Intake float and sink filter

Abstract

A floating-sinking filtration device for water inlets includes an operating platform, a lifting boom, a filter cover, a float, a lifting device, a filling and draining device, and a control cabinet. The operating platform is horizontally fixed on the upper side of the channel slope. The lifting boom is laid on the channel slope in a front-to-back direction. The filter cover is fixedly installed at the rear end of the lifting boom. The float is fixedly installed inside the rear side of the filter cover. The lifting device is installed on the rear side of the operating platform. The front end of the lifting boom is hinged to the lifting device via a hinge shaft. The filling and draining device is connected to the float. The control cabinet is fixedly installed on the operating platform and contains a PLC control system, which is connected to the lifting device and the filling and draining device for signal control. This invention can filter the water entering the water inlet, greatly reducing the possibility of debris entering the water inlet and clogging the water plant equipment, reducing the possibility of siltation in the water inlet and culverts, and features a high degree of automation, requiring no manual cleaning, simple operation, and safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and more specifically, to a floating and sinking filter device for water inlet. Background Technology

[0002] The bottom and slopes of urban water supply channels are lined with concrete, and water inlets are built on the slopes of both banks to supply water to water plants in the cities along the channel. Although protective areas are set up on both banks of the channel, floating debris such as leaves, branches, and plastic bags still enter the channel during water transport. Moreover, under suitable climatic conditions, algae can grow in the channel water. The algae mix with the floating debris and enter the water inlets, which can cause blockages in water plant facilities or even blockages in the water inlets, affecting the domestic water supply of residents in the cities along the channel. Therefore, in order to solve the above problems, a floating and sinking filtration device for the water inlets is designed. Summary of the Invention

[0003] The purpose of this invention is to provide a floating and sinking filter device for water inlet. This invention can filter the water entering the water inlet, greatly reducing the situation where debris enters the water inlet and clogs the water plant equipment, reducing the possibility of siltation in the water inlet and culverts, and is highly automated, requiring no manual cleaning, simple to operate, safe and reliable.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The inlet-type floating filtration device includes an operating platform, a lifting boom, a filter cover, a float, a lifting device, a filling and draining device, and a control cabinet. With the water flow direction in the inlet as the forward direction and the channel length direction as the left-right direction, the operating platform is horizontally fixed to the upper side of the channel slope via a steel truss and located directly in front of the inlet. The lifting boom is laid along the channel slope in the forward-backward direction. The filter cover is open at the bottom and fixedly installed at the rear end of the lifting boom, covering the upper part of the inlet. The float is fixedly located inside the rear of the filter cover. The lifting device is installed at the rear of the operating platform. The front end of the lifting boom is hinged to the lifting device via a horizontally positioned hinge shaft in the left-right direction. The lifting device drives the hinge shaft to move up and down. The filling and draining device is located on the channel slope and connected to the float. The control cabinet is fixedly installed on the operating platform and contains a PLC control system, which is connected to the lifting device and the filling and draining device for signal control.

[0006] The lifting boom includes two swing arm beams spaced apart from each other. The swing arm beams are inclined with the front higher than the rear. A first cross support beam is fixedly connected between the middle of the two swing arm beams. A double-ear hinge support is fixedly installed at the front end of each of the two swing arm beams. The two double-ear hinge supports are respectively fixedly fitted onto the left and right ends of the hinge shaft. A ring beam is fixedly connected to the rear end of the two swing arm beams. The bottom of the ring beam is supported on the channel slope around the water inlet.

[0007] The filter cover includes a filter plate with an eggshell-shaped structure and an open bottom. The ring beam has an elliptical structure, with its major axis arranged along the front-to-back direction and its length greater than the front-to-back dimensions of the water inlet. The minor axis of the ring beam is greater than the left-to-right dimensions of the water inlet. The lower elliptical edge of the filter plate is fixedly connected to the ring beam. The float is fixedly installed at the rear end of the ring beam and located at the rear side of the filter plate.

