An air flotation scum scraping device for sewage treatment

Abstract

The present invention relates to the field of sewage treatment equipment, and discloses a gas flotation scum scraping device for sewage treatment, which includes a base. There are two bases in total. Brackets are arranged at both ends of the base. A first belt is arranged on the opposite surfaces of the brackets. An installation seat is arranged between the first belts. The installation seat is installed with a flow splitting component and a slag scraping component. The flow splitting component is used to push the scum located at the upper end to both sides. The slag scraping component is used to scrape the scum above the flotation tank. A rack is fixedly arranged at the upper end of the installation seat. An installation shaft is rotatably arranged between the brackets. The gas flotation scum scraping device for sewage treatment provided by the present invention has a slag scraping component. The slag scraping component is equipped with a scraper made of flexible material, which can give full play to its advantages and prevent reverse deformation at the end after aging. With the help of shape limiting blocks, etc., it is ensured that the end of the scraper bends towards the discharging place, avoiding the adverse guiding effect of the lower end on the scum caused by deformation.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and particularly relates to an air flotation scum scraping device for sewage treatment. Background Technique

[0002] In the patent application with the application publication number CN210457562U, it includes a sewage scraping device body. The sewage scraping device body includes a box body, the box body includes a sewage treatment tank and a sludge tank, a baffle is arranged between the sewage treatment tank and the sludge tank, a motor is arranged on the top of the box body, the motor is installed on the box body through a first fixing seat, a first pulley is arranged on the motor, the first pulley is installed on the motor through an output shaft, a fixing seat is welded on the top of the box body, a second pulley is arranged on the fixing seat, a driving gear is arranged at one end of the second pulley, a belt is arranged between the first pulley and the second pulley, a driven gear is arranged at one end of the top of the box body, a chain is arranged between the driving gear and the driven gear, a support rod is arranged on the chain, fixing plates are welded at both ends of the support rod, the fixing plates are fixed on the chain through fastening nuts, a telescopic rod is arranged on the support rod, the telescopic rod includes an inner rod one and an outer rod one, a cavity is arranged inside the outer rod one, the inner rod one is installed in the cavity of the outer rod one, a guide rail is arranged on the inner rod one, a convex block is welded on the inner wall of the outer rod one, the convex block is installed in the guide rail, a scraper is welded on the outer rod one, a groove is arranged on the top of the sewage treatment tank, a support rod is arranged in the groove, the support rod includes an inner rod two and an outer rod two, a cavity one is arranged inside the outer rod two, the inner rod two is installed in the cavity one of the outer rod two, a chute is arranged on the inner rod two, a fixing pin is arranged in the chute, a through hole is arranged on the outer rod two, the through hole cooperates with the fixing pin, a support plate is welded on the top of the inner rod two, and a switch is arranged on one side of the box body. The advantages are: The air flotation tank sewage scraping device for sewage treatment drives the scraper on the chain through gears, effectively avoiding sludge adhesion on the traditional conveyor belt and being unable to be cleaned. It is convenient for maintenance and use through the chain, and effectively extends the service life of the equipment.

[0003] In the prior art including the above patent, the material of the scraper is relatively hard, and some scum will remain at the discharge port during scum scraping; while the soft scraper used in the market, although it can prevent scum residue and enhance the scum scraping efficiency, the soft scraper will deform over time, and its end will bend in the direction opposite to the movement direction. During scum scraping, the deformed scraper will play a bad guiding role during movement. Especially when the scum thickness is large, the scum located below will be guided downward by the deformed scraper, which not only easily leads to incomplete scum scraping, but also easily causes the scum to precipitate again and affect the purification efficiency. Summary of the Invention

[0004] The problem to be solved by the present invention is: while preventing scum residue, avoiding the influence of the soft scraper on the scum scraping effect and efficiency after deformation.

