A flotation sedimentation device for sewage treatment

Abstract

The present invention relates to the technical field of sewage treatment, and specifically discloses a flotation sedimentation device for sewage treatment, comprising a box with a sedimentation tank, a chain transmission mechanism is arranged on the top of the sedimentation tank, the chain transmission mechanism comprises a chain, a foam scraper plate is arranged on the chain, cleaning devices are arranged at both ends of the foam scraper plate, the cleaning device comprises an air cylinder, a tension spring, a U-shaped cleaning plate, a cleaning brush, a jet can, a cylinder, a piston mechanism, and a fan; the air cylinder comprises a cylinder and a first piston, the first piston is connected to the U-shaped cleaning plate through a connecting rod, and the U-shaped cleaning plate is buckled at the bottom of the foam scraper plate; the tension spring connects the cylinder and the connecting rod, the jet can is arranged on a mounting plate fixed to the foam scraper plate, and a jet port is arranged on the outer periphery, the cylinder is fixed on the foam scraper plate, and has a downwind port and an upwind port, the piston mechanism comprises a second piston and a driving rod, and the driving rod is connected to the cleaning brush by transmission; the fan is arranged outside the cylinder and blows air into the cylinder. The present invention has the advantages of improving the sewage filtering effect and efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and specifically discloses an air flotation sedimentation device for sewage treatment. Background Art

[0002] Sewage often contains various pathogens, such as viruses, bacteria, and parasites. When water bodies are contaminated by pathogens, diseases will spread, especially slaughterhouse wastewater, which is a typical organic and biochemical wastewater, containing a large amount of blood, grease, fur, internal organs, undigested food, feces, etc. Most sewage treatment methods use flotation equipment to make the dissolved air system produce a large number of fine bubbles in the water, so that the air is attached to the suspended particles in the form of highly dispersed tiny bubbles, resulting in a state where the density is less than that of water, and the buoyancy principle is used to make the scum float on the water surface, thereby realizing the water treatment equipment of solid-liquid separation. The scum is then scraped to the sludge area by the scraper, and the clean water in the lower layer flows to the clean water tank through the water collection pipe.

[0003] However, when the flotation machine is treating slaughterhouse wastewater, the blood, grease and other debris inside are still easily attached to the inner wall of the flotation machine and the inner wall of the scraper after flocculation, resulting in a large amount of debris or scum adhering to the inner wall of the flotation machine and the inner wall of the scraper, which is difficult to clean and easily causes secondary pollution.

[0004] The sewage treatment equipment in the prior art is shown in the Chinese patent with the authorization announcement number CN117417016B, which discloses a municipal sewage treatment equipment, wherein a plurality of air blowing heads are installed on the bottom side of the cleaning frame, and the plurality of air blowing heads are used to blow away the oil stains on the scraper. However, simply by setting a plurality of air blowing heads to blow air on the scraper, it is not possible to completely clean up the oil stains or scum remaining on the scraper and the inner wall of the air flotation machine, especially some residues with strong adhesion, which will cause the oil stains or scum to still adhere to the scraper and the inner wall of the air flotation machine, causing secondary pollution, thereby making the sewage filtration efficiency low. Summary of the invention

[0005] The invention provides an air flotation sedimentation device for sewage treatment, which solves the technical problem that oil or scum still adheres to the scraper and the inner wall of the air flotation machine to cause secondary pollution, thereby making the sewage filtering efficiency low.

[0006] In order to solve the above problems, the present invention provides an air flotation sedimentation device for sewage treatment, which adopts the following technical scheme: it includes a box body provided with a sedimentation tank, a chain transmission mechanism is provided on the top of the sedimentation tank, the chain transmission mechanism includes a chain that circulates left and right, and a foam scraper plate is fixedly provided on the chain; cleaning devices are provided at the front and rear ends of the foam scraper plate, and the cleaning device includes an air cylinder, a tension spring, a U-shaped cleaning plate, a cleaning brush, a spray can, a cylinder, a piston mechanism, and a fan; the air cylinder includes a cylinder body extending forward and backward and fixedly provided on the foam scraper plate, and a first piston, the first piston is connected to the U-shaped cleaning plate through a connecting rod, and the U-shaped cleaning plate is buckled at the bottom of the foam scraper plate; the tension spring connects the cylinder body and the connecting rod to drive the U-shaped cleaning plate to move toward the end of the foam scraper plate; the spray can is provided on the installation fixed to the foam scraper plate The plate is provided with jet ports on the outer periphery to jet and clean the inner wall of the sedimentation tank and the cleaning brush; the cylinder is fixedly arranged on the scraper plate, and has a downwind port connected to the cylinder body and an upwind port connected to the jet tank through an air pipe; the piston mechanism comprises a second piston and a driving rod located in the cylinder, and the driving rod is transmission-connected to the cleaning brush; the fan is arranged outside the cylinder and blows air into the cylinder; when the scraper plate is in the lower half of the chain, the second piston closes the downwind port; when the scraper plate rises from the lower half of the chain to the arc section at the end of the chain, the second piston drives the cleaning brush to move to clean the U-shaped cleaning plate; when the scraper plate is in the upper half of the chain, the second piston opens the downwind port to allow air to enter the cylinder, and the first piston overcomes the action of the tension spring and drives the U-shaped cleaning plate to move toward the middle of the scraper plate.

