A combined scraping structure of air flotation machine and air flotation machine

Abstract

The present invention discloses a combined scraping structure of an air flotation machine and an air flotation machine. A scraping plate formed by splicing a plurality of arc-shaped scraping plates is used to scrape off the scum. The scraping plate can be applied to separation tanks of different sizes, and the contact area with the scum is larger, which can improve the scraping efficiency. The combined scraping structure is characterized in that it is composed of a support plate, a scraping plate, a sub-support plate, a sub-scraping plate, a scraping groove, a sealing strip, a snap-fit ​​block and a snap-fit ​​groove. The support plate is formed by splicing a plurality of sub-support plates end to end, and the angle between two adjacent sub-support plates is less than 180 degrees. A splicing groove is provided at one end of the sub-support plate, and a splicing block corresponding to the splicing groove is provided at the other end of the sub-support rod. A snap-fit ​​groove is provided on the bottom surface of the sub-support plate, and the depth of the snap-fit ​​groove is less than the thickness of the sub-support plate. A snap-fit ​​block corresponding to the snap-fit ​​groove is provided on the top surface of the sub-scraping plate.

Description

Technical Field

[0001] The present invention discloses a combined scraping structure of an air flotation machine and an air flotation machine, which relate to a combined scraping structure capable of improving scraping efficiency, and belong to the technical field of sewage treatment, and particularly to a combined scraping structure capable of scraping scum by means of a scraping plate formed by splicing a plurality of scraping plates with arc structures, so that the scraping plate can be suitable for separation tanks of different sizes, and has a larger contact area with the scum, thereby improving scraping efficiency. Background Art

[0002] Air flotation machine is a kind of equipment used for water treatment, mainly used in chemical plants, drinking water treatment, industrial wastewater treatment and other fields. Its working principle is to inject air or other gases into the water to generate a large number of tiny bubbles, and use these bubbles to adsorb impurities such as suspended matter, grease, etc. that are difficult to remove by natural sedimentation or floating in the water, so that they float on the water surface, thereby achieving solid-liquid separation. The traditional air flotation machine mainly includes components such as dosing device, dissolved air system, air flotation tank and scraping mechanism. The sewage first enters the reaction tank and mixes with the added flocculant to produce flocculation reaction, and then enters the contact tank to combine with the tiny bubbles in the dissolved air water to form floccules, enter the separation tank and float to the water surface to form scum, and finally the scum is scraped into the scum collection tank by the scraping mechanism for discharge. However, in traditional flotation machines, flocculants are added into the reaction tank through a dosing device. When the flocculants are added, they only exist in a certain position of the reaction tank, and the addition is uneven. Since the sewage continuously flows into the reaction tank at a certain flow rate, the sewage and the flocculant cannot fully contact each other before entering the next link, so that part of the sewage cannot be flocculated and floccules cannot be produced, resulting in low sewage treatment efficiency and poor treatment effect; and the tiny bubbles generated in the dissolved air system are also only concentrated in a certain position of the contact tank and cannot quickly diffuse to various areas of the contact tank, resulting in some floccules cannot be fully bonded with the tiny bubbles and cannot produce scum, resulting in low sewage treatment efficiency and poor treatment effect.

[0003] Announcement No. CN217895336U discloses a flotation machine with a sludge dewatering device, including an equipment body, the equipment body is divided into a dosing pretreatment unit, a flotation reaction treatment unit and a sludge dewatering treatment unit by a stainless steel partition, the dosing pretreatment unit includes a coagulant dosing reaction zone and a coagulant dosing reaction zone, the flotation reaction treatment unit is provided with a perforated water distribution pipeline, a dissolved air releaser, a mud discharge pipeline, an emptying pipeline, a slag scraping device, and a slag collection tank, and the sludge dewatering treatment unit includes a dehydration rotating motor and a dewatering tank. The above-mentioned flotation machine is provided with a coagulant dosing reaction zone agitator and a coagulant dosing reaction agitator, which can promote the full contact between sewage and flocculants and produce more floccules, but the tiny bubbles generated by the dissolved air tank in the above-mentioned flotation machine are only concentrated at a certain position of the equipment body through the dissolved air releaser, and cannot be quickly diffused to various areas of the equipment body, resulting in that some floccules cannot be fully bonded with the tiny bubbles and cannot produce slag, thereby resulting in low sewage treatment efficiency and poor treatment effect.

[0004] In order to improve the above-mentioned problems, the applicant filed another Chinese invention patent application entitled "A Flotation Machine". The third rotating motor drives the first connecting rod to rotate, the first connecting rod drives the second connecting rod to rotate, and the second connecting rod drives the scraper plate to rotate, so that the scraper plate can scrape the scum floating on the water surface of the separation tank into the slag collecting tank to achieve solid-liquid separation. However, the scraper plate of fixed length cannot be applied to separation tanks of different sizes, and the contact area between the straight scraper plate and the scum is small. The amount of scum scraped off at one time is small, and it takes a long time to complete the removal of the scum on the water surface of the entire separation tank, and the scraping efficiency is low. Summary of the invention

[0005] In order to improve the above situation, the present invention provides a combined scraper structure of an air flotation machine and an air flotation machine, which provides a scraper plate formed by splicing a plurality of arc-shaped scraper plates to scrape off the scum, so that the scraper plate can be suitable for separation tanks of different sizes, and the contact area with the scum is larger, thereby improving the scraping efficiency.

