Municipal water supply and drainage sewage pretreatment device

Abstract

The application discloses a kind of municipal sewage pretreatment device, belongs to municipal drainage treatment technical field, including sand separation tank, the rotary tank is installed at the top of sand separation tank, arc plate is installed in the inner wall of rotary tank;In the application, by being provided with separation assembly in, by the design, when sewage is treated, with sewage entering into rotary tank inside, it can be filtered by first grid and then enter into sand separation tank, at the same time, since the outer wall of fence is circumferentially provided with multiple openings and first grid, and since water flow enters along the side wall of fence, so that the fence can pass through more water flow and facilitate the generation of initial vortex, thereby providing certain rotating force for subsequent rotation, thereby facilitating subsequent sand removal treatment of sewage, and when a certain garbage is accumulated on the surface of first grid, the angle of first grid can be changed to clean it by the impact of water flow on the surface of first grid.

Description

Technical Field

[0001] This invention belongs to the field of municipal drainage treatment technology, and in particular relates to a municipal water supply and drainage sewage pretreatment device. Background Technology

[0002] Municipal drainage involves collecting, transporting, and discharging sewage and rainwater within a city through sewer pipes. In order to reduce the environmental impact of harmful substances in sewage and to reduce urban flooding through a well-constructed drainage system, sewage is no longer discharged directly. Instead, it is pre-treated through various methods to remove garbage, silt, and harmful substances before being discharged, thus protecting the environment.

[0003] During the pretreatment of wastewater, the presence of large solid waste can negatively impact the subsequent treatment of inorganic particles in the grit chamber. Furthermore, the water flow into the grit chamber is tangential, making it difficult to form an initial vortex when the flow is large, which affects the efficiency of inorganic particle separation. Additionally, the limited flow velocity in the grit chamber makes it difficult to separate smaller inorganic particles. Summary of the Invention

[0004] The purpose of this invention is to address the problems that during the pretreatment of water flow, some large solid waste enters the sedimentation tank and affects the sedimentation effect, and that it is difficult to form an initial vortex when a large flow of water enters. Therefore, this invention proposes a municipal water supply and drainage sewage pretreatment device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a municipal water supply and drainage sewage pretreatment device, comprising a sand-removing tank, a rotary trough installed at the top of the sand-removing tank, an arc-shaped plate installed on the inner wall of the rotary trough, and multiple arc-shaped plates arranged circumferentially, an isolation block installed inside the rotary trough, a grid plate installed on one side of the rotary trough, a support frame installed inside the sand-removing tank, a drive module provided on the top surface of the support frame, a sand-draining pipe rotatably installed inside the support frame, and the outer wall of the sand-draining pipe connected to the drive component of the drive module, and a fan blade installed at the bottom end of the sand-draining pipe, further comprising: A separation assembly, the separation assembly including a fence installed inside the rotary trough, the fence being positioned at a distance from the top edge of the sand tank; The first grid has one end rotatably installed in a groove on the outer wall of the fence, and multiple first grids are arranged circumferentially on the outer wall of the fence. The first grid is perpendicular to the outer wall of the fence and can screen impurities entering the water flow.

[0006] As a further description of the above technical solution: The separation component further includes: a baffle, one end of which is rotatably installed in the groove opened on the outer wall of the fence on the other side; a second grid is slidably installed inside the fence, and one end of the second grid is hinged to a connecting shaft opened on one side of the first grid. A rotating ring is rotatably mounted on the outer wall of the top of the enclosure. A support rod is mounted on the top surface of the rotating ring and is located at the top of the enclosure. A connecting block is mounted on the outer wall of the rotating ring, and the rotating ring is limited by the limiting position of the support rod.

[0007] As a further description of the above technical solution: The separation component further includes: a first connecting post, which is installed on the top of the first grid and is located in a groove opened inside the connecting block. The first connecting post is driven to rotate by the rotation of the rotating ring, thereby driving the first grid plate to rotate. An electric push rod is installed at the top of the fence, and both ends of the electric push rod are equipped with fixing blocks.

[0008] As a further description of the above technical solution: The separation assembly further includes: a third connecting post, which is installed at the top of the fence and is rotatably connected to a fixed block at one end of the electric push rod; The second connecting post is installed at the top of the rotating ring and is rotatably connected to the fixed block at the other end of the electric push rod. The rotating ring is pushed to rotate by the extension and retraction of the electric push rod under the limit of the second connecting post and the third connecting post.

