Sludge pre-precipitation device for environment-friendly dredging

Abstract

The invention discloses a sludge pre-precipitation device for environment-friendly dredging, which belongs to the technical field of environment-friendly dredging and comprises a grit chamber, a water inlet pipe and a water outlet pipe. A rotating shaft is rotationally arranged on the supporting plate through a bearing, and a plurality of impellers with adjustable heights are arranged on the rotating shaft; the fixing mechanism is used for limiting and fixing the impellers adjusted to different heights; according to the scheme, mud sewage flows in from the tangential direction of the inner wall of the grit chamber and can automatically form rotational flow along the inner wall of the grit chamber, and the rotating shaft and the impeller are driven to rotate by the driving mechanism, so that the sewage mud can spirally flow, separation of organic matters and sand grains is promoted, the separation efficiency is improved, and the subsequent treatment period is shortened; the impeller can be driven to move up and down to adjust the position by releasing the fixation of the impeller by the fixing mechanism, and the position of the impeller can be adjusted according to different grit treatment requirements of the grit chamber, so that the effect of separating sand from organic matters and water is better.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection dredging, and more specifically, relates to a sludge pre-sedimentation device for environmental protection dredging. Background Art

[0002] Environmental dredging is a solution to treat river pollution. Environmental dredging aims to remove polluted sediments in rivers and lakes, reduce the release of endogenous pollution, and reduce water pollution. Environmental dredging combined with ecological restoration has the characteristics of environmental dredging, while creating conditions for the restoration of aquatic ecosystems and improving the environment of shallow rivers and lakes. The advantage of underwater environmental dredging is that it is highly targeted and can quickly achieve the goal of reducing pollutants.

[0003] At present, the environmental protection dredging construction machinery is relatively extensive. During the construction process, the bottom mud is disturbed by the dredging construction equipment and the underwater sludge is extracted. The mud brought ashore has a high water content. Generally, the mud is pumped into the sedimentation tank for a long time of static sedimentation, and then passed into the regulating tank and equalization tank for treatment. However, the sludge sedimentation takes a long time, which will prolong the subsequent treatment period; and the failure to quickly precipitate will increase the burden of subsequent tailwater treatment.

[0004] At present, there are also cyclone grit chambers to pre-treat the slurry. The sand particles with a relatively large relative density are thrown to the wall of the chamber and sink to the bottom under the action of gravity; while the lighter organic matter is separated from the sand and carried out of the chamber with the vortex of the outlet water. However, the impeller position in this equipment is fixed and cannot be adjusted according to different grit treatment requirements. It has poor flexibility, limited usage, and cannot achieve the best treatment effect.

[0005] Therefore, it is necessary to provide a sludge pre-sedimentation device for environmental protection dredging to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a sludge pre-sedimentation device for environmental protection dredging to solve the above technical problems.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A sludge pre-sedimentation device for environmental dredging, comprising a sand settling tank, and further comprising:

[0009] The water inlet pipe and the water outlet pipe are both arranged on the grit chamber and communicated with the interior of the grit chamber;

[0010] A support plate is arranged on the top of the sand settling tank, a rotating shaft is rotatably arranged on the support plate through a bearing, and a plurality of impellers with adjustable heights are arranged on the rotating shaft;

[0011] A driving mechanism, disposed on the support plate, for driving the rotating shaft to rotate;

[0012] The fixing mechanism is arranged on the rotating shaft and is used for limiting and fixing the impeller adjusted to different heights.

[0013] Furthermore, a sleeve is provided on the outer wall of the rotating shaft, and a plurality of impellers are evenly arranged on the sleeve. A plurality of fixing holes are provided on the inner wall of the sleeve.

[0014] Furthermore, a transmission cavity is provided inside the rotating shaft, and the fixing mechanism includes:

[0015] A telescopic member is arranged on the inner wall of the transmission cavity, and a moving rod is arranged at the telescopic end of the telescopic member;

[0016] A plurality of block groups are arranged at different heights on the rotating shaft, each of the block groups includes a plurality of fixed blocks that movably penetrate the outer wall of the rotating shaft and are adapted to the fixed holes;

[0017] A plurality of connecting rods have one end hinged to each of the fixing blocks and the other end hinged to the rotating shaft.

