A filter for the return pipeline of an air flotation machine

Abstract

This invention relates to the field of air flotation machine accessories technology, and discloses an air flotation machine return pipe filter, including a filter unit and a replacement unit. The filter unit's internal filter balls can filter impurities within the water body as a whole, ensuring that impurities do not clog the air flotation machine. The internal replacement unit can rotate a turntable and a rotating shaft. The rotating shaft drives a change in position of the end shaft and a positioning protrusion, causing the positioning protrusion to flip the filter balls, turning the filter surface located at the end of the device to the front, thus achieving the purpose of replacement. Furthermore, due to the use of filter balls, the spherical shape of the filter balls ensures that the filter shell remains sealed during the flipping process, preventing water containing impurities from flowing out from the inside, improving the filtration effect, and making it suitable for widespread promotion and use.

Description

Technical Field

[0001] This invention belongs to the technical field of air flotation machine accessories, specifically, it relates to an air flotation machine return pipe filter. Background Technology

[0002] The return pipe of the dissolved air flotation (DAF) unit extends from the aeration section along the bottom of the DAF tank. While generating microbubbles, the aerator creates a negative pressure zone at the bottom of the tank with the return pipe. This negative pressure causes water to flow back from the bottom of the tank to the aeration zone and then back to the DAF section. A one-way valve is installed on the return pipe to prevent untreated wastewater from directly entering the DAF tank through the return pipe. This entire process ensures that DAF continues even when there is no inflow.

[0003] A search of CN217511353U reveals a backflow pipe filter for an air flotation machine, comprising: a body, a corrugated pipe, an inlet valve, an inlet pipe, a first backflow pipe, an outlet pipe, an outlet valve, a second backflow pipe, an interception net, and a filter screen; the body has two symmetrically arranged sections; the left end of the body is connected to the corrugated pipe via a union; the left end of the corrugated pipe is threadedly connected to the inlet valve; the left end of the inlet valve is threadedly connected to the inlet pipe; the inlet pipe is welded to the side of the first backflow pipe; the right end of the body is connected to the outlet pipe via a union; the middle part of the outlet pipe is threadedly connected to the outlet valve; this utility model, through improvements to the above structure, has a reasonable structure, can intercept and filter impurities and lint in the water, the dissolved air release device is not easily clogged, the filter screen is not easily clogged, and it is easy to install.

[0004] However, through exploration, the inventors have discovered that this technical solution still has at least the following defects: After prolonged use, although the interception net can filter the surface of the filter screen, when the surface of the interception net is completely blocked by impurities, the interception net will directly block the water flow, causing the return pipe of the air flotation machine to become blocked and affecting the normal use of the air flotation machine.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] To address the technical problem that interception nets directly block the entire water flow, causing blockages in the return pipes of the air flotation unit and affecting its normal operation, the basic concept of the technical solution adopted in this invention is as follows: A filter for the return pipeline of an air flotation machine includes a filter unit, a replacement unit, a dredging unit, a collection unit, and a locking unit. The filter unit includes a filter housing, an internal flow cavity is provided inside the filter housing, a filter ball is movably installed inside the internal flow cavity, and the front and rear side walls of the filter ball are movably connected to the internal flow cavity. Filter holes are provided laterally inside the filter ball. The replacement unit includes a rotating shaft, the end of which is fitted with a rotating shaft. The end of the rotating shaft is engaged with the side wall of the filter ball, and the rotating shaft and the rotating shaft are placed in the cavity inside the filter ball. The unblocking unit includes a pair of unblocking plates, and several pairs of unblocking rods are fixedly installed on the side wall of each unblocking plate. Each unblocking rod is horizontally corresponding to the filter hole, and the end of each unblocking rod is equidistant from the filter ball. The side wall of the unblocking plate is movably connected to an adjusting plate fixed to the side wall of the rotating shaft. The locking unit includes two locking blocks, which are respectively movably positioned on the upper and lower sides of the filter housing and are movably engaged with the filter ball. A push rod is installed at the bottom of the locking block located at the bottom.

[0007] The collection unit includes a collection box, a sealing plate is installed on the top of the collection box, and a connecting rod is installed on the bottom of the sealing plate. The connecting rod is slidably connected to the push rod.

[0008] In a preferred embodiment of the present invention, connecting pipes are fixedly installed at both ends of the filter housing, the connecting pipes are in communication with the flow cavity, and mounting ears are installed at both ends of the connecting pipes, with corresponding positioning holes opened at both ends of the mounting ears.