[0006] The present invention provides a combined scraping structure of an air flotation machine and an air flotation machine as follows: The combined scraping structure of an air flotation machine comprises a support plate, a scraping plate, a sub-support plate, a sub-scraping plate, a scraping groove, a sealing strip, a clamping block and a clamping groove. The support plate is formed by splicing a plurality of sub-support plates end to end, and the angle between two adjacent sub-support plates is less than 180 degrees. A splicing groove is provided at one end of the sub-support plate, and a splicing block corresponding to the splicing groove is provided at the other end of the sub-support rod. The bottom surface of the sub-support plate is provided with a snap-fit ​​groove, the depth of which is less than the thickness of the sub-support plate. The scraping plate is formed by splicing a plurality of scraping plates end to end, the scraping plates correspond to the supporting plates one by one, the length of the scraping plates is equal to the length of the supporting plates, and the scraping plates are arc-shaped structures. The top surface of the scraping plate is provided with a snap-fit ​​block corresponding to the snap-fit ​​groove. Preferably, a rubber pad is disposed on the inner side of the engaging groove. Preferably, the scraping plate is bent in an arc shape multiple times from one side to the other side of the connection with the engaging block. Preferably, the scraping plate is a hollow structure. Preferably, the thickness of the scraping plate gradually decreases from the center to both sides. The scraping plate is provided with a scraping groove, the depth of which is less than the thickness of the scraping plate. Preferably, the length of the scraping groove is smaller than the length of the scraping plate, and a plurality of the scraping grooves are staggered and equidistantly arranged along the width direction of the scraping plate. Preferably, the width of the scraping groove gradually increases from one end to the other end, and the depths of two adjacent scraping grooves are different. Preferably, the surface of the scraper plate is provided with an anti-stick coating; A sealing strip is arranged on the side of the scraping plate, the width of the sealing strip is greater than the width of the scraping plate, and the width of the sealing strip gradually decreases from one end to the other end. Furthermore, a rubber strip is disposed on the side of the sealing strip; Preferably, there are multiple rubber strips, and the multiple rubber strips are arranged equidistantly along the side of the sealing strip; Furthermore, a rubber prism is disposed on the side of the sealing strip, and the edge of the rubber prism faces outward. Preferably, there are a plurality of rubber prisms, and the plurality of rubber prisms are arranged without spacing along the side surface of the sealing strip.

[0007] The present invention also relates to an air flotation machine, which is composed of a separation component, a contact component and a flocculation component. The separation assembly is composed of a separation tank, a water outlet pipe, a filter screen, a slag discharge port, a slag collection tank, a support frame, a first connecting rod, a second connecting rod, a scraper plate, a third rotating motor and a support column. The separation tank is an arched structure with an open top. The slag collecting pool is a fan-shaped structure with an opening at the top. The two ends of the separation tank are in contact with the two ends of the slag collecting tank respectively, and the separation tank and the slag collecting tank form a ring structure. The top height of the separation tank is greater than or equal to the top height of the slag collection tank. The bottom surface of the slag collecting pool is provided with a slag discharge port. A plurality of support columns are located in the middle of the annular structure, and one end of each support column is inserted into the ground. Preferably, the plurality of support columns are arranged equidistantly along the circumference of the middle portion of the annular structure. The bottom of the support frame is placed at the other end of the plurality of support columns. The support frame is a hollow circular ring structure composed of a plurality of supporting round rods, and the middle part of the top surface of the support frame is a disc-shaped structure. The third rotating motor is placed in the middle of the top surface of the support frame, One end of the first connecting rod is connected to the motor shaft of the third rotating motor, The angle between one end of the first connecting rod and the motor shaft of the third rotating motor is 90 degrees. The other end of the first connecting rod is vertically placed on one end of the second connecting rod. The scraper plate is laterally located in the separation tank, and the bottom height of the scraper plate is greater than or equal to the top height of the slag collecting tank. Preferably, the two ends of the scraper plate are in contact with the two inner side surfaces of the separation tank respectively. The other end of the second connecting rod is placed on the top surface of the scraper plate. Preferably, the second connecting rod is a retractable structure. One end of the water outlet pipe is placed on one side of the separation tank and is connected to the separation tank. The filter screen is placed at one end of the water outlet pipe, and the diameter of the filter screen is equal to the inner diameter of the water outlet pipe. The contact assembly is composed of a contact box, a blower, an air inlet pipe, a connecting pipe, an air inlet branch pipe, a disc aerator, a second rotating motor, a support rod, a rotating disc, rotating blades and a sewage pipe. The contact box is located in the middle of the plurality of support columns. The second rotating motor is placed in the middle of the inner bottom surface of the contact box. The support rod is located in the contact box. The length of the support rod is smaller than the height of the contact box. One end of the support rod is connected to the motor shaft of the second rotating motor, A rotating disc is sleeved on the side of the support rod. Preferably, there are multiple rotating discs, and the multiple rotating discs are arranged equidistantly along the length direction of the support rod. The side of the rotating disc is provided with rotating blades. Preferably, there are a plurality of rotating blades, and the plurality of rotating blades are arranged equidistantly along the circumferential direction of the side surface of the rotating disk. Preferably, the rotating blade is an arc-shaped structure. The blower is located outside the contact box. One end of the air inlet pipe is connected to the air outlet of the blower and communicates with the air outlet of the blower. The connecting pipe is placed on the inner bottom surface of the contact box. The connecting pipe is a closed structure at both ends. Preferably, the connecting pipe is parallel to a side surface of the contact box and close to a side surface of the contact box. Preferably, the length of the connecting pipe is equal to the length of one side of the contact box. The other end of the air inlet pipe passes through a through hole opened at the bottom of one side of the contact box and is placed on the side of one end of the connecting pipe, and is connected to the side of one end of the connecting pipe. One end of the intake branch pipe is vertically placed on the side of the connecting pipe. The air intake branch pipe is a structure with a closed end. Preferably, there are multiple intake branch pipes, and the multiple intake branch pipes are arranged equidistantly along the length direction of the side surface of the connecting pipe. Preferably, the length of the air intake branch pipe is equal to the length of the other side of the contact box. The disc aerator is placed on the top side of the air inlet branch pipe. Preferably, there are a plurality of the disc aerators, and the plurality of the disc aerators are arranged equidistantly along the length direction of the air inlet branch pipe. One end of a sewage pipe is disposed on the side of the contact box, and one end of the sewage pipe is connected to the contact box. One end of the sewage pipe is close to the top surface of the contact box. The other end of the sewage pipe passes through a through hole opened on the other side of the separation tank and is located on the inner bottom surface of the separation tank. The flocculation assembly is composed of a first rotating motor, a dosing hopper, a sewage inlet pipe, a rotating rod, a spiral blade, a flocculation box and a water outlet. The flocculation box is placed on the top surface of the contact box. One end of the dosing hopper is placed on the top surface of the flocculation box and is connected to the flocculation box. Preferably, the diameter of the dosing hopper remains unchanged from one end to one third of the diameter, and gradually increases from one third of the diameter to the other end. The first rotating motor is placed in the middle of the top surface of the flocculation box. The rotating rod is placed in the flocculation box. One end of the rotating rod is connected to the motor shaft of the first rotating motor through a through hole opened in the middle of the flocculation box. The length of the rotating rod is smaller than the height of the flocculation box. The spiral blade is placed on the side of the rotating rod. Preferably, the length of the spiral blade is equal to the length of the rotating rod. Preferably, a plurality of spoiler protrusions are evenly arranged on the spiral blade. One end of the sewage inlet pipe is placed on one side of the flocculation box and is connected to the flocculation box. The bottom surface of the flocculation box is provided with a water outlet hole, and the water outlet hole is located at the side of the bottom surface of the flocculation box; Furthermore, the rotating blades are provided with flow-turbulating holes; Preferably, there are multiple groups of spoiler holes, and the multiple groups of spoiler holes are equidistantly arranged along the length direction of the rotating blade. There are multiple spoiler holes in each group, and the multiple spoiler holes are equidistantly arranged along the width direction of the rotating blade. Furthermore, the rotating blades are provided with spoiler strips; Preferably, the length of the spoiler strip is equal to the width of the rotating blade, there are a plurality of spoiler strips, and each of the spoiler strips is located between two adjacent groups of spoiler holes. Beneficial Effects

