Impurity removal equipment for wet recovery of waste lithium batteries

Abstract

The invention belongs to the technical field of waste lithium battery recovery equipment, and particularly relates to impurity removal equipment for wet recovery of waste lithium batteries. The device comprises a gas inlet pipe and a gas outlet pipe, a reaction kettle for solution reaction is used, the bottom of the reaction kettle is in sealed connection with a first supporting seat through a bolt, the top end of the reaction kettle is fixedly sleeved with an impurity removal cover, and the top of the impurity removal cover is in sealed connection with a first sealing cover. Then, reducing gas rushes upwards from the bottom of the reaction kettle and is discharged from the exhaust holes in the stirring plate, on one hand, the stirring plate can rotate circumferentially under the thrust of the gas to the solution, the effect of stirring the solution and bottom sediments is achieved, and on the other hand, discharged bubbles rise uniformly along with the circumferential rotation of the stirring plate; the reaction uniformity of the reducing gas and the solution can be improved, and the contact area of the bubbles for driving the light impurities to rise can be increased.

Description

Technical Field

[0001] This invention belongs to the technical field of a waste lithium battery wet recycling impurity removal equipment, specifically a waste lithium battery wet recycling impurity removal equipment. Background Technology

[0002] In the recycling and processing of waste batteries, automated leaching and primary impurity removal devices are the core equipment in the wet impurity removal process of waste batteries. Because they can integrate leaching and impurity removal functions and improve operating efficiency, they have become one of the mainstream equipment in the industry.

[0003] The impurity removal equipment required for the goethite iron removal process integrates ore leaching and preliminary impurity removal. By automating, the efficiency is improved. During the impurity removal process, the waste batteries need to be pre-treated by discharging, dismantling, crushing and sorting. The resulting positive and negative electrode material powders rich in valuable metals such as lithium, cobalt, nickel and manganese are mixed with corresponding chemical solutions to carry out chemical reactions. Then, the ore reactants are soaked in the solution and a reducing gas is introduced to use the redox reaction to achieve the effect of separating and purifying valuable metal ions in the waste batteries.

[0004] In traditional wet recycling equipment for waste lithium batteries, the reducing gas is typically introduced from a fixed position during the impurity removal process. This results in uneven gas distribution in the solution, leading to a small contact area between the gas and the reactants in the solution, as well as the reactants precipitated at the bottom. Consequently, the overall redox reaction efficiency is reduced, ultimately causing the impurity removal equipment to have low efficiency. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a purification device for wet recycling of waste lithium batteries. This invention primarily addresses the problem that traditional purification devices for wet recycling of waste lithium batteries typically introduce reducing gas at a fixed location during the purification process. This results in uneven gas distribution in the solution, leading to a small contact area between the gas and reactants in the solution, as well as reactants precipitated at the bottom. Consequently, the overall redox reaction efficiency is reduced, ultimately resulting in low purification efficiency of the equipment.

[0006] The technical solution adopted by this invention to solve its technical problem is: a purification device for wet recycling of waste lithium batteries, comprising: The reactor is used for solution reaction. The bottom of the reactor is sealed with a first support base by bolts. The top of the reactor is fitted with a purification cover, and the top of the purification cover is sealed with a first sealing cover. The first sealing cover has a through groove at its center, and a leaching cage containing ore reactants is slidably connected in the through groove. The top of the leaching cage is threaded with a second sealing cover, and the lower half of the outer wall has multiple evenly distributed through holes. An air inlet pipe is fixedly inserted through the center of the first support base, and the bottom end of the air inlet pipe is connected to a first connecting pipe for conveying reducing gas. A stirring mechanism for stirring the sediment at the bottom of the reactor is provided at the top end of the air inlet pipe. The stirring mechanism includes a rotating block rotatably connected to the top end of the air inlet pipe. The upper and lower ends of the rotating block are respectively provided with mounting grooves and air inlet chambers. Multiple air jet holes are provided on the arc-shaped wall of the end of the air inlet pipe located in the air inlet chamber. Three evenly distributed second connecting pipes are fixedly inserted through the side wall of the air inlet chamber, and a stirring plate is connected to the end of each second connecting pipe away from the air inlet chamber. A cavity is provided in the stirring plate, and the cavity is connected to the air inlet chamber through the second connecting pipe. The stirring plate is inclined, and multiple exhaust holes connected to the internal cavity are provided on the higher side.

[0007] Furthermore, the end of the stirring plate is teardrop-shaped, with the side with a larger curvature being the higher side, and the multiple air jet holes on the stirring plate are evenly distributed.

[0008] Furthermore, a transmission gear is sleeved and fixed on the tube body between the stirring plate and the rotating block of the second connecting pipe. A right-angle ring is rotatably connected to the top of the rotating block. The bottom of the right-angle ring has an annular tooth groove that meshes with the top of the three transmission gears. A limiting groove is opened at the center of the transmission gear, and a rotating block is slidably connected in the limiting groove. The top of the rotating block is provided with three gripping grooves for easy pinching. A semi-circular tooth groove is opened on the arc-shaped side wall of the rotating block. A semi-circular tooth is opened on the inner wall of the limiting groove of the right-angle ring, which is adapted to the semi-circular tooth groove and meshes with the semi-circular tooth groove. A locking block is attached to the bottom of the rotating block, and one end of the locking block is locked in the tooth groove of the semi-circular tooth. A limiting shaft is fixedly connected to the bottom of the locking block. A limiting sleeve is inserted into the bottom of the limiting shaft and is slidably connected to the limiting sleeve. A spring is fixedly connected to the bottom of the limiting shaft and the bottom of the limiting sleeve. The height of the semi-circular tooth groove is less than the height of the limiting groove and greater than the thickness of the locking block.

[0009] Furthermore, the bottom of the impurity removal hood is fitted with an annular filter that matches its contour. The filter consists of an annular support box and multiple annular wavy filter layers. The top of the annular support box has a U-shaped groove that matches its contour, and the multiple annular wavy filter layers are evenly installed in the U-shaped groove. The bottom of the U-shaped groove and the bottom of the filter are connected by a fourth connecting pipe. A water pump is fixedly installed at the bottom of the first support base. The water inlet of the water pump is connected to the bottom of the fourth connecting pipe. A water outlet plate is fixedly connected to the bottom of the inner wall of the reactor, and the water outlet plate is connected to the air inlet pipe. The water outlet plate has a circular cavity that matches its contour. The top of the circular cavity has multiple evenly distributed water outlet holes, and the drain holes are connected to the circular cavity inside the reactor. The water outlet of the water pump is connected to a third connecting pipe. The top of the third connecting pipe passes through and is fixed to the first support base and the water outlet plate in sequence, and is connected to the circular cavity inside the water outlet plate.