[0008] The filling and draining device includes a filling pump, a drain pump, filling pipelines, drain pipelines, and a venting pipeline. The filling pump is fixedly installed on the channel slope on the lower rear side of the steel structure truss and is located underwater. The drain pump is fixedly installed at the bottom of the pontoon. The filling pipeline and the venting pipeline are both arranged in the front-rear direction. The outlet end of the filling pump is connected to the front end of the filling pipeline through a first flexible hose. The rear end of the filling pipeline passes through the front side of the filter plate and extends into the filter plate. The rear end of the filling pipeline is fixedly connected to the front side plate of the pontoon and is connected to the interior of the pontoon. The outlet of the drainage pump is connected to one end of the drainage pipe, and the other end of the drainage pipe extends forward and is fixedly connected to the lower side of the front plate of the float box and communicates with the outside of the float box. The front end of the vent pipe is set at the rear side of the steel structure truss and extends vertically upward to the water surface to communicate with the outside atmosphere. The rear end of the vent pipe passes through the front side of the filter plate and extends into the filter plate. The rear end of the vent pipe is fixedly connected to the front plate of the float box and communicates with the inside of the float box. The PLC control system is connected to the signal control of the water filling pump and the drainage pump respectively.

[0009] The lifting device includes two vertical frames and two electric push rods. The two vertical frames are identical in structure and symmetrically fixed to the left and right sides of the rear of the steel truss. The lower ends of the vertical frames are fixedly supported on the channel slope, and the upper ends of the vertical frames are flush with the operating platform. Two vertical rails are fixedly installed on each of the two vertical frames, spaced apart front to back. The upper ends of the two vertical rails on the left and the two vertical rails on the right are flush with each other and fixedly connected to a second horizontal support beam. Sliding slider bearing seats are vertically slidably installed between the two corresponding vertical rails. The two ends of the hinge shaft are rotatably installed on the two sliding slider bearing seats respectively. The electric push rods are vertically arranged, and the lower ends of the cylinders of the two electric push rods are fixedly installed on the middle of the upper surface of the two second horizontal support beams respectively. The piston rods of the two electric push rods extend downward and pass through the two second horizontal support beams respectively. The lower ends of the piston rods of the two electric push rods are fixedly connected to the top of the two sliding slider bearing seats respectively. The PLC control system is connected to the two electric push rods for signal control.

[0010] It also includes a flushing device, which includes a flushing pump and a flushing pipeline. The flushing pump is fixedly installed on the channel slope on the lower rear side of the steel structure truss and is located underwater. The flushing pump is located to the left of the water pump. The flushing pipeline is arranged in the front-back direction. The outlet end of the flushing pump is connected to the front end of the flushing pipeline through a second flexible hose. The rear end of the flushing pipeline passes through the front side of the filter plate and extends into the filter plate. The rear end of the flushing pipeline is sealed and fixedly connected to the front side plate of the float box. The section of the flushing pipeline inside the filter plate bends upward in an arc shape and is parallel to the filter plate. Several nozzles with front-back spacing and spraying towards the filter plate are fixedly installed on the upper side of the section of the flushing pipeline inside the filter plate. The PLC control system is connected to the flushing pump signal control.

[0011] The swing arm beam, the first crossbeam, and the ring beam are all made of stainless steel pipes, and the bottom of the ring beam is fixedly bonded with a rubber ring seat.

[0012] Both ends of the hinge shaft are equipped with torsion springs. The left torsion spring is located between the left slider bearing seat and the left double-ear hinge support, and the right torsion spring is located between the right slider bearing seat and the right double-ear hinge support.

[0013] It also includes two staircases, which are arranged symmetrically on the left and right and laid down along the channel slope in front of the operating platform. The upper ends of the two staircases are fixed to the concrete foundation on the bank of the channel slope, and the lower ends of the two staircases are integrally welded to the front side of the operating platform. The operating platform is made of welded plate material, and the steel structure truss and staircases are all made of welded steel sections. Guardrails are fixedly installed on the left side of the left staircase, the right side of the right staircase, and the left, rear, and right sides of the operating platform.

