A hydraulic engineering sludge wastewater treatment device

Abstract

The application relates to the technical field of sludge wastewater treatment, and discloses a water conservancy project sludge wastewater treatment device, which comprises a moving piece arranged on the inner wall of a flow guide cover. The cross section of the moving piece is in the shape of an arrowhead. The single-end end of the moving piece is a front end, and the double-end end is a rear end. The deflection direction of the moving piece from the front end to the rear end is the same as the rotating direction of a vane wheel mechanism, so that the outer wall of the moving piece forms a guide wall surface for guiding the sand-containing water flow to the direction away from the inner wall of the flow guide cover. When the moving member is in the rear state, if the vane wheel mechanism rotates forward at high speed, the water flow carrying the sand particles moves outward and contacts the outer wall of the moving piece, and then moves along the wall surface of the moving piece, so as to move in the direction away from the inner wall of the flow guide cover, thereby optimizing the water flow state, reducing the impact speed and angle of the sand particles, improving the impact influence on the flow guide cover, enhancing the protection effect on the flow guide cover, and prolonging the service life of the flow guide cover.

Description

Technical Field

[0001] This application relates to the field of sludge wastewater treatment technology, and in particular to a sludge wastewater treatment device for water conservancy projects. Background Technology

[0002] Water conservancy projects are systematic engineering projects constructed to control and regulate surface water and groundwater to achieve the goals of eliminating harm and promoting benefits. In water conservancy facilities such as canals and rivers, with the increase of years of operation and the influence of natural environmental factors, water bodies inevitably carry silt and impurities, which are deposited in large quantities at the bottom to form silt. The continuous accumulation of this silt not only reduces the cross-sectional area of ​​the canals and rivers and reduces the water conveyance capacity, but the accumulated organic matter and nutrients can also easily lead to eutrophication of the water bodies, affecting water quality and ecological security. Therefore, it is necessary to regularly clean and treat the silt and wastewater in water conservancy projects.

[0003] The existing sludge wastewater treatment has formed a relatively complete process flow, which includes a conveying system for lifting sludge to the treatment area, a sludge pretreatment and impurity removal system, a sludge homogenization and quantity adjustment system, a filter press system for solid-liquid separation, a sedimentation system for deep impurity removal, and a sludge cake recovery system, thereby realizing integrated and continuous operation.

[0004] Submersible mixers are an important device in sludge wastewater treatment processes. They are underwater mixing equipment mainly used in balancing tanks, biological treatment tanks, and other similar environments. During operation, a submersible motor drives an impeller to rotate at high speed. The impeller throws water outwards, generating a swirling jet. This high-speed jet uses the shear stress on its surface to move the surrounding still liquid. As the liquid mixes, it forms a controlled volumetric flow (overall flow), thereby achieving large-scale circulation and mixing within the tank, preventing sludge sedimentation and ensuring uniform mixing.

[0005] However, existing submersible mixers still have some drawbacks in use: the external impeller is often equipped with a flow guide, which can constrain the circumferential water flow generated by the impeller rotation and convert it into a more concentrated and powerful axial flow, thereby improving the mixing efficiency and directional driving force. However, the wastewater often contains a large amount of sand particles. When the impeller drives the water flow to rotate, the water flow carries sand particles to impact and continuously scour the inner wall of the flow guide, which can easily lead to a reduction in the thickness and strength of the flow guide, or even cause the flow guide to deform or crack. Summary of the Invention

[0006] This application proposes a sludge wastewater treatment device for water conservancy projects. By setting an auxiliary mechanism between the impeller mechanism and the guide shroud, it has the advantages of effectively optimizing the water flow pattern, reducing the impact speed and angle of sand particles, and enhancing the protective effect of the guide shroud. This solves the problem that water carrying sand particles impacts and continuously scours the inner wall of the guide shroud, resulting in thinning of the guide shroud wall, decrease in strength, and even deformation and cracking.

[0007] To achieve the above objectives, this application adopts the following technical solution: a water conservancy project sludge wastewater treatment device, comprising: a power mechanism, an impeller mechanism disposed in front of the power mechanism and driven to rotate by the power mechanism, a guide shroud sleeved outside the impeller mechanism, and an auxiliary mechanism fixedly connected to the power mechanism and located between the impeller mechanism and the guide shroud;

[0008] The impeller mechanism includes a movable housing and movable blades disposed on the outer wall of the movable housing; the auxiliary mechanism includes a movable component disposed against the inner wall of the guide shroud.

[0009] The cross-section of the moving part is arrow-shaped. The single-headed end of the moving part is the front end, and the double-headed end is the rear end. The deflection direction of the moving part from the front end to the rear end is the same as the rotation direction of the impeller mechanism, so that the outer wall of the moving part forms a guide wall surface that guides the sand-containing water flow away from the inner wall of the guide shroud.

[0010] Furthermore, three movable blades are fixedly connected to the outer wall of the movable housing, and the movable housing drives the movable blades to rotate; when the front end of the movable housing is taken as the viewing angle, the movable housing drives the movable blades to rotate counterclockwise.

[0011] Furthermore, the power mechanism includes a fixed housing located behind the movable housing and movably engaged with the rear end of the movable housing, a sealing member disposed at the front end of the fixed cavity of the fixed housing, a power motor disposed at the rear end of the fixed cavity of the fixed housing, a power shaft connected between the power motor and the movable housing, and a fixed seat fixedly disposed at the top of the rear end of the fixed housing. The front end of the power shaft passes through the sealing member and is fixedly sleeved with the movable housing.