[0005] To solve the above technical problems, the technical solution of the present invention is: an air flotation scum scraping device for sewage treatment, including a base. There are two bases in total. Brackets are provided at both ends of the base. A first belt is provided on the opposite sides of the brackets. An installation seat is arranged between the first belts. The installation seat installs a flow splitting component and a scum scraping component. The flow splitting component is used to push the scum at the upper end to both sides; the scum scraping component is used to scrape the scum above the air flotation tank. A rack is fixedly arranged at the upper end of the installation seat. A mounting shaft is rotatably arranged between the brackets. A second gear is fixedly arranged on the outer surface of the mounting shaft. The second gear can be engaged with the rack. A base is fixedly arranged at the upper end of the base. The base is in the shape of a portal. A bracket is fixedly arranged at the upper end of the base. The bracket is used to support the weight of the upper installation seat. A cleaning component is arranged on one side of the bracket. The cleaning component is used to clean the residual scum on the scum scraping component; the scum scraping component includes a scraper. The scraper is made of rubber. A first shape limiting block and a second shape limiting block are arranged inside the scraper. There are three first shape limiting blocks in total. After being tightened and combined, the first shape limiting blocks are arc-shaped. The center of the arc formed by the combination of the first shape limiting blocks faces the side of the discharge tank. The first shape limiting block is in the shape of a sector. There are five second shape limiting blocks in total. The second shape limiting blocks are located above the first shape limiting blocks. After being tightened and combined, the second shape limiting blocks are linear. A convex block is arranged at the upper end of the second shape limiting block. A card slot is opened in the middle of the lower end of the second shape limiting block. The convex blocks and card slots above and below the second shape limiting block can be engaged with each other so that the second shape limiting blocks can be arranged in a straight line. A rolling curtain is arranged inside the first shape limiting block and the second shape limiting block. The lower end of the rolling curtain is fixedly connected to the scraper. The lower end of the rolling curtain is not located in the middle of the scraper. A fixed shaft is fixedly arranged at the upper end of the rolling curtain. Sleeves are arranged around the rolling curtain. The center of the sleeve coincides with the center of the fixed shaft. Installation covers one are rotatably arranged at both ends of the fixed shaft. The installation covers one are fixedly connected to the sleeves. Installation covers two are rotatably arranged on the outer sides of the installation covers one. A torsion spring is arranged at the overlapping part of the installation covers one and the installation covers two. The torsion springs in the installation covers one and the installation covers two are used to provide power for the rotation of the sleeve. By rotating the sleeve, the rolling curtain can be lifted upwards, forcing the scraper to deform.

[0006] Preferably, the flow splitting component includes a rotating shaft. There are two groups of rotating shafts in total. The upper and lower ends of the rotating shaft are rotatably connected to the installation seat. A second belt is arranged on the outer surface of the rotating shaft. The second belt is rotatably connected to the installation seat. There are also two groups of second belts. The second belts are symmetrically arranged along the center line of the installation seat.

[0007] Preferably, a scraping bar is fixedly arranged on the outer surface of the second belt. The scraping bar is in a shape of "7", and the openings of the scraping bar face the bases on both sides respectively. A first gear is rotatably arranged at the upper end of one side of the second belt. The upper end of the first gear is rotatably connected to the mounting seat. A vertical shaft is meshed on one side of the first gear. The lower end of the vertical shaft is fixedly connected to the base. The vertical shaft is only arranged between the brackets.

[0008] Preferably, the rotating shaft is used to limit the position of the second belt. The scraping bar is made of a flexible material. The scraping bar, the rotating shaft and the second belt are all symmetrically arranged along the mounting seat. The two groups of scraping bars are arranged in a staggered manner.

[0009] Preferably, the cleaning assembly includes a mounting frame. The mounting frame is fixedly connected to the bracket. A spring is arranged inside one end of the mounting frame away from the bracket. The upper end of the spring is fixedly connected to the mounting frame. The length of the mounting frame is half of the length of the inner cavity of the mounting frame. A top block is fixedly arranged at the lower end of the spring.

[0010] Preferably, the top block is slidably connected to the mounting frame. A roller is arranged below the top block. Both ends of the roller are located inside the mounting frame. The lower end face of the top block is provided as a frosted surface. The lower end face of the top block is used to limit the rotation of the roller. A tooth groove is arranged on the outer surface of the middle part of the roller.

[0011] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0012] (1) By combining the slag scraping assembly with a scraping plate made of a flexible material, the advantages of the soft scraping plate can be exerted, and it can prevent the end of the scraping plate from deforming in the opposite direction of the movement after the scraping plate ages; with the help of components such as the shape limiting block one and the shape limiting block two, it can be ensured that the end of the scraping plate always bends towards the discharging place, so as to achieve this goal and avoid the adverse guiding effect of the lower end on the floating slag during the movement due to the deformation of the scraping plate.

