are provided with matching annular conical surfaces (14); an outer annular groove (15) is provided on the annular conical surface (14) of the first hemispherical shell (1), and a sealing ring (16) is provided in the outer annular groove (15).

9. The water conservancy construction dredging equipment according to claim 8, characterized in that: An inner annular groove (17) is provided on the inner side of the edge of the first hemispherical shell (1), a plurality of stepped holes (18) are provided between the inner annular groove (17) and the outer annular groove (15), an annular first flexible belt (19) is provided at the groove opening of the inner annular groove (17), an annular second flexible belt (20) is provided at the groove bottom of the outer annular groove (15), and oil is filled between the first flexible belt (19) and the second flexible belt (20).

10. The water conservancy construction dredging equipment according to claim 1, characterized in that: The upper sides of the first hemispherical shell (1) and the second hemispherical shell (2) are provided with hinged ears (24) and a hanger hinged to the hinged ears (24), and the hanger is provided with a second hydraulic cylinder (29) for driving the first hemispherical shell (1) and the second hemispherical shell (2) to flip and open.

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