[0010] Furthermore, a support plate is provided directly above the leaching cage, and a bearing is provided between the leaching cage and the support plate. The top of the outer ring of the bearing is fixedly connected to the lower surface of the support plate, and the bottom of the inner ring of the bearing is fixedly connected to the upper surface of the leaching cage. A top plate is provided directly above the support plate, and a first electric actuator is fixedly connected to the center of the top of the top plate. The output shaft of the first electric actuator passes through the top plate and is connected to the support plate. Three evenly distributed connecting rods are fixedly connected to the lower surface of the top plate, and the bottom ends of the three connecting rods pass through the support plate and are fixedly connected to the top of the first sealing cover.

[0011] Furthermore, the leaching cage has two evenly distributed threaded grooves, and the top of the first sealing cover is fixedly connected to two guide seats that are slidably connected to the outer wall of the leaching cage. The guide seats are fixedly connected to a limiting block that is adapted to the threaded groove on the side opposite to the leaching cage, and the limiting block is slidably connected in the threaded groove.

[0012] Furthermore, a tension detector electrically connected to an external controller is fixedly connected to the bottom end of the first electric actuator output shaft, and the bottom of the tension detector is fixedly connected to the upper surface of the support plate.

[0013] Furthermore, multiple evenly distributed stirring blocks are fixedly connected to the arc-shaped sidewall near the bottom of the immersion cage.

[0014] Furthermore, a liquid level sensor is fixedly installed on the inner wall of the reactor near the top, and the liquid level sensor is electrically connected to an external controller.

[0015] Furthermore, a connecting plate is fixedly connected to the top of the top plate. Two support columns are connected through the end of the connecting plate away from the top plate and are slidably connected to the support columns. A baffle and a large gear are fixedly connected to the upper and lower ends of the two support columns, respectively. A second support seat is rotatably connected to the bottom of the large gear and a small gear is meshed with its side wall. A positioning shaft is fixedly connected to the center of the second support seat and the top of the positioning shaft passes through the large gear and is rotatably connected to it. A mounting seat is fixedly connected to the top of the positioning shaft and a second electric push rod is fixedly connected to the top of the mounting seat. The top of the output shaft of the second electric push rod is fixedly connected to the lower surface of the connecting plate and is located on the same vertical line as the end of the positioning shaft. A mounting plate is fixedly connected to the arc-shaped side wall of the second support seat and a motor is fixedly connected to the bottom of the mounting plate. The end of the output shaft of the motor passes through the mounting plate and is fixedly connected to the center of the small gear. Multiple gripping rods for easy gripping are fixedly connected to the arc-shaped side wall of the second sealing cover.

[0016] The beneficial effects of this invention are as follows: 1. In this invention, reducing gas from an external gas supply device is introduced into the inlet pipe through a first connecting pipe. Subsequently, the reducing gas is injected upward from the bottom of the reactor. This not only rolls up the sediment at the bottom of the reactor to the middle of the solution, but also stirs the solution, allowing the sediment at the bottom of the reactor to react fully with the stirred solution again. At the same time, the injected reducing gas can also accelerate the redox reaction between the ore reactants and the solution, thereby accelerating the redox rate of valuable metal ions in the solution and improving the separation and purification efficiency. The reducing gas discharged from the exhaust port, on the one hand, uses the thrust of the gas on the solution to make the stirring plate rotate in a circular motion, achieving the effect of stirring the solution and the sediment at the bottom. On the other hand, the discharged bubbles rise uniformly with the circular rotation of the stirring plate, which not only improves the uniformity of the reaction between the reducing gas and the solution, but also increases the contact area for the bubbles to carry light impurities upward.

[0017] 2. In this invention, by pressing down on the rotating block, it continuously pushes the locking block out from between the semi-circular teeth during the descent, and pushes down the limiting shaft to compress the spring, thus releasing the limiting effect on the semi-circular teeth and allowing the right-angle ring to rotate freely. At this time, rotating the rotating block again, using the relationship that the semi-circular groove on the rotating block is still engaged with the semi-circular teeth on the right-angle ring, drives the right-angle ring to rotate. As the right-angle ring rotates, the three transmission gears connected to the annular groove at the bottom of the right-angle ring will also drive the second connecting pipe to rotate around the second connecting pipe as the center, thereby driving the stirring plate to rotate. This adjusts the tilt angle of the stirring plate, thereby changing the contact area between the reducing gas and the reactants and the amount of reactants scooped up by the stirring plate 33, thus freely adjusting the reaction rate. At the same time, adjusting the tilt angle of the stirring plate can also change the angle at which the reducing gas is ejected from the exhaust hole, thereby changing the rising speed of the bubbles and the amount that comes into contact with the sediment and carries it up, thus improving the separation and purification speed of valuable metal ions in waste batteries.

[0018] 3. In this invention, during the process of vertically raising and lowering the output shaft of the first electric push rod and intermittently lowering the leaching cage, each descent of the leaching cage passes through the guide seat and slides on its surface. During this process, the limiting block fixedly connected to the guide seat will rotate at a certain angle due to the sliding connection with the threaded groove. The rotating leaching cage will be more conducive to the solution entering the leaching cage and reacting more fully with the ore reactants, and the reactants will be thrown out, thereby further improving the reaction efficiency between the solution and the ore reactants.