[0013] (2) The slag scraping assembly and the cleaning assembly cooperate with each other to build an efficient cleaning mechanism; every time the cleaning assembly completes the cleaning of the floating slag on the surface of the scraping plate, it will automatically clean itself; this can effectively prevent the floating slag remaining on the surface of the slag scraping assembly from flowing back into the air flotation tank again, ensuring the purity of the water quality in the air flotation tank. It is worth mentioning that the cleaning assembly cleverly uses the slag scraping assembly to achieve self-cleaning, and this design greatly reduces the frequency of manual maintenance; it not only reduces the labor cost, but also improves the automation degree and stability of the operation of the whole equipment, ensuring the efficient and continuous progress of the slag scraping work.

[0014] (3) The setting of the flow splitting component optimizes the slag scraping process. During the slag scraping operation, it can first scrape the floating slag on the upper layer of the flotation tank to prevent excessive accumulation of the upper-layer floating slag. If the amount of floating slag scraped at one time is too large, it will increase the risk of sedimentation of the lower-layer floating slag. The flow splitting component effectively avoids this situation, which not only improves the slag scraping effect, ensures more thorough cleaning of the floating slag, but also improves the slag scraping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present invention;

[0016] Figure 2 is a schematic structure diagram of the mounting seat, the flow splitting component and the slag scraping component of the present invention;

[0017] Figure 3 is a schematic partial sectional structure diagram of the mounting seat of the present invention;

[0018] Figure 4 is a schematic three-dimensional structure diagram of the flow splitting component of the present invention;

[0019] Figure 5 is a schematic partial sectional structure diagram of the slag scraping component of the present invention;

[0020] Figure 6 of the present invention Figure 5 enlarged schematic structure diagram at A in;

[0021] Figure 7 is a schematic partial sectional structure diagram of the mounting seat of the present invention;

[0022] Figure 8 is a schematic structure diagram of the fixed shaft fixing member of the present invention;

[0023] Figure 9 is a schematic internal structure diagram of the sleeve of the present invention;

[0024] Figure 10 of the present invention Figure 9 enlarged schematic structure diagram at B in;

[0025] Figure 11 is a schematic partial three-dimensional structure diagram of the base of the present invention;

[0026] Figure 12 of the present invention Figure 11 enlarged schematic structure diagram at C in;

[0027] Figure 13 is a schematic three-dimensional structure diagram of the cleaning component of the present invention;

[0028] Figure 14 of the present invention Figure 13 enlarged schematic structure diagram at D in.

[0029] In the figure: 1. Base; 2. Bracket; 3. Belt 1; 4. Mounting seat; 5. Diverting assembly; 501. Rotating shaft; 502. Belt 2; 503. Scraping strip; 504. Gear 1; 505. Vertical shaft; 6. Slag scraping assembly; 601. Scraper; 602. Shape limiting block 1; 603. Shape limiting block 2; 604. Roller blind; 605. Fixed shaft; 606. Sleeve; 607. Mounting cover 1; 608. Mounting cover 2; 7. Rack; 8. Mounting shaft; 9. Gear 2; 10. Base; 11. Bracket; 12. Cleaning assembly; 1201. Mounting frame; 1202. Spring; 1203. Top block; 1204. Roller shaft. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "including", "comprising" or similar words used in the present disclosure mean that the elements or items appearing before such a word cover the elements or items listed after such a word and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" or similar words are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0032] As Figures 1 to 14As shown in the figure, a flotation scum scraping device for sewage treatment provided by the present invention includes a base 1. There are two bases 1 in total. Brackets 2 are provided at both ends of the base 1. A first belt 3 is provided on the opposite sides of the brackets 2. An installation seat 4 is arranged between the first belts 3. A flow splitting component 5 and a scum scraping component 6 are installed on the installation seat 4. The flow splitting component 5 is used to push the scum located at the upper end to both sides; the scum scraping component 6 is used to scrape the scum above the flotation tank. A rack 7 is fixedly arranged at the upper end of the installation seat 4. An installation shaft 8 is rotatably arranged between the brackets 2. A second gear 9 is fixedly arranged on the outer surface of the installation shaft 8. The second gear 9 can be engaged with the rack 7. A base 10 is fixedly arranged at the upper end of the base 1. The base 10 is in the shape of a portal. A bracket 11 is fixedly arranged at the upper end of the base 10. The bracket 11 is used to support the weight of the upper installation seat 4. A cleaning component 12 is arranged on one side of the bracket 2. The cleaning component 12 is used to clean the residual scum on the scum scraping component 6;