[0007] The technical effect is as follows: when the scraper plate rotates along with the chain in the lower half of the chain, the scraper plate scrapes off the scum floating on the sewage surface in the sedimentation tank, the fan is turned on, the second piston closes the lower air port, and the high-pressure gas flows from the upper air port through the air pipe to the jet tank and is ejected through the jet port on the outer periphery of the jet tank to jet and clean the inner wall of the sedimentation tank and the cleaning brush; when the scraper plate rotates and rises from the lower half of the chain to the arc section at the end of the chain, the scraper plate and the piston structure begin to invert, and the second piston moves toward the upper air port of the cylinder under the action of gravity, the drive rod begins to move and drives the cleaning brush to clean the U-shaped cleaning plate, and when the scraper plate When it is in the upper half of the chain, the scraper plate and the piston structure are completely inverted. At this time, the second piston moves to the upper air outlet under the action of gravity, and the lower air outlet is opened to allow air to enter the air cylinder. The high-pressure gas drives the first piston to overcome the force of the tension spring and drive the U-shaped cleaning plate to move toward the middle of the scraper plate to clean the scraper plate. After the fan is turned off, the tension spring is reset and drives the U-shaped cleaning plate to move away from the middle of the scraper plate through the first piston to clean the scraper plate again. Through multiple cleanings with the U-shaped cleaning plate, cleaning brush and jet can, the cleaning effect of the scraper plate surface and the inner wall of the sedimentation tank is better, thereby improving the filtering efficiency of sewage.

[0008] The present invention also includes the following technical solutions: the jet tank is rotatably mounted on the mounting plate around an axis extending up and down, the air pipe is rotatably assembled with the jet tank, and the jet port is arranged on one side of the jet tank; a spiral protrusion is also arranged on the outer periphery of the jet tank, and two sliding rods are arranged on the driving rod, the two sliding rods are in contact with both sides of the spiral protrusion and can slide along the spiral protrusion, and when the scraper plate is in the lower half of the chain, the jet port faces the inner wall of the sedimentation tank; when the scraper plate rises from the lower half of the chain to the arc section at the end of the chain, the second piston drives the jet tank to rotate through the driving rod, the sliding rod and the spiral protrusion and makes the jet port face the cleaning brush.

[0009] The technical effect is that when the scraper plate is located at the lower half of the chain, the jet outlet of the jet tank sprays jets toward the inner wall of the sedimentation tank to blow off the residue adhered to the inner wall of the sedimentation tank; when the scraper plate rises from the lower half of the chain to the arc section at the end of the chain, the second piston moves toward the upwind direction in the cylinder under the action of gravity, and the driving rod moves with the second piston. The two sliding rods on the driving rod slide along the spiral protrusion and drive the jet tank to rotate on the mounting plate so that the jet outlet is directed toward the cleaning brush to blow off the residue adhered to the cleaning brush. The rotation of the jet tank can achieve the effect of cleaning the inner wall of the sedimentation tank and the cleaning brush by opening the jet outlet on only one side of the jet tank.

[0010] The present invention also includes the following technical solution: the jet port is an inclined hole arranged obliquely to the outer periphery of the jet tank.

[0011] The technical effect thereof lies in that the air jet port is an inclined hole, so that the gas ejected from the air jet port is concentrated on the sedimentation tank or the cleaning brush, thereby achieving a better cleaning effect.

[0012] The present invention also includes the following technical solution: the second piston is a circular piston, and an air duct penetrating the outer wall of the second piston is provided in the height direction of the second piston; in the circumferential direction of the second piston, the air duct and the upper air outlet are in the same position, and the air duct and the lower air outlet are staggered.

[0013] The technical effect is that the second piston is a circular piston, which is convenient for closing the upwind or downwind port when the second piston is located at the upwind or downwind port, and the air passage arranged through the outer peripheral wall of the second piston is in the same position as the upwind port in the circumferential direction of the second piston, and the air passage is staggered with the downwind port, so that when the second piston is located at the upwind port, the gas can be transmitted to the upwind port through the air passage, and then sprayed out from the spray port of the spray tank, thereby ensuring that the spray tank can spray in real time.

[0014] The present invention also includes the following technical solution: the cleaning brush is connected to the driving rod through a gear rack mechanism, the gear rack mechanism includes two groups of racks respectively connected to the cleaning brush and the driving rod, and a gear rotatably installed on the end surface of the scraper plate, and the two racks are respectively meshed with the left and right sides of the gear.