[0019] 4. By installing a tension detector between the bottom of the first electric actuator output shaft and the support plate, when the first electric actuator output shaft pulls the support plate upward, the tension detector will detect the tension required to pull the support plate and the leaching cage upward. By comparing the tension data of the initial full load of ore reactants recorded in advance by the external controller, it can be known how much the ore reactants in the leaching cage have decreased. This allows technicians to replenish the ore reactants in a timely manner when they are consumed to the point where they need to be replenished, ensuring that the reaction efficiency between the solution and the ore reactants can be maintained continuously at a high level. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the reaction vessel, the impurity removal hood, and the leaching cage in this invention; Figure 3 This is the present invention. Figure 2 Enlarged structural diagram of area A in the middle; Figure 4 This is a partial structural diagram of the top of the first support base in this invention; Figure 5 This is a cross-sectional view of the rotating block, the second connecting pipe, and the stirring plate in this invention. Figure 6 This is a schematic diagram of the structure of the second connecting pipe, transmission gear, and right-angle ring in this invention; Figure 7 This is a schematic diagram of the structure of the bottom of the impurity removal hood and the reaction vessel after cross-section in this invention; Figure 8 This is a schematic diagram of the structure at the bottom of the first support base in this invention; Figure 9 This is a cross-sectional view of the first support base and the water outlet plate in this invention. Figure 10 This is a schematic diagram of the structure of the guide seat and the limiting block in this invention; Figure 11 This is a cross-sectional view of the limiting plate and the limiting shaft in this invention.

[0022] In the diagram: 1. Reactor; 10. Inlet pipe; 101. First connecting pipe; 11. Liquid level sensor; 12. First support base; 13. Impurity removal hood; 131. Filter; 14. First sealing cover; 141. Guide seat; 142. Limiting block; 15. Immersion cage; 151. Second sealing cover; 152. Threaded groove; 153. Stirring block; 16. Support plate; 161. Bearing; 17. Top plate; 18. First electric actuator; 181. Tension detector; 19. Connecting rod; 2. Second support base; 21. Mounting plate; 22. Motor; 23. Small gear; 24. Large gear; 25. Positioning shaft; 251. Mounting base; 26. Second electric actuator; 27. Support column; 28. Connecting plate; 29. ​​Baffle; 3. Stirring mechanism; 31. Rotating block; 311. Air inlet chamber; 312. Mounting groove; 32. Second connecting pipe; 33. Stirring plate; 34. Transmission gear; 35. Right angle ring; 36. Rotating block; 37. Locking block; 38. Limiting shaft; 39. Limiting sleeve; 391. Spring; 4. Water pump; 41. Third connecting pipe; 42. Fourth connecting pipe; 43. Water outlet plate. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example 1

[0024] like Figures 1-6 As shown, a waste lithium battery wet recycling equipment includes: The reactor 1 used for solution reaction has a first support base 12 connected to the bottom of the reactor 1 by bolts, a purification cover 13 is fixed to the top of the reactor 1, and a first sealing cover 14 is connected to the top of the purification cover 13. A through groove is opened in the center of the first sealing cover 14, and a leaching cage 15 loaded with ore reactants is slidably connected in the through groove. A second sealing cover 151 is threaded to the top of the leaching cage 15, and multiple evenly distributed through holes are opened on the lower half of the outer wall. A first support base 12 is centrally fixed with an air inlet pipe 10, and the bottom end of the air inlet pipe 10 is connected to a first connecting pipe 101 for conveying reducing gas. The top end of the air inlet pipe 10 is equipped with a stirring mechanism 3 for stirring the sediment at the bottom of the reactor 1. The stirring mechanism 3 includes a rotating block 31 rotatably connected to the top end of the air inlet pipe 10. The rotating block 31 has mounting grooves 312 and an air inlet chamber 311 at its upper and lower ends, respectively. Multiple jet holes are formed on the arc-shaped wall of the end of the air inlet pipe 10 located within the air inlet chamber 311. Three evenly distributed second connecting pipes 32 are fixedly fixed through the side wall of the air inlet chamber 311, and each second connecting pipe 32, away from the air inlet chamber 311, is connected to a stirring plate 33. A cavity is formed within the stirring plate 33, and the cavity is connected to the second connecting pipes 32. Connected to the air inlet chamber 311, the stirring plate 33 is inclined, and multiple exhaust holes connected to the internal cavity are opened on the higher side. In the wet recycling process of waste lithium batteries, battery powder is generally mixed with a solution of corresponding proportion. After the battery powder reacts fully, the valuable metals in it dissolve into the solution in the form of ions. Finally, the solution is separated and purified by chemical methods to achieve the purpose of removing impurities. In the separation and purification process, the solution containing valuable metal ions from waste batteries is first poured into the reaction vessel 1. Then, the ore reactants of the corresponding solution proportion are loaded into the leaching cage 15, and the leaching cage 15 is lowered into the solution in the reaction vessel 1 through the through groove on the first sealing cover 14, so that the ore reactants and the solution can react chemically. During this process, it is only necessary to control the sinking amount of the leaching cage 15 according to the requirements, so that the reaction solution can completely submerge the ore reactants and ensure that the ore reactants and the reaction solution can react fully. Then, a corresponding reducing gas, such as air or oxygen, needs to be introduced into the reaction vessel 1. The reducing gas from the external gas supply equipment is introduced into the gas inlet pipe 10 through the first connecting pipe 101. Then, the reducing gas rushes upward from the bottom of the reaction vessel 1, which not only rolls the sediment at the bottom of the reaction vessel 1 to the middle of the solution, but also stirs the solution, so that the sediment at the bottom of the reaction vessel 1 can react fully with the stirred solution again. At the same time, the introduced reducing gas can also accelerate the redox reaction between the ore reactants and the solution, thereby accelerating the redox reaction of valuable metal ions in the solution. To improve the separation and purification efficiency, during the introduction of reducing gas, the reducing gas first enters the intake chamber 311 through multiple jet holes on the intake pipe 10. Since the two ends of the second connecting pipe 32 are connected to the intake chamber 311 and the cavity of the stirring plate 33 respectively, the air in the intake chamber 311 enters the stirring plate 33 through the second connecting pipe 32, and finally exits through the exhaust holes on the stirring plate 33. The reducing gas exiting from the exhaust holes, on the one hand, utilizes the thrust of the gas on the solution to cause the stirring plate 33 to rotate circumferentially, achieving the effect of stirring the solution and bottom sediment; on the other hand, the exited bubbles rise uniformly following the circumferential rotation of the stirring plate 33, which not only improves the uniformity of the reaction between the reducing gas and the solution, but also...It can also increase the contact area for bubbles to carry light impurities upward; The end of the stirring plate 33 is teardrop-shaped, with the side with a larger curvature being the higher side. Multiple air jet holes on the stirring plate 33 are evenly distributed. With the above configuration, when the stirring plate 33 rotates using the thrust generated by the reducing gas ejected through the multiple air jet holes, the bubbles discharged from the higher side of the stirring plate 33 can carry the scooped ore deposits upward, thereby increasing the contact area between the ore deposits and the solution, achieving the effect of enhancing the uniformity of the reaction process and improving the reaction efficiency. At the same time, the side with a narrower curvature will reduce the water flow resistance when the stirring plate 33 rotates, increase the rotation speed, and thus enhance the contact area between the rising bubbles and the ore reactants, further improving the uniformity of the reaction process between the deposits and the solution. Example 2

