A grating for treating sewage

Abstract

The utility model discloses a kind of grating for sewage treatment, it is related to sewage treatment field, two vertical protection components are fixed symmetrically in the lower part of box, each vertical protection component is close to the side of another vertical protection component It is provided with vertical sliding slot, screw rod mechanism includes transmission screw rod and the sliding block of screw thread connection in transmission screw rod exterior, the upper end of transmission screw rod is rotatably installed on the box, drive mechanism is installed on the box and is used to drive two transmission screw rod rotation, each transmission screw rod is located in a vertical sliding slot, each sliding block is slidably installed in a vertical sliding slot, two sliding blocks are respectively fixed on the left and right sides of grating body, the surface of grating body is provided with water inlet, the bottom of grating body has bottom plate that can be opened and closed. The grating for sewage treatment can avoid damage caused by back and forth shaking of grating body in vertical motion, and dirt will not be thrown to cause secondary pollution, and then avoid affecting the effect of filtering and removing dirt.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a bar screen for wastewater treatment. Background Technology

[0002] Wastewater treatment screens are the core equipment in the pretreatment stage. They use the gaps between the screen bars to intercept and remove larger suspended and floating solid debris in the water flow, effectively preventing blockage and wear of subsequent water pumps, pipelines and treatment structures, and ensuring the stable operation and treatment efficiency of the entire treatment process.

[0003] While existing wastewater treatment screens can be lifted from the sewage tank or well using ropes when there is a lot of debris inside, allowing for the replacement or cleaning of the settled debris before being lowered back into the screen, the following drawbacks still exist: when the screen is lifted by ropes, the ropes swing back and forth due to gravity, causing the screen body to collide with the surrounding environment and damage the screen itself. At the same time, during the shaking, the debris inside may be thrown out, causing secondary pollution and affecting the filtration and removal efficiency. Utility Model Content

[0004] To solve the above technical problems, this utility model provides a bar screen for wastewater treatment, which avoids damage caused by the bar screen body swaying back and forth during vertical movement, and prevents the spillage of dirt and secondary pollution, thereby avoiding affecting the filtration and dirt removal effect.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a bar screen for wastewater treatment, comprising a housing, a bar screen body, a drive mechanism, two vertical protective components, and two screw mechanisms. The two vertical protective components are symmetrically fixed to the lower part of the housing. Each vertical protective component has a vertical groove on the side closest to the other vertical protective component. The screw mechanism includes a transmission screw and a slider threaded to the outside of the transmission screw. The upper end of the transmission screw is rotatably mounted on the housing. The drive mechanism is mounted on the housing and is used to drive the two transmission screws to rotate. Each transmission screw is located in one of the vertical grooves, and each slider is slidably mounted in one of the vertical grooves. The two sliders are respectively fixed to the left and right sides of the bar screen body. The surface of the bar screen body is provided with a water inlet, and the bottom of the bar screen body has a base plate that can be opened and closed.

[0007] Preferably, the driving mechanism includes a rotating rod, a rotating handle, and two transmission components. The two ends of the rotating rod rotate the two sides of the housing respectively. One end of the rotating rod extends to the outside of the housing and is fixedly connected to the rotating handle. The rotating rod can drive the two transmission screws to rotate through the two transmission components respectively.

[0008] Preferably, the transmission assembly includes a first bevel gear, a fixed frame, a connecting rod, a second bevel gear, a third bevel gear, and a fourth bevel gear. The first bevel gear is fixedly sleeved on the rotating rod. The fixed frame is fixed to the bottom of the housing. The connecting rod is rotatably mounted on the fixed frame. The rotating rod and the connecting rod are both horizontally arranged and perpendicular to each other. The second bevel gear and the third bevel gear are fixedly sleeved at both ends of the connecting rod, respectively. The second bevel gear meshes with the first bevel gear. The upper end of the transmission screw extends into the housing and is fixedly sleeved with the fourth bevel gear, which meshes with the third bevel gear.

[0009] Preferably, the fixing frame includes a fixing column and a fixing cylinder. The lower end of the fixing column is fixed to the bottom of the box, and the upper end of the fixing column is fixed to the fixing cylinder. The axial direction of the fixing cylinder is perpendicular to the axial direction of the rotating rod, and the connecting rod is rotatably installed in the fixing cylinder.