[0015] The technical effect is that by driving the rack connected to the driving rod to move, the gear drives the rack connected to the cleaning brush to move in the opposite direction of the driving rod, driving the cleaning brush to clean the U-shaped cleaning plate, avoiding impurities from adhering to the U-shaped cleaning plate, and ensuring the cleaning effect of the U-shaped cleaning plate.

[0016] The present invention also includes the following technical solution: the cleaning brush is coated on the U-shaped cleaning plate.

[0017] The present invention also includes the following technical solutions: the chain transmission mechanism also includes two groups of chain rods installed on the inner side of the top box of the sedimentation tank, sprockets are provided at both ends of the chain rods, the chain is wound around the sprockets, and a driving motor is also provided on the outer side of the top box of the sedimentation tank to drive the chain rods to rotate, and a material receiving plate installed on the inner wall of the box is also provided between the upper and lower halves of the chain.

[0018] The present invention also includes the following technical solution: a froth trough is further provided on the right side of the sedimentation tank, a channel 1 is opened on the box at the bottom of the froth trough, and a channel 2 is opened on the box at the bottom of the sedimentation tank.

[0019] The present invention also includes the following technical scheme: a flocculation tank and an air flotation tank are provided on the left side of the sedimentation tank, a stirring device is provided in the flocculation tank, an air dissolving pipe is provided in the air flotation tank, and an air dissolving tank is externally connected to the air dissolving pipe.

[0020] The beneficial effects of the present invention are as follows: when the scraper plate rotates along with the chain in the lower half of the chain, the scraper plate scrapes off the scum floating on the sewage surface in the sedimentation tank, the fan is turned on, the second piston closes the lower air port, and the high-pressure gas flows from the upper air port through the air pipe to the jet tank and is sprayed out through the jet port on the outer periphery of the jet tank to jet and clean the inner wall of the sedimentation tank and the cleaning brush; when the scraper plate rotates and rises from the lower half of the chain to the arc section at the end of the chain, the scraper plate and the piston structure begin to invert, and the second piston moves toward the upper air port of the cylinder under the action of gravity, the drive rod begins to move and drives the cleaning brush to clean the U-shaped cleaning plate, and when the scraper plate When the plate is in the upper half of the chain, the scraper plate and the piston structure are completely inverted. At this time, the second piston moves to the upper air outlet under the action of gravity, and the lower air outlet is opened to allow air to enter the air cylinder. The high-pressure gas drives the first piston to overcome the force of the tension spring and drive the U-shaped cleaning plate to move toward the middle of the scraper plate to clean the scraper plate. After the fan is turned off, the tension spring is reset and drives the U-shaped cleaning plate to move away from the middle of the scraper plate through the first piston to clean the scraper plate again. Through multiple cleanings with the U-shaped cleaning plate, cleaning brush and jet can, the cleaning effect of the scraper plate surface and the inner wall of the sedimentation tank is better, thereby improving the filtering efficiency of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 It is a three-dimensional schematic diagram of the air flotation sedimentation device in the present invention;

[0023] Figure 2 A three-dimensional schematic diagram of another embodiment of the air flotation sedimentation device of the present invention

[0024] Figure 3 It is a three-dimensional schematic diagram of another viewing angle of the air flotation sedimentation device of the present invention;

[0025] Figure 4 It is a top view schematic diagram of the air flotation sedimentation device in the present invention;

[0026] Figure 5 It is a cross-sectional schematic diagram of the air flotation sedimentation device of the present invention;

[0027] Figure 6 It is a schematic diagram of the partial structural composition of the air flotation sedimentation device in the present invention;

[0028] Figure 7 It is a schematic diagram of the assembly of the scraper plate and the cleaning device of the air flotation sedimentation device of the present invention;

[0029] Figure 8 For the present invention Figure 7 A magnified schematic diagram of part A in FIG.

[0030] Fig. 9 It is a schematic assembly diagram of the scraper plate and the cleaning device of the air flotation sedimentation device from another perspective;

[0031] Fig.10 For the present invention Fig. 9 A magnified schematic diagram of part B in FIG.

[0032] Fig.11 For the present invention Fig. 9 The enlarged schematic diagram of the C part in FIG.

[0033] Fig.12 It is a schematic side view of the assembly of the scraper plate and the cleaning device of the air flotation sedimentation device in the invention;

[0034] Fig.13 It is a schematic diagram of the state of the piston mechanism in the cylinder in the present invention;

[0035] Fig.14 It is a state diagram of the foam scraper plate at different positions on the chain in the present invention;

[0036] Fig.15 It is a three-dimensional schematic diagram of the cleaning plate and the cleaning brush in the present invention;

[0037] Fig.16 It is a three-dimensional schematic diagram of the rotating gas tank in the present invention;

[0038] Fig.17 It is a three-dimensional schematic diagram of the piston mechanism in the present invention.