[0012] Furthermore, it also includes a wire module consisting of several wire groups, one end of which is used to connect to the power supply, and the other end passes through the fixing base and is fixedly sleeved in the fixing housing, and one of the wire groups of the wire module is electrically connected to the power wire of the power motor.

[0013] Furthermore, the front end of the fairing is a straight cylinder that wraps around the movable blades, and the rear end of the fairing is a trumpet-shaped cylinder that is narrower at the front and wider at the rear.

[0014] Furthermore, it also includes a connecting mechanism between the power mechanism and the fairing. The connecting mechanism includes a connecting rear ring and a connecting front ring respectively sleeved and fixedly connected to the outer wall of the rear end and the outer wall of the front end of the fixed housing, a connecting steel rod connected between the connecting rear ring and the connecting front ring, and a plurality of connecting shafts arranged around the connecting front ring. The connecting shafts are arranged obliquely, and one end of the connecting shaft is fixedly connected to the front side wall of the connecting front ring, and the other end is fixedly connected to the inner wall of the rear end of the fairing.

[0015] Furthermore, the auxiliary mechanism also includes an annular auxiliary housing, a control component disposed within the auxiliary housing, and a moving component disposed between the impeller mechanism and the guide shroud. The auxiliary housing is located at the junction of the power mechanism and the impeller mechanism, and the auxiliary housing is fixedly connected to the power mechanism by bolts. The moving component is a component of the moving mechanism, and several moving components are arranged around the auxiliary housing. The control component cooperates with the moving components and drives the moving components to move between the front and rear states along the axial direction of the impeller mechanism.

[0016] Furthermore, the auxiliary housing has a short cavity inside the rear end and a long cavity inside the front end. The control component includes a control main board movably sleeved in the short cavity, a control sub-board movably sleeved in the long cavity, and a control wire electrically connected to the control main board.

[0017] The main control board is an electromagnet, and the secondary control board is a permanent magnet. The polarity of the end of the main control board changes with the direction of the current, so as to form a magnetic attraction or repulsion force between the main control board and the secondary control board to drive the moving component to move axially.

[0018] Furthermore, the control subplate is connected to the rear end of the moving part via a movable connecting plate, the movable connecting plate being concave in shape with different heights at both ends;

[0019] The front end of the moving part is connected to a moving plate, which is L-shaped, and the end of the moving plate away from the moving part is movably engaged with the front wall of the guide shroud.

[0020] The movable connecting plate is also connected to a movable block, which is movably fitted with the inner ring of the long cavity of the auxiliary housing.

[0021] Furthermore, the front end of the flow guide is provided with several sets of water passage holes. Each set of water passage holes consists of several horizontally arranged water passage holes, and the central axis of the water passage holes is obliquely set on both the cross-section and the axial section of the water passage holes and has an angle with the radial line of the flow guide.

[0022] The movable component has a set of movable holes, which consists of several horizontally arranged movable holes. The central axis of the movable holes extends in the same direction as the central axis of the water passage holes, and the movable component is connected to each of the set of water passage holes when it is in the rear position.

[0023] Each set of water passage holes is arranged at equal angles along the circumference of the guide shroud. The number of sets of water passage holes on the guide shroud is an integer multiple of the number of sets of moving holes on the moving parts. The central angle between two adjacent sets of water passage holes is a preset angle.

[0024] The impeller mechanism also includes a limiting block fixedly connected to the outer wall of the movable housing and located behind the movable blade. The number of the limiting block and the moving block are the same. When the moving component is in the front position, the moving block and the limiting block are in the same radial cross section.

[0025] The water conservancy project sludge wastewater treatment device also includes a control system. The control system is used to control the impeller mechanism to rotate at a low speed at the preset angle or an integer multiple of the preset angle when the moving component is in the front position, so that the limiting block pushes the moving block and drives the moving component to move along the circumference of the guide shroud to the next stopping position; when the moving component switches to the rear position at the next stopping position, the moving hole and the corresponding water passage hole remain in communication.

[0026] By opening water passage holes on the front wall of the flow guide and setting the water passage holes at an angle, the water flow outside the flow guide is forced into the flow guide through the water passage holes under negative pressure. The external water flow and the internal water flow that exits the inner wall of the flow guide form a cross-flow, thereby enhancing the effect of fluid rotation, mixing and guiding within the flow guide. At the same time, the moving part has a moving hole in the same direction as the water passage hole. When the moving hole and the water passage hole are connected, the external water flow rushes into the rear end of the moving part. Due to the design of the rear end of the moving part, it will exert a reverse pushing force on the sand particles accumulated behind the rear end of the moving part, further causing the sand particles to move away from the inner wall of the flow guide. At the same time, it will exert a forward pushing force on the sand particles, further increasing the rate at which the sand particles are discharged from the moving part and the flow guide, thereby achieving thorough cleaning of the moving part and the flow guide and enhancing the durability of the moving part and the flow guide.