[0014] This invention possesses significant substantive features and substantial advancements compared to existing technologies. Specifically, the operating principle of this invention is as follows: Under normal operating conditions, the lifting arm of the inlet-floating filter is laid along the channel slope in the front-to-back direction. The filter cover covers the upper part of the inlet, and the rubber ring seat fits against the channel slope around the inlet. The hinge shaft is underwater and located at the bottom of the vertical frame. The filter plate just covers the inlet, thus filtering the water entering the inlet and intercepting floating debris such as algae, leaves, branches, and plastic bags outside the inlet. This greatly reduces the likelihood of floating debris entering the inlet and clogging water treatment facilities, and lowers the possibility of siltation at the inlet and culverts. The filter plate has an eggshell-shaped structure, which increases the water flow area and prevents water intake flow from being obstructed. The eggshell-shaped surface has a certain guiding capacity for water flow, which can effectively reduce water resistance. Moreover, the impurities in the water are not easily attached to the surface of the filter plate, ensuring that the filter plate can operate for a long time. After the inlet floating filter device has been running for a long time, the surface of the filter plate will be covered with some floating debris, which will affect the water flow capacity of the filter plate and reduce the water flow of the inlet. Then, the worker goes down to the operating platform through the ladder to operate the PLC control system to start the flushing pump. Or, under normal circumstances, the PLC control system controls the flushing pump to start according to the set timer. The flushing pump pumps high-pressure water into the flushing pipeline, so that the high-pressure water sprays towards the filter plate through the nozzles on the flushing pipeline to wash away the floating debris attached to the surface of the filter plate and restore the water flow capacity of the filter plate.

[0015] When the filter plate needs to be floated for maintenance or replacement, workers descend to the operating platform via a ladder and operate the PLC control system to start the drainage pump. The drainage pump drains the water in the float box through the drainage pipe. The float box is connected to the outside atmosphere through the vent pipe, and air is then introduced into the float box. The buoyancy of the float box gradually increases. When the sum of the buoyancy of the float box, ring beam, filter plate, and lifting boom is greater than the sum of the weight of the float box, ring beam, filter plate, and lifting boom, the float box will float up and drive the ring beam and lifting boom to rotate upward around the hinge axis and out of the water. When the lifting boom rotates, it drives the hinge axis to rotate clockwise in the two slider bearing seats. The drainage pump is then turned off. Then, the PLC control system simultaneously starts two electric push rods. The piston rods of the two electric push rods retract upward synchronously. The piston rods of the two electric push rods drive the corresponding slider bearing seats to move upward, which in turn drives the hinge axis to move upward out of the water, so that the ring beam, filter plate, and lifting boom float horizontally on the water. Workers then take a boat to the filter plate to inspect or replace it.

[0016] When the filter plate needs to be repaired or replaced and the inlet needs to be covered, workers descend the ladder to the operating platform and operate the PLC control system to first activate two electric actuators. The piston rods of both actuators extend downwards simultaneously, driving the corresponding slider bearing seats downwards, pushing the hinge shaft down to the preset position at the bottom of the vertical frame. Then, the water pump is activated, filling the float tank with water through the filling pipeline. Air inside the float tank is discharged to the outside atmosphere through the venting pipeline. The sum of the weights of the float tank, ring beam, filter plate, and lifting boom exceeds the sum of their buoyancy, causing the ring beam, filter plate, and float tank to sink. The lifting boom rotates downwards around the hinge shaft to the channel slope. When the lifting boom rotates, it drives the hinge shaft to rotate counterclockwise in the two slider bearing seats. When the rubber ring seat is in contact with the channel slope around the water inlet, the filter plate just covers the upper part of the water inlet. The filter plate then continues to filter the water entering the water inlet. Both ends of the hinge shaft are equipped with torsion springs. The torsion springs rotate together with the hinge shaft when it rotates, thereby slowing down the falling speed of the ring beam, filter plate and float box, preventing the ring beam from hitting the channel slope at a large speed. Furthermore, the rubber ring seat at the bottom of the ring beam can further buffer the impact force of the ring beam on the channel slope, preventing the ring beam from breaking the channel slope.