[0018] Furthermore, the driving mechanism includes a first driving member arranged on the supporting plate, a gear is arranged at an output end of the first driving member, and a gear ring meshing with the gear is arranged on an outer wall of the rotating shaft.

[0019] Furthermore, the outer wall of the collar is provided with a plurality of mounting blocks, a slot is provided in the mounting block, a through hole is provided on the mounting block, an insert plate matched with the slot is provided on the impeller, and a mounting hole matched with the through hole is provided on the insert plate.

[0020] Furthermore, it also includes a top plate arranged at the end of the rotating shaft, a through cavity is opened in the rotating shaft, a through hole communicating with the through cavity is opened on the top plate, and a lifting component for driving the ring to move up and down is arranged on the top plate.

[0021] Furthermore, the lifting component includes two support plates arranged on the top plate, a rotating rod is rotatably arranged between the two support plates, a second driving component connected to the rotating rod is provided on the support plate, a rope winding wheel is provided on the outer wall of the rotating rod, a first traction rope is wound on the rope winding wheel, a plurality of second traction ropes are provided at the movable end of the first traction rope, and the other end of the second traction rope is connected to the ring.

[0022] Furthermore, a plurality of brackets are provided on the outer wall of the rotating shaft, and steering wheels are rotatably provided on the brackets for steering the second traction rope.

[0023] Furthermore, a grille is provided in the water outlet pipe, a mounting opening is provided at a position of the water outlet pipe corresponding to the grille, a cover plate is hinged at the mounting opening, and a limiting component for limiting the grille is provided in the mounting opening.

[0024] Furthermore, the restriction component includes:

[0025] An inner recessed groove is provided on the side wall of the installation opening, and a limiting block is slidably arranged in the inner recessed groove;

[0026] An elastic member has one end connected to the limiting block and the other end connected to the inner wall of the sunken groove.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In this scheme, muddy sewage flows in from the tangential direction of the inner wall of the grit chamber, and a vortex is formed along its inner wall. The sand particles are thrown to the wall of the chamber and sink to the bottom under the action of gravity. The lighter organic matter is separated from the sand and discharged from the outlet pipe along with the water flow, thereby achieving the pretreatment effect of solid-liquid separation in the mud. At the same time, the driving mechanism drives the rotating shaft and the impeller to rotate, so that the sewage slurry can flow in a spiral shape, increasing the vortex effect in the grit chamber, and better separating the sand particles with a relatively large density from the organic matter and water, thereby accelerating the separation efficiency, reducing the treatment period, and reducing the cost and period risk of subsequent mud dehydration treatment.

[0029] 2. This solution releases the fixing mechanism on the impeller, and then drives the impeller to move up and down along the rotating shaft, that is, adjusts the height position of the impeller on the rotating shaft. After the adjustment, the impeller is fixed by the fixing mechanism. The position of the impeller can be adjusted according to the different grit treatment requirements of the grit settling tank. It has strong flexibility and is not restricted in use, thereby achieving the best separation effect of organic matter and sand particles, greatly increasing the effect of the vortex in the grit settling tank, and achieving a better separation effect of sand particles, organic matter and water.

[0030] 3. In this solution, the impeller can be disassembled and installed, avoiding the current situation where the impeller is fixed on the shaft. It is convenient for the subsequent inspection and replacement of the impeller without the need to use other tools for violent cutting, dismantling and welding installation, which saves time and effort while reducing damage to the shaft and impeller. At the same time, impellers of different specifications can be replaced according to different needs, so that they can be adjusted under different occasions and processing requirements, which is highly practical.

[0031] 4. In this scheme, after the fixing mechanism for the impeller is released, the position of the collar can be adjusted by moving it up and down through the lifting component, without the need for the staff to operate manually or use other tools, thus saving a lot of labor and time and improving work efficiency. When the impeller needs to be repaired or replaced, the impeller can be raised to the highest point through the lifting component, and the staff can operate it from the top of the sand settling tank without having to enter the interior of the sand settling tank for operation, thus saving time and effort and improving work efficiency.