[0009] In a preferred embodiment of the present invention, a circular mounting block is fixedly installed on the inner sidewall of the filter ball, a rotating hole is installed through the inside of the circular mounting block, a rotating shaft is installed through the inside of the rotating hole, one end of the rotating shaft is movably installed through the bearing installed inside the filter housing, a notch is opened on the sidewall of the rotating hole, a positioning protrusion is installed on the surface of the rotating shaft, the positioning protrusion is engaged inside the notch, and a turntable is installed at the end of the rotating shaft located outside the filter housing.

[0010] In a preferred embodiment of the present invention, the surface of the adjusting plate is provided with an inclined groove. The horizontal distance from each position on the inclined groove to the edge of the adjusting plate is not equal. The end of the inclined groove near the inner side of the rotating shaft is the lowest point. The angle of inclination of the inclined groove is the same as the angle of the notch.

[0011] In a preferred embodiment of the present invention, a slide rod is slidably installed on the surface of the inclined chute, a slide seat is installed on the outer wall of the slide rod, a synchronous insertion rod is installed on the side wall of the slide seat, a synchronous rod is movably inserted between adjacent synchronous insertion rods, a limiting crossbar is movably inserted on the side wall of the synchronous insertion rod, both ends of the limiting crossbar are fixedly installed on the inner wall of the filter ball, and a dredging plate is installed at the end of the limiting crossbar.

[0012] In a preferred embodiment of the present invention, a positioning cover is installed on the upper and lower side walls of the filter ball, and a locking block is snapped into the inside of the positioning cover. One side surface of the locking block is chamfered, and the chamfer height of the locking block is higher than the depth of the positioning cover.

[0013] In a preferred embodiment of the present invention, a first mounting groove is provided at the bottom of the filter housing, a baffle is slidably installed inside the first mounting groove, a locking block is installed on the top of the baffle, the push rod moves through the first mounting groove, and a compression spring is sleeved on the outer wall of the push rod located inside the first mounting groove. One side of the compression spring is locked to the bottom of the first mounting groove, and the other side is locked to the bottom of the baffle.

[0014] In a preferred embodiment of the present invention, a second mounting groove is provided at the bottom of the filter housing, a connecting rod is movably inserted into the second mounting groove, a guide block is installed at the end of the connecting rod located in the second mounting groove, the guide block is in an inclined state, a guide wheel is slidably installed on the upper surface of the guide block, and the central shaft of the guide wheel is movably connected to the bottom of the push rod, and a reset spring is snapped between the inner wall of the second mounting groove and the side wall of the guide block.

[0015] In a preferred embodiment of the present invention, a guide ramp is provided at the inlet of the collection box, and the guide ramp is inclined. A drain pipe is installed at the bottom of the collection box, the bottom of the collection box is funnel-shaped, and an electronic valve is installed on the drain pipe.

[0016] In a preferred embodiment of the present invention, a sealing sleeve is installed at the inlet of the collection box, a sealing cavity is provided inside the sealing sleeve, a sealing plate is slidably installed inside the sealing cavity, and a scraper is installed on the outer wall of the inlet of the collection box. The scraper is arc-shaped and its size is adapted to the filter ball, and the scraper and the side wall of the filter ball are in close contact with each other.

[0017] Compared with the prior art, the present invention has the following advantages: 1. The system is equipped with a filtration unit and a replacement unit. The filter balls inside the filtration unit can filter all impurities in the water, ensuring that impurities do not clog the flotation machine. The replacement unit can rotate a turntable and a rotating shaft. The rotating shaft drives the rotating shaft at the end and the positioning protrusion to change position. The positioning protrusion flips the filter balls, turning the filter surface at the end of the equipment to the front, thus achieving the purpose of replacement. Because of the use of filter balls, the spheres of the filter balls ensure that the filter shell can always be sealed during the flipping process, preventing water containing impurities from flowing out from the inside and improving the filtration effect.

[0018] 2. Equipped with a dredging unit and a collection unit, the dredging unit moves the dredging plates on both sides outward as the filter ball rotates, inserting the dredging rod into the filter hole to unclog the particles blocking it. During the filter ball's rotation, the surface scraper cleans the entire filter ball. The cleaned impurities are collected in the collection box, and after the filter ball has finished rotating, the sealing plate inside the collection box automatically closes, preventing impurities from re-clogging the filter ball, reducing the frequency of filter ball replacement, and increasing work efficiency.