[0025] As a further improvement to Example 1, such as Figures 2-6As shown, a transmission gear 34 is sleeved and fixed on the pipe body of the second connecting pipe 32 located between the stirring plate 33 and the rotating block 31. A right-angle ring 35 is rotatably connected to the top of the rotating block 31. The bottom of the right-angle ring 35 has an annular toothed groove that meshes with the top of the three transmission gears 34. A limiting groove is opened at the center of the transmission gear 34, and a rotating block 36 is slidably connected in the limiting groove. The top of the rotating block 36 is provided with three gripping grooves for easy pinching. A semi-circular toothed groove is opened on the arc-shaped side wall of the rotating block 36. A semi-circular toothed tooth is opened on the inner wall of the limiting groove of the right-angle ring 35, which is adapted to the semi-circular toothed groove. The rotating block 36 is connected by a circular toothed meshing connection. A locking block 37 is attached to the bottom of the rotating block 36, with one end of the locking block 37 engaging within the toothed groove of the semi-circular teeth. A limiting shaft 38 is fixedly connected to the bottom of the locking block 37. A limiting sleeve 39 is inserted into the bottom of the limiting shaft 38 and is slidably connected to the limiting sleeve 39. A spring 391 is fixedly connected to both the bottom of the limiting shaft 38 and the bottom of the limiting sleeve 39. The height of the semi-circular toothed groove is less than the height of the limiting groove but greater than the thickness of the locking block 37. When adjusting the tilt angle of the stirring plate 33, simply pinch the gripper groove with your fingers and press the rotating block 36 downwards, causing it to continuously push the locking block 37 from the semi-circular toothed groove during its descent. The teeth disengage and push the limiting shaft 38 downwards to compress the spring 391, releasing the limiting effect on the semi-circular teeth and allowing the right-angle ring 35 to rotate freely. Then, rotating the rotating block 36, utilizing the still-engaging semi-circular groove on the rotating block 36 with the semi-circular teeth of the right-angle ring 35, drives the right-angle ring 35 to rotate. As the right-angle ring 35 rotates, the three transmission gears 34, meshing with the bottom annular groove of the right-angle ring 35, also rotate around the second connecting pipe 32, causing the second connecting pipe 32 to rotate, which in turn drives the stirring plate 33 to rotate, thereby adjusting the tilt of the stirring plate 33. The angle is adjusted to change the contact area between the reducing gas and the reactants, as well as the amount of reactants lifted by the stirring plate 33, thereby freely adjusting the reaction rate. During the rotation of the right-angle ring 35, the locking block 37 is always attached to the lower surface of the rotating block 36 by the thrust of the limiting shaft 38 under the elastic reset of the spring 391. When it is necessary to stop the rotation, the rotating block 36 is lifted up and rotated slowly. At this time, the locking block 37 will rise with the rotating block 36 and engage with the corresponding groove of the semi-circular teeth during the slow rotation of the rotating block 36, thus re-limiting the right-angle ring 35 and achieving the effect of conveniently adjusting the tilt angle of the stirring plate 33. Example 3

[0026] As a further supplement to Example 1, such as Figure 1 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the bottom of the impurity removal hood 13 is fitted with an annular filter 131 that matches its contour. The filter 131 consists of an annular support box and multiple annular wavy filter layers. The top of the annular support box has a U-shaped groove that matches its contour, and multiple annular wavy filter layers are evenly installed in the U-shaped groove. The bottom of the U-shaped groove and the bottom of the filter 131 are connected by a fourth connecting pipe 42. The bottom of the first support 12 is fixedly installed with a water pump 4. The water inlet of the water pump 4 is connected to the bottom of the fourth connecting pipe 42. The bottom of the inner wall of the reactor 1 is fixedly connected with a water outlet plate 43, and the water outlet plate 43 is connected to the air inlet pipe 10. The inside of the water outlet plate 43 has a circular cavity that matches its contour. The top of the circular cavity has multiple evenly distributed water outlet holes, and the drain holes are connected to the circular cavity inside the reactor 1. The water outlet of the water pump 4 is connected to a third connecting pipe 41. The top of the third connecting pipe 41 is sequentially fixed through the first support hood 42. The support 12 and the outlet plate 43 are connected to the circular cavity inside the outlet plate 43. When the leaching cage 15 sinks into the solution with the ore reactants, the solution level will rise and eventually overflow the top of the filter 131. The solution at the top of the filter 131 permeates downward through multiple annular wave-shaped filter layers, achieving the effect of filtering and collecting light impurities in the solution. The downward permeating solution reaches the inlet of the water pump 4 through the fourth connecting pipe 42. During this process, the water pump 4 is started, and the solution filtered by the filter 131 is discharged into the circular cavity of the outlet plate 43 through the third connecting pipe 41. Then, the filtered solution is refilled into the bottom of the reactor 1 using multiple evenly distributed outlet holes connected to the circular cavity. On the one hand, the circulating solution impacts the sediment at the bottom of the reactor 1, causing it to be carried back to the middle of the solution to continue participating in the rapid reaction, improving the uniformity and efficiency of the reaction.

