Self-cleaning flotation device

Abstract

The invention discloses a self-cleaning flotation device, and relates to the technical field of battery recycling, the self-cleaning flotation device comprises a supporting plate, a bottom plate is cooperatively mounted on the supporting plate, a stirring cylinder is cooperatively mounted on the bottom plate, a mounting bracket is fixedly mounted in the stirring cylinder, and a first rotating shaft is cooperatively mounted between the mounting bracket and the stirring cylinder; a plurality of first stirring rods are fixedly mounted on the first rotating shaft in a sleeving manner, a cleaning plate is mounted at one end of each first stirring rod in a matched manner, a cleaning scraping plate is in magnetic attraction fit with a magnetic attraction plate, a feeding hopper is mounted on the stirring cylinder in a matched manner, and a fourth driving motor is mounted on the stirring cylinder in a matched manner; and the fourth driving motor is in driving connection with the first rotating shaft. According to the cleaning device, filtered cleaning liquid can be discharged into the backflow plate, so that the liquid level in the stirring barrel is washed, the use amount of the cleaning liquid is greatly reduced, and the effect of effectively differentiating metal materials from other materials can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of battery recycling and reuse, in particular to a self-cleaning flotation device. Background Art

[0002] Flotation devices for battery recycling play an important role in the field of waste battery resource recovery technology, especially in the recycling of waste lithium batteries. These flotation devices effectively separate different components in waste batteries through specific physical and chemical processes, such as broken battery plastic shells, rubber seals, metal fragments, etc., for subsequent recycling.

[0003] When the current flotation device is used, the crushed battery material is generally directly put into the sedimentation tank. After waiting for a period of time, the precipitated metal material is separated and recovered from the material floating on the surface of the cleaning liquid. However, during operation, the surface of the plastic and other materials floating on the surface of the cleaning liquid will also contain certain small metal particles. These small metal particles cannot be effectively recovered, and after a period of use, a large amount of metal precipitation will be attached to the inside of the flotation device, making the sanitation inside the flotation device worrying. For this reason, a self-cleaning flotation device is proposed. Summary of the invention

[0004] In order to solve the problem that small metal particles cannot be effectively recovered as mentioned in the background art, the present invention aims to provide a self-cleaning flotation device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-cleaning flotation device comprises a support plate, a bottom plate is installed on the support plate, a stirring drum is installed on the bottom plate, a mounting bracket is fixedly installed in the stirring drum, a first rotating shaft is installed between the mounting bracket and the stirring drum, a plurality of first stirring rods are sleeved and fixedly installed on the first rotating shaft, a cleaning plate is installed on one end of the first stirring rod, a movable groove is provided on one side of the cleaning plate, a cleaning scraper is slidably installed in the movable groove, a plurality of protective shells are installed on the outer side of the stirring drum, a magnetic plate is installed in the protective shell, the protective shell is fixed by a fixing hoop, the stirring drum is made of plastic, the cleaning scraper is magnetically matched with the magnetic plate, a feeding hopper is installed on the stirring drum, a fourth driving motor is installed on the stirring drum, and the fourth driving motor is drivingly connected to the first rotating shaft.

[0006] Preferably, a first discharge rod is installed on one side of the bottom plate, a first discharge trough is opened in the bottom plate, the first discharge trough extends into the first discharge rod, a first spiral rod is installed in the first discharge trough, and a reflux plate is installed in the stirring cylinder.

[0007] Preferably, a first drive motor is installed at one end of the first discharging rod, and the first drive motor is connected to the first screw rod through a corresponding belt and pulley drive. A first discharging pipe is installed on the lower side of the first discharging rod, and a first solenoid valve is installed on the first discharging pipe.

[0008] Preferably, a flotation hole is provided on the stirring cylinder, a flotation box is installed on one side of the stirring cylinder, a second solenoid valve is installed on one side of the flotation box, the stirring cylinder is connected to the inside of the flotation box through the flotation hole, a liquid inlet pipe is installed on the flotation box, the liquid inlet pipe extends into the flotation box, a floating plate is installed at one end of the liquid inlet pipe located inside the flotation box, a plurality of liquid outlet holes are provided on the floating plate, a first limit plate is installed on the lower side of the float plate, and two second limit plates arranged oppositely are installed in the flotation box.