[0027] The beneficial effects of this invention are as follows:

[0028] This application provides a sludge wastewater treatment device for water conservancy projects. An auxiliary mechanism is installed on the power mechanism, located between the impeller mechanism and the guide shroud. The auxiliary mechanism is designed to consist of an auxiliary shell, a control component, and a moving component. The control component can control the horizontal movement of the moving component to change its state. When the moving component is in the rear position, it remains relatively stationary with respect to the guide shroud. If the impeller mechanism rotates at high speed in the forward direction, it drives the water flow inside the guide shroud, carrying sand particles in the same direction. At this time, due to the shape of the moving component... The design incorporates a distribution system where, as water carries sand particles outward, the sand particles contact the outer wall of the moving component and then move along the wall of the moving component, thus moving away from the inner wall of the guide shroud. This optimizes the water flow pattern, reduces the impact speed and angle of the sand particles, thereby improving the impact on the guide shroud, enhancing its protective effect, and extending its service life. When the moving component is in the forward position, the movable shell drives the limiting block to rotate, pushing the moving component relative to the guide shroud, effectively cleaning residual impurities on the guide shroud and further extending its service life. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0030] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0031] Figure 2 This is a front view diagram of the overall structure of this invention;

[0032] Figure 3 This is a rear view diagram of the overall structure of the present invention;

[0033] Figure 4 This is a three-dimensional structural diagram of the overall structure located in the cross-section of the fairing in this invention;

[0034] Figure 5 This is a three-dimensional structural diagram of the entire invention.

[0035] Figure 6 This is a three-dimensional structural diagram of the auxiliary mechanism in this invention;

[0036] Figure 7 This is a three-dimensional structural diagram of the auxiliary mechanism in this invention.

[0037] Figure 8 This is a cross-sectional three-dimensional structural diagram of the entire invention;

[0038] Figure 9 In this invention Figure 8 Enlarged structural diagram at point A;

[0039] Figure 10 This is a three-dimensional structural diagram of the flow guide cover and auxiliary mechanism located at the axial section of the water passage in this invention;

[0040] Figure 11 In this invention Figure 10 Enlarged structural diagram at point B;

[0041] Figure 12 This is a three-dimensional structural diagram of the flow guide cover and auxiliary mechanism located in the cross-section of the water passage in this invention;

[0042] Figure 13 In this invention Figure 12 Enlarged structural diagram at point C.

[0043] In the diagram: 1. Power mechanism; 11. Fixed housing; 12. Sealing component; 13. Power motor; 14. Power shaft; 15. Fixed base; 2. Wire module; 3. Impeller mechanism; 31. Movable housing; 32. Movable blades; 4. Connecting mechanism; 41. Rear connecting ring; 42. Front connecting ring; 43. Connecting steel rod; 44. Connecting shaft; 5. Flow guide; 6. Auxiliary mechanism; 61. Auxiliary housing; 7. Control component; 71. Control main board; 72. Control sub-board; 73. Control wire; 8. Moving component; 81. Moving connecting plate; 82. Moving part; 83. Moving clamp; 84. Moving block; 9. Limit block. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1: A device for treating sludge and wastewater in water conservancy projects, namely a submersible mixer, includes a power mechanism 1, a wiring module 2, an impeller mechanism 3, a connecting mechanism 4, a flow guide shroud 5, and an auxiliary mechanism 6, specifically:

[0046] like Figures 1-3 The power mechanism 1 provides rotational power, and an impeller mechanism 3 is provided in front of the power mechanism 1. The impeller mechanism 3 is used to agitate the water flow and achieve uniform mixing. The impeller mechanism 3 includes a movable housing 31 and movable blades 32, such as... Figures 4-5Three movable blades 32 are fixedly connected to the outer wall of the movable housing 31. The movable housing 31 drives the movable blades 32 to rotate in the forward direction. Taking the front end of the movable housing 31 as the observation angle, the movable housing 31 drives the movable blades 32 to rotate counterclockwise. Taking the rear end of the movable housing 31 as the observation angle, the movable housing 31 drives the movable blades 32 to rotate clockwise. At this time, the movable blades 32 throw water outward and make the water flow carrying sand particles rotate in the same direction until it hits the inner wall of the guide shroud 5. At the same time, the movable blades 32 throw water forward, thereby pushing the water flow to be completely discharged from its front end. That is, the front end of the movable housing 31 is the water outlet direction.

[0047] like Figures 4-5 The power mechanism 1 includes a fixed housing 11, a sealing component 12, a power motor 13, a power shaft 14, a fixed seat 15, and a guide wheel. The fixed housing 11 is located behind the movable housing 31, and the front end of the fixed housing 11 is movably engaged with the rear end of the movable housing 31 to reduce the probability of sand particles entering between them. The fixed housing 11 has a fixed cavity inside, and the front end of the fixed cavity of the fixed housing 11 is provided with a sealing component 12 to further reduce the probability of sand particles entering the fixed housing 11. The power motor 13 is provided at the rear end of the fixed cavity of the fixed housing 11. The rear end of the power shaft 14 is movably connected to the front end of the power motor 13. The front end of the power shaft 14 passes through the sealing component 12 and is fixedly sleeved inside the movable housing 31. When the power motor 13 is working, it can drive the power shaft 14 to rotate, thereby driving the movable housing 31 and the movable blade 32 to rotate synchronously.

[0048] like Figures 4-5 A fixing seat 15 is fixedly installed at the top rear end of the fixed housing 11. The wire module 2 is composed of several wire groups. One end of the wire module 2 is connected to the power supply, and the other end of the wire module 2 passes through the fixing seat 15 and is fixedly sleeved inside the fixed housing 11. One of the wire groups of the wire module 2 is electrically connected to the power wire of the power motor 13, thereby providing a power source for the operation of the power motor 13.