[0039] Description of reference numerals:

[0040] 1. Box; 11. Sedimentation tank; 111. Channel 2; 12. Floating tank; 121. Channel 1; 13. Flocculation tank; 131. Stirring device; 14. Air flotation tank; 141. Dissolving air pipe; 142. Dissolving air tank; 143. Pipeline; 15. Receiving plate; 2. Chain transmission mechanism; 21. Chain; 22. Chain rod; 23. Sprocket; 24. Driving motor; 3. Scraping plate; 31. Mounting plate; 4. Cleaning device; 41. Air cylinder; 411. Cylinder; 4 12. First piston; 42. Tension spring; 43. U-shaped cleaning plate; 44. Cleaning brush; 45. Spray can; 451. Spray port; 452. Spiral protrusion; 46. Cylinder; 461. Downwind port; 462. Upwind port; 463. Air pipe; 47. Piston mechanism; 471. Second piston; 472. Drive rod; 473. Airway; 474. Sliding rod; 48. Fan; 49. Connecting rod; 5. Rack and pinion mechanism; 51. Rack; 52. Gear. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, or a detachable connection, or an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. And in the present invention, the definition of the length direction of the flotation sedimentation device as left and right, the width direction as front and back, and the height direction as up and down is only for the convenience of understanding and does not have a special meaning.

[0043] Specific embodiment of the air flotation sedimentation device:

[0044] like Figure 1-Figure 3 and Fig.12 As shown, the present invention provides an air flotation sedimentation device for sewage treatment, including a box body 1, a chain transmission mechanism 2, a scraper plate 3, a cleaning device 4, and a gear rack mechanism 5. The box body 1 is a top open structure, and a sedimentation tank 11 is arranged inside the box body 1. The chain transmission mechanism 2 is installed on the box body 1 at the top of the sedimentation tank 11, wherein the chain transmission mechanism 2 includes a chain 21, which performs left and right circulation motion on the top of the sedimentation tank 11, and the scraper plate 3 and the cleaning device 4 are fixedly installed on the chain 21. The scraper plate 3 is used to scrape off the scum floating on the sewage surface of the sedimentation tank 11 to achieve solid-liquid separation, and the cleaning device 4 is used to clean the scraper plate 3 and the residual scum on the inner wall of the sedimentation tank 11 to avoid secondary pollution and improve the filtering effect and efficiency of sewage.

[0045] Specifically, Figure 1-Figure 3 As shown, a froth trough 12 is further provided on the right side of the sedimentation tank 11, so that the scraper plate 3 can scrape the scum scraped from the sedimentation tank 11 into the froth trough 12 to separate the scum from the liquid. A channel 121 is provided at the bottom of the froth trough 12 for discharging the scum scraped into the froth trough 12 through the channel 121. A channel 2 111 is provided at the bottom of the sedimentation tank 11 for discharging clean water obtained after removing the scum from the channel 2 111, thereby improving the sewage treatment effect.

[0046] like Figure 1-Figure 4 As shown, a flocculation tank 13 and an air flotation tank 14 are also provided on the left side of the sedimentation tank 11. A stirring device 131 is provided in the flocculation tank 13. A dissolved air pipe 141 is provided in the air flotation tank 14. The dissolved air pipe 141 is externally connected to a dissolved air tank 142. The dissolved air tank 142 is connected to the dissolved air pipe 141 through a pipe 143. In the housing 1, the bottoms of the flocculation tank 13 and the air flotation tank 14 are connected to each other, and the tops of the air flotation tank 14 and the sedimentation tank 11 are connected to each other, so that the sewage can flow in the flocculation tank 13, the air flotation tank 14 and the sedimentation tank 11 after being treated. When the sewage enters the flocculation tank 13, a flocculant and a coagulant are injected into the flocculation tank 13, and then the sewage is stirred by the stirring device 131, so as to accelerate the contact between the sewage and the flocculant and the coagulant so that they can quickly blend and perform an effective flocculation reaction to form floccules, which is the basis for the next step of solid-liquid separation. Improve the treatment efficiency and treatment effect of sewage.

[0047] The flocculated sewage flows into the flotation tank 14 through the bottom of the flocculation tank 13 and the flotation tank 14, and is bubbled in the flotation tank 14. The compressed gas is injected into the dissolved air tank 142 by the air machine to mix the compressed gas with the sewage to generate dissolved air water with saturated air, which is transported to the dissolved air pipe 141 through the pipeline 143. Microbubbles are sprayed into the flotation tank 14 through the dissolved air pipe 141, so that the flocculants are attached to the bubbles and then enter the sedimentation tank 11. The density of the suspended matter attached to the bubbles is less than 1, and then the flocculants rise to the liquid surface together with the bubbles to form scum, which is scraped and cleaned by the scraper plate 3 to complete the cleaning of the scum.