[0009] As a further description of the above technical solution: It also includes: an acceleration component, which includes a first fixing frame and a second fixing frame disposed at a distance from the inner wall of the sand tank, and the first fixing frame and the second fixing frame are identical; The guide plate is rotatably connected to the first fixed frame and the second fixed frame through through holes provided inside the first fixed frame and the second connecting frame, and multiple guide plates are arranged in two concentric circles, inner and outer.

[0010] As a further description of the above technical solution: The acceleration component further includes: a rotating plate, which is mounted on the top of the guide plate, and a connector is mounted on the top of the rotating plate; The connecting rod has two ends that are rotatably connected to the connectors at the top of the inner and outer guide plates, respectively. A push block is installed on the top surface of the connecting rod, which can drive the rotating plate and the guide plate to rotate through the connectors when the connecting rod moves.

[0011] As a further description of the above technical solution: The acceleration assembly further includes: a mounting ring, which is installed on the outer wall of the sand-dredging pipe and is located above the first fixing frame. A support rod is installed on the outer wall of the mounting ring, and the support rod has a wing-shaped cross-section. The extrusion block is installed at one end of the support rod and corresponds to the push block. The rotation of the sand suction pipe drives the support rod and the extrusion block to rotate, thereby pushing the push block and the connecting rod to move through the extrusion block.

[0012] As a further description of the above technical solution: It also includes: a rotary assembly, which includes a winding frame disposed inside the inlet of the rotary trough, and the winding frame has multiple winding rods. The winding frame is rotatably connected to the inner wall of the rotary trough through connecting shafts at both ends, and the strip-shaped waste is wound by rotating the winding frame. A drive motor is installed on one side of the rotary groove, and the output shaft of the drive motor passes through the side wall of the rotary groove and is fixedly connected to the winding frame.

[0013] As a further description of the above technical solution: The rotary assembly further includes: a tool holder, which is slidably mounted on the outer wall of the winding rod inside the winding frame, and a connecting ring is installed on the outer side of the tool holder; A connecting frame is slidably installed on the outer wall of the connecting ring, and a reciprocating module is provided at the top of the connecting frame. The reciprocating module is located above the rotary groove. The connecting frame is driven to reciprocate through the reciprocating module, which in turn drives the connecting ring and the tool holder to reciprocate.

[0014] As a further description of the above technical solution: The rotary assembly further includes: a mounting rod, which passes through a partition provided inside the rotary groove and is rotatably connected to the rotary groove, and a gear frame is hinged to the outer wall of the mounting rod, and the gear frame corresponds to the grid plate, and the gap between the gear frame and the grid plate is engaged. An arc-shaped strip is installed on one side of the gear frame and is slidably connected to the mounting rod through a groove opened inside the mounting rod. A spring is installed at one end of the arc-shaped strip and is located inside the mounting rod, while the other end of the spring is fixedly connected to the inner wall of the mounting rod.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by incorporating a separation component, the wastewater is filtered through a first screen before entering the sand separation tank as it enters the rotary tank. Simultaneously, the arc-shaped plate guides the water flow within the rotary tank towards the first screen, ensuring a certain amount of water can smoothly pass through it and enter the sand separation tank. Furthermore, the outer wall of the enclosure has multiple circumferential openings connected to the first screen, and the water flow enters along the side wall of the enclosure, allowing more water to pass through and facilitating the generation of initial vortices. This provides rotational force for subsequent rotation, aiding in the sand separation process. Additionally, when debris accumulates on the surface of the first screen, its angle can be adjusted to clean it through the impact of the water flow.

[0016] 2. In this invention, by incorporating an acceleration component, the design enables the separation of sand and gravel from wastewater as it enters the sand separator. This separation is achieved through the centrifugal force generated by the rotation of the fan blades, which in turn causes the installation ring and the squeezing block to rotate. The squeezing block then pushes the push block and support rod, causing the corresponding inner and outer guide plates to rotate. This tilts the guide plates, accelerating the water flow and generating greater centrifugal force to push the sand and gravel from the wastewater to the inner wall of the sand separator. Furthermore, after the squeezing block and the push block separate, the guide plates return to an angle with minimal resistance to the water flow under the influence of the water flow.