[0049] A set of symmetrically arranged guide wheels is fixedly connected to the rear end of the fixed housing 11, and the guide wheels are movably engaged with the guide rod. The guide rod serves as a track and is vertically fixed to the bottom of the pool, thereby providing a path for the submersible mixer to move up and down. The lifting device is vertically fixed to the ground and is connected to the submersible mixer through a steel wire rope, thereby providing a power source for the submersible mixer to move up and down. The submersible mixer is placed horizontally in the pool, and it achieves vertical lifting by cooperating with the guide rod and the lifting device.

[0050] like Figures 4-5A connecting mechanism 4 is fixedly installed on the power mechanism 1 to realize the vertical lifting of the submersible mixer. The connecting mechanism 4 includes a rear connecting ring 41, a front connecting ring 42, and a connecting steel rod 43. The rear connecting ring 41 is movably sleeved on the outer wall of the rear end of the fixed housing 11 and is fixedly connected to the fixed housing 11 by bolts. The front connecting ring 42 is movably sleeved on the outer wall of the front end of the fixed housing 11 and is fixedly connected to the fixed housing 11 by bolts. The two ends of the connecting steel rod 43 are fixedly engaged with the top end of the rear connecting ring 41 and the top end of the front connecting ring 42, respectively, and the middle part of the connecting steel rod 43 is fixedly connected to the lifting device by a steel wire rope.

[0051] like Figures 4-5 The connecting mechanism 4 also includes a connecting shaft 44. There are several connecting shafts 44, and the several connecting shafts 44 are evenly arranged around the connecting front ring 42. The connecting shafts 44 are arranged at an angle, and one end of the connecting shaft 44 is fixedly connected to the front side wall of the connecting front ring 42. The other end of the connecting shaft 44 is fixedly connected to the rear inner wall of the guide shroud 5. The connecting shafts 44 are used to achieve a stable connection to the guide shroud 5 and keep the guide shroud 5 coaxial with the power mechanism 1 and the impeller mechanism 3.

[0052] like Figures 4-5 The guide shroud 5 is movably fitted onto the outside of the impeller mechanism 3 to guide and concentrate the water flow. The front end of the guide shroud 5 is a straight cylinder, and the front end of the guide shroud 5 wraps around the movable blades 32, which is the main channel for water flow. The rear end of the guide shroud 5 is a trumpet-shaped cylinder, which is narrow at the front and wide at the back, and can collect more water. In summary, the design of the guide shroud 5 not only guides the water flow from the large diameter to the small diameter, effectively increasing the axial velocity of the water flow ejected from the front end of the guide shroud 5, making it a stronger and more concentrated jet, but also effectively constrains and organizes the turbulent water flow generated by the rotation of the impeller mechanism 3, forcibly transforming the originally dispersed and tangential water flow into an axial flow with the same direction, reducing the disordered dissipation of energy, and thus extending the effective action distance of the water flow, achieving mixing and stirring over a longer distance.

[0053] like Figures 4-7An auxiliary mechanism 6 is fixedly connected to the power mechanism 1, and the auxiliary mechanism 6 is located between the impeller mechanism 3 and the guide shroud 5. It is used to enhance the protection effect of the guide shroud 5. The auxiliary mechanism 6 includes an auxiliary housing 61, a regulating component 7, and a moving component 8. The auxiliary housing 61 is annular and located at the junction of the fixed housing 11 and the movable housing 31. The auxiliary housing 61 is fixedly connected to the fixed housing 11 by bolts, which can enhance the sealing effect between the fixed housing 11 and the movable housing 31, reduce the possibility of sand particles entering between the fixed housing 11 and the movable housing 31, and extend the service life of both. The regulating component 7 is provided inside the auxiliary housing, which is a key component for controlling the movement of the moving component 8. The moving component 8 is located between the impeller mechanism 3 and the guide shroud 5 and is a key component for protecting the guide shroud 5. There are several moving components 8, and several moving components 8 are evenly arranged around the auxiliary housing 61.

[0054] like Figures 1-3 The moving component 8 includes a moving part 82, and the outer wall of the moving part 82 is in contact with the inner wall of the guide shroud 5. The cross-sectional shape of the moving part 82 is arrow-shaped, with a single end being the front end and a double end being the rear end. The deflection direction of the moving part 82 from the front end to the rear end is the same as the rotation direction of the impeller mechanism 3. The number of moving parts 82 is set according to the size of the guide shroud 5, so that the moving parts 82 are evenly laid on the inner wall of the guide shroud 5. One-third of the inner wall of the guide shroud 5 is covered by the moving parts 82. When the impeller mechanism 3 rotates at high speed, the water flow carries sand particles and rotates in the same direction as the impeller mechanism 3, impacting the inner wall of the guide shroud 5. During this process, some of the water flow impacting the guide shroud 5 will come into contact with the moving part 82 and move along the outer wall of the moving part 82 from its front end to its rear end. Because the front end of the moving part 82 forms an angle with the inner wall of the guide shroud 5, the water flow moves along the outer wall of the moving part 82 and away from the guide shroud 5.