[0032] 5. In this solution, leaves and other floating objects on the water flow will be blocked by the grille in the outlet pipe, which can prevent leaves and other floating objects from flowing out with the water, filter floating objects, improve the subsequent treatment effect of the water flow, and improve the practicality of this device. After using it for a period of time, the grille can be taken out from the outlet pipe for cleaning or replacement, which is convenient and fast, saving time and effort, and improving the performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the external structure of the grit chamber of the present invention;

[0034] Figure 2 It is a schematic diagram of the internal structure of the grit chamber of the present invention;

[0035] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0036] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0037] Figure 5 for Figure 2 The enlarged structural diagram at C in the middle;

[0038] Figure 6 It is a schematic diagram of the exploded structure of the components on the impeller and the collar of the present invention;

[0039] Figure 7 It is a schematic diagram of a partial cross-sectional structure of the rotating shaft of the present invention;

[0040] Figure 8 for Figure 7 The enlarged structural diagram at D in the middle;

[0041] Fig. 9 for Figure 7 The enlarged structural diagram at E in the middle;

[0042] Fig.10 This is a schematic structural diagram of the cover plate of the water outlet pipe of the present invention in an open state;

[0043] Description of the numbers in the figure:

[0044] 1. Sand settling tank; 2. Water inlet pipe; 3. Water outlet pipe; 4. Support plate; 5. Rotating shaft; 6. Impeller; 7. Driving mechanism; 71. First driving member; 72. Gear; 73. Gear ring; 8. Fixing mechanism; 81. Telescopic member; 82. Moving rod; 83. Fixing block; 84. Connecting rod; 9. Ring; 10. Fixing hole; 11. Transmission cavity; 12. Mounting block; 13. Slot; 14. Through hole; 15. Insert plate; 16. Mounting hole; 17. Top plate; 18. Through cavity; 19. Through hole; 20. Lifting component; 201. Support plate; 202. Turning rod; 203. Second driving member; 204. Rope winding wheel; 205. First traction rope; 206. Second traction rope; 21. Bracket; 22. Steering wheel; 23. Grille; 24. Mounting port; 25. Cover plate; 26. Limiting assembly; 261. Inner recessed groove; 262. Limiting block; 263. Elastic member; 27. Stop block. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-4 and Figure 6-7 A sludge pre-sedimentation device for environmental dredging includes a grit chamber 1, and also includes: an inlet pipe 2 and an outlet pipe 3, both of which are arranged on the grit chamber 1 and communicated with the interior thereof; a support plate 4, arranged on the top of the grit chamber 1, a rotating shaft 5 is rotatably arranged on the support plate 4 through a bearing, and a plurality of impellers 6 with adjustable heights are arranged on the rotating shaft 5; a driving mechanism 7, arranged on the support plate 4, and used to drive the rotating shaft 5 to rotate; a fixing mechanism 8, arranged on the rotating shaft 5, and used to limit and fix the impeller 6 adjusted to different heights.

[0047] When in use, the muddy sewage is introduced into the grit chamber 1 through the water inlet pipe 2, and the sewage flows in from the tangential direction of the inner wall of the grit chamber 1. The grit chamber 1 can use a part of the hydraulic force of the pump to suck the mud to form a vortex along its inner wall. The sand particles are thrown to the wall of the chamber and sink to the bottom under the action of gravity. The lighter organic matter is separated from the sand and discharged from the outlet pipe 3 along with the water flow, so as to achieve the effect of solid-liquid separation in the mud, that is, to achieve the pretreatment of the mud. At the same time, the driving mechanism 7 drives the rotating shaft 5 to rotate, and the rotating shaft 5 drives the impeller 6 to rotate. The sewage water slurry flows in a spiral shape through the impeller 6, which can further promote the separation of organic matter and sand particles, and increase the effect of the vortex in the grit chamber 1, so that the sand particles with a relatively large relative density can be better separated from the organic matter and water. Therefore, the sewage water slurry can be pretreated by cyclone separation, the sand separation efficiency can be accelerated, the subsequent treatment period can be reduced, and the cost and period risk of the subsequent mud dehydration treatment can be reduced, and the use effect is good.