[0008] 1. The scum is scraped off by a scraper plate composed of a plurality of arc-shaped scraper plates, so that the scraper plate can be suitable for separation tanks of different sizes, and the contact area with the scum is larger, thereby improving the scraping efficiency of the combined scraper structure.

[0009] 2. Simple structure and easy to use.

[0010] 3. Low cost and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an air flotation machine of the present invention; Figure 2 A three-dimensional structural diagram of an air flotation machine of the present invention; Figure 3 This is a three-dimensional structural diagram of an air flotation machine of the present invention, which only shows the structure of the filter screen; Figure 4 This is a three-dimensional structural diagram of an air flotation machine of the present invention, which only shows the internal structures of the flocculation box and the contact box; Figure 5 It is a three-dimensional structural diagram of embodiment 2 of an air flotation machine of the present invention; Figure 6 It is a three-dimensional structural diagram of Example 3 of an air flotation machine of the present invention; Figure 7It is a three-dimensional structural diagram of a combined scraping structure of an air flotation machine of the present invention; Figure 8 This is a three-dimensional structural diagram of a combined scraper structure of an air flotation machine according to the present invention, in which only the structure of the clamping block and the clamping groove is shown; Fig. 9 This is a three-dimensional structural diagram of a combined scraper structure of an air flotation machine according to the present invention, in which only the structure of the sealing strip is shown; Fig.10 It is a three-dimensional structural diagram of Example 2 of a combined scraping structure of an air flotation machine of the present invention; Fig.11 It is a three-dimensional structural diagram of Example 3 of an air flotation machine combined scraping structure of the present invention. Attached photos

[0012] The components include: a separation tank (1), a support frame (2), a first connecting rod (3), a scraper plate (4), a slag discharge port (5), a sewage inlet pipe (6), a slag collecting tank (7), a water outlet pipe (8), a sewage discharge pipe (9), a third rotating motor (10), a first rotating motor (11), a dosing hopper (12), a second connecting rod (13), a supporting column (14), a flocculation box (15), a filter screen (16), a contact box (17), a spiral blade (18), a rotating rod (19), a blower (20), an inlet An air pipe (21), a connecting pipe (22), an air inlet branch pipe (23), a disc aerator (24), a second rotating motor (25), a support rod (26), a rotating disc (27), a rotating blade (28), a water outlet hole (29), a spoiler hole (30), a spoiler strip (31), a support plate (32), a sub-support plate (33), a snap-fit ​​block (34), a sub-scraping plate (35), a scraping groove (36), a sealing strip (37), a snap-fit ​​groove (38), a rubber strip (39), and a rubber prism (40). DETAILED DESCRIPTION Example 1

