Medium filter based on hydraulic self-driven backwashing

Abstract

The invention relates to a medium filter based on hydraulic self-driven backwashing, relates to the technical field of medium filters, solves the problem of hardening of a medium filter layer and eliminates the technical problem that impurities are adsorbed on the inner wall of an outlet pipe in the backwashing process, and comprises a first tank body, a second tank body, a water distribution tank and a water seal tank, filter chamber top plates, filter plates and supporting plates are connected in the first tank body and the second tank body, outlet pipes are connected to the tops of the first tank body and the second tank body, inlet pipes are connected to one sides of the first tank body and the second tank body, first rotating shafts are rotatably connected to the interiors of the inlet pipes, driving blades are connected to the first rotating shafts, and second rotating shafts are rotatably connected to the interiors of the outlet pipes; by driving the driving blades and the flow guide plate to rotate, falling sewage slides to the periphery through the flow guide plate, the situation that the sewage directly and vertically impacts the middle position of the medium filter layer downwards is avoided, and the collapse phenomenon that the periphery is high and the middle is low is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of media filters, in particular to a media filter based on hydraulic self-driven backwashing. Background Art

[0002] A filter is a device or technology that purifies fluids by trapping suspended particles, impurities, or harmful substances in them through physical or chemical means. Its core principle is to use porous media or specific materials to block target substances while allowing fluids to pass through.

[0003] As the core unit of a water treatment system, media filters remove suspended solids (SS), colloids, and some organic pollutants from water through the physical interception and adsorption of filter media (such as quartz sand, anthracite, and activated carbon). Their performance and stability directly impact the operational efficiency of industrial circulating water, municipal wastewater advanced treatment, and reclaimed water reuse systems. Their automatic backwash function significantly reduces maintenance requirements.

[0004] For media filters, when sewage is continuously placed into the tank, it falls directly through the pipe and contacts the medium. When it is flushed by water for a long time, the filter layer will collapse with high edges and low middle, thereby reducing the filtration efficiency.

[0005] In addition, when sewage is discharged into the medium filter layer for a long time, the continuous impact of sewage will cause the top of the medium filter layer to be subjected to continuous downward pressure, causing the medium filter layer to become compacted and agglomerated, which not only affects the filtration efficiency of sewage, but also makes it impossible to effectively complete subsequent backwashing.

[0006] In addition, during backwashing, the clean water entering from the bottom of the medium filter layer moves upward, causing the debris on the top of the medium filter layer to enter the outlet pipe with the water flow. During this process, the carried debris will be adsorbed on the inner wall of the outlet pipe, making some debris unable to be discharged; when the sewage is subsequently filtered (water flows downward), these debris will fall off from the outlet pipe and deposit on the medium filter layer again, affecting the backwashing effect.

[0007] On this basis, the present invention provides a media filter based on hydraulic self-driven backwashing to solve the above problems. Summary of the Invention

[0008] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a media filter based on hydraulic self-driven backwashing. The present invention has a novel structure and ingenious conception, which effectively solves the problem of compaction of the media filter layer and eliminates the technical problem of impurities adsorbed on the inner wall of the outlet pipe during the backwashing process.

[0009] A media filter based on hydraulic self-driven backwashing, comprising a first tank body, a second tank body, a water distribution tank and a water seal box, wherein a filter chamber top plate, a filter plate and a support plate are fixedly connected to the first tank body and the second tank body, the support plate is located above the filter chamber top plate, and the filter plate is located below the filter chamber top plate, outlet pipes are fixedly connected to the top of the first tank body and the second tank body, the bottom ends of the two outlet pipes pass through the filter chamber top plate and are located below the filter chamber top plate, inlet pipes are fixedly connected to one side of the first tank body and the second tank body, the two inlet pipes are respectively located above the two filter chamber top plates, and one end of the two inlet pipes is respectively connected to the two outlet pipes; A first support frame is fixedly connected to the inlet pipe, a first rotating shaft is rotatably connected to the first support frame, a driving blade is fixedly connected to the first rotating shaft, two second support frames are fixedly connected to the outlet pipe, the two second support frames are rotatably connected to the second rotating shaft, a plurality of cleaning components are fixedly connected to the second rotating shaft, the cleaning components include a scraper, the scraper is in contact with the inner wall of the outlet pipe, two rotatable guide plates are provided below the second rotating shaft, and the two guide plates are located below the outlet pipe.

[0010] Preferably, a protective shell is fixedly connected to the outlet pipe, one end of the first rotating shaft passes through the protective shell and is located in the protective shell, the first rotating shaft is fixedly connected to the first bevel gear at one end located in the protective shell, the second rotating shaft passes through the protective shell, the second rotating shaft is fixedly connected to the second bevel gear, the second bevel gear is located in the protective shell, the first bevel gear is meshed with the second bevel gear, the bottom end of the second rotating shaft is fixedly connected to two connecting rods, the two guide plates are respectively fixedly connected to the bottom ends of the two connecting rods, and the tops of the two guide plates are provided with guide grooves.

[0011] Preferably, the cleaning assembly includes a support block, which is fixedly connected to one side of the second rotating shaft, and a sliding groove is provided on the side of the support block away from the second rotating shaft, a slider is slidably connected in the sliding groove, the scraper is fixedly connected to one side of the slider, a tension spring is provided between the slider and one side of the sliding groove, the bottom of the slider is fixedly connected to a support rod, and the other end of the support rod is fixedly connected to a push plate.

[0012] Preferably, two mounting plates are fixedly connected to each of the first tank body and the second tank body, and the two mounting plates are both located between the filter chamber top plate and the filter plate. The mounting plate is annular, and a first placement plate and multiple second placement plates are provided on the top of the mounting plate. Insertion plates are fixedly connected to both sides of the first placement plate, and insertion holes are provided on multiple second placement plates. Multiple second placement plates are installed on both sides of the first placement plate through the insertion holes. The first placement plate and the second placement plate cooperate to form a circle, and four limiting grooves are provided on the circular plate formed by the first placement plate and the second placement plate.

[0013] Preferably, the filter chamber is located between the filter chamber top plate and the filter plate, the first water purification chamber is located below the filter plate, the second water purification chamber is located between the filter chamber top plate and the support plate, and the drainage chamber is located above the support plate. Four connecting pipes are fixedly connected between the filter chamber top plate and the filter plate, the upper ends of the four connecting pipes are all located in the second water purification chamber, and the bottom ends of the four connecting pipes are all located in the first water purification chamber.