[0055] In summary, by utilizing the shape and distribution design of the movable component 82, when the water flow carrying sand particles is about to impact the inner wall of the guide shield 5, the sand particles come into contact with the outer wall of the movable component 82, and then move along the wall surface of the movable component 82, thereby moving away from the inner wall of the guide shield 5. This effectively optimizes the water flow pattern, reduces the impact speed and angle of the sand particles, thereby improving the impact on the guide shield 5, enhancing the protection effect of the guide shield 5, and extending the service life of the guide shield 5.

[0056] Example 2, based on Example 1, such as Figures 6-9The control component 7 includes a control main board 71, a control sub-board 72, and a control wire 73. The auxiliary housing 61 has a short cavity inside its rear end, and the auxiliary housing 61 is movably connected to the control main board 71 through the short cavity. The auxiliary housing 61 has a long cavity inside its front end, and the auxiliary housing 61 is movably connected to the control sub-board 72 through the long cavity. One end of the control wire 73 is electrically connected to the control main board 71, and the other end of the control wire 73 passes through the auxiliary housing 61 and is fixedly connected to the fixed housing 11. This end of the control wire 73 is electrically connected to one of the wire groups of the wire module 2. The control wire 73 is used to supply power to the control main board 71, so that the control main board 71 generates a magnetic field that interacts with the control sub-board 72.

[0057] For the main control board 71 and the secondary control board 72, both are designed as rings, with identical shapes and coaxial arrangement. The main control board 71 employs a toroidal solenoid winding, meaning that coils are uniformly and tightly wound around its surface along the circumference. This generates an axially distributed magnetic field, causing one end of the main control board 71 to have a north pole (N pole) and the other end to have a south pole (S pole). This results in the strongest axial interaction between the main control board 71 and the coaxially mounted secondary control board 72. In other words, the main control board 71 is an electromagnet, and the secondary control board 72 is a permanent magnet. The polarity of the main control board 71 changes when the direction of the current changes, thus achieving control. The switching of magnetic attraction and repulsion of the sub-board 72 is as follows: When a positive current is applied, the polarity of the end face of the main control board 71 closest to the sub-board 72 is opposite to the polarity of the opposite end face of the sub-board 72, and there is a magnetic attraction between them. At this time, the sub-board 72 will move closer to the main control board 71. When a reverse current is applied, the polarities of the two end faces of the main control board 71 are reversed, and the polarity of the end face of the main control board 71 closest to the sub-board 72 is the same as the polarity of the opposite end face of the sub-board 72, and there is a magnetic repulsion between them. At this time, the sub-board 72 will move away from the main control board 71, so that the control component 7 can provide power for the horizontal movement of the moving component 8.

[0058] The short cavity of the auxiliary housing 61 is a sealed cavity, and the auxiliary housing 61 remains stationary relative to the fixed housing 11, which can effectively waterproof and seal the control main board 71 to isolate it from the external water environment. In addition, to improve the sealing performance of the environment in which the control main board 71 is located, a sealing ring can be installed at the junction of the auxiliary housing 61 and the control wire 73 for dynamic sealing. The short cavity can be filled with insulating oil or waterproof medium to improve the waterproof, corrosion-resistant and pressure-resistant performance of the control main board.

[0059] The long cavity of the auxiliary housing 61 is an open cavity, and the control plate 72 is movably engaged in the long cavity. The movement stroke of the control plate 72 is the length in the direction of the long cavity axis, that is, the control plate 72 moves horizontally in the axial direction. Since the control plate 72 is rigidly connected to the moving component 8, it can effectively output motion and thrust. In addition, in order to ensure that the control plate 72 can move horizontally along the long cavity axis stably and controllably, a protective sleeve made of non-magnetic material (such as copper or stainless steel) can be installed on the outside of the control plate 72. The protective sleeve can then slide precisely with the wall of the long cavity. To reduce friction, ball bearings can be installed on the outside of the protective sleeve to change sliding friction into rolling friction, thereby improving the smoothness of movement and response speed.

[0060] It should be noted that after the main control board 71 is powered on, it generates a magnetic attraction or repulsion force on the secondary control board 72 along the axis of the moving member 8. The magnetic attraction or repulsion force is greater than the axial movement resistance experienced by the moving member 8 when switching between the front and rear states. The axial movement resistance includes the frictional resistance generated at the joint between the moving member 8 and the guide shroud 5 and the auxiliary housing 61, as well as the load resistance of the water flow acting on the moving member 8, thereby enabling the secondary control board 72 to drive the moving member 8 to move axially.

[0061] In addition, if precise control of the axial position of the control plate 72 is required, a displacement sensor can be installed at the end of the moving component 8 connected to the control plate 72. The displacement sensor is used to detect the axial position of the control plate 72 or the moving component 8 in the long cavity of the auxiliary housing 61 and feeds back the detected axial position signal to the controller. The controller determines whether the moving component 8 has reached the forward or backward state based on the axial position signal. When the moving component 8 is detected to have reached the backward state, the controller controls the impeller mechanism 3 to enter the high-speed stirring mode. When the moving component 8 is detected to have reached the forward state, the controller controls the impeller mechanism 3 to enter the low-speed switching or cleaning mode.