[0019] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a return pipeline filter for an air flotation machine. Figure 2 A partial cross-sectional view (a) of a return pipeline filter for an air flotation machine; Figure 3 For a type of air flotation machine return pipeline filter Figure 2 Enlarged view of point A in the image; Figure 4 Partial cross-sectional view (II) of a return pipeline filter for an air flotation machine; Figure 5 A filter for the return pipeline of an air flotation machine Figure 4 Enlarged view of point B in the image; Figure 6 A filter for the return pipeline of an air flotation machine Figure 4 Enlarged view of point C in the image; Figure 7 A cross-sectional view of the locking unit of a return pipe filter for an air flotation machine.

[0021] In the picture: 100. Filter unit; 101. Filter housing; 1011. Flow cavity; 1012. First mounting groove; 1013. Second mounting groove; 102. Connecting pipe; 1021. Mounting ear; 1022. Positioning hole; 103. Filter ball; 1031. Filter hole; 1032. Limiting crossbar; 1033. Positioning cover; 104. Circular mounting block; 1041. Notch; 1042. Rotary hole; 200. Replacement unit; 201. Turntable; 2011. Rotating shaft; 2012. Rotating shaft; 2013. Positioning protrusion; 300. Unblocking unit; 301. Unblocking plate; 3011. Unblocking rod; 302. Adjusting disc; 3021. Inclined chute; 303. Synchronous insertion rod; 3031. Synchronous rod; 304. Slide seat; 3041. Slide rod; 305. Scraper; 400. Collection unit; 401. Collection box; 4011. Guide slope; 4012. Sewage pipe; 4013. Electronic valve; 402. Sealing sleeve; 4021. Sealing slide cavity; 4022. Sealing plate; 403. Connecting rod; 4031. Guide block; 4032. Return spring; 500, Locking unit; 501, Locking block; 5011, Baffle; 502, Push rod; 5021, Guide wheel; 5022, Compression spring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0023] Example 1: like Figures 1 to 7 As shown, a return pipe filter for an air flotation machine includes a filter unit 100, a replacement unit 200, a dredging unit 300, a collection unit 400, and a locking unit 500. The filter unit 100 includes a filter housing 101, a flow cavity 1011 is formed inside the filter housing 101, a filter ball 103 is movably installed inside the flow cavity 1011, and the front and rear side walls of the filter ball 103 are movably connected to the flow cavity 1011. A filter hole 1031 is formed laterally inside the filter ball 103. The replacement unit 200 includes a rotating shaft 2011, a rotating shaft 2012 is installed at the end of the rotating shaft 2011, the end of the rotating shaft 2012 is engaged with the side wall of the filter ball 103, and the rotating shaft 2012 and the rotating shaft 2011 are placed in the cavity inside the filter ball 103. The system incorporates a filtration unit and a replacement unit. The filter balls inside the filtration unit effectively filter impurities from the water, preventing them from clogging the flotation machine. The replacement unit rotates a turntable and a rotating shaft. The rotating shaft causes a change in the position of the end shaft and positioning protrusions, which in turn flip the filter balls, moving the filter surface from the end of the device to the front. This achieves the purpose of replacement. Furthermore, the use of filter balls ensures that the filter housing remains sealed during the flipping process, preventing water containing impurities from flowing out and improving the filtration efficiency.

[0024] The unblocking unit 300 includes a pair of unblocking plates 301. Several pairs of unblocking rods 3011 are fixedly installed on the side wall of each unblocking plate 301. Each unblocking rod 3011 is horizontally corresponding to the filter hole 1031, and the end of each unblocking rod 3011 is equidistant from the filter ball 103. The side wall of the unblocking plate 301 is movably connected to the adjusting plate 302 fixed on the side wall of the rotating shaft 2011. The locking unit 500 includes two locking blocks 501, which are movably positioned on the upper and lower sides of the filter housing 101, respectively, and are movably engaged with the filter ball 103. A push rod 502 is installed at the bottom of the locking block 501 located at the bottom. The collection unit 400 includes a collection box 401, a sealing plate 4022 is installed on the top of the collection box 401, and a connecting rod 403 is installed at the bottom of the sealing plate 4022. The connecting rod 403 is slidably connected to the push rod 502.