[0048] like Figure 2 and Figure 6 As shown, in this embodiment, the chain transmission mechanism 2 includes a chain 21, a chain rod 22, a sprocket 23, and a driving motor 24. Two plates are protruding upward on the top of the sedimentation tank 11. In order to facilitate the installation of the chain transmission mechanism 2, the number of the chain transmission mechanism 2 is two groups, which are installed on the inner wall between the two plates. The two sprockets 23 on the same side are connected by the chain 21. The driving motor 24 is installed on the outer wall of the plate body, providing driving force to the chain rod 22, driving the scraping plate 3 installed on the chain 21 and the cleaning device 4 installed at both ends of the scraping plate 3 to perform left and right circular motion along with the chain 21. In other embodiments, the driving motor 24 can also be one of an oil cylinder and an air cylinder, without too much restriction.

[0049] like Figure 2 and Figure 6-Figure 9 As shown, in this embodiment, the scraper plate 3 is installed on two chains 21 through a long strip-shaped mounting strip. The scraper plate 3 can perform left and right circulation motion above the sedimentation tank 11 along with the chain 21, so as to scrape off the scum floating on the surface of the sewage in the sedimentation tank 11, realize solid-liquid separation, and improve the filtration efficiency of sewage.

[0050] like Figure 7-Figure 13 As shown, the cleaning device 4 includes an air cylinder 41, a tension spring 42, a U-shaped cleaning plate 43, a cleaning brush 44, a spray can 45, a cylinder 46, a piston mechanism 47, a fan 48, and a connecting rod 49. Figure 9-11As shown, the air cylinder 41 includes a cylinder body 411 and a first piston 412 extending forward and backward and fixed on the scraper plate 3. One end of the cylinder body 411 is connected to the cylinder 46, and the other end is equipped with the first piston 412. The first piston 412 is connected to the U-shaped cleaning plate 43 through a connecting rod 49. The first piston 412 is driven to extend out of the cylinder body 411 by the cylinder 46 to drive the U-shaped cleaning plate 43 to move toward the middle of the scraper plate 3. The tension spring 42 and the air cylinder 41 are arranged in parallel. The tension spring 42 connects the cylinder body 411 and the connecting rod 49 to drive the U-shaped cleaning plate 43 to move toward the end of the scraper plate 3. The U-shaped cleaning plate 43 is buckled at the bottom of the scraper plate 3, which is convenient for scraping and cleaning the left and right sides of the scraper plate 3, and scraping off the oil or residue adhering to the left and right sides of the scraper plate 3. The surface of the scraper plate 3 is ensured to be clean and avoid secondary pollution.

[0051] like Figure 8-Figure 10 and Fig.17 As shown, the cylinder 46 is fixed on the scraper plate 3, and has a lower air port 461 connected to the cylinder body 411 of the air cylinder 41 and an upper air port 462 connected to the spray tank 45 through an air pipe 463. The piston mechanism 47 is installed in the cylinder 46. The piston mechanism 47 includes a second piston 471 and a driving rod 472 located in the cylinder 46. The second piston 471 controls the opening and closing of the lower air port 461 and the upper air port 462 by moving up and down in the cylinder 46. Fig.13 As shown, when the second piston 471 is located at the bottom of the cylinder 46, the lower air port 461 is closed, and when the second piston 471 is located at the top of the cylinder 46, the upper air port 462 is closed. The driving rod 472 is connected to the cleaning brush 44 by transmission, and the fan 48 is arranged outside the cylinder 46 and blows air into the cylinder 46. The upper air port 462 and the lower air port 461 are opened and closed by the movement of the second piston 471 in the cylinder 46. When the wind blown by the fan 48 enters the jet tank 45 through the upper air port 462, the jet tank 45 sprays the wind through the jet port 451 to clean the inner wall of the sedimentation tank 11 and the cleaning brush 44. When the wind blown by the fan 48 sprays into the cylinder 41 through the lower air port 461, the wind pushes the first piston 412 to move in the cylinder 411, and the first piston 412 drives the U-shaped cleaning plate 43 to move toward the middle of the scraping plate 3 through the connecting rod 49 to clean the scraping plate 3.

[0052] like Fig.13 and Fig.17 As shown, the second piston 471 is a circular piston, and an air passage 473 penetrating the outer peripheral wall of the second piston 471 is provided in the height direction of the second piston 471 to facilitate the flow of gas through the upper air port 462 and the lower air port 461 .