[0009] Preferably, the second limit plate is an arc plate, so that a trumpet-shaped cross-section is formed between the two second limit plates, and the first limit plate is located between the two second limit plates. A second rotating shaft is installed in the flotation box, and a plurality of second stirring rods are installed on the second rotating shaft. A third drive motor is installed on one side of the flotation box, and the third drive motor drives the second rotating shaft.

[0010] Preferably, a second discharging rod is installed at one end of the flotation box, a second spiral rod is installed inside the flotation box, the second spiral rod is located between the first limit plate and the two second limit plates, the second spiral rod extends into the second discharging rod, a third discharging pipe is installed on the outer side of the second discharging rod, a fourth solenoid valve is installed on the third discharging pipe, a second drive motor is installed at one end of the second discharging rod, and the second drive motor drives the second spiral rod.

[0011] Preferably, an emergency drain pipe is installed on one side of the flotation box, a second discharge pipe is installed on the lower side of the flotation box, a third solenoid valve is installed on the second discharge pipe, a support bracket is installed on the support plate, a filter cartridge is installed on the support bracket, and the filter cartridge is connected to the flotation box through the second discharge pipe.

[0012] Preferably, a hydraulic cylinder is mounted on one side of the filter cartridge, a piston of the hydraulic cylinder is movably mounted on a compression piston, a filter plate is fixedly mounted in the filter cartridge, and the second discharge pipe is located between the compression piston and the filter plate.

[0013] Preferably, an air intake pipe is installed on one side of the filter cartridge, a fifth solenoid valve is installed on the air intake pipe, a baffle is installed inside the filter cartridge, the baffle is arranged corresponding to the air intake pipe, a return pipe is also installed on one side of the filter cartridge, a sixth solenoid valve is installed on the return pipe.

[0014] Preferably, the reflux pipe is connected to the reflux plate pipe, the reflux plate is arranged corresponding to the flotation hole, a feed pipe is installed on one side of the filter cartridge, the feed pipe is arranged in cooperation with the first discharge trough, and a hydraulic station is installed on the upper side of the support plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the present invention is used, the crushed battery fragments and the cleaning liquid can be put into the stirring cylinder through the feed hopper, and then the first rotating shaft is controlled to rotate by the fourth driving motor. The first rotating shaft rotates to mix the battery fragments and the cleaning liquid evenly, so that the metal substances in the battery fragments are precipitated, and the plastic and rubber materials float on the upper surface of the cleaning liquid. At this time, the second solenoid valve is controlled to open, so that the cleaning liquid with plastic and rubber materials floating on the surface flows into the flotation box, and then the flocculant liquid is flushed into it through the liquid inlet pipe. At this time, the metal particles in the suspended state in the cleaning liquid flowing into the plastic and rubber materials are precipitated. When the precipitation is completed, the second spiral plate is driven to rotate by the second driving motor to squeeze the floating plastic and rubber materials in the flotation box out of the third discharge pipe, and then the third solenoid valve is opened. The electromagnetic valve allows the cleaning liquid containing flocs to flow into the filter cylinder, and the hydraulic cylinder is controlled to extend, so that the cleaning liquid flows out from the reflux pipe, and the remaining gel-like material flows into the first discharge trough through the feed pipe. The first drive motor controls the first screw rod to rotate to discharge the metal scraps and gel-like metal materials settled at the bottom of the stirring cylinder through the first discharge pipe, and the cleaning liquid discharged into the reflux pipe flows into the reflux plate, and the liquid surface in the stirring cylinder is flushed by the cleaning liquid, so that the plastic and rubber materials floating on the cleaning liquid in the stirring cylinder can flow into the flotation box for flotation operation better, thereby greatly reducing the use of cleaning liquid, and can also effectively differentiate the effect of metal materials and other materials, so that the purity of the obtained metal materials and other materials is reduced, and the difficulty of recycling and reuse is reduced.

[0017] 2. When cleaning is needed, the present invention connects the magnetic plate to energize it and generate a magnetic field, and then controls the first rotating shaft to rotate through the fourth drive motor. When the first stirring rod rotates, the cleaning scraper is attracted by the magnetic plate and slides relative to the inner wall of the stirring cylinder, thereby completing the cleaning of the inner wall of the stirring cylinder. The magnetic plates arranged at intervals can indirectly attract the cleaning scraper, thereby more effectively completing the cleaning operation of the inner wall of the stirring cylinder.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a basic structural schematic diagram of the self-cleaning flotation device of the present invention.