[0025] Equipped with a dredging unit and a collection unit, the dredging unit moves the dredging plates on both sides outward as the filter ball rotates, inserting the dredging rod into the filter hole to unclog the particles blocking it. During the filter ball's rotation, the surface scraper cleans the entire filter ball. The cleaned impurities are collected in a collection box, and after the filter ball has finished rotating, the sealing plate inside the collection box automatically closes, preventing impurities from re-clogging the filter ball, reducing the frequency of filter ball replacement, and increasing work efficiency.

[0026] like Figures 1 to 7 As shown, in a specific embodiment, connecting pipes 102 are fixedly installed at both ends of the filter housing 101. The connecting pipes 102 communicate with the flow cavity 1011. Mounting ears 1021 are installed at both ends of the connecting pipes 102, and corresponding positioning holes 1022 are provided at both ends of the mounting ears 1021. First, the device is installed on the air flotation machine's return pipe. The connecting pipes 102 and the air flotation machine's return pipe are connected to each other, and bolts are inserted into the positioning holes 1022 to complete the installation operation, ensuring the sealing of the connection.

[0027] like Figures 1 to 7 As shown, a circular mounting block 104 is fixedly installed on the inner wall of the filter ball 103. A rotating hole 1042 is installed through the circular mounting block 104, and a rotating shaft 2012 is installed through the rotating hole 1042. One end of the rotating shaft 2012 is movably installed through a bearing installed inside the filter housing 101. A notch 1041 is provided on the side wall of the rotating hole 1042. A positioning protrusion 2013 is installed on the surface of the rotating shaft 2012, and the positioning protrusion 2013 is engaged inside the notch 1041. A turntable 201 is installed at the end of the rotating shaft 2012 located outside the filter housing 101. During the rotation of the rotating shaft 2011, the surface of the rotating shaft 2012 rotates in the same way, and the positioning protrusion 2013 on the surface of the rotating shaft 2012 rotates to the end of the notch 1041. When the rotating shaft 2012 is rotated, the positioning protrusion 2013 on the surface of the rotating shaft 2012 presses against the notch 1041, causing the circular mounting block 104 and the filter ball 103 with the notch 1041 to rotate.

[0028] Example 2: The difference between the above embodiments and this embodiment is that: like Figures 1 to 7 As shown, the surface of the adjusting disc 302 is provided with an inclined groove 3021. The horizontal distance from each position on the inclined groove 3021 to the edge of the adjusting disc 302 is not equal. The end of the inclined groove 3021 near the inner side of the rotating shaft 2011 is the lowest point. The angle of inclination of the inclined groove 3021 is the same as the angle of the notch 1041. A slide rod 3041 is slidably installed on the surface of the inclined groove 3021. A slide seat 304 is installed on the outer wall of the slide rod 3041. A synchronous insertion rod 303 is installed on the side wall of the slide seat 304. A synchronous rod 3031 is movably inserted between adjacent synchronous insertion rods 303. A limiting crossbar 1032 is movably inserted into the side wall of the synchronous insertion rod 303. The two ends of the limiting crossbar 1032 are fixedly installed on the inner wall of the filter ball 103. A drainage plate 301 is installed at the end of the limiting crossbar 1032. When the rotating shaft 2011 rotates, it drives the surface-mounted adjusting plate 302 to rotate. After the adjusting plate 302 rotates, it causes the inclined slide groove 3021 on the side wall of the adjusting plate 302 to shift in position. Since the inclined slide groove 3021 is in an inclined state, the rotation of the inclined slide groove 3021 will drive the slide rod 3041 and the slide seat 304 on the side wall to move outward. The slide seat 304 is equipped with a synchronous insertion rod 303. The synchronous insertion rod 303 pushes the end unblocking plate 301 and the unblocking rod 3011 to move outward synchronously, inserting the unblocking rod 3011 into the filter hole 1031. This makes the surface of the filter ball 103 a whole, pushing the impurities blocking the filter hole 1031 outward.

[0029] like Figures 1 to 7 As shown, furthermore, positioning covers 1033 are installed on the upper and lower side walls of the filter ball 103. A locking block 501 is snapped into the inside of the positioning cover 1033. One surface of the locking block 501 is chamfered, and the chamfer height of the locking block 501 is greater than the depth of the positioning cover 1033. When the filter ball 103 needs to rotate, the positioning cover 1033 rotates synchronously, pressing against the locking block 501 at the bottom and pushing the locking block 501 downwards as a whole.