[0017] 3. In this invention, by incorporating a rotating component, the long strips of material in the wastewater can be wound around the wastewater after it enters the rotary trough. Simultaneously, the reciprocating module drives the cutter to move back and forth inside the winding frame, thereby cutting the long strips of material to a suitable length to reduce subsequent impact. Furthermore, during the rotation of the winding frame, the mounting rod drives the toothed frame located at the tail end of the rotary trough to rotate, so that the toothed frame flips the waste at the tail end of the rotary trough onto the grid plate and discharges it, thus preventing waste from accumulating at the tail end of the rotary trough and affecting the processing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a municipal water supply and drainage sewage pretreatment device.

[0019] Figure 2 This is a schematic diagram showing the disassembled structure of a municipal water supply and drainage sewage pretreatment device.

[0020] Figure 3This is a schematic diagram of the combined structure of an acceleration component and a sand pumping pipe in a municipal water supply and drainage sewage pretreatment device.

[0021] Figure 4 This is a schematic diagram of the disassembled structure of a separation component in a municipal water supply and drainage sewage pretreatment device.

[0022] Figure 5 This is a partial structural diagram of a separation component in a municipal water supply and drainage sewage pretreatment device.

[0023] Figure 6 This is a schematic diagram showing the disassembled structure of an acceleration component in a municipal water supply and drainage sewage pretreatment device.

[0024] Figure 7 for Figure 6 A magnified structural diagram of point A in the middle.

[0025] Figure 8 This is a schematic diagram showing the disassembled structure of a rotary component in a municipal water supply and drainage sewage pretreatment device.

[0026] Figure 9 This is a schematic diagram of the rotating component in a municipal water supply and drainage sewage pretreatment device from another angle.

[0027] Figure 10 for Figure 9 A magnified structural diagram at point B in the middle.

[0028] Legend: 1. Support frame; 2. Rotary trough; 3. Arc plate; 4. Sand separator; 5. Separation assembly; 5001. Fence; 5002. First connecting post; 5003. First grid; 5004. Second grid; 5005. Baffle; 5006. Second connecting post; 5007. Rotating ring; 5008. Connecting block; 5009. Support rod; 5010. Third connecting post; 5011. Electric push rod; 5012. Fixing block; 6. Support frame; 7. Sand dredging pipe; 8. Drive module; 9. Spiral strip; 10. Isolation pier; 11. Grid plate; 12. Rotary assembly; 12 01. Reciprocating module; 1202. Connecting frame; 1203. Connecting ring; 1204. Tool holder; 1205. Winding frame; 1206. Drive motor; 1207. Mounting rod; 1208. Gear frame; 1209. Arc strip; 1210. Spring; 13. Fan blade; 14. Acceleration assembly; 1401. Mounting ring; 1402. Support rod; 1403. Extrusion block; 1404. First fixed frame; 1405. Connecting rod; 1406. Push block; 1407. Connector; 1408. Rotating plate; 1409. Guide plate; 1410. Second fixed frame. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1-10 This invention provides a technical solution: a municipal water supply and drainage sewage pretreatment device, including a sand separator 4, a rotary trough 2 installed at the top of the sand separator 4, an arc-shaped plate 3 installed on the inner wall of the rotary trough 2, and multiple arc-shaped plates 3 arranged circumferentially, an isolation block 10 installed inside the rotary trough 2, a grid plate 11 installed on one side of the rotary trough 2, a support frame 6 installed inside the sand separator 4, a drive module 8 provided on the top surface of the support frame 6, a sand suction pipe 7 rotatably installed inside the support frame 6, and the outer wall of the sand suction pipe 7 connected to the drive component of the drive module 8, a fan blade 13 installed at the bottom end of the sand suction pipe 7, and further including: Separation component 5 includes a fence 5001 installed inside the rotary trough 2, and the fence 5001 is positioned at a distance from the top edge of the sand tank 4. The first grid 5003 is rotatably installed at one end in a groove opened on the outer wall of the fence 5001. Multiple first grids 5003 are arranged circumferentially on the outer wall of the fence 5001. The first grids 5003 are perpendicular to the outer wall of the fence. The first grids 5003 can screen the impurities that enter the water flow. The separation component 5 also includes: a baffle 5005, one end of which is rotatably installed in the groove opened on the outer wall of the fence 5001 on the other side; a second grid 5004 is slidably installed inside the fence 5001; and one end of the second grid 5004 is hinged to a connecting shaft opened on one side of the first grid 5003. A rotating ring 5007 is rotatably installed on the outer wall of the top of the enclosure. A support rod 5009 is installed on the top surface of the rotating ring 5007 and is located at the top of the enclosure. A connecting block 5008 is installed on the outer wall of the rotating ring 5007. The rotating ring 5007 is limited by the limiting of the support rod 5009. The separation component 5 also includes: a first connecting post 5002, which is installed on the top of the first grid 5003 and is located in a groove opened inside the connecting block 5008. The first connecting post 5002 is driven to rotate by the rotation of the rotating ring 5007, thereby driving the first grid plate 11 to rotate. Electric push rod 5011 is installed at the top of fence 5001, and fixing blocks 5012 are installed at both ends of electric push rod 5011. The separation component 5 also includes: a third connecting post 5010, which is installed on the top of the fence 5001 and is rotatably connected to a fixing block 5012 provided at one end of the electric push rod 5011. The second connecting post 5006 is installed at the top of the rotating ring 5007 and is rotatably connected to the fixing block 5012 at the other end of the electric push rod 5011. The rotating ring 5007 is pushed to rotate by the extension and retraction of the electric push rod 5011 under the limit of the second connecting post 5006 and the third connecting post 5010.