[0020] Figure 2 The self-cleaning flotation device of the present invention Figure 1 Another perspective of the picture.

[0021] Figure 3 The self-cleaning flotation device of the present invention Figure 1 main view.

[0022] Figure 4 It is a cross-sectional view of the filter cartridge of the self-cleaning flotation device of the present invention.

[0023] Figure 5 It is a schematic diagram of the internal structure of the stirring drum of the self-cleaning flotation device of the present invention.

[0024] Figure 6 The figure is a schematic diagram of the installation position of the cleaning scraper of the self-cleaning flotation device of the present invention.

[0025] Figure 7 It is a schematic diagram of the internal structure of the flotation box of the self-cleaning flotation device of the present invention.

[0026] Figure 8 It is a schematic diagram of the installation positions of the second limit plate and the first limit plate of the self-cleaning flotation device of the present invention.

[0027] In the figure: 101, support plate; 102, bottom plate; 103, first discharge rod; 104, first discharge pipe; 105, first solenoid valve; 106, first drive motor; 107, stirring cylinder; 108, first discharge trough; 109, first spiral rod; 110, mounting bracket; 111, first rotating shaft; 112, first stirring rod; 113, cleaning plate; 114, movable trough; 115, cleaning scraper; 117, magnetic plate; 118, flotation hole; 119, protective shell; 120, fixing hoop; 121, feed hopper; 122, fourth drive motor; 123, reflux plate; 124, reflux pipe; 125, flotation box; 126, second solenoid valve; 127, second discharge pipe; 1 28. The third solenoid valve; 129. The second rotating shaft; 130. The second stirring rod; 131. The emergency drain pipe; 132. The second discharging rod; 133. The second driving motor; 134. The third discharging pipe; 135. The fourth solenoid valve; 136. The floating plate; 137. The liquid inlet pipe; 138. The liquid outlet hole; 139. The first limit plate; 140. The second spiral rod; 141. The second limit plate; 142. The third driving motor; 143. The hydraulic cylinder; 144. The filter cartridge; 145. The supporting bracket; 146. The hydraulic station; 147. The compression piston; 148. The filter plate; 149. The baffle; 150. The air inlet pipe; 151. The fifth solenoid valve; 153. The sixth solenoid valve; 154. The feed pipe. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] like Figure 1-Figure 8 As shown, the self-cleaning flotation device provided by the present invention comprises a support plate 101, a bottom plate 102 is mounted on the support plate 101, a stirring drum 107 is mounted on the bottom plate 102, a mounting bracket 110 is fixedly mounted in the stirring drum 107, a first rotating shaft 111 is mounted between the mounting bracket 110 and the stirring drum 107, a plurality of first stirring rods 112 are sleeved and fixedly mounted on the first rotating shaft 111, a cleaning plate 113 is mounted on one end of the first stirring rod 112, and a movable groove 113 is provided on one side of the cleaning plate 113 14. A cleaning scraper 115 is slidably installed in the movable groove 114. A plurality of protective shells 119 are installed on the outer side of the stirring cylinder 107. A magnetic plate 117 is installed in the protective shell 119. The protective shell 119 is fixed by a fixing hoop 120. The stirring cylinder 107 is made of plastic. The cleaning scraper 115 is magnetically matched with the magnetic plate 117. A feeding hopper 121 is installed on the stirring cylinder 107. A fourth drive motor 122 is installed on the stirring cylinder 107. The fourth drive motor 122 is driven and connected to the first rotating shaft 111.

[0030] In this embodiment, when cleaning is needed, the present invention connects the magnetic attraction plate 117 to energize it and generate a magnetic field, and then controls the first rotating shaft 111 to rotate through the fourth drive motor 122. When the first stirring rod 112 rotates, the cleaning scraper 115 is attracted by the magnetic attraction plate 117 and slides relative to the inner wall of the stirring cylinder 107, thereby completing the cleaning of the inner wall of the stirring cylinder 107. The magnetic attraction plates 117 arranged at intervals can indirectly attract the cleaning scraper 115 by magnetic attraction, thereby more effectively completing the cleaning operation of the inner wall of the stirring cylinder 107.