[0017] The swing arm beam, the first crossbeam, and the ring beam are all made of stainless steel pipes, which can increase their buoyancy in the water to offset part of the weight, thus reducing the manufacturing volume of the pontoon.

[0018] In summary, this invention can filter the water entering the intake, greatly reducing the possibility of debris entering the intake and clogging the water plant equipment, lowering the likelihood of siltation in the intake and culverts, and is highly automated, requiring no manual cleaning, simple to operate, and safe and reliable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the filter plate cover of the present invention when it is used to filter and trap floats on the upper part of the water inlet.

[0020] Figure 2 yes Figure 1 The main view.

[0021] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0022] Figure 4 This is a schematic diagram of the structure of the filter plate of the present invention when it rotates out of the water surface.

[0023] Figure 5 yes Figure 1 Enlarged view of section B in the middle.

[0024] Figure 6 yes Figure 1Enlarged view of a section at point C.

[0025] Figure 7 yes Figure 3 Enlarged view of a section at point D. Detailed Implementation

[0026] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0027] like Figure 1-7 As shown, the inlet-floating filtration device includes an operating platform 1, a lifting boom, a filter cover, a float box 2, a lifting device, a filling and draining device, and a control cabinet 3. With the water flow direction in the inlet 30 as the forward direction and the length of the channel as the left-right direction, the operating platform 1 is horizontally fixed to the upper side of the channel slope 31 via a steel truss 4 and is located directly in front of and above the inlet 30. The lifting boom is laid along the slope of the channel slope 31 in the front-back direction. The filter cover has an open lower side and is fixedly installed at the rear end of the lifting boom. It covers the upper part of the water inlet 30. The float box 2 is fixedly installed inside the rear part of the filter cover. The lifting device is installed on the rear side of the operating platform 1. The front end of the lifting arm is hinged to the lifting device through a hinge shaft 29 set horizontally in the left and right direction. The lifting device drives the hinge shaft 29 to move up and down. The filling and draining device is set on the channel slope 31 and connected to the float box 2. The control cabinet 3 is fixedly installed on the operating platform 1. The control cabinet 3 is equipped with a PLC control system (not shown in the figure). The PLC control system is connected to the signal control of the lifting device and the filling and draining device respectively.

[0028] The lifting boom includes two swing arm beams 5 spaced apart from each other. The swing arm beams 5 are inclined with the front higher than the rear. A first horizontal support beam 6 is fixedly connected between the middle of the two swing arm beams 5. A double-eared hinge support 7 is fixedly installed at the front end of each of the two swing arm beams 5. The two double-eared hinge supports 7 are respectively fixedly fitted on the left and right ends of the hinge shaft 29. A ring beam 8 is fixedly connected to the rear end of the two swing arm beams 5. The bottom of the ring beam 8 is supported on the channel slope 31 around the water inlet 30.

[0029] The filter cover includes a filter plate 9, which has an eggshell-shaped structure and an open bottom. The ring beam 8 has an elliptical structure. The major axis of the ring beam 8 is set along the front-to-back direction and its length is greater than the front-to-back dimensions of the water inlet 30. The minor axis of the ring beam 8 is greater than the left-to-right dimensions of the water inlet 30. The lower elliptical edge of the filter plate 9 is fixedly connected to the ring beam 8. The float box 2 is fixedly installed at the rear end of the ring beam 8 and located at the rear side of the filter plate 9.