[0013] The present invention discloses an air flotation machine combined scraping structure, which comprises a support plate (32), a scraping plate (4), a sub-support plate (33), a sub-scraping plate (35), a scraping groove (36), a sealing strip (37), a snap-fit ​​block (34) and a snap-fit ​​groove (38). The support plate (32) is formed by splicing a plurality of sub-support plates (33) end to end, and the angle between two adjacent sub-support plates (33) is less than 180 degrees. A splicing groove is formed at one end of the sub-support plate (33), and a splicing block corresponding to the splicing groove is disposed at the other end of the sub-support rod (26). The bottom surface of the sub-support plate (33) is provided with a snap-fit ​​groove (38), the depth of the snap-fit ​​groove (38) being less than the thickness of the sub-support plate (33). The scraping plate (4) is formed by splicing a plurality of sub-scraping plates (35) end to end, the sub-scraping plates (35) correspond to the sub-support plates (33) one by one, the length of the sub-scraping plates (35) is equal to the length of the sub-support plates (33), and the sub-scraping plates (35) are arc-shaped structures. The top surface of the scraper plate (35) is provided with a snap-fit ​​block (34) corresponding to the snap-fit ​​groove (38). Preferably, a rubber pad is provided on the inner side of the engaging groove (38). Preferably, the scraping plate (35) is bent in an arc shape multiple times from one side of the connection with the engaging block (34) to the other side. Preferably, the scraping plate (35) is a hollow structure. Preferably, the thickness of the scraping plate (35) gradually decreases from the center to both sides. The scraping plate (35) is provided with a scraping groove (36), the depth of the scraping groove (36) being less than the thickness of the scraping plate (35). Preferably, the length of the scraping groove (36) is smaller than the length of the scraping plate (35), and a plurality of the scraping grooves (36) are arranged in a staggered and equidistant manner along the width direction of the scraping plate (35). Preferably, the width of the scraping groove (36) gradually increases from one end to the other end, and the depths of two adjacent scraping grooves (36) are different. Preferably, the surface of the scraper plate (35) is provided with an anti-stick coating; A sealing strip (37) is disposed on the side of the scraping plate (35), the width of the sealing strip (37) being greater than the width of the scraping plate (35), and the width of the sealing strip (37) gradually decreasing from one end to the other end. When in use, the combined scraping structure replaces the scraping plate (4) in the air flotation machine, and the first connecting rod (3) is driven to rotate by the third rotating motor (10), the first connecting rod (3) drives the second connecting rod (13) to rotate, and the second connecting rod (13) drives the support plate (32) and the scraping plate (4) to rotate, so that the scraping plate (4) composed of a plurality of arc-shaped scraping plates (35) can scrape the scum floating on the water surface of the separation tank (1) into the scum collecting tank (7), so that the scraping plate (4) is suitable for separation tanks (1) of different sizes, and the contact area with the scum is larger, which can improve the scraping efficiency. Example 2

[0014] The difference between this embodiment and the first embodiment is that a rubber strip (39) is arranged on the side of the sealing strip (37), and there are a plurality of rubber strips (39), which are arranged equidistantly along the side of the sealing strip (37); when in use, the rubber strip (39) can make the scraping plate (4) and the separation tank (1) fit more closely, preventing the scum scraped by the scraping plate (4) from flowing back through the gap between the scraping plate (35) and the separation tank (1), thereby achieving a better scraping effect, reducing the friction between the sealing strip (37) and the separation tank (1), and reducing damage to the sealing strip (37); Example 3

[0015] The difference between this embodiment and the first embodiment is that: a rubber prism (40) is arranged on the side of the sealing strip (37), the edges of the rubber prism (40) face outwards, there are a plurality of rubber prisms (40), and the plurality of rubber prisms (40) are arranged without spacing along the side of the sealing strip (37); when in use, the rubber prism (40) can make the scraping plate (4) and the separation tank (1) fit more closely, preventing the scum scraped by the scraping plate (35) from flowing back through the gap between the scraping plate (4) and the separation tank (1), thereby achieving a better scraping effect, reducing the friction between the sealing strip (37) and the separation tank (1), and reducing damage to the sealing strip (37); The support plate (32) is formed by a plurality of sub-support plates (33) spliced ​​end to end, and the angle between two adjacent sub-support plates (33) is less than 180 degrees. A splicing groove is formed at one end of the sub-support plate (33), and a splicing block corresponding to the splicing groove is disposed at the other end of the sub-support rod (26). The scraper plate (4) is formed by a plurality of sub-scraper plates (35) spliced ​​end to end. The one-to-one correspondence between the sub-scraper plates (35) and the sub-support plates (33) enables the length and shape of the scraper plate (4) to be adjustable, and can be applied to separation tanks (1) of different sizes and shapes, with greater flexibility. The inner side surface of the snap-fit ​​groove (38) is provided with a rubber pad, which is used to play a sealing role when the snap-fit ​​block (34) is inserted into the snap-fit ​​groove (38), so that the joint between the scraping plate (35) and the supporting plate (33) is tighter, thereby reducing the loosening of the connection between the scraping plate (35) and the supporting plate (33) after long-term use; The scraping plate (35) is designed to be bent in an arc shape multiple times from one side to the other side of the connection with the engaging block (34), so that the contact area between the scraping plate (35) and the scum can be increased, and the amount of scum scraped at one time is greater, and the scraping efficiency is higher; The slag scraping plate (35) is a hollow structure, and the thickness of the slag scraping plate (35) is designed to gradually decrease from the center to the two sides, which can reduce the weight of the slag scraping plate (35), reduce the scraping resistance, and improve the scraping efficiency; The bottom surface of the sub-support plate (33) is provided with a snap-fit ​​groove (38), the depth of which is less than the thickness of the sub-support plate (33), and the top surface of the sub-scraping plate (35) is provided with a snap-fit ​​block (34) corresponding to the snap-fit ​​groove (38). After long-term use, a lot of scum will remain on the surface of the sub-scraping plate (35), and the snap-fit ​​connection between the sub-scraping plate (35) and the sub-support plate (33) makes it easier to remove the sub-scraping plate (35) from the sub-support plate (33) for cleaning or replacement; The length of the scraping groove (36) is less than the length of the scraping plate (35), and the plurality of scraping grooves (36) are arranged in a staggered and equidistant manner along the width direction of the scraping plate (35), so that scum can be removed over a wider range, the accumulation of scum on the scraping plate (35) can be reduced, the risk of clogging can be reduced, and the scraping efficiency is higher; The width of the scraping groove (36) gradually increases from one end to the other end, and the depths of two adjacent scraping grooves (36) are different, which can help reduce the wear of the scraping groove (36) during the scraping process, extend the service life of the scraping plate (35), and can scrape away scum of different areas and sizes in the separation tank (1), thereby achieving higher scraping efficiency; The design of providing an anti-stick coating on the surface of the slag scraping plate (35) can reduce the adhesion of slag to the slag scraping plate (35), keep the surface of the slag scraping plate (35) clean, and improve the slag scraping efficiency.