[0048] The fixing of the impeller 6 by the fixing mechanism 8 can be released, and then the impeller 6 can be driven to move up and down along the rotating shaft 5, that is, the height position of the impeller 6 on the rotating shaft 5 is adjusted. After the adjustment, the impeller 6 is fixed by the fixing mechanism 8, so that the impeller 6 in the grit tank 1 is adjustable, and the position of the impeller 6 can be adjusted according to the different grit treatment requirements of the grit tank 1. It has strong flexibility and the use of the impeller 6 is not limited, so that the separation effect of organic matter and sand particles is optimized, the effect of the vortex in the grit tank 1 is greatly increased, and the effect of separating sand particles from organic matter and water can be better.

[0049] In this embodiment, preferably, please refer to Figure 2-4 and Figure 6-8 The outer wall of the rotating shaft 5 is slidably sleeved with a collar 9, and a plurality of impellers 6 are evenly arranged on the collar 9. The inner wall of the collar 9 is provided with a plurality of fixing holes 10. The impeller 6 is arranged on the collar 9, and the collar 9 drives the plurality of impellers 6 to slide up and down along the rotating shaft 5 to adjust their positions.

[0050] In this embodiment, preferably, please refer to Figure 4 and Figure 6-8 A transmission chamber 11 is provided inside the rotating shaft 5, and the fixing mechanism 8 includes: a telescopic member 81, which is arranged on the inner wall of the transmission chamber 11, and a moving rod 82 is provided at the telescopic end of the telescopic member 81. The telescopic member 81 in the present application adopts an electric telescopic rod; a plurality of block groups, which are evenly arranged at different heights on the rotating shaft 5, and each block group includes a plurality of fixed blocks 83 that are movable and penetrate the outer wall of the rotating shaft 5, and are adapted to the fixing holes 10; a plurality of connecting rods 84, one end of which is hinged to each fixed block 83, and the other end is hinged to the rotating shaft 5.

[0051] The telescopic member 81 drives the moving rod 82 to retract. Figure 6For example, when the moving rod 82 moves upward, the moving rod 82 will cooperate with multiple connecting rods 84 at the same time, so that multiple fixed blocks 83 move horizontally synchronously, and finally the fixed block 83 is separated from the fixing hole 10 of the collar 9. When the collar 9 is no longer restricted by the fixing block 83, the collar 9 can slide up and down along the outer wall of the rotating shaft 5. At this time, the height position of the collar 9 and the impeller 6 can be adjusted, which is flexible and can be adjusted as needed. After the adjustment is completed, the collar 9 is at the position of the adjusted fixing block 83, and then the moving rod 82 is extended by the telescopic member 81, that is, the moving rod 82 moves downward, and the moving rod 82 moves downward and cooperates with multiple connecting rods 84 at the same time, so that multiple fixed blocks 83 move horizontally synchronously. At this time, the fixed block 83 moves toward the outside of the rotating shaft 5, and the fixing block 83 at the collar 9 will eventually enter the fixing hole 10 of the collar 9, thereby restricting and fixing the collar 9 and the impeller 6, and ensuring the subsequent use effect of the impeller 6.

[0052] The force of the moving rod 82 and the connecting rod 84 driving the fixed block 83 in the horizontal direction is greater than the force in other directions on the fixed block 83, so as to ensure that the fixed block 83 can move horizontally smoothly, and the fixed block 83 only needs to move a short distance.

[0053] In this embodiment, preferably, please refer to Figure 2-3 The driving mechanism 7 includes a first driving member 71 disposed on the supporting plate 4, a gear 72 is disposed at the output end of the first driving member 71, and a gear ring 73 meshing with the gear 72 is disposed on the outer wall of the rotating shaft 5. The first driving member 71 in the present application adopts a servo motor, and the first driving member 71 drives the gear 72 to rotate, and the gear 72 drives the gear ring 73 and the rotating shaft 5 to rotate, that is, the impeller 6 rotates, so that the sewage slurry flows in a spiral shape.