[0062] like Figures 6-9The movable component 8 also includes a movable connecting plate 81 and a movable locking plate 83. The movable connecting plate 81 is concave at both ends with different heights, and one end of the movable connecting plate 81 is fixedly connected to the wall of the regulating sub-plate 72, while the other end of the movable connecting plate 81 is fixedly connected to the rear wall of the movable component 82. The movable connecting plate 81 ensures that it is always stably engaged with the auxiliary housing 61 and will not detach from the auxiliary housing 61 due to horizontal movement. The movable locking plate 83 is L-shaped, and one end of the movable locking plate 83 is movably engaged with the front wall of the guide shroud 5, while the other end of the movable locking plate 83 is engaged with the rear wall of the movable component 82. The front wall is fixedly connected, and the movable plate 83 ensures that it is always stably engaged with the flow guide 5 and will not detach from the flow guide 5 due to horizontal movement, thereby ensuring the stability of the moving part and the flow guide 5. When the main control board 71 is supplied with a positive current and generates a magnetic attraction force with the control sub-board 72, the moving part 8 is driven to change from the front position to the rear position. When the main control board 71 is supplied with a reverse current and generates a magnetic repulsion force with the control sub-board 72, the moving part 8 is driven to change from the rear position to the front position. The moving part 8 can perform different functions in different states.

[0063] Example 3, based on Example 2, such as Figures 10-13 The front end of the flow guide shroud 5 is provided with several sets of water passage holes, and several horizontally arranged water passage holes form a set. The central axis of the water passage holes is set obliquely on both the cross-section and the axial section of the water passage holes and has an angle with the radial line of the flow guide shroud 5. Thus, when the water flow outside the flow guide shroud 5 is subjected to negative pressure and enters through the water passage holes, the external water flow and the internal water flow discharged into the inner wall of the flow guide shroud 5 form an intersecting state, thereby strengthening the effect of fluid rotation, mixing and guiding inside the flow guide shroud 5.

[0064] like Figures 10-13 The movable component 82 has a set of movable holes, and several horizontally arranged movable holes form a set. The angle design of the movable holes is the same as that of the water passage holes. When the movable component 82 is in the rear position, a set of movable holes is connected to a set of water passage holes one by one. Because the water flow contains small-diameter sand particles and large-diameter sand particles, under the restriction of the movable component 82, the small-diameter sand particles will move synchronously with the water flow, thus moving away from the guide shroud 5 under the action of the outer wall of the movable component 82. The large-diameter sand particles are not easy to move synchronously with the water flow due to inertia, and they may adhere to the inner wall of the guide shroud 5 located between the two movable components 82. The sand particles accumulate behind the rear end of one of the moving parts 82. When external water flows into the rear end of the moving part 82, the design of the rear end of the moving part 82 will exert a reverse pushing force on the large-diameter sand particles accumulated behind the rear end of the moving part 82, further causing the large-diameter sand particles to move away from the inner wall of the guide shroud 5. At the same time, it will exert a forward pushing force on the large-diameter sand particles, further increasing the rate at which the sand particles are discharged from the moving part 82 and the guide shroud 5, thereby achieving thorough cleaning of the moving part 82 and the guide shroud 5 and enhancing the durability of the moving part 82 and the guide shroud 5.

[0065] like Figures 10-13 The number of water passage hole groups is an integer multiple of the number of movable hole groups. Each group of water passage holes is arranged at equal angles along the circumference of the guide shroud 5, and the central angle between two adjacent groups of water passage holes is a preset angle. When the impeller mechanism 3 drives the movable component 8 to move circumferentially, the control system controls the power motor 13 to rotate at low speed, so that the impeller mechanism 3 drives the movable component 8 to rotate through a preset angle or an integer multiple of the preset angle before stopping or braking. Thus, when the impeller mechanism 3 stops, the stopping position of the movable component 8 is different from the previous stopping position. Furthermore, since the circumferential movement angle of the movable component 8 corresponds to the central angle between adjacent groups of water passage holes, the movable hole on the movable component 82 can connect with another group of water passage holes, thereby ensuring the connection between the movable hole and the water passage hole while changing the stopping position of the movable component 8.

[0066] Example 4, based on Example 3, such as Figures 8-9 The movable component 8 includes a movable block 84. One side of the movable block 84 is movably fitted with the inner ring of the long cavity of the auxiliary housing 61, and the other side of the movable block 84 is fixedly connected to the wall of the movable connecting plate 81. This not only further enhances the stability of the movable connecting plate 81, the movable component 82 and the movable clamping plate 83, but also provides conditions for the movable connecting plate 81, the movable component 82 and the movable clamping plate 83 to rotate in cooperation with the limiting block 9.

[0067] like Figures 8-9 The impeller mechanism 3 also includes a limiting block 9. The limiting block 9 is fixedly connected to the outer wall of the movable housing 31 behind the movable blade 32. The number of limiting blocks 9 and moving blocks 84 is the same. When the moving component 8 is in the front position, the moving block 84 and the limiting block 9 are in the same radial cross section. Thus, when the movable housing 31 rotates, the limiting block 9 will fit with the moving block 84, thereby pushing the moving component 82 to move along the inner wall of the guide shroud 5, effectively cleaning the impurities remaining on the guide shroud 5, and further extending the service life of the guide shroud 5.