[0031] A first discharging rod 103 is installed on one side of the bottom plate 102, a first discharging trough 108 is opened in the bottom plate 102, the first discharging trough 108 extends into the first discharging rod 103, a first spiral rod 109 is installed in the first discharging trough 108, a return plate 123 is installed in the stirring cylinder 107, a first driving motor 106 is installed at one end of the first discharging rod 103, the first driving motor 106 is connected to the first spiral rod 109 through corresponding belts and pulleys, a first discharging pipe 104 is installed on the lower side of the first discharging rod 103, and a first solenoid valve 105 is installed on the first discharging pipe 104.

[0032] In this embodiment, the reflux plate 123 is arranged opposite to the flotation hole 118. The conduit plate is an arc plate and has a plurality of reflux holes on the inner side. When in use, the reflux liquid flowing out of the reflux hole can more effectively flow the plastic and rubber materials floating on the liquid surface of the stirring cylinder 107 into the flotation box 125, thereby improving the separation effect of the floating material and the metal precipitation material.

[0033] A flotation hole 118 is provided on the stirring cylinder 107, a flotation box 125 is installed on one side of the stirring cylinder 107, a second solenoid valve 126 is installed on one side of the flotation box 125, the stirring cylinder 107 is connected to the inside of the flotation box 125 through the flotation hole 118, a liquid inlet pipe 137 is installed on the flotation box 125, the liquid inlet pipe 137 extends into the flotation box 125, a floating plate 136 is installed at one end of the liquid inlet pipe 137 located inside the flotation box 125, a plurality of liquid outlet holes 138 are provided on the floating plate 136, a first limit plate 139 is installed on the lower side of the floating plate 136, and two second limit plates 141 arranged opposite to each other are installed in the flotation box 125.

[0034] It should be noted that the liquid entering the liquid inlet pipe 137 is a flocculant, which can effectively help the metal particles suspended in the cleaning liquid to become a gel, and then can effectively help the small metal particles to be recovered, thereby improving the metal recovery efficiency in this application.

[0035] The second limiting plate 141 is an arc plate, so that a trumpet-shaped cross-section is formed between the two second limiting plates 141. The first limiting plate 139 is located between the two second limiting plates 141. A second rotating shaft 129 is installed in the flotation box 125, and a plurality of second stirring rods 130 are installed on the second rotating shaft 129. A third driving motor 142 is installed on one side of the flotation box 125, and the third driving motor 142 is driven and connected to the second rotating shaft 129.

[0036] A second discharge rod 132 is installed at one end of the flotation box 125, a second spiral rod 140 is installed in the flotation box 125, the second spiral rod 140 is located between the first limit plate 139 and the two second limit plates 141, the second spiral rod 140 extends into the second discharge rod 132, a third discharge pipe 134 is installed outside the second discharge rod 132, a fourth solenoid valve 135 is installed on the third discharge pipe 134, and a second drive valve 136 is installed at one end of the second discharge rod 132. The second driving motor 133 drives the second screw rod 140, an emergency discharge pipe 131 is installed on one side of the flotation box 125, a second discharge pipe 127 is installed on the lower side of the flotation box 125, a third solenoid valve 128 is installed on the second discharge pipe 127, a support bracket 145 is installed on the support plate 101, a filter cartridge 144 is installed on the support bracket 145, and the filter cartridge 144 cooperates with the flotation box 125 through the second discharge pipe 127.

[0037] A hydraulic cylinder 143 is installed on one side of the filter cartridge 144, and the piston of the hydraulic cylinder 143 is movably installed on the compression piston 147. A filter plate 148 is fixedly installed in the filter cartridge 144, and the second discharge pipe 127 is located between the compression piston 147 and the filter plate 148. An air inlet pipe 150 is installed on one side of the filter cartridge 144, and a fifth solenoid valve 151 is installed on the air inlet pipe 150. A baffle 149 is installed in the filter cartridge 144, and the baffle 149 is aligned with the air inlet pipe 150. It should be arranged in coordination, a return pipe 124 is also installed on one side of the filter cartridge 144, a sixth solenoid valve 153 is installed on the return pipe 124, a return plate 123 is installed in the stirring cartridge 107, the return pipe 124 is connected to the return plate 123, the return plate 123 is arranged corresponding to the flotation hole 118, a feed pipe 154 is installed on one side of the filter cartridge 144, the feed pipe 154 is arranged in coordination with the first discharge trough 108, and a hydraulic station 146 is installed on the upper side of the support plate 101.