[0030] Example 3: The difference between the above embodiments and this embodiment is that: like Figures 1 to 7As shown, a first mounting groove 1012 is provided at the bottom of the filter housing 101. A baffle 5011 is slidably installed inside the first mounting groove 1012. A locking block 501 is installed on the top of the baffle 5011. A push rod 502 moves through the first mounting groove 1012. A compression spring 5022 is sleeved on the outer wall of the push rod 502 located inside the first mounting groove 1012. One side of the compression spring 5022 is locked to the bottom of the first mounting groove 1012, and the other side is locked to the bottom of the baffle 5011. The baffle 5011 at the bottom of the locking block 501 slides downward inside the first mounting groove 1012, pushing the push rod 502 at the bottom to move downward simultaneously. At the same time, the compression spring 5022 is compressed, facilitating subsequent reset operations.

[0031] like Figures 1 to 7 As shown, in a specific embodiment, a second mounting groove 1013 is provided at the bottom of the filter housing 101. A connecting rod 403 is movably inserted into the second mounting groove 1013. A guide block 4031 is installed at the end of the connecting rod 403 in the second mounting groove 1013. The guide block 4031 is in an inclined state. A guide wheel 5021 is slidably installed on the upper surface of the guide block 4031, and the central axis of the guide wheel 5021 is movably connected to the bottom of the push rod 502. A return spring 4032 is engaged between the inner wall of the second mounting groove 1013 and the side wall of the guide block 4031. When the push rod 502 moves downward, it drives the bottom guide wheel 5021 to move downward simultaneously, squeezing the guide block 4031. Since the guide block 4031 is in an inclined state, it pushes the guide block 4031 to move to the left, driving the connecting rod 403 to move to the left simultaneously. At this time, the return spring 5022 is compressed, which facilitates subsequent reset.

[0032] like Figures 1 to 7 As shown, furthermore, a guide slope 4011 is provided at the inlet of the collection box 401, and the guide slope 4011 is in an inclined state. A drain pipe 4012 is installed at the bottom of the collection box 401. The bottom of the collection box 401 is funnel-shaped, and an electronic valve 4013 is installed on the drain pipe 4012. A sealing sleeve 402 is installed at the inlet of the collection box 401. A sealing slide cavity 4021 is opened inside the sealing sleeve 402. A sealing plate 4022 is slidably installed inside the sealing slide cavity 4021. A scraper 305 is installed on the outer wall of the inlet of the collection box 401. The scraper 305 is arc-shaped, and the scraper 305 is adapted to the size of the filter ball 103. The scraper 305 and the side wall of the filter ball 103 are in close contact with each other. After the connecting rod 403 moves to the left, it pushes the sealing plate 4022 at the end onto the sealing slide cavity 4021 inside the sealing sleeve 402, thus opening the inner collection box 401 as a whole. The filter ball 103 then rotates, and the scraper 305 easily scrapes away impurities, which are then collected inside the collection box 401. Once a certain amount has been collected, the drain pipe 4012 is opened via the electronic valve 4013, allowing the entire collection of impurities to be discharged.

[0033] The implementation principle of a return pipeline filter for an air flotation machine is as follows: When the device is needed, it is first installed on the return pipe of the air flotation machine. The device is connected to the return pipe of the air flotation machine through the connecting pipe 102, and bolts are inserted into the positioning hole 1022 to complete the installation operation and ensure the sealing of the connection.

[0034] During normal filtration, water flows through the connecting pipe 102 into the flow cavity 1011 inside the filter housing 101, and then is filtered from inside the filter ball 103. The filtered impurities are located on the surface of the filter ball 103, thus completing the filtration of impurities in the water.

[0035] When the water-facing side of the filter ball 103 is blocked, the operator needs to rotate the turntable 201, which in turn drives the internal rotating shafts 2011 and 2012 to rotate.

[0036] When the rotating shaft 2011 rotates, it drives the surface-mounted adjusting plate 302 to rotate. After the adjusting plate 302 rotates, it causes the inclined slide groove 3021 on the side wall of the adjusting plate 302 to shift in position. Since the inclined slide groove 3021 is in an inclined state, the rotation of the inclined slide groove 3021 will drive the slide rod 3041 and the slide seat 304 on the side wall to move outward. The slide seat 304 is equipped with a synchronous insertion rod 303. The synchronous insertion rod 303 pushes the end unblocking plate 301 and the unblocking rod 3011 to move outward synchronously, inserting the unblocking rod 3011 into the filter hole 1031. At this time, the surface of the filter ball 103 is a whole, pushing the impurities blocked in the filter hole 1031 outward.