[0010] Preferably, the rotating handle includes a rotating disk and a handle rod. The rotating disk is fixed to one end of the rotating rod that extends outside the housing. The central axis of the rotating disk is collinear with the central axis of the rotating rod. A plurality of slots are arranged circumferentially on the side of the rotating disk away from the rotating rod. The handle rod is used to engage with any one of the slots.

[0011] Preferably, a limiting plate is fixed at the bottom of each of the transmission screws.

[0012] Preferably, the grille body further includes a top plate, a front plate, a rear grille plate, a fixing mechanism, and two side grille plates. The front plate and the rear grille plate are respectively fixed to the front and rear sides of the lower part of the top plate, and the two side grille plates are respectively fixed to the left and right sides of the lower part of the top plate. The front and rear ends of each side grille plate are respectively fixedly connected to the front plate and the rear grille plate. The two sliders are respectively fixed to the outer side of the upper part of the two side grille plates. The upper and lower parts of the front plate are respectively provided with the water inlet and the mounting port. A grille baffle is fixed in the mounting port. The bottom of the front plate, the rear grille plate, and the two side grille plates form an opening. The two ends of the bottom plate are respectively rotatably mounted on the two side grille plates. The bottom plate can close the opening and is fixed to the two side grille plates by the fixing mechanism.

[0013] Preferably, the fixing mechanism includes two limiting pins. The two ends of the front part of the base plate are rotatably mounted on the two side grille plates respectively. The lower part of the rear grille plate and the connection between the rear grille plate and the two side grille plates is provided with a clearance groove. A protrusion is provided at both the left and right ends of the base plate. The clearance groove is used to accommodate the rear part of the base plate and the two protrusions. A first limiting hole is provided on the protrusion. A second limiting hole is provided at the lower part of each side grille plate, penetrating its rear end. When the base plate is rotated to close the opening, each first limiting hole corresponds to a second limiting hole. Each limiting pin is used to pass through a first limiting hole and extend into a second limiting hole.

[0014] Preferably, one end of the limiting pin is fixedly connected to a stop bar perpendicular to the limiting pin.

[0015] Preferably, it also includes a plurality of fixing piles, and the bottom of each of the side grid plates is fixed with a plurality of fixing piles, the bottom of the fixing piles having an inverted conical structure.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The upper end of the drive screw of the wastewater treatment screen of this utility model is rotatably mounted on the housing. The drive mechanism is mounted on the housing and is used to drive the two drive screws to rotate. Each drive screw is located in a vertical groove, and each slider is slidably mounted in a vertical groove. The two sliders are respectively fixed to the left and right sides of the screen body. In use, the drive mechanism drives the two drive screws to rotate, so that the sliders can move vertically under the drive of the drive screws, thereby driving the screen body to move vertically. This structure replaces the traditional suspension rope, avoiding damage caused by the screen body swaying back and forth during vertical movement, and preventing the spillage of dirt and secondary pollution, thus avoiding affecting the filtration and dirt removal effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of the bar screen for wastewater treatment provided by this utility model;

[0020] Figure 2 A three-dimensional structural diagram of the drive mechanism, screw mechanism and bar body of the bar for wastewater treatment provided by this utility model;

[0021] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 The screw mechanism and the screen body of the screen for wastewater treatment provided by this utility model are in an assembled state in a three-dimensional structural diagram.

[0023] Figure 5 The side view of the screw mechanism and the screen body of the screen for wastewater treatment provided by this utility model are in a separated state.

[0024] Figure 6 The bottom plate of the screen body for wastewater treatment provided by this utility model is a three-dimensional structural diagram when it is in the open state.