[0068] When the submersible mixer is working, if the moving component 8 is controlled by the magnetic attraction of the regulating component 7 and changes from the front state to the rear state, that is, the moving connecting plate 81 moves from front to back in the long cavity of the auxiliary housing 61 until the regulating sub-plate 72 touches the rear wall of the long cavity. During this process, the moving component 82 and the moving clamping plate 83 move from front to back along the inner wall of the guide shroud 5 until the moving clamping plate 83 is completely engaged with the guide shroud 5. This helps the moving component 82 to provide a buffer protection function for the guide shroud 5 in the rear state. At the same time, the moving block 84 moves from front to back and gradually disengages from the limiting block 9 until the moving block 84 completely enters the long cavity of the auxiliary housing 61 and completely disengages from the limiting block 9. This helps the moving block 84 to not affect the high-speed operation of the impeller mechanism 3 in the rear state. If the moving component 8 is controlled by the magnetic repulsion of the regulating component 7 and changes from the rear state to the front state, that is, the moving connecting plate 81 moves from back to front in the long cavity of the auxiliary housing 61 until the moving connecting plate 81 abuts against the front wall of the long cavity. During this process, the moving component 82 and the moving locking plate 83 move from back to front along the inner wall of the guide shroud 5 until the moving locking plate 83 just does not disengage from the guide shroud 5. This helps the moving component 82 to maintain relative stability with the guide shroud 5 under the locking action of the moving locking plate 83 in the front state. At the same time, the moving block 84 moves from back to front and gradually begins to contact the limiting block 9 until the moving block 84 disengages from the long cavity of the auxiliary housing 61 and fully contacts the limiting block 9. This helps the moving component 82 to be pushed by the limiting block 9 and move circumferentially along the inner wall of the guide shroud 5.

[0069] The working principle of this invention is as follows:

[0070] Before the impeller mechanism 3 operates, the control component 7 is activated, causing the moving component 8 to be in a rearward position under the action of magnetic attraction. At this time, the moving component 8 and the guide shroud 5 remain relatively stationary. Then, the impeller mechanism 3 starts and rotates at high speed in the forward direction to drive the water flow inside the guide shroud 5, carrying sand particles, to move in the same direction. At this time, utilizing the shape and distribution design of the moving component 82, the sand particles carried by the water flow come into contact with the outer wall of the moving component 82 when impacting the inner wall of the guide shroud 5. Afterward, they will move along the wall surface of the moving component 82, thus moving in a direction away from the inner wall of the guide shroud 5, effectively optimizing the water flow pattern, reducing the impact speed and angle of the sand particles, thereby improving the impact on the guide shroud 5, enhancing the protection effect of the guide shroud 5, and extending the service life of the guide shroud 5. During the process, the water flow outside the guide shroud 5 is forced into the guide shroud 5 through the water passage by the negative pressure inside the guide shroud 5. The external water flow and the internal water flow that exits the inner wall of the guide shroud 5 form an intersecting pattern, which can enhance the effect of fluid rotation, mixing and guiding inside the guide shroud 5. At the same time, because the water passage is connected to the moving hole, some of the external water flow rushes into the rear end of the moving part 82. This exerts a reverse pushing force on the sand particles located behind the rear end of the moving part 82, further causing the sand particles to move away from the inner wall of the guide shroud 5. It also exerts a forward pushing force on the sand particles, further increasing the rate at which the sand particles are discharged from the moving part 82 and the guide shroud 5, so as to clean the moving part 82 and the guide shroud 5 and enhance the durability of the moving part 82 and the guide shroud 5.

[0071] Before cleaning the guide shroud 5, the impeller mechanism 3 stops rotating at high speed. Then, the control component 7 changes the direction of the current, so that the moving component 8 is in the forward position under the action of magnetic repulsion. Then, the impeller mechanism 3 starts to rotate in the forward direction at low speed, so that the limit block 9 gradually rotates to fit with the moving block 84, and then drives the moving component 8 to rotate. At this time, the moving component 8 and the guide shroud 5 keep relative to each other, thereby effectively cleaning the impurities remaining on the guide shroud 5 and further extending the service life of the guide shroud 5.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for treating sludge and wastewater from water conservancy projects, characterized in that, include: The power mechanism (1), the impeller mechanism (3) located in front of the power mechanism (1) and driven to rotate by the power mechanism (1), the guide shroud (5) sleeved on the outside of the impeller mechanism (3), and the auxiliary mechanism (6) fixedly connected to the power mechanism (1) and located between the impeller mechanism (3) and the guide shroud (5). The impeller mechanism (3) includes a movable housing (31) and movable blades (32) disposed on the outer wall of the movable housing (31). The auxiliary mechanism (6) includes a movable component (82) disposed against the inner wall of the guide shroud (5). The cross-section of the moving part (82) is arrow-shaped. The single end of the moving part (82) is the front end and the double end is the rear end. The deflection direction of the moving part (82) from the front end to the rear end is the same as the rotation direction of the impeller mechanism (3), so that the outer wall of the moving part (82) forms a guide wall surface that guides the sand-containing water flow away from the inner wall of the guide shroud (5).

2. The sludge and wastewater treatment device for water conservancy projects according to claim 1, characterized in that, The outer wall of the movable housing (31) is fixedly connected with three movable blades (32), and the movable housing (31) drives the movable blades (32) to rotate. When the front end of the movable housing (31) is taken as the viewing angle, the movable housing (31) drives the movable blades (32) to rotate counterclockwise.