[0016] The purpose is to scrape away the scum by using the scraper plate (4) formed by splicing a plurality of arc-shaped scraper plates (35), so that the scraper plate (4) is suitable for separation tanks (1) of different sizes and has a larger contact area with the scum, thereby improving the scraping efficiency.

[0017] It should be noted that the combined scraping structure is applicable to the following air flotation machines: The present invention provides an air flotation machine composed of a separation component, a contact component and a flocculation component. The separation assembly comprises a separation tank (1), a water outlet pipe (8), a filter screen (16), a slag discharge port (5), a slag collection tank (7), a support frame (2), a first connecting rod (3), a second connecting rod (13), a slag scraper (4), a third rotating motor (10) and a support column (14). The separation tank (1) is an arched structure with an open top. The slag collecting pool (7) is a fan-shaped structure with an opening at the top. The two ends of the separation pool (1) are in contact with the two ends of the slag collection pool (7) respectively, and the separation pool (1) and the slag collection pool (7) form a ring structure. The top height of the separation tank (1) is greater than or equal to the top height of the slag collection tank (7), The bottom surface of the slag collecting pool (7) is provided with a slag discharge port (5). A plurality of support columns (14) are located in the middle of the annular structure, and one end of each support column (14) is inserted into the ground. Preferably, the plurality of support columns (14) are arranged equidistantly along the circumference of the middle portion of the annular structure. The bottom of the support frame (2) is placed at the other end of the plurality of support columns (14). The support frame (2) is a hollow circular ring structure composed of a plurality of supporting round rods, and the middle part of the top surface of the support frame (2) is a disc-shaped structure. The third rotating motor (10) is placed in the middle of the top surface of the support frame (2). One end of the first connecting rod (3) is connected to the motor shaft of the third rotating motor (10). The angle between one end of the first connecting rod (3) and the motor shaft of the third rotating motor (10) is 90 degrees. The other end of the first connecting rod (3) is vertically placed on one end of the second connecting rod (13). The scraper plate is laterally located in the separation tank (1), and the bottom height of the scraper plate is greater than or equal to the top height of the slag collecting tank (7). Preferably, the two ends of the scraper plate are in contact with the two inner side surfaces of the separation tank (1) respectively. The other end of the second connecting rod (13) is placed on the top surface of the scraper plate (4). Preferably, the second connecting rod (13) is a retractable structure. One end of the water outlet pipe (8) is placed on a side of the separation tank (1) and is connected to the separation tank (1). The filter screen (16) is placed at one end of the water outlet pipe (8), and the diameter of the filter screen (16) is equal to the inner diameter of the water outlet pipe (8). The contact assembly is composed of a contact box (17), a blower (20), an air intake pipe (21), a connecting pipe (22), an air intake branch pipe (23), a disc aerator (24), a second rotating motor (25), a support rod (26), a rotating disc (27), rotating blades (28) and a sewage discharge pipe (9). The contact box (17) is located in the middle of the plurality of support columns (14). The second rotating motor (25) is placed in the middle of the inner bottom surface of the contact box (17). The support rod (26) is located inside the contact box (17). The length of the support rod (26) is smaller than the height of the contact box (17). One end of the support rod (26) is connected to the motor shaft of the second rotating motor (25). A rotating disc (27) is sleeved on the side of the support rod (26). Preferably, there are a plurality of rotating discs (27), and the plurality of rotating discs (27) are arranged at equal distances along the length direction of the support rod (26). The side of the rotating disc (27) is provided with rotating blades (28). Preferably, there are a plurality of rotating blades (28), and the plurality of rotating blades (28) are arranged equidistantly along the circumferential direction of the side surface of the rotating disk (27). Preferably, the rotating blade (28) is an arc-shaped structure. The blower (20) is located outside the contact box (17). One end of the air inlet pipe (21) is connected to the air outlet of the blower (20), and is in communication with the air outlet of the blower (20). The connecting pipe (22) is placed on the inner bottom surface of the contact box (17). The connecting pipe (22) is a structure with both ends closed. Preferably, the connecting pipe (22) is parallel to a side surface of the contact box (17) and is close to a side surface of the contact box (17). Preferably, the length of the connecting pipe (22) is equal to the length of one side of the contact box (17). The other end of the air inlet pipe (21) passes through a through hole opened at the bottom of one side of the contact box (17) and is placed on the side of one end of the connecting pipe (22), and is connected to the side of one end of the connecting pipe (22). One end of the air intake