[0054] In this embodiment, preferably, please refer to Figure 4 and Figure 6-7The outer wall of the collar 9 is provided with a plurality of mounting blocks 12, a slot 13 is provided in the mounting block 12, a through hole 14 is provided on the mounting block 12, and a plug plate 15 matching the slot 13 is provided on the impeller 6, and a mounting hole 16 matching the through hole 14 is provided on the plug plate 15. By inserting the plug plate 15 on the impeller 6 into the through hole 14 of the mounting block 12, and then inserting the bolts into the through hole 14 and the mounting hole 16 respectively, and then fixing them with nuts, the plug plate 15 and the impeller 6 can be fixed on the mounting block 12, that is, the installation of the impeller 6 is realized. When the impeller 6 is disassembled, the operation is simple, and the impeller 6 can be disassembled and installed, thereby avoiding the current form that the impeller 6 is fixed on the rotating shaft 5, and it is convenient to carry out subsequent maintenance and replacement of the impeller 6, without the need to use other tools for violent cutting, dismantling and welding installation, etc., which saves time and labor while also reducing damage to the rotating shaft 5 and the impeller 6. At the same time, the impeller 6 of different specifications can be replaced for use according to different needs, so as to be adjusted under different occasions and processing requirements, and the practicability is strong.

[0055] In this embodiment, preferably, please refer to Figure 1-4 and Figure 6-7 , further comprising a top plate 17 disposed at the end of the rotating shaft 5, a through cavity 18 being provided in the rotating shaft 5, a through hole 19 being provided on the top plate 17 and communicating with the through cavity 18, and a lifting component 20 for driving the collar 9 to move up and down being provided on the top plate 17. When the fixing mechanism 8 is released from fixing the impeller 6, the collar 9 can be driven up and down by the lifting component 20, and the impeller 6 can be driven up and down to adjust its position, so that the impeller 6 can be conveniently adjusted without the need for manual operation or the use of other tools by the staff. Since the weight of the impeller 6 is also relatively heavy, it can be greatly facilitated to operate and use, saving a lot of labor and time, and having high work efficiency. When adjusting the position of the impeller 6, the impeller 6 can be driven up and down by the lifting component 20, and the operation is simple and convenient. And when the impeller 6 needs to be inspected or replaced, the impeller 6 can be raised to the highest point by the lifting component 20. At this time, the staff can operate it from the top of the grit chamber 1 without entering the interior of the grit chamber 1 for operation, avoiding the situation of difficult entry and exit and difficult operation, saving time and effort, and improving work efficiency.

[0056] In this embodiment, preferably, please refer to Figure 3-4 and Figure 6-7The lifting component 20 includes two support plates 201 arranged on the top plate 17, a rotating rod 202 is rotatably arranged between the two support plates 201, and a second driving member 203 connected to the rotating rod 202 is arranged on the support plate 201. The second driving member 203 in the present application adopts a servo motor, and a rope wheel 204 is arranged on the outer wall of the rotating rod 202, and a first traction rope 205 is wound on the rope wheel 204. A plurality of second traction ropes 206 are arranged on the movable end of the first traction rope 205, and the other end of the second traction rope 206 is connected to the ring 9. The rotating rod 202 and the rope winding wheel 204 are driven to rotate by the second driving member 203. When the rope winding wheel 204 rotates, the rope winding wheel 204 will tighten or loosen the first traction rope 205. When the ring 9 and the impeller 6 are driven to rise, the rope winding wheel 204 will tighten and wind the first traction rope 205. The first traction rope 205 will pull the second traction rope 206. The second traction rope 206 will drive the ring 9 and the impeller 6 to rise along the rotating shaft 5; and when the rope winding wheel 204 loosens the first traction rope 205, the ring 9 and the impeller 6 will move downward due to the gravity, thereby realizing the up and down movement operation of the ring 9 and the impeller 6.

[0057] In this embodiment, preferably, please refer to Figure 7 and Fig. 9 The outer wall of the rotating shaft 5 is provided with a plurality of brackets 21, and a steering wheel 22 is rotatably provided on the bracket 21 for steering the second traction rope 206. By providing the steering wheel 22, the second traction rope 206 can slide along the steering wheel 22, which can reduce the friction of the second traction rope 206, improve its service life, and also ensure the smooth movement of the second traction rope 206.