[0038] In this embodiment, a pump body for driving the flocculent material in the feed pipe 154 is provided in the hydraulic station 146. The hydraulic station 146 is used to control the hydraulic cylinder 143 and other pipelines that require liquid pumping. No further explanation is given here. In this embodiment, the filter plate 148 can be a soft filter membrane plate. When in use, air can be blown into the filter cylinder 144 through the air inlet pipe 150 to deform the filter plate 148, thereby accelerating the falling off of the filter cake formed on one side of the filter plate 148.

[0039] Working principle: When the present invention is used, the crushed battery fragments and the cleaning liquid can be put into the stirring drum 107 through the feed hopper 121. During this process, the liquid level line in the stirring drum 107 should be guaranteed (the liquid level line should be set 50mm higher than the flotation hole), and then the fourth drive motor 122 is used to control the first rotating shaft 111 to rotate. The first rotating shaft 111 rotates to mix the battery fragments and the cleaning liquid evenly, so that the metal substances in the battery fragments are precipitated, and the plastic and rubber materials float on the upper surface of the cleaning liquid. At this time, the second solenoid valve 126 is controlled to open, so that the cleaning liquid with plastic and rubber materials floating on the surface flows into the flotation box 125, and then the flocculant liquid is flushed into it through the liquid inlet pipe 137. At this time, the suspended metal particles in the cleaning liquid flowing into the plastic and rubber materials are precipitated. When the precipitation is completed, the second spiral plate is driven to rotate by the second drive motor 133 to squeeze the floating plastic and rubber materials in the flotation box 125 out of the third discharge pipe 134. At this time, the third solenoid valve 128 is opened again, so that the cleaning liquid containing flocs flows into the filter cylinder 144, and the hydraulic cylinder 143 is controlled to extend, so that the cleaning liquid flows out from the reflux pipe 124, and the remaining gel material flows into the first discharge trough 108 through the feed pipe 154, and then the first drive motor 106 controls the first screw rod 109 to rotate to discharge the metal scraps and gel metal materials settled at the bottom of the stirring cylinder 107 through the first discharge pipe 104, and the cleaning liquid discharged into the reflux pipe 124 flows into the reflux plate 123, and the cleaning liquid is used to flush the liquid surface in the stirring cylinder 107, so that the plastic and rubber materials floating on the cleaning liquid in the stirring cylinder 107 can flow into the flotation box 125 for flotation operation, thereby greatly reducing the use of cleaning liquid, and can also effectively differentiate the effect of metal materials and other materials, so that the purity of the obtained metal materials and other materials is reduced, the difficulty of recycling and reuse is reduced, and the recycling rate of various materials of waste batteries is effectively improved.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Self-cleaning flotation device, characterized by: The invention comprises a support plate (101), a bottom plate (102) is mounted on the support plate (101), a stirring cylinder (107) is mounted on the bottom plate (102), a mounting bracket (110) is fixedly mounted in the stirring cylinder (107), a first rotating shaft (111) is mounted between the mounting bracket (110) and the stirring cylinder (107), a plurality of first stirring rods (112) are sleeved and fixedly mounted on the first rotating shaft (111), a cleaning plate (113) is mounted on one end of the first stirring rod (112), a movable groove (114) is provided on one side of the cleaning plate (113), and the movable groove (114) is arranged on the inner side of the stirring cylinder (107). ) is slidably mounted with a cleaning scraper (115), a plurality of protective shells (119) are mounted on the outer side of the stirring cylinder (107), a magnetic plate (117) is mounted inside the protective shell (119), the protective shell (119) is fixed by a fixing hoop (120), the stirring cylinder (107) is made of plastic, the cleaning scraper (115) is magnetically mounted with the magnetic plate (117), a feeding hopper (121) is mounted on the stirring cylinder (107), a fourth driving motor (122) is mounted on the stirring cylinder (107), and the fourth driving motor (122) is drivingly connected to the first rotating shaft (111).