branch pipe (23) is vertically placed on the side of the connecting pipe (22). The air intake branch pipe (23) is a structure with the other end being closed. Preferably, there are a plurality of the air intake branch pipes (23), and the plurality of the air intake branch pipes (23) are arranged equidistantly along the length direction of the side surface of the connecting pipe (22). Preferably, the length of the air intake branch pipe (23) is equal to the length of the other side surface of the contact box (17). The disc aerator (24) is placed on the top side of the air inlet branch pipe (23). Preferably, there are a plurality of the disc aerators (24), and the plurality of the disc aerators (24) are arranged equidistantly along the length direction of the air inlet branch pipe (23). One end of a sewage discharge pipe (9) is disposed on the side surface of the contact box (17) in correspondence with each other, and one end of the sewage discharge pipe (9) is connected to the contact box (17). One end of the sewage discharge pipe (9) is close to the top surface of the contact box (17). The other end of the sewage discharge pipe (9) passes through a through hole opened on the other side of the separation tank (1) and is located on the inner bottom surface of the separation tank (1). The flocculation assembly is composed of a first rotating motor (11), a dosing hopper (12), a sewage inlet pipe (6), a rotating rod (19), a spiral blade (18), a flocculation box (15), and a water outlet hole (29). The flocculation box (15) is placed on the top surface of the contact box (17). One end of the dosing hopper (12) is placed on the top surface of the flocculation box (15) and is connected to the flocculation box (15). Preferably, the diameter of the dosing hopper (12) remains unchanged from one end to one third of the diameter, and gradually increases from one third of the diameter to the other end. The first rotating motor (11) is placed in the middle of the top surface of the flocculation box (15). The rotating rod (19) is placed in the flocculation box (15). One end of the rotating rod (19) is connected to the motor shaft of the first rotating motor (11) through a through hole opened in the middle of the flocculation box (15). The length of the rotating rod (19) is smaller than the height of the flocculation box (15). The spiral blade (18) is placed on the side of the rotating rod (19). Preferably, the length of the spiral blade (18) is equal to the length of the rotating rod (19). Preferably, a plurality of flow-disturbing protrusions are evenly arranged on the spiral blade (18). One end of the sewage inlet pipe (6) is placed on a side of the flocculation box (15) and is connected to the flocculation box (15). The bottom surface of the flocculation box (15) is provided with a water outlet hole (29), and the water outlet hole (29) is located on the side edge of the bottom surface of the flocculation box (15); Preferably, the air flotation machine is installed on the ground via a bracket, and the support column (14) is inserted into the ground for fixing. When in use, sewage first enters the flocculation box (15) through the sewage inlet pipe (6), and the flocculant is added to the flocculation box (15) from the dosing hopper (12). The first rotating motor (11) is started, and the first rotating motor (11) drives the rotating rod (19) to rotate. The rotating rod (19) drives the spiral blade (18) to rotate, so that the sewage and the flocculant are fully in contact, a flocculation reaction occurs, and floccules are formed; then the floccules and sewage enter the contact box (17) through the water outlet hole (29). The blower (20) is started, and the gas in the blower (20) enters the connecting pipe (22) from the air inlet pipe (21), enters the plurality of air inlet branches (23) from the connecting pipe (22), and enters the aeration generator from the air inlet branches (23). The aeration generator generates a large number of tiny bubbles, and the second rotating motor (25) is started. The second rotating motor (25) drives the support rod (26) to rotate, and the support rod (26) drives the rotating disk (27) and the rotating blades (28) to rotate, so that the tiny bubbles are generated. The bubbles are evenly distributed in various areas in the contact box (17), so that the floccules with a density less than that of water are fully bonded to the tiny bubbles to form floccules. Finally, the floccules and sewage enter the separation tank (1) through the sewage discharge pipe (9). The floccules float to the water surface of the separation tank (1) under the action of buoyancy to form scum. When the sewage in the separation tank (1) reaches the height of the scraper plate, the third rotating motor (10) is started, the third rotating motor (10) drives the first connecting rod (3) to rotate, the first connecting rod (3) drives the second connecting rod (13) to rotate, and the second connecting rod (13) drives the scraper plate (4) to rotate along the circumference of the separation tank (1), so as to scrape the scum on the water surface of the separation tank (1) into the scum collecting tank (7) and discharge it through the scum discharge hole, thereby achieving solid-liquid separation. The water after solid-liquid separation is further filtered through the filter screen (16) of the outlet pipe (8) and discharged from the outlet pipe (8), thereby achieving sewage treatment, improving sewage treatment efficiency and achieving better sewage treatment effect. Example 2