[0014] Preferably, the support plate is annular, and an annular weir plate is fixedly connected to the top of the support plate. The weir plate cooperates with the inner wall of the first tank body to form an annular water collecting trough. A V-shaped opening is provided on the top of the weir plate. One side of the first tank body and the second tank body are both fixedly connected with a water outlet, and the water outlet is communicated with the annular water collecting trough formed by the weir plate and the inner wall of the first tank body.

[0015] Preferably, a ladder is fixedly connected to one side of the first tank body and the second tank body, a guardrail is fixedly connected to the top of the first tank body and the second tank body, a first manhole is provided on the top of the first tank body and the second tank body, and the first manhole is connected to the drainage chamber. A second manhole and a third manhole are provided on one side of the first tank body and the second tank body, and the second manhole is connected to the filter chamber, and the third manhole is connected to the first water purification chamber.

[0016] Preferably, the tops of the first tank body and the second tank body are fixedly connected to a support base, the top of the support base is fixedly connected to a water distribution tank, the bottoms of the water distribution tanks are fixedly connected to U-shaped water inlet pipes, the other ends of the two U-shaped water inlet pipes are respectively connected to the inlet pipes on the first tank body and the second tank body, the first tank body and the second tank body are connected through a balancing pipe, and the two ends of the balancing pipe are respectively located in the second water purification chambers of the first tank body and the second tank body.

[0017] Preferably, the other ends of the two outlet pipes are fixedly connected to the water outlet pipe, and the other ends of the two water outlet pipes are connected to the water seal box. The two outlet pipes are fixedly connected to the siphon auxiliary pipe, and the other ends of the two siphon auxiliary pipes pass through the first tank body and the second tank body respectively and are fixedly connected to the siphon breaking bucket, and the two siphon breaking buckets are respectively located in the second clean water chamber of the first tank body and the second tank body, and one side of the two siphon auxiliary pipes is fixedly connected to the siphon down pipe, and the other ends of the two siphon down pipes are connected to the water seal box.

[0018] Preferably, a cylinder is fixedly connected to the outlet pipe, and the cylinder is located in the second water purification chamber. A partition is fixedly connected to the cylinder, and the cylinder is divided into a first cavity and a second cavity by the partition. A negative pressure tube is fixedly connected to the partition, one end of the negative pressure tube is located in the first cavity, and the other end of the negative pressure tube is located in the second cavity. A piston is provided in the negative pressure tube, and a first pull rope is fixedly connected to one side of the piston, and the other end of the first pull rope passes through the cylinder and is connected to the top of the siphon breaking bucket, and a second pull rope is fixedly connected to the other side of the piston, and the other end of the second pull rope passes through the cylinder and is connected to a buoyancy ball, and the buoyancy ball is located in the outlet pipe.

[0019] The present invention has the following technical effects.

[0020] 1. The present invention uses the first rotating shaft, driving blades, guide plates and guide grooves to drive the driving blades and guide plates to rotate in response to the sewage discharged from the outlet pipe, so that the falling sewage slides to the surrounding areas through the guide plates, avoiding the sewage directly impacting the middle position of the medium filter layer vertically downward, and preventing the medium from collapsing with high sides and low middle.

[0021] 2. The present invention separates the placed media through the support plate, the first placement plate, the insertion plate and the second placement plate, thereby effectively slowing down the compaction of the medium filter layer when used for a long time, and placing the medium filter layer in layers, which can effectively prevent the filter layer from compacting during backwashing; through the scraper, when the backwash sewage flows through the outlet pipe, the impurities adsorbed on the inner wall of the outlet pipe are cleaned, so that the impurities carried by the sewage can be discharged smoothly, avoiding the impurities falling again and landing on the top of the filter layer after backwashing.

[0022] 3. The present invention facilitates the filtration of the sewage by means of the filter layer top plate, filter plate, connecting pipe and weir plate. As the purified water level continues to rise, the purified water gradually rises in the tank body and is discharged from the water outlet through the weir plate. No external power is required, and the sewage purification process can be completed by relying on the system's own hydraulic conditions (such as sewage inlet head, gravity filtration and overflow).

[0023] 4. The present invention solves the problem of gradual accumulation of impurities on the top of the filter layer affecting filtration efficiency during long-term sewage purification by using a siphon auxiliary pipe, a siphon breaking bucket and a siphon downpipe. By forming a siphon effect to suck sewage and impurities above the filter chamber, the impurities on the top of the filter layer are driven to rise into the outlet pipe for discharge, thereby achieving the cleaning of impurities on the top of the filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1It is a schematic diagram of the overall assembly structure of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the first tank body, the second tank body, the filter chamber top plate and the filter plate in the present invention; Figure 3 This is a schematic diagram of the assembly structure of the first tank body, the second tank body, the outlet pipe and the water outlet pipe in the present invention; Figure 4 This is a schematic diagram of the assembly structure of the first water purification chamber, the filter chamber and the second water purification chamber in the present invention; Figure 5 This is a schematic diagram of the assembly structure of the first tank body, the second tank body, the inlet pipe, the outlet pipe, and the siphon breaking bucket in the present invention; Figure 6 This is a schematic diagram of the assembly structure of the U-shaped water inlet pipe, inlet pipe, outlet pipe and cylinder in the present invention; Figure 7 It is a schematic structural diagram of the assembly of the first rotating shaft, the second rotating shaft, the guide plate and the cleaning component in the present invention; Figure 8 This invention Figure 7 A schematic diagram of the enlarged structure of the middle part A; Figure 9 This is a schematic diagram of the assembly structure of the first rotating shaft, the second rotating shaft, the first bevel gear and the second bevel gear in the present invention; Figure 10 This is a schematic diagram of the assembly structure of the mounting plate, the first placement plate, and the limiting groove in the present invention; Figure 11 It is a schematic diagram of the assembly structure of the mounting plate and the first placement plate in the present invention; Figure 12 This is a schematic diagram of the exploded structure of the mounting plate, the first placement plate, the insertion plate, and the second placement plate in the present invention; Figure 13 It is a schematic diagram of the support plate and weir plate structure of the present invention; Figure 14 It is a schematic diagram of the assembly structure of the cylinder, partition, negative pressure tube and piston in the present invention.