[0027] A support plate 16 is positioned directly above the leaching cage 15, and a bearing 161 is positioned between the leaching cage 15 and the support plate 16. The top of the outer ring of the bearing 161 is fixedly connected to the lower surface of the support plate 16, and the bottom of the inner ring of the bearing 161 is fixedly connected to the upper surface of the leaching cage 15. A top plate 17 is positioned directly above the support plate 16, and a first electric actuator 18 is fixedly connected to the center of the top of the top plate 17. The output shaft of the first electric actuator 18 passes through the top plate 17 and is connected to the support plate 16. Three evenly distributed connecting rods 19 are fixedly connected to the lower surface of the top plate 17. The bottom ends of the three connecting rods 19 pass through the support plate 16 and are fixedly connected to the top of the first sealing cover 14. The vertical movement is controlled by adjusting the output shaft of the first electric actuator 18. The vertical lifting mechanism utilizes the output shaft of the first electric actuator 18 to drive the support plate 16 and the leaching cage 15 to move synchronously, allowing the leaching cage 15 to be lowered intermittently multiple times. This accelerates the entry of the solution into the leaching cage 15 through the bottom hole, increasing the reaction rate between the solution and the ore reactants in the leaching cage 15. Simultaneously, the lifting action of the output shaft of the first electric actuator 18 controls the intermittent lowering of the leaching cage 15, causing the solution in the reaction vessel 1 to overflow intermittently during the intermittent lowering of the leaching cage 15. This allows the solution to be filtered multiple times on the filter 131 and promotes the continuous circulation of the solution in the downward permeation filter 131 through the water pump 4, improving the reaction efficiency between the solution and the reactants. Two evenly distributed threaded grooves 152 are provided on the leaching cage 15. The top of the first sealing cover 14 is fixedly connected to two guide seats 141 that are slidably connected to the outer wall of the leaching cage 15. On the side of the guide seat 141 opposite to the leaching cage 15, a limiting block 142 adapted to the threaded groove 152 is fixedly connected, and the limiting block 142 is slidably connected in the threaded groove 152. When the output shaft of the first electric push rod 18 is vertically raised and lowered and the leaching cage 15 is intermittently lowered, each descent of the leaching cage 15 will pass through the guide seat 141 and slide on its surface. During this period, the limiting block 142 fixedly connected to the guide seat 141 will rotate at a certain angle due to the sliding connection with the threaded groove 152. The rotating leaching cage 15 will be more conducive to the solution entering the leaching cage 15 and reacting more fully with the ore reactants, and the reactants will be thrown out, thereby further improving the reaction efficiency between the solution and the ore reactants. The bottom end of the output shaft of the first electric push rod 18 is fixedly connected to a tension detector 181 electrically connected to an external controller, and the bottom of the tension detector 181 is fixedly connected to the upper surface of the support plate 16. By installing the tension detector 181 between the bottom end of the output shaft of the first electric push rod 18 and the support plate 16, when the output shaft of the first electric push rod 18 pulls the support plate 16 upward, the tension detector 181 will detect the tension required to pull the support plate 16 and the leaching cage 15 upward. By comparing the tension data of the initial full load of ore reactants recorded in advance by the external controller, it can be known how much the ore reactants in the leaching cage 15 have decreased. This allows technicians to replenish the ore reactants in a timely manner when they are consumed to the point where they need to be replenished, ensuring that the reaction efficiency between the solution and the ore reactants can be maintained continuously at a high level. Multiple uniformly distributed stirring blocks 153 are fixedly connected to the arc-shaped side wall near the bottom of the leaching cage 15. The multiple uniformly distributed stirring blocks 153 can increase the centrifugal force inside the leaching cage 15 when the leaching cage 15 rotates, accelerate the speed at which the solution and reactant residue are thrown out of the leaching cage 15, and increase the speed at which the solution enters the leaching cage 15. The solution that enters the leaching cage 15 at an accelerated rate will wash the surface of the ore reactants, thereby accelerating the falling off of reactant residues from the surface of the ore reactants and improving the reaction efficiency between the solution and the ore reactants.

[0028] A liquid level sensor 11 is fixedly installed on the inner wall of the reactor 1 near the top, and the liquid level sensor 11 is electrically connected to an external controller. The liquid level sensor 11 monitors the liquid level of the solution in the reactor 1 in real time and transmits the signal to the external controller. The external controller will remind the relevant technicians to replenish the solution when the liquid level drops to the point where it needs to be replenished, so as to avoid the problem of reduced reaction efficiency caused by the solution level dropping. At the same time, if the solution level is too low, the solution will not be able to overflow when the leaching cage 15 descends, which will prevent the solution from entering the reactor 1 through the water pump 4 to complete the continuous circulation. At this time, the sediment at the bottom of the reactor 1 can no longer be flushed up by the circulating water flow. The continuous accumulation of sediment will also cause the concentration of reaction molecules in the solution to decrease, which will lead to the problem of reduced reaction efficiency. A connecting plate 28 is fixedly connected to the top of the top plate 17. Two support columns 27 are connected through the end of the connecting plate 28 away from the top plate 17 and are slidably connected to the support columns 27. The upper and lower ends of the two support columns 27 are respectively fixedly connected to a baffle 29 and a large gear 24. The bottom of the large gear 24 is rotatably connected to a second support seat 2 and a small gear 23 is meshed with its side wall. A positioning shaft 25 is fixedly connected to the center of the second support seat 2, and the top of the positioning shaft 25 passes through the large gear 24 and is rotatably connected to the large gear 24. The top of the positioning shaft 25 is fixedly connected to a mounting base 251, and the top of the mounting base 251 is fixedly connected to a second electric actuator 26. The top of the output shaft of the second electric actuator 26 is fixedly connected to the lower surface of the connecting plate 28 and to the positioning shaft 25. The ends are located on the same vertical line. A mounting plate 21 is fixedly connected to the arc-shaped side wall of the second support 2, and a motor 22 is fixedly connected to the bottom of the mounting plate 21. The output shaft of the motor 22 passes through the mounting plate 21 and is fixedly connected to the center of the pinion 23. Multiple gripping rods are fixedly connected to the arc-shaped side wall of the second sealing cover 151. When the external controller calculates the amount of ore reactant in the current leaching cage 15 reduced to the range that needs to be replenished based on the tension detection signal obtained by the tension detector 181, the connecting plate 28 is first lifted upward by the output shaft of the second electric push rod 26, which drives the top plate 17 to rise upward, so that the top plate 17 drives the first sealing cover 14 to separate from the impurity removal cover 13. Before this, the output shaft of the first electric push rod 18 has already lifted the connecting plate 28. The leaching cage 15 rises to reduce the safe lifting height required for the first sealing cover 14 to move horizontally after it is completely detached from the impurity removal hood 13. This reduces the wear and tear on the second electric push rod 26 and the replacement time of the ore reactants, thereby improving the replacement efficiency of the ore reactants. Once the first sealing cover 14 is completely detached from the impurity removal hood 13 and both it and the leaching cage 15 are at a safe height, the motor 22 is started, and the output shaft of the motor 22 drives the mounting plate 21 to rotate. Through its meshing connection with the large gear 24, the large gear 24 is driven to rotate. When the large gear 24 rotates, the support column 27 fixedly connected to the large gear 24 also rotates, thereby driving the connecting plate 28 and the components fixedly connected to the connecting plate 28. The top plate 17 rotates, ultimately achieving the horizontal transfer of the top plate 17, support plate 16, leaching cage 15, and first sealing cover 14. After being transferred to a safe position, the control motor 22 stops, and the output shaft of the second electric push rod 26 is lowered again, thereby driving the leaching cage 15 to a safe position that is easy to disassemble. While fixing the leaching cage 15, the technician grabs the gripping rod on the side wall of the second sealing cover 151 and rotates the second sealing cover 151. By utilizing the fixed connection between the top of the second sealing cover 151 and the bearing 161, the second sealing cover 151, which is threaded to the top of the leaching cage 15, can be rotated and removed by the rotation of the bearing 161. This facilitates the removal of the remaining ore reactants from the leaching cage 15 for replacement or the addition of new ore reactants.