[0033] The scum scraping component 6 includes a scraper 601. The scraper 601 is made of rubber. A first shape limiting block 602 and a second shape limiting block 603 are arranged inside the scraper 601. There are three first shape limiting blocks 602 in total. After being tightened and combined, the first shape limiting blocks 602 are in an arc shape. The center of the arc formed by the combined first shape limiting blocks 602 faces the side of the discharge tank. The first shape limiting blocks 602 are in a sector shape. There are five second shape limiting blocks 603 in total. The second shape limiting blocks 603 are located above the first shape limiting blocks 602. After being tightened and combined, the second shape limiting blocks 603 are in a straight line. A convex block is arranged at the upper end of the second shape limiting block 603. A clamping groove is opened in the middle of the lower end of the second shape limiting block 603. The upper and lower convex blocks and clamping grooves of the second shape limiting block 603 can be engaged with each other so that the second shape limiting block 603 can be arranged in a straight line. A rolling curtain 604 is arranged inside the first shape limiting block 602 and the second shape limiting block 603. The lower end of the rolling curtain 604 is fixedly connected to the scraper 601. The lower end of the rolling curtain 604 is not located in the middle of the scraper 601. A fixed shaft 605 is fixedly arranged at the upper end of the rolling curtain 604. Sleeves 606 are arranged around the rolling curtain 604. The center of the sleeve 606 coincides with the center of the fixed shaft 605. Installation covers 607 are rotatably arranged at both ends of the fixed shaft 605. The installation covers 607 are fixedly connected to the sleeves 606. Installation covers 608 are rotatably arranged on the outer sides of the installation covers 607. A torsion spring is arranged at the overlapping part of the installation cover 607 and the installation cover 608. The torsion spring inside the installation cover 607 and the installation cover 608 is used to provide power for the rotation of the sleeve 606. By rotating the sleeve 606, the rolling curtain 604 can be lifted upward, forcing the scraper 601 to deform.

[0034] The diversion assembly 5 includes a rotating shaft 501. There are two groups of the rotating shafts 501 in total. The upper and lower ends of the rotating shaft 501 are both rotatably connected to the mounting seat 4. A second belt 502 is arranged on the outer surface of the rotating shaft 501. The second belt 502 is rotatably connected to the mounting seat 4. There are also two groups of the second belts 502, and the second belts 502 are symmetrically arranged along the center line of the mounting seat 4.

[0035] A scraping strip 503 is fixedly arranged on the outer surface of the second belt 502. The scraping strip 503 is set in a 7-shaped form. The openings of the scraping strip 503 face the bases 1 on both sides respectively. A first gear 504 is rotatably arranged at the upper end of one side of the second belt 502. The upper end of the first gear 504 is rotatably connected to the mounting seat 4. A vertical shaft 505 is meshed on one side of the first gear 504. The lower end of the vertical shaft 505 is fixedly connected to the base 1. The vertical shaft 505 is only arranged between the brackets 2.

[0036] The rotating shaft 501 is used to limit the position of the second belt 502. The scraping strip 503 is made of a flexible material. The scraping strip 503, the rotating shaft 501 and the second belt 502 are all symmetrically arranged along the mounting seat 4. The two groups of scraping strips 503 are arranged in a staggered manner.

[0037] The cleaning assembly 12 includes a mounting frame 1201. The mounting frame 1201 is fixedly connected to the bracket 2. A spring 1202 is arranged inside one end of the mounting frame 1201 away from the bracket 2. The upper end of the spring 1202 is fixedly connected to the mounting frame 1201. The length of the mounting frame 1201 is half of the length of the inner cavity of the mounting frame 1201. A top block 1203 is fixedly arranged at the lower end of the spring 1202.