[0018] The difference between this embodiment and the first embodiment is that: the rotating blade (28) is provided with a flow disturbance hole (30), the flow disturbance hole (30) comprises a plurality of groups, the plurality of groups of flow disturbance holes (30) are arranged equidistantly along the length direction of the rotating blade (28), and each group comprises a plurality of flow disturbance holes (30), the plurality of flow disturbance holes (30) are arranged equidistantly along the width direction of the rotating blade (28); when in use, the flow disturbance holes (30) can further increase the contact area between the rotating blade (28) and the sewage entering the contact box (17), thereby stirring the sewage, and enabling the tiny bubbles generated by the disc aerator (24) to be evenly distributed in various areas of the contact box (17) under the action of the water flow, so that the flocs having a density less than that of water are fully bonded to the tiny bubbles, thereby generating more scum, and achieving better sewage treatment efficiency and effect; Example 3

[0019] The difference between this embodiment and embodiment 1 is that: a spoiler strip (31) is disposed on the rotating blade (28), the length of the spoiler strip (31) is equal to the width of the rotating blade (28), there are a plurality of spoiler strips (31), and each spoiler strip (31) is located between two adjacent groups of spoiler holes (30); when in use, the spoiler strip (31) and the spoiler holes (30) can further increase the contact area between the rotating blade (28) and the sewage entering the contact box (17), thereby stirring the sewage, and enabling the tiny bubbles generated by the disc aerator (24) to be evenly distributed in various areas of the contact box (17) under the action of the water flow, so that the flocs with a density less than that of water are fully bonded to the tiny bubbles, thereby generating more scum and achieving better sewage treatment efficiency and effect; The second connecting rod (13) is designed as a retractable structure. The height of the scraper plate (4) is adjusted by the second connecting rod (13) according to the height of the water surface of the separation tank (1), so that the scraper plate (4) can scrape the water surface of the separation tank (1) at different heights, thereby achieving a better scraping effect. The design in which the two ends of the scraper plate are in contact with the two inner side surfaces of the separation tank (1) respectively can increase the contact area between the scraper plate (4) and the scum floating on the water surface of the separation tank (1), thereby improving the scraping efficiency of the scraper plate (4); The diameter of the dosing hopper (12) remains constant from one end to one third of the diameter, and gradually increases from the one third of the diameter to the other end, so that the flocculant can more easily enter the flocculation box (15) through the dosing hopper (12); The spiral blade (18) is evenly provided with a plurality of flow-disturbing protrusions, which can further increase the stirring effect of the spiral blade (18) on the sewage and the flocculant entering the flocculation box, so that the sewage and the flocculant are in more complete contact, a flocculation reaction occurs, and more flocs are formed; The separation tank (1) and the slag collection tank (7) form a ring-shaped structure, and the contact component and the flocculation component are located in the middle of the ring-shaped structure. The flotation machine is more integrated as a whole, occupies a smaller area, and can be used in places with limited space. The design of the separation tank (1) and the slag collection tank (7) forming an annular structure can effectively improve the dynamic characteristics of the sewage flow, so that the sewage forms a circulation between the separation tank (1) and the slag collection tank (7), thereby obtaining a more stable fluid motion state, thereby reducing the drift of micro-bubbles in the separation tank (1), increasing the residence time of micro-bubbles, facilitating the contact between micro-bubbles and suspended particles in water, facilitating the separation and collection of slag, and improving the treatment efficiency of the flotation machine; The separation tank (1) and the slag collection tank (7) form a ring-shaped structure, which can extend the flow path of the sewage, so that the sewage is discharged from the flotation machine after being fully treated, thereby reducing the risk of short-circuiting and improving the treatment effect of the flotation machine; The design of the separation tank (1) and the slag collection tank (7) forming an annular structure can prolong the residence time of sewage in the annular separation tank (1), so that suspended particles and flocs in the water have more time to float up to become scum or settle to become sludge, thereby achieving a better solid-liquid separation effect.

[0020] The flocculation component is used to make the sewage fully contact with the flocculant, so as to produce more flocs. The contact component is used to make the flocs and tiny bubbles fully bonded, so as to produce more scum. The separation component is used to achieve solid-liquid separation, so as to improve the efficiency and effect of sewage treatment.

[0021] After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other similar embodiments of the present invention. This application is intended to cover any modified uses or adaptive changes of the present invention. These modifications or uses, applicability changes follow the general principles of the present invention and include common knowledge or customary technical means in the technical field that are not disclosed in the present invention.

[0022] It should be noted that, for the sake of simplicity, the specific implementation mode of the present invention describes the data processing process of the controller as a series of action combinations. However, those skilled in the art should know that the present invention is not limited to the described actions, because according to the present invention, certain steps can be performed sequentially or simultaneously. Secondly, those skilled in the art should also know that the actions described and involved in the specification are not necessarily required by the present invention. The described contents are only preferred implementation cases of the present invention and cannot be considered to limit the scope of implementation of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation modes and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A combined scraping structure of an air flotation machine, characterized by: The invention comprises a support plate, a scraper plate, a sub-support plate, a sub-scraper plate, a scraper groove, a sealing strip, a locking block and a locking groove, wherein the support plate is formed by a plurality of sub-support plates being spliced ​​end to end, and the angle between two adjacent sub-support plates is less than 180 degrees, one end of the sub-support plate is provided with a splicing groove, and the other end of the sub-support rod is provided with a splicing block corresponding to the splicing groove, the scraper plate is formed by a plurality of sub-scraper plates being spliced ​​end to end, the sub-scraper plates correspond to the sub-support plates one by one, the length of the sub-scraper plates is equal to the length of the sub-support plates, the sub-scraper plates are of an arc structure, the top surface of the sub-scraper plates is provided with a locking block corresponding to the locking groove, the sub-scraper plates are provided with a scraper groove, the depth of the scraper groove is less than the thickness of the sub-scraper plates, and the side of the sub-scraper plates is provided with a sealing strip, the width of the sealing strip is greater than the width of the sub-scraper plates, and the width of the sealing strip gradually decreases from one end to the other end.

2. The air flotation machine combined scraping structure according to claim 1 is characterized in that A rubber strip is arranged on the side of the sealing strip; there are a plurality of rubber strips, and the plurality of rubber strips are arranged at equal distances along the side of the sealing strip.

3. The air flotation machine combined scraping structure according to claim 1 is characterized in that A rubber prism is arranged on the side of the sealing strip, with the edges of the rubber prism facing outwards. There are a plurality of rubber prisms, and the plurality of rubber prisms are arranged without spacing along the side of the sealing strip.

4. The air flotation machine combined scraping structure according to claim 1 is characterized in that The bottom surface of the sub-support plate is provided with a clamping groove, and the depth of the clamping groove is less than the thickness of the sub-support plate.

5. The combined scraping structure of an air flotation machine according to claim 1 is characterized in that A rubber pad is arranged on the inner side of the engaging groove, and the rubber pad is used to play a sealing role when the engaging block is inserted into the engaging groove, so that the joint of the scraping plate and the supporting plate is tighter, and the loose connection between the scraping plate and the supporting plate is reduced after long-term use.

6. The combined scraping structure of an air flotation machine according to claim 1, characterized in that The scraping plate is bent in an arc shape for multiple times from one side to the other side of the connection with the engaging block, which can increase the contact area between the scraping plate and the scum, so that more scum can be scraped at one time and the scraping efficiency is higher.

7. The combined scraping structure of an air flotation machine according to claim 6, characterized in that The scraping plate is a hollow structure, and the thickness of the scraping plate gradually decreases from the center to both sides, which can reduce the weight of the scraping plate, reduce the scraping resistance, and improve the scraping efficiency.

8. The combined scraping structure of an air flotation machine according to claim 1, characterized in that The length of the scraping groove is smaller than that of the scraping plate, and the plurality of scraping grooves are staggered and equidistantly arranged along the width direction of the scraping plate, which can remove scum in a larger range, reduce the accumulation of scum on the scraping plate, reduce the risk of blockage, and improve the scraping efficiency.