[0025] Figure 7 A three-dimensional structural diagram of the base plate of the bar screen for wastewater treatment provided by this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Box body; 2. Vertical protective component; 3. Rotating rod; 4. Rotating handle; 41. Rotating disc; 42. Handle lever; 5. First bevel gear; 6. Fixed column; 7. Fixed cylinder; 8. Connecting rod; 9. Second bevel gear; 10. Third bevel gear; 11. Fourth bevel gear; 12. Transmission screw; 13. Sliding block; 14. Vertical slide groove; 15. Limiting plate; 16. Top plate; 17. Front plate; 18. Rear grille plate; 19. Side grille plate; 20. Water inlet; 21. Grille baffle; 22. Bottom plate; 23. Protrusion; 24. First limiting hole; 25. Second limiting hole; 26. Limiting pin; 27. Stop bar; 28. Fixed stake. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The purpose of this invention is to provide a bar screen for wastewater treatment that avoids damage caused by the bar screen body swaying back and forth during vertical movement, and prevents waste from being spilled and causing secondary pollution, thereby avoiding affecting the filtration and removal effect.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1-7As shown, this embodiment provides a bar screen for wastewater treatment, including a housing 1, a bar screen body, a drive mechanism, two vertical protection components 2, and two screw mechanisms. The two vertical protection components 2 are symmetrically fixed to the lower part of the housing 1. Each vertical protection component 2 has a vertical groove 14 on the side near the other vertical protection component 2. The screw mechanism includes a transmission screw 12 and a slider 13 threaded to the outside of the transmission screw 12. The upper end of the transmission screw 12 is rotatably mounted on the housing 1. The drive mechanism is mounted on the housing 1 and is used to drive the two vertical protection components 2. Each drive screw 12 rotates, and each drive screw 12 is located in a vertical slide groove 14. Each slider 13 is slidably installed in a vertical slide groove 14. The vertical slide groove 14 can restrict the circumferential movement of the slider 13, so that the slider 13 can only move in the vertical direction. The two sliders 13 are respectively fixed on the left and right sides of the grille body. Specifically, the two sliders 13 are respectively fixed on the top of the left and right sides of the grille body. The surface of the grille body is provided with a water inlet 20, and the bottom of the grille body has a bottom plate 22 that can be opened and closed.

[0031] In use, the two transmission screws 12 are driven to rotate by the drive mechanism, so that the slider 13 can move vertically under the drive of the transmission screws 12, thereby driving the grid body to move vertically. This structure replaces the traditional hanging rope, avoiding damage caused by the grid body swaying back and forth during vertical movement, and preventing dirt from being thrown out and causing secondary pollution, thus avoiding affecting the filtration and dirt removal effect.

[0032] In this embodiment, the box 1 can be fixed to the top of the sewage well or sewage pool, or it can be equipped with rollers so that it can be transported away from the well opening after use.

[0033] The drive mechanism includes a rotating rod 3, a rotating handle 4, and two transmission components. The two ends of the rotating rod 3 rotate the two sides of the housing 1 respectively. One end of the rotating rod 3 extends to the outside of the housing 1 and is fixedly connected to the rotating handle 4. The rotating rod 3 can drive the two transmission screws 12 to rotate through the two transmission components respectively.

[0034] Specifically, the rotating rod 3 is located in the housing 1, and its two ends are rotatably installed on the left and right sides of the housing 1 respectively. One end of the rotating rod 3 extends out from the right side of the housing 1 and is fixedly connected to the rotating handle 4.

[0035] like Figure 2As shown, the transmission assembly includes a first bevel gear 5, a fixed frame, a connecting rod 8, a second bevel gear 9, a third bevel gear 10, and a fourth bevel gear 11. The first bevel gear 5 is fixedly sleeved on the rotating rod 3. The fixed frame is fixed to the bottom of the housing 1. The connecting rod 8 is rotatably mounted on the fixed frame. The rotating rod 3 and the connecting rod 8 are both horizontally arranged and perpendicular to each other. The two ends of the connecting rod 8 are respectively fixedly sleeved with the second bevel gear 9 and the third bevel gear 10. The second bevel gear 9 meshes with the first bevel gear 5. The upper end of the transmission screw 12 extends into the housing 1 and is fixedly sleeved with the fourth bevel gear 11. The fourth bevel gear 11 meshes with the third bevel gear 10.

[0036] The fixing frame includes a fixing column 6 and a fixing cylinder 7. The lower end of the fixing column 6 is fixed to the bottom of the box 1, and the upper end of the fixing column 6 is fixed to the fixing cylinder 7. The axial direction of the fixing cylinder 7 is perpendicular to the axial direction of the rotating rod 3. The connecting rod 8 is rotatably installed in the fixing cylinder 7, and the front and rear ends of the connecting rod 8 are located outside the fixing cylinder 7. The front end and rear end of the connecting rod 8 are respectively fixedly sleeved with a second bevel gear 9 and a third bevel gear 10.

[0037] The rotating handle 4 includes a rotating disc 41 and a handle 42. The rotating disc 41 is fixed to one end of the rotating rod 3 that extends outside the housing 1. The central axis of the rotating disc 41 is collinear with the central axis of the rotating rod 3. Multiple slots are arranged circumferentially on the side of the rotating disc 41 away from the rotating rod 3. The handle 42 is used to engage with any one of the slots.