[0031] The specific implementation is as follows: In the process of treating municipal sewage, sewage is introduced from the inlet provided on one side of the rotary tank 2. As the sewage flows in, it can pass through the opening of the fence 5001 and enter the sand separator 4. At the same time, since the sewage enters along the tangent of the outer wall of the fence 5001 and since the fence 5001 has multiple openings, the sewage can flow along the inner wall of the sand separator 4, thereby providing a certain initial centrifugal force for the water flow inside the sand separator 4. The arc plate 3 can guide the water flow inside the rotary tank 2 to ensure that the water flow can flow to the first grid 5003. Furthermore, since the opening of the fence 5001 is provided with a first grid 5003 perpendicular to the outer wall, larger garbage in the sewage can be filtered through the first grid 5003. Since the second grid 5004 and the baffle 5005 are inclinedly arranged on the back of the first grid 5003, after the water flows through the first grid 5003, it can be inclined into the sand separator 4 under the action of the baffle 5005, and further ensure that the water flow can rotate inside the sand separator 4. Furthermore, as filtration proceeds, if a certain amount of debris accumulates on the surface of the first grille 5003, affecting the water flow, the rotating ring 5007 can be rotated by the extension and retraction of the electric push rod 5011. Under the rotation of the rotating ring 5007, the first connecting column 5002 is moved through the connecting block 5008, which in turn causes the first grille 5003 to rotate. As the first grille 5003 rotates, the second grille 5004 gradually retracts into the baffle 5005, causing the baffle 5005 to rotate. As the first grille 5003 rotates, it gradually forms a certain angle with the outer wall of the enclosure. When the water flows towards the first grille 5003, some of the water can flow along the surface of the first grille 5003 away from the surface of the enclosure 5001, thereby washing away the debris on the surface of the first grille 5003 and allowing it to flow with the water to the end of the rotary channel 2.

[0032] Acceleration assembly 14 includes a first fixing frame 1404 and a second fixing frame 1410 disposed on the inner wall of the sand tank 4, and the first fixing frame 1404 and the second fixing frame 1410 are the same. The guide plate 1409 is rotatably connected to the first fixed frame 1404 and the second fixed frame 1410 through the through hole provided inside the first fixed frame 1404 and the second connecting frame 1202, and multiple guide plates 1409 are arranged in two concentric circles, inner and outer. The acceleration assembly 14 also includes: a rotating plate 1408, which is mounted on the top of the guide plate 1409, and a connector 1407 is mounted on the top of the rotating plate 1408; The connecting rod 1405 has two ends that are rotatably connected to the connectors 1407 provided at the top of the inner and outer guide plates 1409, respectively. A push block 1406 is installed on the top surface of the connecting rod 1405. When the connecting rod 1405 moves, it can drive the rotating plate 1408 and the guide plate 1409 to rotate through the connectors 1407. The acceleration assembly 14 also includes: a mounting ring 1401, which is installed on the outer wall of the sand dredging pipe 7 and is located above the first fixing frame 1404. A support rod 1402 is installed on the outer wall of the mounting ring 1401, and the support rod 1402 has a wing-shaped cross section. The extrusion block 1403 is installed at one end of the support rod 1402 and corresponds to the push block 1406. The rotation of the sand suction pipe 7 drives the support rod 1402 and the extrusion block 1403 to rotate, and then the extrusion block 1403 pushes the push block 1406 and the connecting rod 1405 to move.