[0053] like Figure 8 , Fig.10 , Fig.16As shown, the jet tank 45 is rotatably mounted on the mounting plate 31, and the jet tank 45 can rotate around an axis extending up and down the jet tank 45, and the upper end of the jet tank 45 is connected to the cylinder 46 through an air pipe 463, and the air pipe 463 and the jet tank 45 are rotatably assembled together, and the jet tank 45 rotates relative to the mounting plate 31 and the air pipe 463, and a jet port 451 is provided on one side of the jet tank 45 for spraying, and a spiral protrusion 452 is also provided on the outer periphery of the jet tank 45, and two sliding rods 474 are provided at one end of the driving rod 472 away from the second piston 471, and the two sliding rods 474 are in contact with both sides of the spiral protrusion 452 and can slide along the spiral protrusion 452. When the scraper plate 3 is in the lower half of the chain 21, the jet port 451 sprays toward the inner wall of the sedimentation tank 11 to blow off the residue adhered to the inner wall of the sedimentation tank 11; when the scraper plate 3 rises from the lower half of the chain 21 to the arc section at the end of the chain 21, the second piston 471 moves toward the upper air port 462 in the cylinder 46 under the action of gravity, and the driving rod 472 moves with the second piston 471; the two sliding rods 474 on the driving rod 472 slide along the spiral protrusion 452 and drive the jet tank 45 to rotate on the mounting plate 31 so that the jet port 451 faces the cleaning brush 44 to blow off the residue adhered to the cleaning brush 44; and the rotation of the jet tank 45 achieves the effect of cleaning the inner wall of the sedimentation tank 11 and the cleaning brush 44 by only opening the jet port 451 on one side of the jet tank 45.

[0054] In this embodiment, the jet port 451 may also be an inclined hole arranged obliquely to the outer periphery of the jet tank 45, so that the gas ejected from the jet port 451 is concentrated on the inner wall of the sedimentation tank 11 or on the cleaning brush 44, so as to achieve a better cleaning effect.

[0055] like Figure 8 , Fig.10 , Fig.12 As shown, the cleaning brush 44 is connected to the driving rod 472 through the gear rack mechanism 5. When the scraper plate 3 rotates from the lower half to the upper half along with the chain 21, the scraper plate 3 presents the following Fig.14 In the state where the sprocket 23 is located, at this time, the second piston 471 begins to be affected by gravity, and the driving rod 472 moves toward the direction of the air outlet 462 on the cylinder 46, and at the same time drives the gear rack mechanism 5 connected to the driving rod 472 to drive the cleaning brush 44 to move along the U-shaped cleaning plate 43, clean the U-shaped cleaning plate 43, and sweep away the scum adhered to the U-shaped cleaning plate 43 to ensure the cleanliness of the U-shaped cleaning plate 43, avoid the remaining scum adhering to the scraper plate 3 when scraping the scraper plate 3, and ensure the cleaning effect of the scraper plate 3.

[0056] like Figure 8 , Fig.12 , Fig.13 and Fig.15As shown, the rack and pinion mechanism 5 includes a rack 51 and a gear 52. There are two racks 51. The two racks 51 are respectively fixedly connected to one end of the driving rod 472 away from the cylinder 46 and the scraper plate 3. The gear 52 is rotatably installed on the end surface of the scraper plate 3. The gear 52 is located in the middle position of the two racks 51 and meshes with the rack 51 for transmission. Specifically, when the scraper plate 3 rotates with the chain transmission mechanism 2, the second piston 471 moves in the cylinder 46 under the influence of gravity, thereby driving the driving rod 472 to move. The driving rod 472 is fixedly connected to the rack 51, thereby driving the rack 51 to move. The rack 51 installed on the driving rod 472 drives the rack 51 installed on the scraper plate 3 to move in the opposite direction through the gear 52, driving the cleaning brush 44 to move along the U-shaped cleaning plate 43, completing the cleaning of the U-shaped cleaning plate 43 and improving the cleaning effect.

[0057] like Fig.12 As shown, the cleaning brush 44 is covered on the U-shaped cleaning plate 43, so that the contact area between the U-shaped cleaning plate 43 and the cleaning brush 44 is larger and the cleaning effect is better.

[0058] like Figure 2 and Figure 8 As shown, a receiving plate 15 mounted on the inner wall of the box body 1 is provided between the upper and lower halves of the chain 21 to facilitate placing the residues cleaned from the scraper plate 3, U-shaped cleaning plate 43, cleaning brush 44 and spray tank 45 onto the receiving plate 15.

[0059] Specifically, Figure 8-Figure 10 Combination Figure 13-Figure 14 As shown, when the scraper plate 3 is in the lower half of the chain 21, the second piston 471 is located at the bottom of the cylinder 46 and thus closes the lower air port 461, the upper air port 462 is opened, and the fan 48 is turned on to blow air to the cylinder 46, and the wind is blown into the jet tank 45 from the air pipe 463 through the upper air port 462, and then blown to the inner wall of the sedimentation tank 11 through the jet port 451 set on the jet tank 45, thereby blowing off the scum adhering to the inner wall of the sedimentation tank 11 to achieve a cleaning effect. In addition, since the jet tank 45 is cleaned by wind, there is no need to clean itself, which improves the cleaning effect of the scum and avoids secondary pollution.