[0025] Figure 1: 1-first tank body; 2-second tank body; 3-ladder; 4-guardrail; 5-first manhole; 6-second manhole; 7-third manhole; 8-filter chamber top plate; 9-filter plate; 10-connecting pipe; 11-first water purification chamber; 12-filter chamber; 13-second water purification chamber; 14-drainage chamber; 15-mounting plate; 16-first placement plate; 17-insertion plate; 18-second placement plate; 19-insertion hole; 20-limiting groove; 21-balancing pipe; 22-U-shaped water inlet pipe; 23-support base; 24-water distribution box; 25-water outlet pipe; 26-siphon auxiliary pipe; 27-siphon breaking bucket; 28-siphon downpipe; 29-water seal box; 30-outlet pipe; 31-support plate; 32- Weir plate; 33-V-shaped mouth; 34-water outlet; 35-inlet pipe; 36-first support frame; 37-first rotating shaft; 38-drive blade; 39-protective shell; 40-first bevel gear; 41-second rotating shaft; 42-second support frame; 43-second bevel gear; 44-cleaning assembly; 441-support block; 442-chute; 443-slider; 444-scraper; 445-tension spring; 446-support rod; 447-push plate; 45-connecting rod; 46-guide plate; 47-guide groove; 48-cylinder; 49-partition; 50-first cavity; 51-second cavity; 52-negative pressure tube; 53-piston; 54-first pull rope; 55-second pull rope; 56-buoyancy ball. DETAILED DESCRIPTION

[0026] The above and other technical contents, features and effects of the present invention are described below with reference to the attached Figures 1 to 14 The details of the embodiments will be clearly presented. The contents mentioned in the following embodiments are all based on the accompanying drawings.

[0027] Various exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] The present invention is a media filter based on hydraulic self-driven backwashing. In existing media filters, when sewage is continuously put into the tank, the sewage flushes the media filter layer for a long time, causing the filter layer to collapse with high sides and low center. At the same time, the long-term impact of sewage on the filter layer will also cause the top of the medium filter layer to be subjected to continuous downward pressure, causing the medium filter layer to become compacted and agglomerated. In addition, during backwashing, the debris carried by the flushing water will be adsorbed on the inner wall of the outlet pipe, and after backwashing, it will fall off from the outlet pipe and be deposited on the medium filter layer again.

[0029] As an embodiment, the present invention includes a first tank body 1, a second tank body 2, a water distribution box 24 and a water seal box 29. The first tank body 1 and the second tank body 2 are fixedly connected with a filter chamber top plate 8, a filter plate 9 and a support plate 31. The filter chamber top plate 8 and the filter plate 9 are both circular and fixed to the inner wall of the tank body. They cooperate with the tank body to form a space for sewage filtration. The medium for filtering is placed on the top of the filter plate 9. A plurality of circular holes are opened on the filter plate 9 to provide support for the placed medium. The support plate 31 is located above the filter chamber top plate 8, and the filter plate 9 is located below the filter chamber top plate 8. The tops of the first tank body 1 and the second tank body 2 are fixedly connected with outlet pipes 30. The two outlet pipes 30 are respectively located vertically in the first tank body 1. and the second tank body 2, in an inverted U shape, the top of which is respectively located above the top of the first tank body 1 and the second tank body 2 and extends above the guardrail 4 and then turns back downward, the bottom ends of the two outlet pipes 30 both pass through the filter chamber top plate 8 and are located between the filter chamber top plate 8 and the filter plate 9. When the medium is placed on the top of the filter plate 9, a certain distance is reserved between the medium and the bottom end of the outlet pipe 30 to avoid obstructing the discharge of sewage. One side of the first tank body 1 and the second tank body 2 is fixedly connected with an inlet pipe 35, the inlet pipe 35 is roughly perpendicular to the outlet pipe 30, and the two inlet pipes 35 are respectively located above the two filter chamber top plates 8, and one end of the two inlet pipes 35 is respectively connected to one side of the two outlet pipes 30 and communicates with the outlet pipe 30; A first support frame 36 is fixedly connected to the inlet pipe 35. The first support frame 36 is cross-shaped. A first rotating shaft 37 is rotatably connected to the first support frame 36. The first rotating shaft 37 is located at the center of the first support frame 36, and the central axis of the first rotating shaft 37 coincides with the central axis of the inlet pipe 35. A plurality of driving blades 38 are fixedly connected to the first rotating shaft 37. The driving blades 38 are located on the side of the support frame away from the outlet pipe 30. Two second support frames 42 are fixedly connected to the outlet pipe 30. The shape of the second support frame 42 is also cross-shaped, the same as the shape of the first support frame 36. The two The second support frame 42 is rotatably connected to a second rotating shaft 41, and the second rotating shaft 41 is located at the center of the second support frame 42. The central axis of the second rotating shaft 41 coincides with the central axis of the outlet pipe 30. A plurality of cleaning components 44 are fixedly connected to the second rotating shaft 41. The cleaning components 44 include scrapers 444. The scrapers 444 are in contact with the inner wall of the outlet pipe 30. Two rotatable guide plates 46 are provided below the second rotating shaft 41. Both guide plates 46 are square and are symmetrically inclined downward to both sides from the center position of the outlet pipe 30. The two guide plates 46 are located below the outlet pipe 30.

[0030] In this embodiment, when sewage is introduced, due to the difference in gravitational potential energy, the sewage flows through the inlet pipe 35 into the outlet pipe 30. The sewage entering the outlet pipe 30 is discharged from its bottom end under the action of gravity and falls into the filter chamber 12 between the filter chamber top plate 8 and the filter plate 9. The medium filter layer placed on the filter plate 9 filters the sewage. When the sewage is discharged from the outlet pipe 30, it first contacts the guide plate 46. Guided by the upper surface of the guide plate 46, the sewage flows to the surrounding areas, thereby evenly impacting the filter layer downward, avoiding the phenomenon of sewage concentrating on the center of the filter layer and causing collapse due to low center and high surrounding areas. When the sewage flows through the inlet pipe 35, the flowing water drives the driving blade 38 to rotate, thereby driving the first rotating shaft 37 to rotate. The rotation of the first rotating shaft 37 (subsequent structure is described below) drives the second rotating shaft 41 to rotate. The second rotating shaft 41 drives the guide plate 46 below it to rotate, so that the falling sewage is continuously and evenly guided to the surrounding areas.