[0038] Operators can rotate handle 4 to rotate lever 3, thereby controlling the rotation of the first bevel gear 5, the second bevel gear 9, the connecting rod 8, the third bevel gear 10, and the fourth bevel gear 11, which in turn rotates the transmission screw 12, thereby controlling the vertical lifting and lowering of the grille body.

[0039] To prevent the slider 13 from coming off the bottom of the transmission screw 12, a limiting plate 15 is fixed to the bottom of each transmission screw 12, and each limiting plate 15 is located below the bottom of a vertical protective component 2.

[0040] In this embodiment, the transmission screw 12 can be replaced according to the depth of the sewage well, that is, different lengths of transmission screw 12 can be used according to the depth of the sewage well.

[0041] Specifically, the cross-sectional shape of the slider 13 is the same as the cross-sectional shape of the vertical slide groove 14. The vertical protection component 2 is a vertical protective cover with a vertical slide groove 14, which can limit and guide the slider 13 on the one hand, and protect the transmission screw 12 located in the vertical slide groove 14 on the other hand.

[0042] In use, by rotating handle 4, the screen body is lowered until the slider 13 contacts the limiting plate 15. At this time, the screen body is located below the transmission screw 12. When the screen body slides to the bottom of the sewage well, the transmission screw 12 is located above the screen body and will not be submerged by sewage. A vertical protective cover is provided to prevent sewage from splashing onto the transmission screw 12.

[0043] The grating body also includes a top plate 16, a front plate 17, a rear grating plate 18, a fixing mechanism, and two side grating plates 19. The front plate 17 and the rear grating plate 18 are respectively fixed to the front and rear sides of the lower part of the top plate 16, and the two side grating plates 19 are respectively fixed to the left and right sides of the lower part of the top plate 16. The front and rear ends of each side grating plate 19 are respectively fixedly connected to the front plate 17 and the rear grating plate 18. Two sliders 13 are respectively fixed to the outer side of the upper end of the two side grating plates 19. The upper and lower parts of the front plate 17 are respectively provided with a water inlet 20 and an installation port. A grating baffle 21 is fixed in the installation port. The bottom of the front plate 17, the rear grating plate 18, and the two side grating plates 19 form an opening. The two ends of the bottom plate 22 are respectively rotatably installed on the two side grating plates 19. The bottom plate 22 can close the opening and is fixed to the two side grating plates 19 by the fixing mechanism.

[0044] In this embodiment, the top and bottom of the grille body do not have mesh grille structures, but all four sides of the grille body have mesh grille structures, allowing sewage to pass through. An inlet 20 is located at the top of the front plate 17 of the grille body. A grille baffle 21 is fixedly connected to the front plate 17 near the inlet 20. The inlet 20 and the baffle 21 together occupy one side of the grille body. Sewage enters the interior of the grille body through the inlet 20, and the baffle 21 prevents larger debris from leaking out from the side where the inlet 20 is located. After lifting the grille body upwards, sewage flows out from the baffle 21 and the other three sides, while debris and garbage remain inside the grille body for easy cleaning later.

[0045] like Figure 6 and Figure 7As shown, the fixing mechanism includes two limiting pins 26. The two ends of the front part of the base plate 22 are rotatably mounted on the two side grid plates 19 respectively. The rear grid plate 18 and the lower part of the connection between the rear grid plate 18 and the two side grid plates 19 are provided with clearance grooves. The left and right ends of the base plate 22 are each provided with a protrusion 23. The clearance groove is used to accommodate the rear part of the base plate 22 and the two protrusions 23. The protrusions 23 are provided with first limiting holes 24. The lower part of each side grid plate 19 is provided with a second limiting hole 25 that passes through its rear end. When the base plate 22 is rotated to close the opening, each first limiting hole 24 corresponds to a second limiting hole 25. Each limiting pin 26 is used to pass through a first limiting hole 24 and extend into a second limiting hole 25, thereby limiting the base plate 22 to the bottom of the grid body. When the equipment is running, the base plate 22 can close the opening at the bottom of the grid body, and garbage and dirt will not flow out from the bottom.

[0046] In this specific embodiment, the first limiting hole 24 and the second limiting hole 25 have the same diameter, and the outer diameter of the limiting pin 26 is the same as the diameter of the first limiting hole 24 and the second limiting hole 25, so that the limiting pin 26 can be stably inserted into the first limiting hole 24 and the second limiting hole 25.