[0030] The filling and draining device includes a filling pump 10, a drain pump 11, a filling pipeline 12, a drain pipeline 13, and a venting pipeline 14. The filling pump 10 is fixedly installed on the channel slope 31 on the lower rear side of the steel structure truss 4 and is located underwater. The drain pump 11 is fixedly installed at the bottom of the float box 2. The filling pipeline 12 and the venting pipeline 14 are both arranged in the front-rear direction. The outlet end of the filling pump 10 is connected to the front end of the filling pipeline 12 through a first flexible hose 27. The rear end of the filling pipeline 12 passes through the front side of the filter plate 9 and extends into the filter plate 9. The rear end of the filling pipeline 12 is fixedly connected to the front side plate of the float box 2 and... The interior of the float box 2 is interconnected. The outlet of the drainage pump 11 is connected to one end of the drainage pipe 13. The other end of the drainage pipe 13 extends forward and is fixedly connected to the lower part of the front side plate of the float box 2 and communicates with the outside of the float box 2. The front end of the vent pipe 14 is located on the rear side of the steel structure truss 4 and extends vertically upward to the water surface and communicate with the outside atmosphere. The rear end of the vent pipe 14 passes through the front side of the filter plate 9 and extends into the filter plate 9. The rear end of the vent pipe 14 is fixedly connected to the front side plate of the float box 2 and communicates with the interior of the float box 2. The PLC control system is connected to the water filling pump 10 and the drainage pump 11 for signal control.

[0031] The lifting device includes two vertical frames 15 and two electric push rods 16. The two vertical frames 15 are identical in structure and symmetrically fixed to the rear left and right sides of the steel truss 4. The lower ends of the vertical frames 15 are fixedly supported on the channel slope 31, and the upper ends of the vertical frames 15 are flush with the operating platform 1. Two vertical rails 17 are fixedly installed on each of the two vertical frames 15, spaced apart front to back. The upper ends of the two vertical rails 17 on the left and the two vertical rails 17 on the right are flush with each other and fixedly connected to a second horizontal support beam 18. A slider bearing seat 19 is vertically slidably installed between the vertical rails 17. The two ends of the hinge shaft 29 are rotatably installed on the two slider bearing seats 19 respectively. The electric push rods 16 are vertically installed. The lower ends of the cylinders of the two electric push rods 16 are respectively fixedly installed on the middle of the upper surface of the two second horizontal support beams 18. The piston rods of the two electric push rods 16 extend downward and pass through the two second horizontal support beams 18 respectively. The lower ends of the piston rods of the two electric push rods 16 are respectively fixedly connected to the top of the two slider bearing seats 19. The PLC control system is connected to the two electric push rods 16 for signal control.

[0032] It also includes a flushing device, which includes a flushing pump 20 and a flushing pipeline 21. The flushing pump 20 is fixedly installed on the channel slope 31 on the lower rear side of the steel structure truss 4 and is located underwater. The flushing pump 20 is located to the left of the water filling pump 10. The flushing pipeline 21 is arranged in the front-back direction. The outlet end of the flushing pump 20 is connected to the front end of the flushing pipeline 21 through a second hose 28. The rear end of the flushing pipeline 21 passes through the front side of the filter plate 9 and extends into the filter plate 9. The rear end of the flushing pipeline 21 is sealed and fixedly connected to the front side plate of the float box 2. The section of the flushing pipeline 21 located in the filter plate 9 is bent upward in an arc shape and parallel to the filter plate 9. Several nozzles 22 with front-back intervals and spraying towards the filter plate 9 are fixedly installed on the upper side of the section of the flushing pipeline 21 located in the filter plate 9. The PLC control system is connected to the flushing pump 20 for signal control.

[0033] The swing arm beam 5, the first transverse support beam 6, and the ring beam 8 are all made of stainless steel pipes, and the bottom of the ring beam 8 is fixedly bonded with a rubber ring seat 23.

[0034] Both ends of the hinge shaft 29 are equipped with torsion springs 24. The left torsion spring 24 is located between the left slider bearing seat 19 and the left double-ear hinge support 7, and the right torsion spring 24 is located between the right slider bearing seat 19 and the right double-ear hinge support 7.

[0035] It also includes two staircases 25, which are arranged symmetrically on the left and right and laid down along the channel slope 31 in front of the operating platform 1. The upper ends of the two staircases 25 are fixed to the concrete foundation on the bank of the channel slope 31, and the lower ends of the two staircases 25 are integrally welded to the front side of the operating platform 1. The operating platform 1 is made of welded plate material, and the steel structure truss 4 and the staircases 25 are both made of welded steel sections. Guardrails 26 are fixedly installed on the left side of the left staircase 25, the right side of the right staircase 25, and the left, rear, and right sides of the operating platform 1.