[0060] When the scraper plate 3 is at the arc section at the end of the chain 21, Fig.13In the state shown, the second piston 471 moves in the cylinder 46 toward the upper air outlet 462 under the action of gravity. At this time, the lower air outlet 461 begins to open, but is not fully opened and cannot overcome the tensile force of the tension spring 42. Therefore, the air cylinder 41 does not push the U-shaped cleaning plate 43 to move, and the driving rod 472 begins to move and drives the rack 51 connected to the driving rod 472 to move. The rack 51 connected to the driving rod 472 drives the rack 51 connected to the cleaning brush 44 to move in the opposite direction through the gear 52, thereby driving the cleaning brush 44 to move along the U-shaped cleaning plate 43 to complete the cleaning of the U-shaped cleaning plate 43.

[0061] When the scraper plate 3 is in the upper half of the chain 21, refer to Fig.13 In the state shown, at this time, the second piston 471 moves completely to the upper air port 462 of the cylinder 46 under the action of gravity, and the driving rod 472 moves together with the second piston 471. The two sliding rods 474 on the driving rod 472 slide along the spiral protrusion 452 and drive the jet can 45 to rotate on the mounting plate 31 so that the jet port 451 faces the cleaning brush 44. Since the second piston 471 is provided with an air channel 473, the upper air port 462 can still be ventilated, ensuring that the jet can 45 continues to blow air to the cleaning brush 44. The cleaning brush 44 performs air blowing cleaning, and the lower air port 461 is fully opened to allow air to enter the air cylinder 41. After the air enters, the cylinder body 411 of the air cylinder 41 overcomes the tensile force of the tension spring 42 and pushes the first piston 412 to move toward the middle of the foam scraping plate 3, and drives the U-shaped cleaning plate 43 to move through the connecting rod 49, so as to facilitate the scraping and cleaning of the left and right sides of the foam scraping plate 3, and scrape off the oil or residue adhering to the left and right sides of the foam scraping plate 3, so as to ensure the cleanliness of the foam scraping plate 3 and avoid secondary pollution. When the foam scraping plate 3 continues to rotate with the chain 21, the fan 48 is closed, the tension spring 42 is reset, and the U-shaped cleaning plate 43 is driven to reset. When the second piston 471 falls to the bottom of the cylinder 46, the fan 48 is started to start a new round of cleaning. The scraper plate 3 is cleaned by the U-shaped cleaning plate 43, the U-shaped cleaning plate 43 is cleaned by the cleaning brush 44, and the cleaning brush 44 and the inner wall of the sedimentation tank 11 are cleaned by the jet tank 45. Multiple cleanings keep the scraper plate 3 clean at all times, avoid secondary pollution, and improve the sewage treatment effect.

[0062] In this embodiment, Figure 5 and Figure 8As shown, the jet port 451 is only provided on one side of the jet tank 45, and the rotation of the jet tank 45 is used to clean the inner wall of the sedimentation tank 11 and the cleaning brush 44. In other embodiments, the outer periphery of the jet tank 45 is provided with jet ports 451 in the direction of the inner wall of the sedimentation tank 11 and the direction of the cleaning brush 44. When the fan 48 is turned on, the air pipe 463 ejects the wind through the jet port 451 in the direction of the inner wall of the sedimentation tank 11 and the direction of the cleaning brush 44, so as to simultaneously jet clean the inner wall of the sedimentation tank 11 and the cleaning brush 44, and blow off the oil or residue adhering to the inner wall of the sedimentation tank 11 and the cleaning brush 44. At this time, the jet tank 45 can be fixedly mounted on the mounting plate 31 without rotation.

[0063] In this embodiment, Figure 8 and Fig.12 As shown, the cleaning brush 44 is connected to the driving rod 472 through the gear rack mechanism 5. The driving rod 472 moves downward and drives the cleaning brush 44 to move upward through the gear rack mechanism 5. Alternatively, the driving rod 472 moves upward and drives the cleaning brush 44 to move downward through the gear rack mechanism 5, thereby realizing the reverse movement of the cleaning brush 44 and the driving rod 472, and cleaning the U-shaped cleaning plate 43. In other embodiments, the cleaning brush 44 is connected to the driving rod 472 through a lever transmission, one end of the lever is connected to the driving rod 472, and the other end is connected to the cleaning brush 44. When the driving rod 472 moves downward and drives the lever connected to one end of the driving rod 472 to move downward, the other end of the lever moves upward, driving the cleaning brush 44 to move upward. When the driving rod 472 moves upward and drives the lever connected to one end of the driving rod 472 to move upward, the other end of the lever moves downward, driving the cleaning brush 44 to move downward. By driving the lever up and down, the cleaning brush 44 is driven to move up and down to clean the U-shaped cleaning plate 43, thereby improving the cleaning effect.