[0031] As an embodiment, a protective shell 39 is fixedly connected to the outlet pipe 30, and the protective shell 39 is L-shaped, so that the first bevel gear 40 and the second bevel gear 43 can rotate in the protective shell 39 while reducing the occupied space. One end of the first rotating shaft 37 passes through the protective shell 39 and is located in the protective shell 39. The first rotating shaft 37 is located at one end of the protective shell 39 and is fixedly connected to the first bevel gear 40. The second rotating shaft 41 passes through the protective shell 39, and the second bevel gear 43 is fixedly connected to the second rotating shaft 41. The first bevel gear 40 and the second bevel gear 43 are vertically arranged. The second bevel gear 43 is located in the protective shell 39. The first bevel gear 40 is meshed with the second bevel gear 43. The bottom end of the second rotating shaft 41 is fixedly connected to two connecting rods 45. The two The guide plates 46 are respectively fixedly connected to the bottom ends of the two connecting rods 45, and the tops of the two guide plates 46 are provided with guide grooves 47. The cleaning assembly 44 includes a support block 441, which is fixedly connected to one side of the second rotating shaft 41. A slide groove 442 is provided on the side of the support block 441 away from the second rotating shaft 41. A slider 443 is slidably connected in the slide groove 442. The scraper 444 is fixedly connected to one side of the slider 443. A tension spring 445 is provided between the slider 443 and one side of the slide groove 442. The bottom of the slider 443 is fixedly connected to the support rod 446, and the other end of the support rod 446 is fixedly connected to the push plate 447. The push plate 447 is circular and is tilted to make it better contact with the rising water flow.

[0032] In this embodiment, when the driving blade 38 drives the first rotating shaft 37 to rotate on the first supporting frame 36, the first rotating shaft 37 drives the first bevel gear 40 to rotate in the protective shell 39. When the first bevel gear 40 rotates, the meshing drives the second bevel gear 43 to rotate synchronously in the protective shell 39. The second bevel gear 43 rotates in the protective shell 39, which drives the second rotating shaft 41 to rotate. When the second rotating shaft 41 rotates on the second supporting frame 42, it drives the two connecting rods 45 at the bottom to rotate around the second rotating shaft 41 as the center, thereby driving the two guide plates 46 at the bottom to rotate synchronously through the connecting rods 45 to divert the sewage put in. During backwashing, the filtered water and the sewage in the filter chamber 12 will enter the outlet pipe 30 at the lower inlet of the outlet pipe 30 and move upward in the outlet pipe 30. At this time, the sewage discharged from the inlet pipe 35 into the outlet pipe 30 is synchronously discharged at the outlet pipe 30. The water rises in the outlet pipe 30, and when the water flows upward, it first contacts the push plate 447, hitting the push plate 447 to move in the direction away from the second rotating shaft 41, and the push plate 447 drives the support rod 446 to push the slider 443, and the two sliders 443 slide away in the two slide grooves 442 synchronously, causing the tension spring 445 to undergo elastic deformation, thereby pushing the two scrapers 444 on both sides to approach the inner wall of the outlet pipe 30, so that the scrapers 444 can fit into the inner wall of the outlet pipe 30 when cleaning the inner wall of the outlet pipe 30, resulting in better cleaning effect, and at the end of backwashing, the sewage in the outlet pipe 30 no longer rises. At this time, the two sliders 443 are pulled by the tension spring 445, driving the two scrapers 444 to disengage from the inner wall of the outlet pipe 30 for a reset operation, thereby avoiding continuous contact between the scrapers 444 and the inner wall of the outlet pipe 30, affecting the rotation of the bottom guide plate 46.

[0033] As an embodiment, two mounting plates 15 are fixedly connected to the first tank body 1 and the second tank body 2. The two mounting plates 15 are both located between the filter chamber top plate 8 and the filter plate 9. The two mounting plates 15 are evenly distributed between the filter chamber top plate 8 and the filter plate 9 for placing the medium in layers. The mounting plate 15 is annular. A first placement plate 16 and a plurality of second placement plates 18 are provided on the top of the mounting plate 15. The first placement plate 16 is located at the center of the mounting plate 15. Insertion plates 17 are fixedly connected to both sides of the first placement plate 16. Insertion holes 19 are provided on the plurality of second placement plates 18. The plurality of second placement plates 18 are installed on the insertion plates 17 on both sides of the first placement plate 16 through the insertion holes 19. The first placement plate 16 and the second placement plate 18 cooperate to form a circular plate. A gap is provided between the first placement plate 16 and the second placement plate 18, which supports the medium used for filtration while allowing the filtered water to flow downward. Four limiting grooves 20 are provided on the circular plate formed by the first placement plate 16 and the second placement plate 18.

[0034] In this embodiment, according to usage requirements, two mounting plates 15 are welded above the filter plate 9, and the distance between the two mounting plates 15 is roughly equal to the distance from the lower mounting plate 15 to the filter plate 9. When placing the medium, the medium is placed in sequence above the filter plate 9 and above the two mounting plates 15, so that the medium forms three filter layers. The thinner filter layer is conducive to slight floating of the medium during subsequent backwashing, alleviating the problem of filter layer compaction. When the medium needs to be replaced, the staff can remove the second placement plate 18 from the insertion plate 17, thereby removing the circular plate composed of the first placement plate 16 and the second placement plate 18, so as to facilitate the removal of the medium through the second manhole 6. During installation, the second placement plate 18 is installed on the insertion plate 17 on both sides of the first placement plate 16 through its insertion hole 19. After installation, the two outermost second placement plates 18 are fastened, for example, using bolts or snaps, so as to support the medium.