[0033] The specific implementation is as follows: During the sewage treatment process, the drive module 8 can drive the sand suction pipe 7 to rotate. At the same time, since the outer wall of the sand suction pipe 7 is provided with fan blades 13, the fan blades 13 can drive the water flow to rotate. In this way, the centrifugal force generated during the water flow rotation causes the sand and gravel particles in the sewage to be thrown towards the inner wall of the sand tank 4 and gradually sink downwards and then be extracted through the sand discharge pipe at the bottom of the sand tank 4. Furthermore, during the rotation of the sand-dredging pipe 7, the mounting ring 1401 rotates, and the support rod 1402 drives the extrusion block 1403 to rotate. During the rotation of the extrusion block 1403, the inclined surface on its outer side contacts the pushing block 1406, pushing it. This push causes the pushing block 1406 and connecting rod 1405 to move. As the connecting rod 1405 moves, it drives the rotating plate 1408 to rotate via the connector 1407. Since the connecting rod 1405 is connected to inner... The connectors 1407 at the top of the outer two rings of guide plates 1409 are connected by the connecting rod 1405 driving the rotating plate 1408 to rotate, which in turn drives the inner and outer rings of guide plates 1409 to rotate. After the guide plates 1409 rotate, one side of them can guide the water flow and accelerate the water flow to the outer ring, thereby increasing the centrifugal force of the water flow, which is conducive to throwing the sand and gravel in the water flow toward the inner wall of the sand tank 4. Since the inner wall of the sand tank 4 is provided with spiral strips 9, the sand and gravel can move downward along the spiral strips 9 under the guidance of the spiral strips 9, and the water flow can prevent the sand and gravel from being blown away. Furthermore, as the squeezing block 1403 separates from the pushing block 1406, the flow of water can push the guide plate 1409 to swing and rotate to a certain angle under the guidance of the water flow. At this angle, the resistance of the guide plate 1409 to the water flow is minimal, thereby ensuring that the water flow can stably generate vortices and maintain a certain centrifugal force, which is beneficial to the separation of sand and gravel.

[0034] The rotary assembly 12 includes a winding frame 1205 disposed inside the inlet of the rotary trough 2, and the winding frame 1205 has multiple winding rods. The winding frame 1205 is rotatably connected to the inner wall of the rotary trough 2 through connecting shafts at both ends. The strip-shaped waste is wound by rotating the winding frame 1205. The drive motor 1206 is installed on one side of the rotary groove 2, and the output shaft of the drive motor 1206 passes through the side wall of the rotary groove 2 and is fixedly connected to the winding frame 1205. The rotary assembly 12 also includes: a tool holder 1204, which is slidably mounted on the outer wall of the winding rod inside the winding frame 1205, and a connecting ring 1203 is installed on the outer side of the tool holder 1204; The connecting frame 1202 is slidably installed on the outer wall of the connecting ring 1203, and a reciprocating module 1201 is provided at the top of the connecting frame 1202. The reciprocating module 1201 is located above the rotary groove 2. The reciprocating module 1201 drives the connecting frame 1202 to reciprocate, thereby driving the connecting ring 1203 and the tool holder 1204 to reciprocate. The rotary assembly 12 also includes: a mounting rod 1207, which passes through the partition provided inside the rotary groove 2 and is rotatably connected to the rotary groove 2. A gear frame 1208 is hinged to the outer wall of the mounting rod 1207, and the gear frame 1208 corresponds to the grid plate 11, and the gap between the gear frame 1208 and the grid plate 11 is engaged. The arc-shaped strip 1209 is installed on one side of the gear frame 1208, and the arc-shaped strip 1209 is slidably connected to the mounting rod 1207 through a groove opened inside the mounting rod 1207. A spring 1210 is installed at one end of the arc-shaped strip 1209, and the spring 1210 is located inside the mounting rod 1207. The other end of the spring 1210 is fixedly connected to the inner wall of the mounting rod 1207.