[0064] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0065] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A flotation sedimentation device for sewage treatment, comprising a housing provided with a sedimentation tank, characterized in that: A chain transmission mechanism is provided on the top of the sedimentation tank, and the chain transmission mechanism includes a chain that circulates left and right, and a foam scraper plate is fixed on the chain; cleaning devices are provided at both the front and rear ends of the foam scraper plate, and the cleaning device includes an air cylinder, a tension spring, a U-shaped cleaning plate, a cleaning brush, a spray can, a cylinder, a piston mechanism, and a fan; the air cylinder includes a cylinder body extending forward and backward and fixed on the foam scraper plate, and a first piston, the first piston is connected to the U-shaped cleaning plate through a connecting rod, and the U-shaped cleaning plate is buckled at the bottom of the foam scraper plate; the tension spring connects the cylinder body and the connecting rod to drive the U-shaped cleaning plate to move toward the end of the foam scraper plate; the spray can is arranged on the mounting plate fixed to the foam scraper plate, and a spray port is arranged on the outer periphery to spray the inner wall of the sedimentation tank and the cleaning brush The air cylinder is fixed on the scraper plate, and has a lower air port connected to the cylinder body and an upper air port connected to the spray tank through an air pipe; the piston mechanism comprises a second piston and a driving rod located in the cylinder, and the driving rod is transmission-connected to the cleaning brush; the fan is arranged outside the cylinder and blows air into the cylinder; when the scraper plate is in the lower half of the chain, the second piston closes the lower air port; when the scraper plate rises from the lower half of the chain to the arc section at the end of the chain, the second piston drives the cleaning brush to move to clean the U-shaped cleaning plate; when the scraper plate is in the upper half of the chain, the second piston opens the lower air port to allow air to enter the cylinder, and the first piston overcomes the force of the tension spring and drives the U-shaped cleaning plate to move toward the middle of the scraper plate.

2. The air flotation sedimentation device for sewage treatment according to claim 1, characterized in that: The jet tank is rotatably mounted on a mounting plate around an axis extending up and down, the air pipe is rotatably assembled with the jet tank, and the jet port is arranged on one side of the jet tank; a spiral protrusion is also arranged on the outer periphery of the jet tank, and two sliding bars are arranged on the driving rod, the two sliding bars are in contact with both sides of the spiral protrusion and can slide along the spiral protrusion, and when the scraper plate is in the lower half of the chain, the jet port faces the inner wall of the sedimentation tank; when the scraper plate rises from the lower half of the chain to the arc section at the end of the chain, the second piston drives the jet tank to rotate through the driving rod, the sliding bar and the spiral protrusion and makes the jet port face the cleaning brush.

3. The air flotation sedimentation device for sewage treatment according to claim 2, characterized in that: The jet port is an inclined hole arranged obliquely to the outer periphery of the jet tank.

4. The air flotation sedimentation device for sewage treatment according to claim 1, characterized in that: The second piston is a circular piston, and an air passage penetrating the outer peripheral wall of the second piston is provided in the height direction of the second piston; in the circumferential direction of the second piston, the air passage and the upper air port are at the same position, and the air passage and the lower air port are staggered.

5. The air flotation sedimentation device for sewage treatment according to claim 4, characterized in that: The cleaning brush is connected to the driving rod through a gear rack mechanism, which includes two sets of racks respectively connected to the cleaning brush and the driving rod, and a gear rotatably mounted on the end surface of the scraper plate, and the two racks are respectively meshed with the left and right sides of the gear.

6. The air flotation sedimentation device for sewage treatment according to claim 5, characterized in that: The cleaning brush is coated on the U-shaped cleaning plate.

7. The air flotation sedimentation device for sewage treatment according to claim 1, characterized in that: The chain transmission mechanism also includes two groups of chain rods installed on the inner side of the top box of the sedimentation tank. Both ends of the chain rods are provided with sprockets. The chain is wound around the sprockets. A driving motor is also provided on the outer side of the top box of the sedimentation tank to drive the chain rods to rotate. A material receiving plate installed on the inner wall of the box is also provided between the upper and lower halves of the chain.

8. The air flotation sedimentation device for sewage treatment according to claim 1, characterized in that: A froth trough is also provided on the right side of the sedimentation tank, a channel 1 is opened on the box at the bottom of the froth trough, and a channel 2 is opened on the box at the bottom of the sedimentation tank.

9. The air flotation sedimentation device for sewage treatment according to claim 8, characterized in that: A flocculation tank and an air flotation tank are also provided on the left side of the sedimentation tank. A stirring device is provided in the flocculation tank, and an air dissolving pipe is provided in the air flotation tank. The air dissolving pipe is externally connected to an air dissolving tank.

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