[0035] As an embodiment, the filter chamber 12 is between the filter chamber top plate 8 and the filter plate 9, the first water purification chamber 11 is below the filter plate 9, the second water purification chamber 13 is between the filter chamber top plate 8 and the support plate 31, and the drainage chamber 14 is above the support plate 31. Four connecting pipes 10 are fixedly connected to the filter chamber top plate 8 and the filter plate 9. The four connecting pipes 10 are evenly distributed on the filter chamber top plate 8. The upper ends of the four connecting pipes 10 are all located in the second water purification chamber 13, and the bottom ends of the four connecting pipes 10 are all located in the first water purification chamber 11. The support plate 31 is annular, and the top of the support plate 31 is fixedly connected There is an annular weir plate 32, which is located on the inner side of the support plate 31. The weir plate 32 cooperates with the inner wall of the first tank body 1 to form an annular water collecting trough. The support plate 31 provides support for the bottom of the annular water collecting trough, so that the water flow can enter the annular water collecting trough and be discharged at the water outlet 34. A V-shaped opening 33 is opened on the top of the weir plate 32. There are multiple V-shaped openings 33, which are evenly distributed on the weir plate 32. One side of the first tank body 1 and the second tank body 2 are fixedly connected with a water outlet 34, and the water outlet 34 is connected to the annular water collecting trough formed by the weir plate 32 and the inner wall of the first tank body 1.

[0036] In this embodiment, the sewage is put into the outlet pipe 30 through the inlet pipe 35, and is put into the filter chamber 12 through the bottom of the outlet pipe 30. The sewage is filtered from top to bottom through the medium filter layer set in the filter chamber 12 under the action of gravity. The filter layer physically filters the sewage, and the filtered water falls into the first water purification chamber 11 below. During continuous filtration, the water level of the first water purification chamber 11 gradually rises. The water level of the filtered water in the first water purification chamber 11 rises to the height of the inlet of the connecting pipe 10. The filtered water enters the connecting pipe 10 at the bottom end of the connecting pipe 10 and passes through the connecting pipe 11. 0 enters the second water purification chamber 13, ensuring that the filtered water in the first water purification chamber 11 can smoothly enter the second water purification chamber 13 for storage. During continuous filtration, the water level of the filtered water in the second water purification chamber 13 gradually rises until it touches the bottom of the support plate 31. When the position continues to rise, it enters between the weir plates 32, passes through the V-shaped opening 33 on the weir plate 32, and enters the annular water collection tank between the weir plate 32 and the inner wall of the tank. When the water level in the annular water collection tank gradually rises to the height of the water outlet 34, the filtered water is discharged at the water outlet 34, completing the filtration of the sewage.

[0037] As an embodiment, a ladder 3 is fixedly connected to one side of the first tank body 1 and the second tank body 2, and a guardrail 4 is fixedly connected to the top of the first tank body 1 and the second tank body 2. The guardrail 4 is annular and cooperates with the top of the tank body. A first manhole 5 is provided on the top of the first tank body 1 and the second tank body 2, and the first manhole 5 is connected to the drainage chamber 14. A second manhole 6 and a third manhole 7 are provided on one side of the first tank body 1 and the second tank body 2, and the second manhole 6 is connected to the filter chamber 12, and the third manhole 7 is connected to the first water purification chamber 11. The first tank body 1 A support base 23 is fixedly connected to the top of the second tank body 2, and a water distribution tank 24 is fixedly connected to the top of the support base 23. The water distribution tank 24 is located above the first tank body 1 and the second tank body 2. The bottom of the water distribution tank 24 is fixedly connected to a U-shaped water inlet pipe 22. The other ends of the two U-shaped water inlet pipes 22 are respectively connected to the inlet pipes 35 on the first tank body 1 and the second tank body 2. The first tank body 1 and the second tank body 2 are connected through a balancing pipe 21. The two ends of the balancing pipe 21 are respectively located in the second water purification chamber 13 of the first tank body 1 and the second tank body 2.

[0038] In this embodiment, the staff can climb to the top of the first tank body 1 or the second tank body 2 through the ladder 3, and the guardrail 4 provides protection. The staff can enter the drainage chamber 14 (i.e., the space above the support plate 31) through the first manhole 5, the filter chamber 12 through the second manhole 6, and the first water purification chamber 11 through the third manhole 7, which is convenient for inspection and maintenance. The water distribution tank 24 is located at a high place, and the sewage in it flows into the filter chamber 12 through the U-shaped water inlet pipe 22 by gravity. The setting of the U-shaped water inlet pipe 22 helps to form a water seal to prevent air from entering. The balancing pipe 21 keeps the water level of the second water purification chamber 13 in the first tank 1 and the second tank body 2 balanced to ensure that the drainage efficiency of the two is consistent.

[0039] As an embodiment, the other ends of the two outlet pipes 30 are fixedly connected to the water outlet pipe 25, and the other ends of the two water outlet pipes 25 are connected to the water seal box 29. The two outlet pipes 30 are fixedly connected to the siphon auxiliary pipe 26, and the other ends of the two siphon auxiliary pipes 26 respectively pass through the first tank body 1 and the second tank body 2 and are fixedly connected to the siphon breaking bucket 27. The part of the siphon auxiliary pipe 26 placed in the second clean water chamber 13 and connected to the siphon breaking bucket 27 is a hose. The two siphon breaking buckets 27 are respectively located in the second clean water chamber 13 of the first tank body 1 and the second tank body 2. One side of the two siphon auxiliary pipes 26 is fixedly connected to the siphon down pipe 28, and the other ends of the two siphon down pipes 28 are connected to the water seal box 29.