[0038] The top block 1203 is slidably connected to the mounting frame 1201. A roller 1204 is arranged below the top block 1203. Both ends of the roller 1204 are located inside the mounting frame 1201. The lower end face of the top block 1203 is formed into a frosted surface. The lower end face of the top block 1203 is used to limit the rotation of the roller 1204. Tooth grooves are formed on the outer surface of the middle part of the roller 1204.

[0039] The working principle and usage process of the present invention: During the slag scraping operation, the sleeve 606 in the slag scraping assembly 6 rotates under the action of the torsion springs on both sides thereof; by means of the pulling force generated by the rotation of the sleeve 606, the rolling curtain 604 can pull the scraping plate 601 towards the mounting seat 4; when the scraping plate 601 is fully tightened, the shape limiting block one 602 and the shape limiting block two 603 inside it will be spliced and combined with each other; after these two shape limiting blocks are combined, a restraining effect will be exerted on the scraping plate 601, forcing it to form a predetermined shape; when the scraping plate 601 is tightened and successfully deformed, its end will bend towards the discharge place, thereby optimizing the slag scraping effect;

[0040] After the slag scraping component 6 completes a slag scraping operation, during the process of moving to the cleaning component 12, the scraping plate 601 will contact and hold against the roller 1204; as the scraping plate 601 continues to move upward, the roller 1204 will also be pushed upward together; when both ends of the roller 1204 contact the top block 1203, the rotation of the roller 1204 is restricted and it can no longer rotate freely and quickly; at this time, the tooth grooves formed on the surface of the roller 1204 come into play and can scrape off the crushed slag adhering to the scraping plate 601; during the scraping process, the roller 1204 cannot continue to move upward after reaching the top; at this time, the scraping plate 601 will bend in the opposite direction; as the scraping plate 601 continues to move, all parts of its front surface can contact the roller 1204, so as to thoroughly clean the floating slag on the front surface of the scraping plate 601 with the help of the roller 1204; when the end of the scraping plate 601 passes by the roller 1204, relying on the elasticity of the scraping plate 601 itself and the acting force of the internal torsion spring, the scraping plate 601 will first deflect the roller 1204, so that the roller 1204 can rotate at a high speed while falling; the centrifugal force generated when the roller 1204 rotates will throw out the floating slag on its surface; subsequently, after the scraping plate 601 deflects the roller 1204, it will also vibrate multiple times itself; by using the force generated by this vibration, the floating slag adhering to the other side of the scraping plate 601 can be removed, thus completing the entire self-cleaning process;

[0041] When performing the slag scraping operation, the first gears 504 on both sides of the mounting seat 4 will mesh with the vertical shaft 505; as the mounting seat 4 moves, this meshing relationship causes the first gears 504 to start rotating; after the first gears 504 rotate, they drive the second belt 502 connected thereto to rotate synchronously; when the second belt 502 rotates, the scraping strips 503 provided on its surface begin to function; these scraping strips 503 will push the floating slag located above towards both sides, so that the excess floating slag can be discharged from the corresponding position in advance.

[0042] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present invention.