[0029] Working principle: In the wet recycling process of waste lithium batteries, battery powder is generally mixed with a solution of corresponding proportion. After the battery powder reacts fully, the valuable metals in it dissolve into the solution in ionic form. Finally, the mixture is separated and purified by chemical methods to remove impurities. In the separation and purification process, the reaction solution containing valuable metal ions from the waste batteries is first poured into the reaction vessel 1. Then, the ore reactants of the corresponding solution proportion are loaded into the leaching cage 15, and the leaching cage 15 is lowered through the through groove on the first sealing cover 14. The ore reactants are submerged in the solution within the reaction vessel 1, allowing them to chemically react with the solution. During this process, the submergence of the leaching cage 15 is controlled as needed to ensure the reaction solution completely submerges the ore reactants, guaranteeing a sufficient reaction. Subsequently, a reducing gas, such as air or oxygen, is introduced into the reaction vessel 1. The reducing gas from the external gas supply device is introduced into the inlet pipe 10 through the first connecting pipe 101. The reducing gas then flows upwards from the bottom of the reaction vessel 1, not only removing the precipitate at the bottom of the reaction vessel 1 but also... The sediment at the bottom of the reactor is rolled up to the middle of the solution, and the solution is stirred so that the sediment at the bottom of the reactor 1 can react fully with the stirred solution again. At the same time, the reducing gas introduced can also accelerate the redox reaction between the ore reactants and the solution, thereby accelerating the redox rate of valuable metal ions in the solution and improving the separation and purification efficiency. During the process of introducing the reducing gas, the reducing gas first enters the air inlet chamber 311 through multiple jet holes on the air inlet pipe 10. Since the two ends of the second connecting pipe 32 are connected to the air inlet chamber 311 and the cavity of the stirring plate 33 respectively, the air in the air inlet chamber 311 enters the stirring plate 33 through the second connecting pipe 32, and finally exits through the exhaust hole opened on the stirring plate 33. The reducing gas exiting from the exhaust hole, on the one hand, uses the thrust of the gas on the solution to make the stirring plate 33 rotate in a circle, achieving the effect of stirring the solution and the bottom sediment. On the other hand, the exhaust bubbles rise evenly with the rotation of the stirring plate 33, which can not only improve the uniformity of the reaction between the reducing gas and the solution, but also increase the contact area for the bubbles to carry light impurities to rise. When it is necessary to adjust the tilt angle of the stirring plate 33, simply pinch the gripper groove with your fingers and press down on the rotating block 36. During its descent, the gripper 37 will continuously push the locking block 37 out of the semi-circular teeth, and push the limiting shaft 38 downward to compress the spring 391, thus releasing the limiting effect on the semi-circular teeth and allowing the right-angle ring 35 to rotate freely. Then, rotate the rotating block 36. The semi-circular teeth on the rotating block 36 will still mesh with the semi-circular teeth on the right-angle ring 35, causing the right-angle ring 35 to rotate. As the right-angle ring 35 rotates, the three transmission gears 34 that mesh with the bottom annular teeth of the right-angle ring 35 will also drive the second connecting pipe 32 around the second connecting pipe 32. The rotation of the ring causes the stirring plate 33 to rotate, thereby adjusting the tilt angle of the stirring plate 33. This changes the contact area between the reducing gas and the reactants, as well as the amount of reactants scooped up by the stirring plate 33, thus allowing for free adjustment of the reaction rate. During the rotation of the right-angle ring 35, the locking block 37 remains in contact with the lower surface of the rotating block 36 through the thrust of the limiting shaft 38, as the spring 391 elastically resets upward. When it is necessary to stop the rotation, the rotating block 36 is lifted upward and rotated slowly. At this time, the locking block 37 will rise with the rotating block 36 and engage with the corresponding groove of the semi-circular teeth during the slow rotation of the rotating block 36, thus re-limiting the right-angle ring 35 and achieving the effect of conveniently adjusting the tilt angle of the stirring plate 33. During the impurity removal process, the output shaft of the first electric actuator 18 is controlled to move vertically, driving the support plate 16 and the leaching cage 15 to move synchronously. This causes the leaching cage 15, containing the ore reactants, to sink into the solution and react chemically. The leaching cage 15 can be intermittently lowered multiple times according to the reaction requirements. This accelerates the entry of the solution into the leaching cage 15 through the bottom opening, increasing the reaction rate between the solution and the ore reactants. Simultaneously, the intermittent lowering of the leaching cage 15, controlled by the lifting and lowering motion of the first electric actuator 18, causes the solution in the reaction vessel 1 to overflow intermittently during the intermittent lowering of the leaching cage 15. This allows the solution to undergo multiple filtrations in the filter 131 and promotes continuous circulation of the solution through the water pump 4. The vertical lifting and lowering of the first electric actuator 18 and the intermittent lowering of the leaching cage 15 further facilitate this process. During the descent process, each descent of the leaching cage 15 passes through the guide seat 141 and slides on its surface. During this time, the limiting block 142 fixedly connected to the guide seat 141 will rotate at a certain angle due to the sliding connection with the threaded groove 152. The rotating leaching cage 15 is more conducive to the solution entering the leaching cage 15 and reacting more fully with the ore reactants, and throwing the reactants out, thereby further improving the reaction efficiency between the solution and the ore reactants. When the leaching cage 15 rotates, the centrifugal force inside the leaching cage 15 can be increased by multiple evenly distributed stirring blocks 153, which accelerates the speed at which the solution and reactant fragments are thrown out of the leaching cage 15 and increases the speed at which the solution enters the leaching cage 15. The solution that enters the leaching cage 15 at an accelerated rate will wash the surface of the ore reactants, thereby accelerating the falling off of the reactant fragments on the surface of the ore reactants and improving the reaction efficiency between the solution and the ore reactants. When the leaching cage 15 sinks into the solution with the ore reactants, the solution level will rise and eventually overflow the top of the filter 131 and reach the inlet of the water pump 4 through the fourth connecting pipe 42. During this process, the water pump 4 is started, and the solution filtered by the filter 131 is discharged into the circular cavity of the outlet plate 43 through the third connecting pipe 41. Then, the filtered solution is refilled into the bottom of the reactor 1 by multiple evenly distributed outlet holes connected to the circular cavity. On the one hand, the circulating solution impacts the sediment at the bottom of the reactor 1, causing it to be carried back to the middle of the solution to continue participating in the rapid reaction, thereby improving the uniformity and efficiency of the reaction.