[0058] In this embodiment, preferably, please refer to Figure 1-2 , Figure 5 and Fig.10 , a grille net 23 is arranged in the outlet pipe 3, an installation opening 24 is provided at the position of the outlet pipe 3 corresponding to the grille net 23, a cover plate 25 is hinged at the installation opening 24, and a limiting component 26 for limiting the grille net 23 is arranged in the installation opening 24. When the grille net 23 sinks to the bottom under the action of gravity, the lighter organic matter is separated from the sand and discharged from the outlet pipe 3 with the water flow, the floating objects such as leaves on the water flow will be blocked by the grille net 23 in the outlet pipe 3, so that the floating objects such as leaves can be prevented from flowing out with the water, and the floating objects can be filtered, thereby improving the subsequent treatment effect of the water flow and improving the practicality of the device.

[0059] When installing the grille net 23, the cover plate 25 is opened, and the grille net 23 is placed into the water outlet pipe 3 through the installation opening 24. Then, the grille net 23 is restricted by the restriction component 26 to ensure its stability during use. Then, the cover plate 25 is closed and fixed before use. After using for a period of time, the cover plate 25 can be opened, and the restriction of the restriction component 26 on the grille net 23 can be released. Then, the grille net 23 can be taken out from the water outlet pipe 3, and the grille net 23 can be cleaned or replaced, so that the treatment of the grille net 23 is convenient and fast, saving time and effort, and improving the use performance of the device.

[0060] In this embodiment, preferably, please refer to Figure 5 and Fig.10 The limiting component 26 includes: a sunken groove 261, which is opened on the side wall of the installation port 24, and a limiting block 262 is slidably provided in the sunken groove 261; an elastic member 263, one end of which is connected to the limiting block 262, and the other end is connected to the inner wall of the sunken groove 261. The elastic member 263 in this application adopts a spring. The inner wall of the water outlet pipe 3 is provided with a plurality of blocks 27, and the blocks 27 are located on both sides of the grille net 23. When the grille net 23 is placed into the water outlet pipe 3 through the installation opening 24, the grille net 23 will squeeze the limiting block 262, and the limiting block 262 will enter the recessed groove 261 and compress the elastic member 263. When the grille net 23 completely enters the water outlet pipe 3, the limiting block 262 is no longer subjected to pressure, and the rebound force of the recessed groove 261 will drive the limiting block 262 to move out of the recessed groove 261. Finally, the limiting block 262 will be above the grille net 23. The grille net 23 can be restricted by the limiting block 262, and the bottom side of the grille net 23 will be restricted by the blocking block 27 to ensure the stability of the grille net 23.

[0061] This application can also use the filter press tail water reuse system:

[0062] In the process of mud treatment in this environmental dredging project, a large amount of alkaline agents will be added to the homogenization tank to react with sewage. When the mud is subsequently filtered by a filter press, the filter press mainly performs solid-liquid separation. The tail water produced by the filter press will also contain soluble alkaline substances that have not reacted completely in the homogenization tank, that is, the effect of alkaline agents. Therefore, the tail water produced by the filter press can be collected and stored, and then the collected tail water can be discharged into the regulating tank. The alkaline substances in these tail waters can be combined with the fine particles in the mud in the regulating tank to form flocculent precipitation. After adding this recycled tail water to the regulating tank, the precipitation of particles in the mud can be accelerated, thereby improving the treatment effect of sewage. The amount of tail water added to the filter press can be controlled by the front-end mud volume to ensure that the concentration of the agent in the mud regulating tank is within a reasonable range, and the precipitation effect and subsequent treatment effect are guaranteed.

[0063] It should be understood that the examples and implementation modes described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on the examples and implementation modes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0064] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0065] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A sludge pre-sedimentation device for environmental dredging, comprising a sand settling tank (1), characterized in that: Also includes: The water inlet pipe (2) and the water outlet pipe (3) are both arranged on the grit chamber (1) and communicate with the interior thereof; A support plate (4) is arranged on the top of the grit chamber (1); a rotating shaft (5) is rotatably arranged on the support plate (4) via a bearing; and a plurality of impellers (6) with adjustable heights are arranged on the rotating shaft (5); A driving mechanism (7), disposed on the supporting plate (4), and used for driving the rotating shaft (5) to rotate; A fixing mechanism (8) is provided on the rotating shaft (5) and is used to restrict and fix the impeller (6) adjusted to different heights.