Claims

1. An air flotation scum scraping device for sewage treatment, comprising a base (1), characterized in that: There are two bases (1) in total. Brackets (2) are provided at both ends of the base (1). A first belt (3) is provided on the opposite side of the brackets (2). An installation seat (4) is provided between the first belts (3). The installation seat (4) installs a flow splitting component (5) and a slag scraping component (6). The flow splitting component (5) is used to push the floating slag at the upper end to both sides; the slag scraping component (6) is used to scrape the floating slag above the flotation tank. A rack (7) is fixedly provided at the upper end of the installation seat (4). A mounting shaft (8) is rotatably provided between the brackets (2). A second gear (9) is fixedly provided on the outer surface of the mounting shaft (8). The second gear (9) can be engaged with the rack (7). A base (10) is fixedly provided at the upper end of the base (1). The base (10) is in a portal shape. A bracket (11) is fixedly provided at the upper end of the base (10). The bracket (11) is used to support the weight of the upper installation seat (4). A cleaning component (12) is provided on one side of the bracket (2). The cleaning component (12) is used to clean the residual floating slag on the slag scraping component (6); The slag scraping assembly (6) includes a scraper (601), the scraper (601) is made of rubber, and a first shape limiting block (602) and a second shape limiting block (603) are arranged inside the scraper (601). There are three first shape limiting blocks (602) in total. After the first shape limiting blocks (602) are tightened and combined, they form an arc shape. The center of the arc formed by the combination of the first shape limiting blocks (602) faces the side of the discharge tank. The first shape limiting blocks (602) are arranged in a sector shape. There are five second shape limiting blocks (603) in total. The second shape limiting blocks (603) are located above the first shape limiting blocks (602). After the second shape limiting blocks (603) are tightened and combined, they form a straight line. A convex block is arranged at the upper end of the second shape limiting block (603), and a clamping groove is formed in the middle of the lower end of the second shape limiting block (603). The convex blocks and the clamping grooves above and below the second shape limiting block (603) can be engaged with each other so that the second shape limiting blocks (603) can be arranged in a straight line. A rolling curtain (604) is arranged inside the first shape limiting block (602) and the second shape limiting block (603). The lower end of the rolling curtain (604) is fixedly connected to the scraper (601). The lower end of the rolling curtain (604) is not located in the middle of the scraper (601). A fixed shaft (605) is fixedly arranged at the upper end of the rolling curtain (604). Sleeves (606) are arranged around the rolling curtain (604). The center of the sleeve (606) coincides with the center of the fixed shaft (605). Installation covers one (607) are rotatably arranged at both ends of the fixed shaft (605). The installation covers one (607) are fixedly connected to the sleeves (606). Installation covers two (608) are rotatably arranged on the outer sides of the installation covers one (607). A torsion spring is arranged at the overlapping part of the installation cover one (607) and the installation cover two (608). The torsion spring inside the installation cover one (607) and the installation cover two (608) is used to provide power for the rotation of the sleeve (606). By rotating the sleeve (606), the rolling curtain (604) can be lifted upward, forcing the scraper (601) to deform.

2. The air flotation scum scraping device for sewage treatment according to claim 1, characterized in that: The flow splitting assembly (5) includes a rotating shaft (501). There are two groups of rotating shafts (501) in total. The upper and lower ends of the rotating shaft (501) are rotatably connected to the mounting seat (4). A second belt (502) is arranged on the outer surface of the rotating shaft (501). The second belt (502) is rotatably connected to the mounting seat (4). There are also two groups of second belts (502). The second belts (502) are symmetrically arranged along the center line of the mounting seat (4).

3. The air flotation scum scraping device for sewage treatment according to claim 2, characterized in that: A scraping strip (503) is fixedly arranged on the outer surface of the second belt (502). The scraping strip (503) is arranged in a 7-shaped form. The openings of the scraping strip (503) face the bases (1) on both sides respectively. A first gear (504) is rotatably arranged at the upper end of one side of the second belt (502). The upper end of the first gear (504) is rotatably connected to the mounting seat (4). A vertical shaft (505) is meshed on one side of the first gear (504). The lower end of the vertical shaft (505) is fixedly connected to the base (1). The vertical shaft (505) is only arranged between the brackets (2).

4. A sewage treatment air flotation scum scraping device according to claim 3, characterized in that: The rotating shaft (501) is used to limit the position of the second belt (502). The scraping strip (503) is made of a flexible material. The scraping strip (503), the rotating shaft (501) and the second belt (502) are all symmetrically arranged along the mounting seat (4). The two groups of scraping strips (503) are arranged staggeredly.

5. The air flotation scum scraping device for sewage treatment according to claim 1, wherein: The cleaning assembly (12) includes a mounting frame (1201). The mounting frame (1201) is fixedly connected to the bracket (2). A spring (1202) is arranged inside one end of the mounting frame (1201) far away from the bracket (2). The upper end of the spring (1202) is fixedly connected to the mounting frame (1201). The length of the mounting frame (1201) is half of the inner cavity length of the mounting frame (1201). A top block (1203) is fixedly arranged at the lower end of the spring (1202).

6. The air flotation scum scraping device for sewage treatment according to claim 5, characterized in that: The top block (1203) is slidably connected to the mounting frame (1201). A roller (1204) is arranged below the top block (1203). Both ends of the roller (1204) are located inside the mounting frame (1201). The lower end surface of the top block (1203) is formed into a frosted surface. The lower end surface of the top block (1203) is used to limit the rotation of the roller (1204). Tooth grooves are formed on the outer surface of the middle part of the roller (1204).

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