[0036] The PLC control system, water pump 10, drainage pump 11, electric push rod 16, flushing pump 20 and torsion spring 24 are all conventional technologies, and their specific structures and working principles will not be described in detail. The automatic control part in this invention is a conventional technology and does not involve new computer programs.

[0037] The operating principle of this invention is as follows: Under normal operating conditions, the lifting arm of the inlet-floating filter is laid on the channel slope 31 along the front-to-back direction. The filter cover covers the upper part of the inlet 30, the rubber ring seat 23 fits against the channel slope 31 around the inlet 30, the hinge shaft 29 is underwater and located at the bottom of the vertical frame 15, and the filter plate 9 just covers the inlet 30. The filter plate 9 filters the water entering the inlet 30, intercepting floating debris such as algae, leaves, branches, and plastic bags outside the inlet 30, greatly reducing the possibility of floating debris entering the inlet 30 and clogging the water plant facilities, and reducing the possibility of siltation of the inlet 30 and the culvert. The filter plate 9 has an eggshell-shaped structure, which can increase the water flow area and avoid loss of water intake flow from the inlet 30. At the same time, the eggshell shape faces The water flow has a certain guiding capacity, which can effectively reduce water resistance. Moreover, the impurities in the water are not easily attached to the surface of the filter plate 9, ensuring that the filter plate 9 can operate for a long time. After the inlet floating filter device has been running for a long time, the surface of the filter plate 9 will be covered with a certain amount of floating debris, which will affect the water flow capacity of the filter plate 9 and reduce the water flow of the inlet 30. Then, the worker goes down to the operating platform 1 through the step ladder 25 to operate the PLC control system to start the flushing pump 20. Or, under normal circumstances, the PLC control system controls the flushing pump 20 to start according to the set timer. The flushing pump 20 pumps high-pressure water into the flushing pipe 21, so that the high-pressure water sprays towards the filter plate 9 through the nozzles 22 on the flushing pipe 21 to wash away the floating debris attached to the surface of the filter plate 9 and restore the water flow capacity of the filter plate 9.

[0038] When the filter plate 9 needs to be floated for maintenance or replacement, workers descend to the operating platform 1 via the ladder 25 and operate the PLC control system to start the drainage pump 11. The drainage pump 11 discharges the water in the float box 2 through the drainage pipe 13. The float box 2 is connected to the outside atmosphere through the ventilation pipe 14, and air is then introduced into the float box 2. The buoyancy of the float box 2 gradually increases. When the sum of the buoyancy of the float box 2, the ring beam 8, the filter plate 9, and the lifting boom is greater than the sum of the weights of the float box 2, the ring beam 8, the filter plate 9, and the lifting boom, the float box 2 will float up and drive the ring beam 8 and the lifting boom to rotate. The hinge shaft 29 rotates upwards out of the water. When the lifting boom rotates, it drives the hinge shaft 29 to rotate clockwise in the two slider bearing seats 19. The drain pump 11 is turned off. Then, the two electric push rods 16 are started simultaneously through the PLC control system. The piston rods of the two electric push rods 16 retract upwards in sync. The piston rods of the two electric push rods 16 drive the corresponding slider bearing seats 19 to move upwards, which in turn drives the hinge shaft 29 to move upwards out of the water, so that the ring beam 8, the filter plate 9 and the lifting boom float horizontally on the water. The workers then take a boat to the filter plate 9 to inspect or replace the filter plate 9.