3. The sludge and wastewater treatment device for water conservancy projects according to claim 1, characterized in that, The power mechanism (1) includes a fixed housing (11) located behind the movable housing (31) and movably engaged with the rear end of the movable housing (31), a sealing member (12) disposed at the front end of the fixed cavity of the fixed housing (11), a power motor (13) disposed at the rear end of the fixed cavity of the fixed housing (11), a power shaft (14) connected between the power motor (13) and the movable housing (31), and a fixed seat (15) fixedly disposed at the top of the rear end of the fixed housing (11). The front end of the power shaft (14) passes through the sealing member (12) and is fixedly sleeved with the movable housing (31).

4. The sludge and wastewater treatment device for water conservancy projects according to claim 3, characterized in that, It also includes a wire module (2) consisting of several wire groups. One end of the wire module (2) is used to connect to the power source, and the other end passes through the fixing seat (15) and is fixedly sleeved in the fixing housing (11). One of the wire groups of the wire module (2) is electrically connected to the power wire of the power motor (13).

5. The sludge and wastewater treatment device for water conservancy projects according to claim 1, characterized in that, The front end of the fairing (5) is a straight cylinder that wraps around the movable blade (32), and the rear end of the fairing (5) is a trumpet-shaped cylinder that is narrow at the front and wide at the back.

6. The sludge and wastewater treatment device for water conservancy projects according to claim 3, characterized in that, It also includes a connecting mechanism (4) connecting the power mechanism (1) and the fairing (5). The connecting mechanism (4) includes a connecting rear ring (41) and a connecting front ring (42) respectively sleeved and fixedly connected to the outer wall of the rear end and the outer wall of the front end of the fixed housing (11), a connecting steel rod (43) connecting the connecting rear ring (41) and the connecting front ring (42), and a number of connecting shafts (44) arranged around the connecting front ring (42). The connecting shafts (44) are arranged obliquely, and one end of the connecting shaft (44) is fixedly connected to the front side wall of the connecting front ring (42), and the other end is fixedly connected to the inner wall of the rear end of the fairing (5).

7. The sludge and wastewater treatment device for water conservancy projects according to claim 1, characterized in that, The auxiliary mechanism (6) further includes an annular auxiliary housing (61), a control component (7) disposed in the auxiliary housing (61), and a moving component (8) disposed between the impeller mechanism (3) and the guide shroud (5). The auxiliary housing (61) is located at the junction of the power mechanism (1) and the impeller mechanism (3), and the auxiliary housing (61) is fixedly connected to the power mechanism (1) by bolts. The moving component (82) is a component of the moving component (8). Several moving components (8) are arranged around the auxiliary housing (61). The control component (7) cooperates with the moving component (8) and drives the moving component (8) to move between the front and rear states along the axial direction of the impeller mechanism (3).

8. The sludge and wastewater treatment device for water conservancy projects according to claim 7, characterized in that, The auxiliary housing (61) has a short cavity inside the rear end and a long cavity inside the front end. The control component (7) includes a control main board (71) movably sleeved in the short cavity, a control sub-board (72) movably sleeved in the long cavity, and a control wire (73) electrically connected to the control main board (71). The main control board (71) is an electromagnet, and the secondary control board (72) is a permanent magnet. The polarity of the end of the main control board (71) changes with the direction of the current, so as to form a magnetic attraction or magnetic repulsion force between the main control board (71) and the secondary control board (72) to drive the moving component (8) to move axially.

9. The sludge and wastewater treatment device for water conservancy projects according to claim 8, characterized in that, The control subplate (72) is connected to the rear end of the moving part (82) through the moving connecting plate (81), and the moving connecting plate (81) is concave with different heights at both ends; The front end of the movable part (82) is connected to a movable plate (83), which is L-shaped, and the end of the movable plate (83) away from the movable part (82) is movably engaged with the front wall of the guide shroud (5). The movable connecting plate (81) is also connected to a movable block (84), which is in movable contact with the inner ring of the long cavity of the auxiliary housing (61).

10. The sludge and wastewater treatment device for water conservancy projects according to claim 9, characterized in that, The front end of the flow guide (5) is provided with several sets of water passage holes. Each set of water passage holes consists of several horizontally arranged water passage holes. The central axis of the water passage holes is obliquely set on both the cross-section and the axial section of the water passage holes and has an angle with the radial line of the flow guide (5). The movable component (82) is provided with a set of movable holes, which consists of several horizontally arranged movable holes. The central axis of the movable holes extends in the same direction as the central axis of the water passage, and the movable component (8) is in the rear position and is connected to the set of water passages one by one. Each group of water passage holes is arranged at equal angles along the circumference of the guide shroud (5). The number of water passage holes on the guide shroud (5) is an integer multiple of the number of moving holes on the moving part (82). The central angle between two adjacent groups of water passage holes is a preset angle. The impeller mechanism (3) also includes a limiting block (9) fixedly connected to the outer wall of the movable housing (31) and located behind the movable blade (32). The number of the limiting block (9) is the same as that of the moving block (84). When the moving component (8) is in the front position, the moving block (84) and the limiting block (9) are in the same radial cross section. The water conservancy project sludge wastewater treatment device also includes a control system. The control system is used to control the impeller mechanism (3) to rotate at a low speed at the preset angle or an integer multiple of the preset angle when the moving component (8) is in the front position, so that the limiting block (9) pushes the moving block (84) and drives the moving component (8) to move along the circumference of the guide shroud (5) to the next stopping position. When the moving component (8) switches to the rear position at the next stopping position, the moving hole and the corresponding water passage hole remain connected.

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