[0035] The specific implementation is as follows: When the water flows into the rotary tank 2, the drive motor 1206 can drive the winding frame 1205 to rotate, and the multiple winding rods inside the winding frame 1205 can wind the long strip-shaped material in the sewage. As the winding frame 1205 rotates, the cutter holder 1204 and the connecting ring 1203 can rotate at the bottom of the connecting frame 1202. Then, the reciprocating module 1201 can drive the connecting frame 1202 to move, and drive the cutter holder 1204 to move. In this way, the movement of the cutter holder 1204 can cut the long strip-shaped material wound by the winding frame 1205 into a suitable length to reduce the impact. Furthermore, during the rotation of the winding frame 1205, the mounting rod 1207 located at the tail end of the rotary trough 2 can be driven to rotate, and the rotation of the mounting rod 1207 drives the tooth frame 1208 to rotate. In this way, the rotation of the tooth frame 1208 drives the garbage at the tail end of the rotary trough 2 upward, and when the tooth frame 1208 rotates to a certain angle, the garbage falls onto the surface of the grid plate 11 under the influence of gravity and slides outward. Since the gap between the tooth frame 1208 and the grid plate 11 corresponds, the tooth frame 1208 can pass through the grid plate 11. Furthermore, if there is debris between the grid plate 11 and the toothed frame 1208 causing blockage, the rotation of the mounting rod 1207 will cause relative rotation between the mounting rod 1207 and the toothed frame 1208. As the mounting rod 1207 continues to rotate, the angle between the toothed frame 1208 and the surface of the grid plate 11 gradually increases, and the fulcrum is at the position in contact with the debris. Thus, the debris is pushed outward from the surface of the grid plate 11 by the toothed frame 1208.

[0036] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A municipal water supply and drainage wastewater pretreatment device, comprising: A sand-removing tank (4) is provided with a rotating groove (2) at its top. An arc-shaped plate (3) is installed on the inner wall of the rotating groove (2), and multiple arc-shaped plates (3) are arranged circumferentially. An isolation block (10) is installed inside the rotating groove (2). A grid plate (11) is installed on one side of the rotating groove (2). A support frame (6) is installed inside the sand-removing tank (4). A drive module (8) is provided on the top surface of the support frame (6). A sand-draining pipe (7) is rotatably installed inside the support frame (6), and the outer wall of the sand-draining pipe (7) is connected to the drive component of the drive module (8). A fan blade (13) is installed at the bottom end of the sand-draining pipe (7). The sand-draining pipe (7) is characterized by further comprising: The separation component (5) includes a fence (5001) installed inside the rotary trough (2) and the fence (5001) is positioned at a distance from the top edge of the sand tank (4); The first grid (5003) is rotatably installed at one end in a groove opened on the outer wall of the fence (5001), and there are multiple first grids (5003) arranged circumferentially on the outer wall of the fence (5001). The first grids (5003) are perpendicular to the outer wall of the fence. The first grids (5003) can screen the impurities entering the water flow. The separation component (5) further includes: A baffle (5005) is rotatably installed at one end in a groove opened on the outer wall of the fence (5001) on the other side. A second grille (5004) is slidably installed inside the fence (5001), and one end of the second grille (5004) is hinged to a connecting shaft opened on one side of the first grille (5003). A rotating ring (5007) is rotatably mounted on the outer wall of the top of the enclosure. A support rod (5009) is mounted on the top surface of the rotating ring (5007) and the support rod (5009) is located at the top of the enclosure. A connecting block (5008) is mounted on the outer wall of the rotating ring (5007). The rotating ring (5007) is limited by the support rod (5009). The first connecting post (5002) is installed on the top of the first grid (5003) and is located in the groove opened inside the connecting block (5008). The first connecting post (5002) is driven to rotate by the rotation of the rotating ring (5007) and the connecting block (5008) is used to drive the first connecting post (5002) to rotate, thereby driving the first grid plate (11) to rotate. An electric push rod (5011) is installed at the top of the fence (5001), and fixing blocks (5012) are installed at both ends of the electric push rod (5011). The third connecting post (5010) is installed at the top of the fence (5001) and is rotatably connected to the fixing block (5012) at one end of the electric push rod (5011). The second connecting post (5006) is installed on the top of the rotating ring (5007) and is rotatably connected to the fixing block (5012) at the other end of the electric push rod (5011). The rotating ring (5007) is pushed to rotate by the extension and retraction of the electric push rod (5011) under the limit of the second connecting post (5006) and the third connecting post (5010).