2. The self-cleaning flotation device according to claim 1, characterized in that: A first discharge rod (103) is installed on one side of the bottom plate (102), a first discharge trough (108) is provided in the bottom plate (102), the first discharge trough (108) extends into the first discharge rod (103), a first spiral rod (109) is installed in the first discharge trough (108), and a return plate (123) is installed in the stirring cylinder (107).

3. The self-cleaning flotation device according to claim 2, characterized in that: A first driving motor (106) is installed at one end of the first discharging rod (103), and the first driving motor (106) is connected to the first spiral rod (109) through a corresponding belt and pulley drive. A first discharging pipe (104) is installed at the lower side of the first discharging rod (103), and a first solenoid valve (105) is installed on the first discharging pipe (104).

4. The self-cleaning flotation device according to claim 1, characterized in that: The stirring cylinder (107) is provided with a flotation hole (118), a flotation box (125) is installed on one side of the stirring cylinder (107), a second solenoid valve (126) is installed on one side of the flotation box (125), the stirring cylinder (107) is connected with the inside of the flotation box (125) through the flotation hole (118), a liquid inlet pipe (137) is installed on the flotation box (125), the liquid inlet pipe (137) extends into the flotation box (125), a floating plate (136) is installed at one end of the liquid inlet pipe (137) located inside the flotation box (125), a plurality of liquid outlet holes (138) are provided on the floating plate (136), a first limit plate (139) is installed on the lower side of the floating plate (136), and two second limit plates (141) arranged opposite to each other are installed in the flotation box (125).

5. The self-cleaning flotation device according to claim 4, characterized in that: The second limiting plate (141) is an arc plate, so that a bell-shaped cross section is formed between the two second limiting plates (141); the first limiting plate (139) is located between the two second limiting plates (141); a second rotating shaft (129) is mounted in the flotation box (125); a plurality of second stirring rods (130) are mounted on the second rotating shaft (129); a third driving motor (142) is mounted on one side of the flotation box (125); and the third driving motor (142) is connected to the second rotating shaft (129) for driving.

6. The self-cleaning flotation device according to claim 5, characterized in that: A second discharge rod (132) is installed at one end of the flotation box (125), a second screw rod (140) is installed inside the flotation box (125), the second screw rod (140) is located between the first limit plate (139) and the two second limit plates (141), the second screw rod (140) extends into the second discharge rod (132), a third discharge pipe (134) is installed on the outer side of the second discharge rod (132), a fourth solenoid valve (135) is installed on the third discharge pipe (134), a second drive motor (133) is installed at one end of the second discharge rod (132), and the second drive motor (133) drives the second screw rod (140).

7. The self-cleaning flotation device according to claim 6, characterized in that: An emergency discharge pipe (131) is installed on one side of the flotation box (125); a second discharge pipe (127) is installed on the lower side of the flotation box (125); a third solenoid valve (128) is installed on the second discharge pipe (127); a support bracket (145) is installed on the support plate (101); a filter cartridge (144) is installed on the support bracket (145); and the filter cartridge (144) is connected to the flotation box (125) via the second discharge pipe (127).

8. The self-cleaning flotation device according to claim 7, characterized in that: A hydraulic cylinder (143) is mounted on one side of the filter cylinder (144); the piston of the hydraulic cylinder (143) is movably mounted on a compression piston (147); a filter plate (148) is fixedly mounted inside the filter cylinder (144); and the second discharge pipe (127) is located between the compression piston (147) and the filter plate (148).

9. The self-cleaning flotation device according to claim 8, characterized in that: An air intake pipe (150) is installed on one side of the filter cartridge (144), and a fifth solenoid valve (151) is installed on the air intake pipe (150). A baffle (149) is installed inside the filter cartridge (144), and the baffle (149) is arranged corresponding to the air intake pipe (150). A return pipe (124) is also installed on one side of the filter cartridge (144), and a sixth solenoid valve (153) is installed on the return pipe (124).

10. The self-cleaning flotation device according to claim 9, characterized in that: The reflux pipe (124) is connected to the reflux plate (123), the reflux plate (123) is arranged corresponding to the flotation hole (118), a feed pipe (154) is installed on one side of the filter cartridge (144), the feed pipe (154) is installed in cooperation with the first discharge trough (108), and a hydraulic station (146) is installed on the upper side of the support plate (101).

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