[0037] During the rotation of the rotating shaft 2011, the surface of the rotating shaft 2012 rotates in the same way, and the positioning protrusion 2013 on the surface of the rotating shaft 2012 rotates to the end of the notch 1041.

[0038] When the rotating shaft 2012 is rotated, the positioning protrusion 2013 on the surface of the rotating shaft 2012 presses against the notch 1041, causing the circular mounting block 104 with the notch 1041 and the filter ball 103 to rotate. The unblocking plate 301 and the unblocking rod 3011 on the surface of the filter ball 103 rotate synchronously, ensuring that the unblocking plate 301 and the unblocking rod 3011 are always blocked in the filter hole.

[0039] After the filter ball 103 needs to rotate, the positioning cover 1033 rotates synchronously and presses against the bottom locking block 501, pushing the locking block 501 to move downward as a whole. Meanwhile, the baffle 5011 at the bottom of the locking block 501 slides downward inside the first mounting groove 1012, pushing the bottom push rod 502 to move downward synchronously. At the same time, the compression spring 5022 is compressed, which facilitates the subsequent reset operation.

[0040] Push rod 502 moves downward, causing bottom guide wheel 5021 to move downward synchronously, squeezing guide block 4031 at this time. Since guide block 4031 is in an inclined state, push guide block 4031 to move to the left, causing connecting rod 403 to move to the left synchronously. At this time, reset spring 5022 is compressed, and the compressed reset spring 5022 facilitates subsequent reset.

[0041] After the connecting rod 403 moves to the left, it pushes the sealing plate 4022 at the end to move onto the sealing slide cavity 4021 inside the sealing sleeve 402, and opens the inner collection box 401 as a whole. After the filter ball 103 rotates, the impurities can be easily scraped off by the scraper 305 and collected into the collection box 401.

[0042] After the filter ball 103 rotates 180 degrees, the positioning cover 1033 at the top is re-clamped inside the locking block 501 and reset by the spring. Finally, the sealing plate 4022 seals the entire collection box 401. The rotated filter ball 103 moves the filter surface at the rear, which is not easily blocked, to the front, thereby achieving the purpose of replacement and ensuring filtration efficiency. During the rotation, the filter surface at the front is also unblocked and cleaned, which is convenient for later reuse.

Claims

1. A filter for the return pipeline of an air flotation machine, comprising a filter unit (100), a replacement unit (200), a dredging unit (300), a collection unit (400), and a locking unit (500), characterized in that, The filter unit (100) includes a filter housing (101), and a flow cavity (1011) is provided inside the filter housing (101). A filter ball (103) is movably installed inside the flow cavity (1011), and the front and rear side walls of the filter ball (103) are movably connected to the flow cavity (1011). A filter hole (1031) is provided laterally inside the filter ball (103). The replacement unit (200) includes a rotating shaft (2011), and a rotating shaft (2012) is installed at the end of the rotating shaft (2011). The end of the rotating shaft (2012) is engaged with the side wall of the filter ball (103), and the rotating shaft (2012) and the rotating shaft (2011) are placed in the cavity inside the filter ball (103). The unblocking unit (300) includes a pair of unblocking plates (301), and several pairs of unblocking rods (3011) are fixedly installed on the side wall of each unblocking plate (301). Each unblocking rod (3011) is horizontally corresponding to the filter hole (1031), and the end of each unblocking rod (3011) is equidistant from the filter ball (103). The side wall of the unblocking plate (301) is movably connected to the adjusting plate (302) fixed on the side wall of the rotating shaft (2011). The surface of the adjusting plate (302) is provided with an inclined groove (3021). The horizontal distance from each position on the inclined groove (3021) to the edge of the adjusting plate (302) is not equal. The end of the inclined groove (3021) near the inner side of the rotating shaft (2011) is the lowest point. The angle of inclination of the inclined groove (3021) is the same as the angle of the notch (1041). A slide rod (3041) is slidably installed on the surface of the inclined chute (3021). A slide seat (304) is installed on the outer wall of the slide rod (3041). A synchronous insertion rod (303) is installed on the side wall of the slide seat (304). A synchronous rod (3031) is movably inserted between adjacent synchronous insertion rods (303). A limiting crossbar (1032) is movably inserted on the side wall of the synchronous insertion rod (303). Both ends of the limiting crossbar (1032) are fixedly installed on the inner wall of the filter ball (103). A dredging plate (301) is installed at the end of the limiting crossbar (1032). The locking unit (500) includes two locking blocks (501), which are respectively movably placed on the upper and lower sides of the filter housing (101), and the locking blocks (501) are movably engaged with the filter ball (103). A push rod (502) is installed at the bottom of the locking block (501) located at the bottom. The collection unit (400) includes a collection box (401), a sealing plate (4022) is installed on the top of the collection box (401), and a connecting rod (403) is installed on the bottom of the sealing plate (4022). The connecting rod (403) is slidably connected to the push rod (502).