2. A municipal water supply and drainage sewage pretreatment device according to claim 1, characterized in that, Also includes: Acceleration assembly (14), the acceleration assembly (14) includes a first fixing frame (1404) and a second fixing frame (1410) disposed on the inner wall of the sand tank (4), and the first fixing frame (1404) and the second fixing frame (1410) are the same; The guide plate (1409) is rotatably connected to the first fixed frame (1404) and the second fixed frame (1410) through the through holes provided inside the first fixed frame (1404) and the second connecting frame (1202), and there are multiple guide plates (1409) arranged in two inner and outer circles.

3. A municipal water supply and drainage sewage pretreatment device according to claim 2, characterized in that, The acceleration component (14) also includes: A rotating plate (1408) is mounted on the top of a guide plate (1409), and a connector (1407) is mounted on the top of the rotating plate (1408). The connecting rod (1405) has two ends that are rotatably connected to the connectors (1407) provided at the top of the inner and outer corresponding guide plates (1409). The top surface of the connecting rod (1405) is equipped with a push block (1406), which can drive the rotating plate (1408) and the guide plate (1409) to rotate through the connectors (1407) when the connecting rod (1405) moves.

4. A municipal water supply and drainage sewage pretreatment device according to claim 3, characterized in that, The acceleration component (14) also includes: Mounting ring (1401) is installed on the outer wall of the sand dredging pipe (7) and is located above the first fixing frame (1404). A support rod (1402) is installed on the outer wall of the mounting ring (1401) and the cross section of the support rod (1402) is wing-shaped. The extrusion block (1403) is installed at one end of the support rod (1402) and corresponds to the push block (1406). The rotation of the sand suction pipe (7) drives the support rod (1402) and the extrusion block (1403) to rotate, and then the extrusion block (1403) pushes the push block (1406) and the connecting rod (1405) to move.

5. A municipal water supply and drainage sewage pretreatment device according to claim 1, characterized in that, Also includes: Rotary assembly (12), the rotary assembly (12) includes a winding frame (1205) disposed inside the inlet of the rotary trough (2), and the winding frame (1205) has multiple winding rods, and the winding frame (1205) is rotatably connected to the inner wall of the rotary trough (2) through the connecting shafts provided at both ends, and the strip-shaped garbage is wound by the rotation of the winding frame (1205); The drive motor (1206) is installed on one side of the rotary groove (2), and the output shaft of the drive motor (1206) passes through the side wall of the rotary groove (2) and is fixedly connected to the winding frame (1205).

6. A municipal water supply and drainage sewage pretreatment device according to claim 5, characterized in that, The slewing assembly (12) also includes: The tool holder (1204) is slidably mounted on the outer wall of the winding rod inside the winding frame (1205), and a connecting ring (1203) is installed on the outer side of the tool holder (1204). A connecting frame (1202) is slidably installed on the outer wall of the connecting ring (1203), and a reciprocating module (1201) is provided at the top of the connecting frame (1202). The reciprocating module (1201) is located above the rotary groove (2). The reciprocating module (1201) drives the connecting frame (1202) to reciprocate, thereby driving the connecting ring (1203) and the tool holder (1204) to reciprocate.

7. A municipal water supply and drainage sewage pretreatment device according to claim 5, characterized in that, The slewing assembly (12) also includes: Mounting rod (1207), which passes through the partition provided inside the rotary groove (2) and is rotatably connected to the rotary groove (2), and a toothed frame (1208) is hinged to the outer wall of the mounting rod (1207), and the toothed frame (1208) corresponds to the grid plate (11), and the gap between the toothed frame (1208) and the grid plate (11) meshes; An arc-shaped strip (1209) is installed on one side of the gear frame (1208), and the arc-shaped strip (1209) is slidably connected to the mounting rod (1207) through a groove opened inside the mounting rod (1207). A spring (1210) is installed at one end of the arc-shaped strip (1209), and the spring (1210) is located inside the mounting rod (1207), and the other end of the spring (1210) is fixedly connected to the inner wall of the mounting rod (1207).

Images