9. The combined scraping structure of an air flotation machine according to claim 1, characterized in that The width of the scraping groove gradually increases from one end to the other end, and the depths of two adjacent scraping grooves are different, which can help reduce the wear of the scraping groove during the scraping process, extend the service life of the scraping plate, and can scrape off scum of different areas and different sizes in the separation tank, with higher scraping efficiency; the surface of the scraping plate is provided with an anti-stick coating, which can reduce the adhesion of scum to the scraping plate, keep the surface of the scraping plate clean, and improve the scraping efficiency.

10. The combined scraping structure of an air flotation machine according to claim 1, characterized in that The flotation machine is composed of a separation component, a contact component and a flocculation component. The separation component is composed of a separation tank, a water outlet pipe, a filter screen, a slag discharge port, a slag collection tank, a support frame, a first connecting rod, a second connecting rod, a slag scraper, a third rotating motor and a support column. The separation tank is an arched structure with an opening at the upper end, and the slag collection tank is a fan-shaped structure with an opening at the upper end. The two ends of the separation tank are respectively in contact with the two ends of the slag collection tank, and the separation tank and the slag collection tank form an annular structure. The top height of the separation tank is greater than or equal to the top height of the slag collection tank. A slag discharge port is provided on the bottom surface of the slag collection tank. A plurality of support columns are located in the middle of the annular structure, and one end of the support column is inserted into the ground. The plurality of support columns are arranged circumferentially along the middle of the annular structure. The third rotary motor is placed in the middle of the top surface of the support frame, one end of the first connecting rod is connected to the motor shaft of the third rotary motor, the angle between one end of the first connecting rod and the motor shaft of the third rotary motor is 90 degrees, the other end of the first connecting rod is vertically placed on one end of the second connecting rod, the scraping plate is horizontally located in the separation pool, and the bottom surface height of the scraping plate is greater than or equal to the top height of the slag collecting pool, the two ends of the scraping plate are respectively in contact with the two inner side surfaces of the separation pool, and the other end of the second connecting rod is placed in the middle of the top surface of the support frame. The top surface of the scraper plate, the second connecting rod is a retractable structure, one end of the water outlet pipe is placed on a side of the separation tank and is connected to the separation tank, the filter screen is placed at one end of the water outlet pipe, the diameter of the filter screen is equal to the inner diameter of the water outlet pipe, the contact assembly is composed of a contact box, a blower, an air intake pipe, a connecting pipe, an air intake branch pipe, a disc aerator, a second rotating motor, a support rod, a rotating disc, a rotating blade and a sewage pipe, the contact box is located in the middle of the multiple support columns, the second rotating motor is placed in the middle of the inner bottom surface of the contact box, the support rod is located in the contact box, the length of the support rod is less than the height of the contact box, one end of the support rod is connected to the motor shaft of the second rotating motor, and the support A rotating disc is sleeved on the side of the support rod, and there are multiple rotating discs, and the multiple rotating discs are arranged equidistantly along the length direction of the support rod. A rotating blade is arranged on the side of the rotating disc, and there are multiple rotating blades, and the multiple rotating blades are arranged equidistantly along the circumferential direction of the side of the rotating disc. The rotating blade is an arc-shaped structure. The blower is located on the outside of the contact box body, one end of the air inlet pipe is connected to the air outlet of the blower and communicated with the air outlet of the blower, and the connecting pipe is placed on the inner bottom surface of the contact box body. The connecting pipe is a closed structure at both ends, and the connecting pipe is parallel to one side of the contact box body and close to one side of the contact box body. The length of the connecting pipe is equal to the length of one side of the contact box body.The other end of the air intake pipe passes through a through hole opened at the bottom of one side of the contact box body and is placed on one end side of the connecting pipe and is connected to the side of one end of the connecting pipe. One end of the air intake branch pipe is vertically placed on the side of the connecting pipe, and the air intake branch pipe is a structure with a closed end at the other end. There are multiple air intake branch pipes, and the multiple air intake branch pipes are equidistantly arranged along the length direction of the side of the connecting pipe. The length of the air intake branch pipe is equal to the length of the other side of the contact box body. A disc aerator is placed on the top side of the air intake branch pipe. There are multiple disc aerators, and the multiple disc aerators are equidistantly arranged along the length direction of the air intake branch pipe. One end of the sewage pipe is respectively arranged on the side of the contact box body, and one end of the sewage pipe is connected to the contact box body. One end of the sewage pipe is close to the top surface of the contact box body, and the other end of the sewage pipe passes through the through hole opened on the other side of the separation tank and is located on the inner bottom surface of the separation tank. The flocculation component is driven by a first rotating motor, The invention comprises a dosing hopper, a sewage inlet pipe, a rotating rod, a spiral blade, a flocculation box and a water outlet. The flocculation box is placed on the top surface of the contact box. One end of the dosing hopper is placed on the top surface of the flocculation box and is connected to the flocculation box. The diameter of the dosing hopper remains unchanged from one end to one third of the flocculation box and gradually increases from one third of the flocculation box to the other end. The first rotating motor is placed in the middle of the top surface of the flocculation box. The rotating rod is placed in the flocculation box. One end of the rotating rod is connected to the motor shaft of the first rotating motor through a through hole opened in the middle of the flocculation box. The length of the rotating rod is less than the height of the flocculation box. The spiral blade is placed on the side of the rotating rod. The length of the spiral blade is equal to the length of the rotating rod. A plurality of flow-disturbing protrusions are evenly arranged on the spiral blade. One end of the sewage inlet pipe is placed on one side of the flocculation box and is connected to the flocculation box. A water outlet is opened on the bottom surface of the flocculation box. The water outlet is located on the side of the bottom surface of the flocculation box.

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