[0039] When the filter plate 9 is repaired or replaced and the inlet 30 needs to be covered, the worker descends to the operating platform 1 via the ladder 25 and operates the PLC control system to first activate the two electric push rods 16. The piston rods of the two electric push rods 16 extend downwards simultaneously and drive the corresponding slider bearing seats 19 downwards, pushing the hinge shaft 29 downwards to the preset position at the bottom of the vertical frame 15. Then, the water pump 10 is activated, and the water pump 10 fills the float box 2 with water through the water filling pipe 12. The air in the float box 2 is discharged to the outside atmosphere through the ventilation pipe 14. Then, the sum of the weights of the float box 2, the ring beam 8, the filter plate 9, and the lifting boom is greater than the sum of the buoyancy of the float box 2, the ring beam 8, the filter plate 9, and the lifting boom. The ring beam 8, the filter plate 9, and the float box 2 will then sink, and the lifting boom will... The frame rotates downward around the hinge shaft 29 onto the channel slope 31. When the lifting arm rotates, it drives the hinge shaft 29 to rotate counterclockwise in the two slider bearing seats 19. When the rubber ring seat 23 is in contact with the channel slope 31 around the water inlet 30, the filter plate 9 just covers the upper part of the water inlet 30. The filter plate 9 then continues to filter the water entering the water inlet 30. Both ends of the hinge shaft 29 are equipped with torsion springs 24. The torsion springs 24 rotate together with the hinge shaft 29, thereby slowing down the falling speed of the ring beam 8, the filter plate 9 and the float box 2, preventing the ring beam 8 from hitting the channel slope 31 at a large speed. Furthermore, the rubber ring seat 23 at the bottom of the ring beam 8 can further buffer the impact force of the ring beam 8 on the channel slope 31, preventing the ring beam 8 from breaking the channel slope 31.

[0040] The swing arm beam 5, the first cross support beam 6, and the ring beam 8 are all made of stainless steel pipes, which can increase their buoyancy in the water to offset part of the weight, thus reducing the manufacturing volume of the float box 2.

[0041] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A draft tube float and sink filter apparatus, characterized by: The system includes an operating platform, a lifting boom, a filter cover, a float, a lifting device, a filling and draining device, and a control cabinet. With the water flow direction from the inlet as the forward direction and the channel length direction as the left-right direction, the operating platform is horizontally fixed to the upper side of the channel slope via a steel truss and is located directly in front of the inlet. The lifting boom is laid along the channel slope in the forward-backward direction. The filter cover has an open lower side and is fixedly installed at the rear end of the lifting boom, covering the upper part of the inlet. The float is fixedly located inside the rear side of the filter cover. The lifting device is installed at the rear of the operating platform. The front end of the lifting boom is hinged to the lifting device via a horizontally positioned hinge shaft in the left-right direction. The lifting device drives the hinge shaft to move up and down. The filling and draining device is located on the channel slope and connected to the float. The control cabinet is fixedly installed on the operating platform and contains a PLC control system, which is connected to the lifting device and the filling and draining device via signal control. The lifting boom includes two swing arm beams spaced apart from each other. The swing arm beams are inclined with the front higher than the rear. A first cross support beam is fixedly connected between the middle of the two swing arm beams. A double-ear hinge support is fixedly installed at the front end of each of the two swing arm beams. The two double-ear hinge supports are respectively fixedly fitted on the left and right ends of the hinge shaft. A ring beam is fixedly connected to the rear end of the two swing arm beams. The bottom of the ring beam is supported on the channel slope around the water inlet. The filter cover includes a filter plate with an eggshell-shaped structure and an open bottom. The ring beam has an elliptical structure. The major axis of the ring beam is set along the front-to-back direction and its length is greater than the front-to-back dimensions of the water inlet. The minor axis of the ring beam is greater than the left-to-right dimensions of the water inlet. The lower elliptical edge of the filter plate is fixedly connected to the ring beam. The float is fixedly installed at the rear end of the ring beam and located at the rear part of the filter plate. The filling and draining device includes a filling pump, a drain pump, filling pipelines, drain pipelines, and a venting pipeline. The filling pump is fixedly installed on the channel slope on the lower rear side of the steel structure truss and is located underwater. The drain pump is fixedly installed at the bottom of the pontoon. The filling pipeline and the venting pipeline are both arranged in the front-rear direction. The outlet end of the filling pump is connected to the front end of the filling pipeline through a first flexible hose. The rear end of the filling pipeline passes through the front side of the filter plate and extends into the filter plate. The rear end of the filling pipeline is fixedly connected to the front side plate of the pontoon and is connected to the interior of the pontoon. The outlet of the drainage pump is connected to one end of the drainage pipe, and the other end of the drainage pipe extends forward and is fixedly connected to the lower side of the front plate of the float box and communicates with the outside of the float box. The front end of the vent pipe is set on the rear side of the steel structure truss and extends vertically upward to the water surface and communicate with the outside atmosphere. The rear end of the vent pipe passes through the front side of the filter plate and extends into the filter plate. The rear end of the vent pipe is fixedly connected to the front plate of the float box and communicates with the inside of the float box. The PLC control system is connected to the signal control of the water filling pump and the drainage pump respectively. The lifting device includes two vertical frames and two electric push rods. The two vertical frames are identical in structure and symmetrically fixed to the left and right sides of the rear of the steel truss. The lower ends of the vertical frames are fixedly supported on the channel slope, and the upper ends of the vertical frames are flush with the operating platform. Two vertical rails are fixedly installed on each of the two vertical frames, spaced apart front to back. The upper ends of the two vertical rails on the left and the two vertical rails on the right are flush with each other and fixedly connected to a second horizontal support beam. Sliding slider bearing seats are vertically slidably installed between the two corresponding vertical rails. The two ends of the hinge shaft are rotatably installed on the two sliding slider bearing seats respectively. The electric push rods are vertically arranged, and the lower ends of the cylinders of the two electric push rods are fixedly installed on the middle of the upper surface of the two second horizontal support beams respectively. The piston rods of the two electric push rods extend downward and pass through the two second horizontal support beams respectively. The lower ends of the piston rods of the two electric push rods are fixedly connected to the top of the two sliding slider bearing seats respectively. The PLC control system is connected to the two electric push rods for signal control.