[0047] In order to limit the insertion of the limiting pin 26 and to facilitate the pulling of the limiting pin 26, a stop bar 27 perpendicular to the limiting pin 26 is fixedly connected to one end of the limiting pin 26.

[0048] In this embodiment, by setting up a structure in which a rotatable base plate 22 cooperates with a limiting pin 26, after the grid body is raised to the ground, the worker can pull the limiting pin 26 to disengage from the second limiting hole 25 and the first limiting hole 24. At this time, the base plate 22 can rotate on the bottom surface of the grid body, opening the opening, allowing the worker to empty and transport the garbage inside the grid body. That is, the worker controls the rotation of the base plate 22 by pulling the limiting pin 26, making it easy to clean the dirt and garbage in the grid body. The opening and closing of the opening can be achieved through simple operation, thereby speeding up the cleaning process.

[0049] This embodiment also includes multiple fixing piles 28, each fixing pile 28 being fixed to the bottom of the grid body. Specifically, multiple fixing piles 28 are fixed to the bottom of each side grid plate 19, and the bottom of the fixing pile 28 is an inverted cone structure.

[0050] Sewage wells and sewage tanks typically accumulate sludge at the bottom. The fixing pile 28 can be inserted into this sludge to stabilize the screen body and prevent it from shaking. Furthermore, by designing the bottom of the fixing pile 28 as an inverted cone shape, it becomes even easier for the fixing pile 28 to be inserted into the sludge at the bottom.

[0051] In this specific embodiment, each side grid plate 19 has two fixing piles 28 fixed at its bottom, and the bottom of the fixing pile 28 has an inverted conical structure.

[0052] The specific usage process is as follows: The staff places the box 1 on the top of the sewage well or sewage pool, aligns the screen body with the inlet, and the inlet 20 with the direction of sewage inflow. At this time, the staff holds the rotating handle 4 and rotates it. The rotating rod 3 will drive the first bevel gear 5 to rotate, the first bevel gear 5 will drive the second bevel gear 9 to rotate, the second bevel gear 9 will drive the connecting rod 8 to rotate inside the fixed pipe, the connecting rod 8 will drive the third bevel gear 10 to rotate, the third bevel gear 10 will drive the fourth bevel gear 11 and the transmission screw 12 to rotate, and the slider 13 will move downward along the vertical slide groove 14, thereby driving the screen body to move downward.

[0053] Workers lower the screen body to the bottom of the sewage well or sewage tank through the above operations. The fixing pile 28 can be inserted into the sludge to stabilize the screen body. Since the slider 13 is set on the top side of the screen body and the slider 13 is in contact with the limiting plate 15 at the bottom of the transmission screw 12, the transmission screw 12 is located above the screen body and will not be submerged by sewage.

[0054] When the sewage pipe is opened, sewage enters the interior of the screen body through the inlet 20. The screen body has large gaps on its surface, so large garbage or particles will be left inside the screen body. The remaining sewage flows out through the gaps in the screen and enters the next sewage purification stage. When there is a lot of dirt inside the screen body, the staff turns the handle 4 to make the rotating rod 3 rotate in the opposite direction. The rotation of the first bevel gear 5, the second bevel gear 9, the connecting rod 8, the third bevel gear 10 and the fourth bevel gear 11 will drive the transmission screw 12 to rotate in the opposite direction. The slider 13 will move upward along the vertical slide 14, thereby driving the screen body to move upward and rise to the sewage well opening.

[0055] Afterwards, the staff placed a container that could hold the waste on the side of the base plate 22 that could be opened, and then pulled out the limiting pin 26. The base plate 22 rotated and opened, and the waste inside the screen body flowed into the container due to gravity. After the waste flowed out, the staff lifted the base plate 22, aligned the first limiting hole 24 with the second limiting hole 25, and inserted the limiting pin 26 inside to fix the base plate 22. The previous operation was repeated to sink the screen body into the sewage well and start a new round of filtration and cleaning.

[0056] This specification uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A bar screen for wastewater treatment, characterized in that, The device includes a housing, a grille body, a drive mechanism, two vertical protection components, and two lead screw mechanisms. The two vertical protection components are symmetrically fixed to the lower part of the housing. Each vertical protection component has a vertical groove on the side closest to the other vertical protection component. The lead screw mechanism includes a transmission lead screw and a slider threaded to the outside of the transmission lead screw. The upper end of the transmission lead screw is rotatably mounted on the housing. The drive mechanism is mounted on the housing and is used to drive the two transmission lead screws to rotate. Each transmission lead screw is located in one of the vertical grooves, and each slider is slidably mounted in one of the vertical grooves. The two sliders are respectively fixed to the left and right sides of the grille body. The surface of the grille body is provided with a water inlet, and the bottom of the grille body has a base plate that can be opened and closed.