[0030] During the reaction, the liquid level sensor 11 monitors the liquid level in the reactor 1 in real time and transmits the signal to the external controller. The external controller will remind the relevant technicians to replenish the solution when the liquid level drops to the point where it needs to be replenished, so as to avoid the problem of reduced reaction efficiency caused by the liquid level dropping. At the same time, if the liquid level is too low, the solution will not be able to overflow when the leaching cage 15 descends, which will prevent the solution from entering the reactor 1 through the water pump 4 to complete the continuous circulation. At this time, the sediment at the bottom of the reactor 1 can no longer be flushed up by the circulating water flow. The continuous accumulation of sediment will also reduce the concentration of reaction molecules in the solution, which will lead to the problem of reduced reaction efficiency. In addition, by installing a tension detector 181 between the bottom of the output shaft of the first electric push rod 18 and the support plate 16, when the output shaft of the first electric push rod 18 pulls the support plate 16 upward, the tension detector 181 will detect the tension required to pull the support plate 16 and the leaching cage 15 upward. By comparing the tension data of the initial full load of ore reactants recorded in advance by the external controller, it can be known how much the ore reactants in the leaching cage 15 have decreased. This allows technicians to replenish the ore reactants in a timely manner when they are consumed to the point where they need to be replenished, ensuring that the reaction efficiency between the solution and the ore reactants can be maintained continuously at a high level. When the external controller calculates, based on the tension detection signal from the tension detector 181, that the amount of ore reactant in the leaching cage 15 has decreased to the point where replenishment is needed, it first lifts the connecting plate 28 upwards via the output shaft of the second electric push rod 26, causing the top plate 17 to rise. This allows the top plate 17 to disengage the first sealing cover 14 from the impurity removal hood 13. Prior to this, the leaching cage 15 has already been lifted upwards via the output shaft of the first electric push rod 18. This is to reduce the safe lifting height required for the first sealing cover 14 to move horizontally after it has completely disengaged from the impurity removal hood 13, thereby reducing the wear of the second electric push rod 26 and the replacement and replenishment time of the ore reactant, and thus improving the replacement and replenishment efficiency of the ore reactant. Once the first sealing cover 14 has completely disengaged from the impurity removal hood 13 and is at a safe height with the leaching cage 15, the motor 22 is started, and the output shaft of the motor 22 drives the mounting plate 21 to rotate. Through its meshing connection with the large gear 24, the mounting plate 21 rotates. When the large gear 24 rotates, the support column 27 fixedly connected to the large gear 24 also rotates, thereby driving the connecting plate 28 and the top plate 17 fixedly connected to the connecting plate 28 to rotate. This ultimately achieves the horizontal transfer of the top plate 17, support plate 16, leaching cage 15, and first sealing cover 14. After being transferred to a safe position, the control motor 22 stops, and the output shaft of the second electric push rod 26 is lowered again, thereby driving the leaching cage 15 to a safe position that is easy to disassemble. While fixing the leaching cage 15, the technician grabs the grab bar on the side wall of the second sealing cover 151 and rotates the second sealing cover 151. By utilizing the fixed connection between the top of the second sealing cover 151 and the bearing 161, the second sealing cover 151, which is threaded to the top of the leaching cage 15, can be rotated and removed by the rotation of the bearing 161. This makes it easy to remove the remaining ore reactants from the leaching cage 15 for replacement or the addition of new ore reactants.

[0031] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A purification device for wet recycling of waste lithium batteries, characterized in that, include: The reactor (1) used for solution reaction has a first support base (12) at the bottom sealed by bolts. The top of the reactor (1) is fitted with a cleaning cover (13), and the top of the cleaning cover (13) is sealed with a first sealing cover (14). The first sealing cover (14) has a through groove at its center and a leaching cage (15) containing ore reactants is slidably connected in the through groove. The top of the leaching cage (15) is threaded with a second sealing cover (151), and the lower half of the outer wall has multiple evenly distributed through holes. The first support base (12) has an air inlet pipe (10) fixed through its center, and the bottom end of the air inlet pipe (10) is connected to a first connecting pipe (101) for conveying reducing gas. The top end of the air inlet pipe (10) is provided with a stirring mechanism (3) for stirring the sediment at the bottom of the reactor (1). The stirring mechanism (3) includes a rotating block (31) rotatably connected to the top end of the air inlet pipe (10). The upper and lower ends of the rotating block (31) are respectively provided with mounting grooves (312) and air inlet chambers (311). The air inlet pipe (10) Multiple jet holes are provided on the arc-shaped wall at the end of the air intake chamber (311). Three evenly distributed second connecting pipes (32) are fixed through the side wall of the air intake chamber (311), and a stirring plate (33) is connected to the end of the second connecting pipe (32) away from the air intake chamber (311). A cavity is provided in the stirring plate (33), and the cavity is connected to the air intake chamber (311) through the second connecting pipe (32). The stirring plate (33) is inclined, and multiple exhaust holes connected to the internal cavity are provided on the higher side.

2. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 1, characterized in that: The end of the stirring plate (33) is teardrop-shaped, and the side with a larger curvature is set as the higher side. Multiple air jet holes on the stirring plate (33) are evenly distributed.

3. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 1, characterized in that: The second connecting pipe (32) is located between the stirring plate (33) and the rotating block (31) and is fitted with a transmission gear (34). The top of the rotating block (31) is rotatably connected to a right-angle ring (35). The bottom of the right-angle ring (35) is provided with an annular tooth groove, which meshes with the top of the three transmission gears (34). The center of the transmission gear (34) is provided with a limiting groove, and a rotating block (36) is slidably connected in the limiting groove. The top of the rotating block (36) is provided with three gripping grooves for easy pinching. The arc-shaped sidewall of the rotating block (36) is provided with a semi-circular tooth groove. The limiting groove of the right-angle ring (35) The inner wall is provided with semi-circular teeth that are adapted to the semi-circular tooth groove, and the semi-circular teeth are meshed with the semi-circular tooth groove. The bottom of the rotating block (36) is fitted with a locking block (37), and one end of the locking block (37) is locked in the tooth groove of the semi-circular teeth. The bottom end of the locking block (37) is fixedly connected to a limiting shaft (38). The bottom end of the limiting shaft (38) is inserted into a limiting sleeve (39) and is slidably connected to the limiting sleeve (39). The bottom of the limiting shaft (38) and the bottom of the limiting sleeve (39) are fixedly connected to a spring (391). The height of the semi-circular tooth groove is less than the height of the limiting groove and greater than the thickness of the locking block (37).

4. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 1, characterized in that: The bottom of the impurity removal hood (13) is fitted with an annular filter (131) that matches its contour. The filter (131) is divided into an annular support box and multiple annular wavy filter layers. The top of the annular support box is provided with a U-shaped groove that matches its contour, and the multiple annular wavy filter layers are evenly installed in the U-shaped groove. The bottom of the U-shaped groove and the bottom of the filter (131) are connected by a fourth connecting pipe (42). The bottom of the first support base (12) is fixedly installed with a water pump (4). The water inlet of the water pump (4) is connected to the bottom of the fourth connecting pipe (42). The reactor (1) is connected to the bottom of the inner wall of the reactor (1) with a water outlet plate (43) fixedly connected to it. The water outlet plate (43) is connected to the air inlet pipe (10) through it. The water outlet plate (43) has a circular cavity that matches its contour. The top of the circular cavity has multiple evenly distributed water outlet holes and the drain holes are connected to the circular cavity inside the reactor (1). The water outlet of the water pump (4) is connected to a third connecting pipe (41). The top of the third connecting pipe (41) passes through and fixes the first support base (12) and the water outlet plate (43) in sequence, and is connected to the circular cavity inside the water outlet plate (43).

5. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 1, characterized in that: A support plate (16) is provided directly above the leaching cage (15), and a bearing (161) is provided between the leaching cage (15) and the support plate (16). The top of the outer ring of the bearing (161) is fixedly connected to the lower surface of the support plate (16), and the bottom of the inner ring of the bearing (161) is fixedly connected to the upper surface of the leaching cage (15). A top plate (17) is provided directly above the support plate (16), and a first electric push rod (18) is fixedly connected to the center of the top of the top plate (17). The output shaft of the first electric push rod (18) passes through the top plate (17) and is connected to the support plate (16). Three evenly distributed connecting rods (19) are fixedly connected to the lower surface of the top plate (17). The bottom ends of the three connecting rods (19) pass through the support plate (16) and are fixedly connected to the top of the first sealing cover (14).

6. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 1, characterized in that: Two evenly distributed threaded grooves (152) are provided on the leaching cage (15). The top of the first sealing cover (14) is fixedly connected to two guide seats (141) that are slidably connected to the outer wall of the leaching cage (15). The guide seats (141) are fixedly connected to a limiting block (142) that is adapted to the threaded groove (152) on one side of the leaching cage (15), and the limiting block (142) is slidably connected in the threaded groove (152).

7. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 5, characterized in that: The bottom end of the output shaft of the first electric push rod (18) is fixedly connected to a tension detector (181) that is electrically connected to an external controller, and the bottom of the tension detector (181) is fixedly connected to the upper surface of the support plate (16).

8. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 1, characterized in that: The immersion cage (15) has multiple uniformly distributed stirring blocks (153) fixedly connected to the arc-shaped side wall near the bottom.

9. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 8, characterized in that: A liquid level sensor (11) is fixedly installed on the inner wall near the top of the reactor (1), and the liquid level sensor (11) is electrically connected to an external controller.

10. The impurity removal equipment for wet recycling of waste lithium batteries according to claim 7, characterized in that: A connecting plate (28) is fixedly connected to the top of the top plate (17). Two support columns (27) are connected through the end of the connecting plate (28) away from the top plate (17) and are slidably connected to the support columns (27). The upper and lower ends of the two support columns (27) are respectively fixedly connected to a baffle (29) and a large gear (24). The bottom of the large gear (24) is rotatably connected to a second support seat (2) and a small gear (23) is meshed with its side wall. A positioning shaft (25) is fixedly connected to the center of the second support seat (2) and the top of the positioning shaft (25) passes through the large gear (24) and is rotatably connected to the large gear (24). The positioning shaft (29) is fixedly connected to the top of the top plate (17) and is rotatably connected to the large gear (24). 5) The top of the mounting base (251) is fixedly connected to the mounting base (251) and the top of the mounting base (251) is fixedly connected to the second electric push rod (26). The top of the output shaft of the second electric push rod (26) is fixedly connected to the lower surface of the connecting plate (28) and is located on the same vertical line as the end of the positioning shaft (25). The arc-shaped side wall of the second support base (2) is fixedly connected to the mounting plate (21) and the bottom of the mounting plate (21) is fixedly connected to the motor (22). The end of the output shaft of the motor (22) passes through the mounting plate (21) and is fixedly connected to the center of the pinion (23). The arc-shaped side wall of the second sealing cover (151) is fixedly connected to multiple gripping rods for easy gripping.

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