2. The draft tube buoyancy-actuated filter apparatus of claim 1, wherein: It also includes a flushing device, which includes a flushing pump and a flushing pipeline. The flushing pump is fixedly installed on the channel slope on the lower rear side of the steel structure truss and is located underwater. The flushing pump is located to the left of the water pump. The flushing pipeline is arranged in the front-back direction. The outlet end of the flushing pump is connected to the front end of the flushing pipeline through a second flexible hose. The rear end of the flushing pipeline passes through the front side of the filter plate and extends into the filter plate. The rear end of the flushing pipeline is sealed and fixedly connected to the front side plate of the float box. The section of the flushing pipeline inside the filter plate bends upward in an arc shape and is parallel to the filter plate. Several nozzles with front-back spacing and spraying towards the filter plate are fixedly installed on the upper side of the section of the flushing pipeline inside the filter plate. The PLC control system is connected to the flushing pump signal control.

3. The draft tube buoyancy-affected straining device of claim 1, wherein: The swing arm beam, the first crossbeam, and the ring beam are all made of stainless steel pipes, and the bottom of the ring beam is fixedly bonded with a rubber ring seat.

4. The draft tube buoyancy-affected straining device of claim 1, wherein: Both ends of the hinge shaft are equipped with torsion springs. The left torsion spring is located between the left slider bearing seat and the left double-ear hinge support, while the right torsion spring is located between the right slider bearing seat and the right double-ear hinge support.

5. The inlet-floating / sinking filter device according to any one of claims 1-4, characterized in that: It also includes two staircases, which are arranged symmetrically on the left and right and laid down along the channel slope in front of the operating platform. The upper ends of the two staircases are fixed to the concrete foundation on the bank of the channel slope, and the lower ends of the two staircases are integrally welded to the front side of the operating platform. The operating platform is made of welded plate material, and the steel structure truss and staircases are all made of welded steel sections. Guardrails are fixedly installed on the left side of the left staircase, the right side of the right staircase, and the left, rear, and right sides of the operating platform.

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