2. The bar screen for wastewater treatment according to claim 1, characterized in that, The driving mechanism includes a rotating rod, a rotating handle, and two transmission components. The two ends of the rotating rod rotate the two sides of the housing respectively. One end of the rotating rod extends to the outside of the housing and is fixedly connected to the rotating handle. The rotating rod can drive the two transmission screws to rotate through the two transmission components respectively.

3. The bar screen for wastewater treatment according to claim 2, characterized in that, The transmission assembly includes a first bevel gear, a fixed frame, a connecting rod, a second bevel gear, a third bevel gear, and a fourth bevel gear. The first bevel gear is fixedly sleeved on the rotating rod. The fixed frame is fixed to the bottom of the housing. The connecting rod is rotatably mounted on the fixed frame. The rotating rod and the connecting rod are both horizontally arranged and perpendicular to each other. The second bevel gear and the third bevel gear are fixedly sleeved at both ends of the connecting rod, respectively. The second bevel gear meshes with the first bevel gear. The upper end of the transmission screw extends into the housing and is fixedly sleeved with the fourth bevel gear, which meshes with the third bevel gear.

4. The bar screen for wastewater treatment according to claim 3, characterized in that, The fixing frame includes a fixing column and a fixing cylinder. The lower end of the fixing column is fixed to the bottom of the box, and the upper end of the fixing column is fixed to the fixing cylinder. The axial direction of the fixing cylinder is perpendicular to the axial direction of the rotating rod, and the connecting rod is rotatably installed in the fixing cylinder.

5. The bar screen for wastewater treatment according to claim 2, characterized in that, The rotating handle includes a rotating disc and a handle rod. The rotating disc is fixed to one end of the rotating rod that extends outside the housing. The central axis of the rotating disc is collinear with the central axis of the rotating rod. Multiple slots are arranged circumferentially on the side of the rotating disc away from the rotating rod. The handle rod is used to engage with any one of the slots.

6. The bar screen for wastewater treatment according to claim 1, characterized in that, Each of the aforementioned lead screws has a limiting plate fixed to its bottom.

7. The bar screen for wastewater treatment according to claim 1, characterized in that, The grating body also includes a top plate, a front plate, a rear grating plate, a fixing mechanism, and two side grating plates. The front plate and the rear grating plate are respectively fixed to the front and rear sides of the lower part of the top plate, and the two side grating plates are respectively fixed to the left and right sides of the lower part of the top plate. The front and rear ends of each side grating plate are respectively fixedly connected to the front plate and the rear grating plate. The two sliders are respectively fixed to the outer side of the upper part of the two side grating plates. The upper and lower parts of the front plate are respectively provided with the water inlet and the mounting port. A grating baffle is fixed in the mounting port. The bottom of the front plate, the rear grating plate, and the two side grating plates form an opening. The two ends of the bottom plate are respectively rotatably mounted on the two side grating plates. The bottom plate can close the opening and is fixed to the two side grating plates by the fixing mechanism.

8. The bar screen for wastewater treatment according to claim 7, characterized in that, The fixing mechanism includes two limiting pins. The two ends of the front part of the base plate are rotatably mounted on the two side grille plates respectively. The lower part of the rear grille plate and the connection between the rear grille plate and the two side grille plates is provided with a clearance groove. The left and right ends of the base plate are each provided with a protrusion. The clearance groove is used to accommodate the rear part of the base plate and the two protrusions. The protrusion is provided with a first limiting hole. The lower part of each side grille plate is provided with a second limiting hole that penetrates its rear end. When the base plate is rotated to close the opening, each first limiting hole corresponds to a second limiting hole. Each limiting pin is used to pass through a first limiting hole and extend into a second limiting hole.

9. The bar screen for wastewater treatment according to claim 8, characterized in that, One end of the limiting pin is fixedly connected to a stop bar perpendicular to the limiting pin.

10. The bar screen for wastewater treatment according to claim 7, characterized in that, It also includes multiple fixing piles, and the bottom of each of the side grid plates is fixed with multiple fixing piles, and the bottom of the fixing piles has an inverted conical structure.

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