2. The air flotation machine return pipeline filter according to claim 1, characterized in that, The filter housing (101) is fixedly installed with connecting pipes (102) at both ends. The connecting pipes (102) are connected to the flow cavity (1011). The connecting pipes (102) are installed with mounting ears (1021) at both ends. The mounting ears (1021) are provided with corresponding positioning holes (1022) at both ends.

3. A return pipeline filter for an air flotation machine according to claim 1, characterized in that, A circular mounting block (104) is fixedly installed on the inner side wall of the filter ball (103). A rotating hole (1042) is installed through the inside of the circular mounting block (104). A rotating shaft (2012) is installed through the inside of the rotating hole (1042). One end of the rotating shaft (2012) is movably installed through the bearing installed inside the filter housing (101). A notch (1041) is opened on the side wall of the rotating hole (1042). A positioning protrusion (2013) is installed on the surface of the rotating shaft (2012). The positioning protrusion (2013) is engaged inside the notch (1041). A turntable (201) is installed at the end of the rotating shaft (2012) located outside the filter housing (101).

4. A return pipeline filter for an air flotation machine according to claim 1, characterized in that, The filter ball (103) is equipped with a positioning cover (1033) on its upper and lower side walls. A locking block (501) is snapped into the inside of the positioning cover (1033). One side surface of the locking block (501) is chamfered, and the chamfer height of the locking block (501) is higher than the depth of the positioning cover (1033).

5. A return pipeline filter for an air flotation machine according to claim 1, characterized in that, The filter housing (101) has a first mounting groove (1012) at the bottom. A baffle (5011) is slidably installed inside the first mounting groove (1012). A locking block (501) is installed on the top of the baffle (5011). The push rod (502) moves through the first mounting groove (1012). A compression spring (5022) is sleeved on the outer wall of the push rod (502) inside the first mounting groove (1012). One side of the compression spring (5022) is locked to the bottom of the first mounting groove (1012), and the other side is locked to the bottom of the baffle (5011).

6. A return pipeline filter for an air flotation machine according to claim 1, characterized in that, The filter housing (101) has a second mounting groove (1013) at the bottom. A connecting rod (403) is movably inserted into the second mounting groove (1013). A guide block (4031) is installed at the end of the connecting rod (403) in the second mounting groove (1013). The guide block (4031) is in an inclined state. A guide wheel (5021) is slidably installed on the upper surface of the guide block (4031). The central axis of the guide wheel (5021) is movably connected to the bottom of the push rod (502). A reset spring (4032) is snapped between the inner wall of the second mounting groove (1013) and the side wall of the guide block (4031).

7. A return pipeline filter for an air flotation machine according to claim 1, characterized in that, The collection box (401) is provided with a guide slope (4011) at the inlet, and the guide slope (4011) is in an inclined state. A sewage pipe (4012) is installed at the bottom of the collection box (401). The bottom of the collection box (401) is funnel-shaped, and an electronic valve (4013) is installed on the sewage pipe (4012).

8. A return pipeline filter for an air flotation machine according to claim 1, characterized in that, A sealing sleeve (402) is installed at the inlet of the collection box (401). A sealing cavity (4021) is provided inside the sealing sleeve (402). A sealing plate (4022) is slidably installed inside the sealing cavity (4021). A scraper (305) is installed on the outer wall of the inlet of the collection box (401). The scraper (305) is arc-shaped and its size is adapted to the filter ball (103). The scraper (305) and the side wall of the filter ball (103) are in close contact with each other.

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