[0040] In this embodiment, during continuous filtration, impurities above the filter layer gradually accumulate, resulting in reduced filtration efficiency. At this time, the sewage water level in the filter chamber 12 gradually rises. When the water level rises to the bottom inlet of the outlet pipe 30 and continues to rise, the sewage begins to reversely enter the outlet pipe 30. The sewage rises in the outlet pipe 30, pressing the air in the outlet pipe 30 into the water seal box 29 through the siphon downpipe 28 for discharge. During the process of water and air discharge in the siphon downpipe 28, negative pressure (suction) is formed at the highest point (U-shaped top) of the outlet pipe 30. This negative pressure acts on the water in the water seal box 29 through the outlet pipe 25, lifting it. When the rising sewage in the outlet pipe 30 and the lifted water in the outlet pipe 25 converge at the highest point of the outlet pipe 30, the siphon effect is fully formed. Under the siphon effect, the outlet pipe 30 becomes a negative pressure state, thereby sucking the sewage in the filter chamber 12 and discharging it into the water seal box 29 through the outlet pipe 30 and the outlet pipe 25. The water level in the filter chamber 12 tends to decrease, and the filtered water in the first clean water chamber 11 flows upward in the opposite direction (backwashing), penetrates the filter layer, flushes the impurities on the top and carries them into the outlet pipe 30, and is discharged together with the sewage, thereby flushing the filter layer. During continuous backwashing, the filtered water in the second clean water chamber 13 is continuously replenished to the first clean water chamber 11 through the connecting pipe 10, causing the water level in the second clean water chamber 13 to drop. During backwashing, the suction generated inside the outlet pipe 30 also acts on the siphon auxiliary The auxiliary pipe 26 is used for extraction, and the siphon auxiliary pipe 26 also generates suction through the siphon breaking bucket 27 to continuously extract the filtered water in the second water purification chamber 13 until the water level drops below the siphon breaking bucket 27, and the siphon breaking bucket 27 is exposed to the air. At this time, the air will enter the siphon auxiliary pipe 26 through the siphon breaking bucket 27, and then enter the highest point of the outlet pipe 30, destroying the siphon effect, backwashing stops, and the filtration process is immediately restored. During the backwashing process, if there is still sewage flowing into the inlet pipe 35, the water flow flowing through the inlet pipe 35 will continue to drive the blades 38 to rotate, driving the first rotating shaft 37 and the second rotating shaft 41 to rotate. The second rotating shaft 41 drives two scrapers 444 attached to the inner wall of the outlet pipe 30 to continuously scrape the inner wall of the outlet pipe 30 to prevent the carried impurities from being adsorbed on the inner wall, ensuring that the impurities are discharged smoothly, and avoiding the impurities from falling off and being deposited on the filter layer again after the backwashing is completed.

[0041] As an embodiment, a cylinder 48 is fixedly connected to the outlet pipe 30, and both ends of the cylinder 48 are closed. The cylinder 48 is located in the second water purification chamber 13. A partition 49 is fixedly connected to the cylinder 48. The cylinder 48 is divided into a first cavity 50 and a second cavity 51 by the partition 49. The first cavity 50 and the second cavity 51 are air pressure balanced. A negative pressure tube 52 is fixedly connected to the partition 49. One end of the negative pressure tube 52 is located in the first cavity 50, and the other end of the negative pressure tube 52 is located in the second cavity 51. A piston 53 is provided in the negative pressure tube 52. One side of the piston 53 is fixedly connected to a first pull rope 54, and the other end of the first pull rope 54 passes through the cylinder 48 and is connected to the top of the siphon destroying bucket 27. The other side of the piston 53 is fixedly connected to a second pull rope 55, and the other end of the second pull rope 55 passes through the cylinder 48 and is connected to a buoyancy ball 56. The buoyancy ball 56 is located in the outlet pipe 30.

[0042] In this embodiment, during the backwash process, the filtered water in the first water purification chamber 11 continues to flow upward to clean the medium filter layer, and the backwash sewage carrying debris flows upward through the outlet pipe 30. When the backwash continues, the debris filtered out from the top of the medium filter layer is gradually taken away, and the backwash effect is gradually completed, so that the efficiency of the filtered water in the first water purification chamber 11 passing through the medium filter layer into the filter chamber 12 is increased. When the power driving the backwash water flow maintains a constant flow rate, the upward flow rate of the sewage in the outlet pipe 30 gradually increases. When the upward flow velocity of the sewage in the outlet pipe 30 increases, the buoyancy ball 56 is impacted, causing the buoyancy ball 56 to rise in the outlet pipe 30, and the buoyancy ball 56 drives the second pull rope 55 to move, thereby pulling the piston 53 in the negative pressure pipe 52 to move through the second pull rope 55, driving the piston 53 to move from the first cavity 50 to the second cavity 51 in the negative pressure pipe 52, and the piston 53 pulls the first pull rope 54. When the first pull rope 54 moves, the siphon breaking bucket 27 is lifted. After the backwash cleaning is completed, the buoyancy ball 56 is pushed up to the highest position, thereby The rope 54 cooperates with the second pull rope 55 to pull the siphon breaking bucket 27 to move upward in the second clean water chamber 13. In this way, when the backwash effect is quickly achieved, the siphon breaking bucket 27 can be pulled out from the filtered water in the second clean water chamber 13, thereby destroying the siphon effect and continuing to filter the sewage. When the backwash effect is not achieved, the filtered water in the second clean water chamber 13 can be fully utilized. When the second pull rope 55 pulls the piston 53 to move in the negative pressure pipe 52, the gas in the first cavity 50 is extracted through the negative pressure pipe 52, and the movement of the piston 53 pushes the gas into the first cavity 50. The air in the second cavity 51 is squeezed from the negative pressure tube 52 (or the first cavity 50), thereby reducing the air pressure in the first cavity 50 and increasing the air pressure in the second cavity 51. After the backwash is completed, the buoyancy ball 56 is not subjected to the impact force. At this time, the piston 53 is pushed by the high-pressure gas in the second cavity 51 and the low pressure (negative pressure) in the first cavity 50. The piston 53 moves in the opposite direction (i.e., toward the first cavity 50) in the negative pressure tube 52, thereby driving the siphon destroyer 27 to descend and reset, so that the filtered water in the second water purification chamber 13 can be fully used during the next backwash.

[0043] Working principle of the present invention: During use, sewage is injected into the water distribution tank 24, and the water distribution tank 24 evenly distributes the sewage to the first tank body 1 and the second tank body 2 through two U-shaped water inlet pipes 22. The sewage enters the corresponding filter chamber 12 through their respective inlet pipes 35, flows through the medium filter layer for filtration, and the filtered water enters the first water purification chamber 11. After the water level in the first water purification chamber 11 reaches a certain height, the filtered water rises through the connecting pipe 10 and enters the second water purification chamber 13. When the water level in the second water purification chamber 13 gradually rises to exceed the height of the weir plate 32, the filtered water passes over the V-shaped overflow port on the weir plate 32, flows into the annular water collection tank, and is finally discharged at the water outlet 34.