2. The sludge pre-sedimentation device for environmental dredging according to claim 1, characterized in that: The outer wall of the rotating shaft (5) is slidably sleeved with a collar (9), a plurality of impellers (6) are evenly arranged on the collar (9), and a plurality of fixing holes (10) are opened on the inner wall of the collar (9).

3. The sludge pre-sedimentation device for environmental dredging according to claim 2, characterized in that: A transmission chamber (11) is provided inside the rotating shaft (5), and the fixing mechanism (8) comprises: A telescopic member (81) is arranged on the inner wall of the transmission chamber (11), and a moving rod (82) is arranged at the telescopic end of the telescopic member (81); A plurality of block groups are arranged at different heights on the rotating shaft (5), each of the block groups comprising a plurality of fixed blocks (83) that movably penetrate the outer wall of the rotating shaft (5) and are adapted to the fixed holes (10); A plurality of connecting rods (84) have one end hinged to each of the fixing blocks (83) and the other end hinged to the rotating shaft (5).

4. The sludge pre-sedimentation device for environmental dredging according to claim 1, characterized in that: The driving mechanism (7) comprises a first driving member (71) arranged on the supporting plate (4), the output end of the first driving member (71) is provided with a gear (72), and the outer wall of the rotating shaft (5) is provided with a gear ring (73) meshing with the gear (72).

5. The sludge pre-sedimentation device for environmental dredging according to claim 2, characterized in that: The outer wall of the collar (9) is provided with a plurality of mounting blocks (12), a slot (13) is provided in the mounting block (12), a through hole (14) is provided on the mounting block (12), an insert plate (15) matched with the slot (13) is provided on the impeller (6), and a mounting hole (16) matched with the through hole (14) is provided on the insert plate (15).

6. The sludge pre-sedimentation device for environmental dredging according to claim 2, characterized in that: The invention also comprises a top plate (17) arranged at the end of the rotating shaft (5), a through cavity (18) being provided in the rotating shaft (5), a through hole (19) being provided on the top plate (17) and communicating with the through cavity (18), and a lifting component (20) being provided on the top plate (17) for driving the sleeve ring (9) to move up and down.

7. The sludge pre-sedimentation device for environmental dredging according to claim 6, characterized in that: The lifting component (20) comprises two support plates (201) arranged on the top plate (17), a rotating rod (202) is rotatably arranged between the two support plates (201), a second driving member (203) drivingly connected to the rotating rod (202) is arranged on the support plate (201), a rope winding wheel (204) is arranged on the outer wall of the rotating rod (202), a first traction rope (205) is wound around the rope winding wheel (204), a plurality of second traction ropes (206) are arranged at the movable end of the first traction rope (205), and the other end of the second traction rope (206) is connected to the ring (9).

8. The sludge pre-sedimentation device for environmental dredging according to claim 6, characterized in that: The outer wall of the rotating shaft (5) is provided with a plurality of brackets (21), and the brackets (21) are rotatably provided with steering wheels (22) for steering the second traction rope (206).

9. The sludge pre-sedimentation device for environmental dredging according to claim 1, characterized in that: A grille net (23) is arranged in the water outlet pipe (3), a mounting opening (24) is provided in the water outlet pipe (3) at a position corresponding to the grille net (23), a cover plate (25) is hingedly connected to the mounting opening (24), and a limiting component (26) for limiting the grille net (23) is arranged in the mounting opening (24).

10. The sludge pre-sedimentation device for environmental dredging according to claim 9, characterized in that: The limiting component (26) comprises: An inwardly sunken groove (261) is provided on the side wall of the installation opening (24), and a limiting block (262) is slidably provided in the inwardly sunken groove (261); The elastic member (263) has one end connected to the limiting block (262) and the other end connected to the inner wall of the sunken groove (261).

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