[0044] When sewage is continuously injected into the filter chamber 12, the water flow drives the driving blade 38 in the inlet pipe 35 to rotate, thereby driving the first rotating shaft 37 to rotate, and driving the second rotating shaft 41 to rotate through the second bevel gear 43, thereby rotating the guide plate 46 at the bottom. The rotating guide plate 46 enables the water flow to be evenly distributed on the surface of the medium filter layer.

[0045] When impurities on the top of the filter layer continue to accumulate, causing the filtration resistance to increase (or the filtration efficiency to decrease), the sewage water level in the filter chamber 12 rises accordingly. When the water level rises to the bottom inlet of the outlet pipe 30, the sewage begins to reversely enter the outlet pipe 30 and flow upward. At the same time, the filtered water in the first clean water chamber 11 reverses upward (backwash water flow) under the action of the pressure difference to penetrate the filter layer, flushing the impurities above the filter layer and carrying them into the outlet pipe 30 for discharge to the water seal box 29. During the backwashing process, the rotating second shaft 41 drives the scraper 444 to rotate close to the inner wall of the outlet pipe 30, continuously scraping off impurities adsorbed on the inner wall of the outlet pipe 30, ensuring that the impurities can be discharged smoothly with the water flow.

[0046] As the backwash proceeds, the filtered water in the second clean water chamber 13 is continuously replenished to the first clean water chamber 11 through the connecting pipe 10, causing its water level to gradually decrease. When the water level drops below the siphon breaking bucket 27, air enters the highest point of the outlet pipe 30 through the siphon breaking bucket 27 and the siphon auxiliary pipe 26, destroying the siphon effect, thereby achieving the interruption of the backwash sewage flow. Subsequently, the system continues to filter the sewage.

[0047] During the backwashing process, the filtered water in the first water purification chamber 11 continues to flow upward, and the debris filtered out from the top of the medium filter layer is gradually taken away, and the backwashing effect is gradually completed, so that the efficiency of the filtered water in the first water purification chamber 11 passing through the medium filter layer into the filter chamber 12 is increased. When the power driving the backwashing water flow maintains a constant flow rate, the upward flow rate of the sewage in the outlet pipe 30 gradually increases. When the upward flow rate of the sewage in the outlet pipe 30 increases, the buoyancy ball 56 is impacted, and the buoyancy ball 56 drives the second pull rope 55 to move, thereby pulling the piston in the negative pressure pipe 52 through the second pull rope 55. 53 moves, driving the piston 53 to move from the first cavity 50 to the second cavity 51 in the negative pressure tube 52. The piston 53 pulls the first pull rope 54, and the first pull rope 54 lifts the siphon breaking bucket 27 when it moves. After the backwash cleaning is completed, the buoyancy ball 56 is not subjected to the impact force, and the piston 53 is subjected to the thrust of the high-pressure gas in the second cavity 51 and the force of the low pressure in the first cavity 50. The piston 53 moves in the opposite direction in the negative pressure tube 52, thereby driving the siphon breaking bucket 27 to descend and reset, so that the filtered water in the second water purification chamber 13 can be fully used during the next backwash.

[0048] The present invention has the following technical effects.

[0049] 1. The present invention uses the first rotating shaft 37, the driving blades 38, the guide plate 46 and the guide groove 47 to rotate the driving blades 38 and the guide plate 46 for the sewage discharged from the outlet pipe 30, so that the falling sewage slides around through the guide plate 46, thereby preventing the sewage from directly impacting the middle position of the medium filter layer vertically downward, thereby preventing the medium from collapsing with high edges and low middle.

[0050] 2. The present invention separates the placed media through the support plate 31, the first placement plate 16, the insertion plate 17 and the second placement plate 18, thereby effectively slowing down the compaction of the medium filter layer when used for a long time, and placing the medium filter layer in layers, which can effectively prevent the filter layer from compacting during backwashing; through the scraper 444, when the backwash sewage flows through the outlet pipe 30, the impurities adsorbed on the inner wall of the outlet pipe 30 are cleaned, so that the impurities carried by the sewage can be discharged smoothly, avoiding the impurities falling again and landing on the top of the filter layer after backwashing.

[0051] 3. The present invention facilitates filtration of the sewage by means of the filter layer top plate, filter plate 9, connecting pipe 10 and weir plate 32. As the purified water level continues to rise, the purified water gradually rises within the tank body and is discharged from the water outlet 34 through the weir plate 32. No external power is required, and the sewage purification process can be completed by relying on the system's own hydraulic conditions, such as sewage inlet head, gravity filtration and overflow.

[0052] 4. The present invention uses the siphon auxiliary pipe 26, the siphon breaking bucket 27 and the siphon downpipe 28 to solve the problem of impurities gradually accumulating on the top of the filter layer and affecting the filtration efficiency during the long-term sewage purification process. By forming a siphon effect to suck the sewage and impurities above the filter chamber 12, the impurities on the top of the filter layer are driven to rise into the outlet pipe 30 for discharge, thereby achieving the cleaning of impurities on the top of the filter layer.

[0053] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. Various modifications and substitutions of the present invention will be readily apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A media filter based on hydraulic self-driven backwashing, comprising a first tank body (1), a second tank body (2), a water distribution tank (24) and a water seal tank (29), characterized in that: The first tank body (1) and the second tank body (2) are both fixedly connected with a filter chamber top plate (8), a filter plate (9) and a support plate (31), the support plate (31) is located above the filter chamber top plate (8), and the filter plate (9) is located below the filter chamber top plate (8). The tops of the first tank body (1) and the second tank body (2) are both fixedly connected with outlet pipes (30), the bottom ends of the two outlet pipes (30) pass through the filter chamber top plate (8) and are located below the filter chamber top plate (8), and one side of the first tank body (1) and the second tank body (2) are both fixedly connected with inlet pipes (35), the two inlet pipes (35) are respectively located above the two filter chamber top plates (8), and one end of the two inlet pipes (35) is respectively connected to the two outlet pipes (30); A first support frame (36) is fixedly connected to the inlet pipe (35), a first rotating shaft (37) is rotatably connected to the first support frame (36), a driving blade (38) is fixedly connected to the first rotating shaft (37), two second support frames (42) are fixedly connected to the outlet pipe (30), two second supporting frames (42) are rotatably connected to the second rotating shaft (41), a plurality of cleaning components (44) are fixedly connected to the second rotating shaft (41), the cleaning components (44) include scrapers (444), the scrapers (444) are in contact with the inner wall of the outlet pipe (30), two rotatable guide plates (46) are provided below the second rotating shaft (41), and the two guide plates (46) are located below the outlet pipe (30).

2. A media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: A protective shell (39) is fixedly connected to the outlet pipe (30), one end of the first rotating shaft (37) passes through the protective shell (39) and is located in the protective shell (39), one end of the first rotating shaft (37) located in the protective shell (39) is fixedly connected to a first bevel gear (40), the second rotating shaft (41) passes through the protective shell (39), a second bevel gear (43) is fixedly connected to the second rotating shaft (41), the second bevel gear (43) is located in the protective shell (39), the first bevel gear (40) is meshed with the second bevel gear (43), the bottom end of the second rotating shaft (41) is fixedly connected to two connecting rods (45), the two guide plates (46) are fixedly connected to the bottom ends of the two connecting rods (45), and the tops of the two guide plates (46) are each provided with a guide groove (47).

3. A media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: The cleaning assembly (44) includes a support block (441), the support block (441) is fixedly connected to one side of the second rotating shaft (41), a sliding groove (442) is provided on the side of the support block (441) away from the second rotating shaft (41), a slider (443) is slidably connected in the sliding groove (442), the scraper (444) is fixedly connected to one side of the slider (443), a tension spring (445) is provided between the slider (443) and one side of the sliding groove (442), the bottom of the slider (443) is fixedly connected to a support rod (446), and the other end of the support rod (446) is fixedly connected to a push plate (447).

4. A media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: Two mounting plates (15) are fixedly connected in the first tank body (1) and the second tank body (2), and the two mounting plates (15) are located between the filter chamber top plate (8) and the filter plate (9). The mounting plate (15) is annular, and a first placement plate (16) and a plurality of second placement plates (18) are provided on the top of the mounting plate (15). Insertion plates (17) are fixedly connected on both sides of the first placement plate (16), and insertion holes (19) are provided on the plurality of second placement plates (18). The plurality of second placement plates (18) are installed on both sides of the first placement plate (16) through the insertion holes (19). The first placement plate (16) and the second placement plate (18) cooperate to form a circle, and four limiting grooves (20) are provided on the circular plate formed by the first placement plate (16) and the second placement plate (18).

5. A media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: A filter chamber (12) is located between the filter chamber top plate (8) and the filter plate (9), a first water purification chamber (11) is located below the filter plate (9), a second water purification chamber (13) is located between the filter chamber top plate (8) and the support plate (31), and a drainage chamber (14) is located above the support plate (31). Four connecting pipes (10) are fixedly connected to the filter chamber top plate (8) and the filter plate (9), the upper ends of the four connecting pipes (10) are all located in the second water purification chamber (13), and the bottom ends of the four connecting pipes (10) are all located in the first water purification chamber (11).

6. A media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: The support plate (31) is annular, and an annular weir plate (32) is fixedly connected to the top of the support plate (31). The weir plate (32) cooperates with the inner wall of the first tank body (1) to form an annular water collecting trough. A V-shaped opening (33) is provided on the top of the weir plate (32). One side of each of the first tank body (1) and the second tank body (2) is fixedly connected to a water outlet (34). The water outlet (34) is communicated with the annular water collecting trough formed by the weir plate (32) and the inner wall of the first tank body (1).

7. A media filter based on hydraulic self-driven backwashing according to claim 5, characterized in that: A ladder (3) is fixedly connected to one side of the first tank body (1) and the second tank body (2), a guardrail (4) is fixedly connected to the top of the first tank body (1) and the second tank body (2), a first manhole (5) is provided on the top of the first tank body (1) and the second tank body (2), and the first manhole (5) is connected to the drainage chamber (14), and a second manhole (6) and a third manhole (7) are provided on one side of the first tank body (1) and the second tank body (2), the second manhole (6) is connected to the filter chamber (12), and the third manhole (7) is connected to the first water purification chamber (11).

8. The media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: The tops of the first tank body (1) and the second tank body (2) are fixedly connected to a support base (23), the tops of the support base (23) are fixedly connected to a water distribution tank (24), and the bottoms of the water distribution tanks (24) are fixedly connected to U-shaped water inlet pipes (22), the other ends of the two U-shaped water inlet pipes (22) are respectively connected to the inlet pipes (35) on the first tank body (1) and the second tank body (2), the first tank body (1) and the second tank body (2) are connected via a balancing pipe (21), and the two ends of the balancing pipe (21) are respectively located in the second water purification chambers (13) of the first tank body (1) and the second tank body (2).

9. The media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: The other ends of the two outlet pipes (30) are fixedly connected to the water outlet pipe (25), and the other ends of the two water outlet pipes (25) are connected to the water seal box (29). The two outlet pipes (30) are fixedly connected to the siphon auxiliary pipe (26), and the other ends of the two siphon auxiliary pipes (26) pass through the first tank body (1) and the second tank body (2) respectively and are fixedly connected to the siphon breaking bucket (27). The two siphon breaking buckets (27) are respectively located in the second clean water chamber (13) of the first tank body (1) and the second tank body (2). One side of the two siphon auxiliary pipes (26) is fixedly connected to the siphon down pipe (28), and the other ends of the two siphon down pipes (28) are connected to the water seal box (29).

10. The media filter based on hydraulic self-driven backwashing according to claim 1, characterized in that: The outlet pipe (30) is fixedly connected to a cylinder (48), the cylinder (48) is located in the second water purification chamber (13), a partition (49) is fixedly connected to the cylinder (48), the cylinder (48) is divided into a first cavity (50) and a second cavity (51) by the partition (49), a negative pressure pipe (52) is fixedly connected to the partition (49), one end of the negative pressure pipe (52) is located in the first cavity (50), and the other end of the negative pressure pipe (52) is located in the second cavity (51). 1), a piston (53) is provided in the negative pressure tube (52), one side of the piston (53) is fixedly connected to a first pull rope (54), the other end of the first pull rope (54) passes through the cylinder (48) and is connected to the top of the siphon breaking bucket (27), the other side of the piston (53) is fixedly connected to a second pull rope (55), the other end of the second pull rope (55) passes through the cylinder (48) and is connected to a buoyancy ball (56), and the buoyancy ball (56) is located in the outlet pipe (30).

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