Mineral gravity centrifugal sorting device

Abstract

The invention belongs to the technical field of mineral centrifugal separation, and discloses a mineral gravity centrifugal separation device which comprises a mounting frame, a shell is fixedly connected to the top of the mounting frame, the side wall of the shell fixedly communicates with a discharging port, a cover plate is mounted at the top of the shell, and a U-shaped water inlet pipe, an annular pipe, an annular baffle, a water spraying pipe and other structures are arranged to be matched. After discharging is completed, the U-shaped water inlet pipe drives the annular baffle to press downwards, the discharging pipe is sealed, diluted ore pulp after cleaning cannot enter the rotary drum to affect centrifugal layering, then through structural linkage, the water spraying pipe is changed into an obliquely-upward state from an obliquely-downward state, and therefore a hollow inner cavity of the ball shaft and a cavity of the annular pipe communicate with each other; therefore, clear water can pass through the L-shaped sleeve and the annular pipe and is finally sprayed out of the water spraying pipe in an inclined upward mode to wash the inner wall of the discharging pipe from top to bottom, and the sewage discharging pipe is matched, so that washing and suction sewage discharging are conducted at the same time, and the situation that sewage leaks into the rotary drum and influences the centrifugal layering effect is avoided.

Description

Technical Field

[0001] This invention belongs to the field of mineral centrifugal separation technology, specifically a mineral gravity centrifugal separation device. Background Technology

[0002] Mineral processing centrifuges utilize centrifugal force to collect useful minerals from fine mud, such as placer gold, vein gold, cassiterite, wolframite, hematite, ilmenite, and lead-zinc ore. By using the centrifugal force generated by high-speed rotation, they accelerate the sedimentation of fine heavy mineral particles. The centrifugal force can be hundreds of times that of gravity, thus achieving efficient separation. A centrifugal mineral sorting device, disclosed in prior art document CN110142153B, includes an upper chamber, a lower chamber fixedly connected to the lower part of the upper chamber, a feeding mechanism fixedly connected to the upper end of the upper chamber, a sorting mechanism rotatably connected to the middle of the upper chamber, a hollow shaft fixedly connected to the lower end of the sorting mechanism, a metal mesh fixedly connected to the upper end of a filter tank, a filter pad fixedly connected to the lower surface of the metal mesh, and a connecting pipe connecting the upper chamber and the filter tank. The sorting wastewater flows into the filter tank after being filtered by the metal mesh and the filter pad, and is reused after being supplied by a water supply mechanism. A waste discharge mechanism is provided on the right side of the lower chamber to facilitate the discharge of filtered materials. This invention has a reasonable structure, is easy to use, and can filter the wastewater generated after sorting for reuse, thereby saving water resources. The waste discharge mechanism design facilitates the discharge of filtered materials. Although the above-mentioned device filters and reuses the wastewater generated after sorting by setting up a waste discharge mechanism, and facilitates the discharge of filtered materials, it does not improve the slurry feeding process. The mud concentration is highest at the feeding pipe, and it is most likely to stick to the wall. If the overall flushing is carried out after sorting is completed, the mud on the pipe wall will easily dry and form scale, making it difficult to clean. Summary of the Invention

[0003] The purpose of this invention is to provide a mineral gravity centrifugal sorting device that enables real-time automatic cleaning of the feeding pipe and uniform film feeding, in order to solve the problems mentioned in the background art. To achieve the above objectives, the present invention provides the following technical solution: a mineral gravity centrifugal sorting device, comprising a mounting frame, a housing fixedly connected to the top of the mounting frame, a discharge port fixedly connected to the side wall of the housing, a cover plate installed on the top of the housing, a valve disposed above the cover plate, a hopper connected to the top of the valve, and a rotating drum rotatably connected to the inner cavity of the housing, and further comprising: A real-time cleaning mechanism, located inside the housing; A uniform feeding mechanism, which is connected to a real-time cleaning mechanism; The real-time cleaning mechanism includes a feed pipe fixedly passing through the middle of the cover plate. The top of the feed pipe is fixed to a valve, and an annular pipe is fixed to the feed pipe through a second bracket. A cavity is opened on the lower side of the annular pipe. The real-time cleaning mechanism is located inside the outer shell and can continuously clean the inside of the equipment to prevent the slurry from clumping or blocking, ensuring the smoothness of the sorting process. The uniform feed mechanism is connected to the real-time cleaning mechanism to ensure the uniform distribution of the slurry and the synchronous cleaning effect, thereby enhancing the stability and efficiency of the entire sorting device. Preferably, the real-time cleaning mechanism further includes an electric push rod fixed to the top of the cover plate, the output end of the electric push rod is fixed to a squeezing plate, a pair of pull rods are rotatably connected to both sides of the squeezing plate, and the ends of the pair of pull rods are jointly fixed to a ring block. Preferably, a U-shaped water inlet pipe is fixedly inserted through the side wall of the ring block, and the U-shaped water inlet pipe is sleeved on the side wall of the feed pipe. Preferably, an annular baffle is fixedly inserted through the lower side of the U-shaped water inlet pipe, the annular baffle is slidably sleeved on the lower end inner cavity of the feed pipe, and a sealing ring is fixedly connected to the bottom of the annular baffle. Preferably, an L-shaped sleeve is fitted onto the inner end of the U-shaped water inlet pipe, the L-shaped sleeve is fixedly connected to the cavity of the annular pipe, a plurality of ball shafts are equidistantly rotatably connected to the outer side of the annular pipe, and the ball shafts are hollow. A water spray pipe is fixedly connected to the outer side of each ball shaft, and a protective cover is fixedly connected to the end of each water spray pipe. A water outlet hole is opened in the cavity of the annular pipe near the ball shaft. Preferably, the outer wall of the water spray pipe is slidably fitted with an annular sleeve, and the outer side of the annular sleeve is movably connected with an arc-shaped rod. The ends of multiple arc-shaped rods are rotatably connected to a spiral sleeve column, and the inner cavity of the spiral sleeve column is movably fitted with a sleeve. The top of the sleeve is fixed to the bottom of the annular pipe. Preferably, the outer wall of the spiral sleeve is movably connected to an upper sliding sleeve via an arc-shaped protrusion. A lower sliding sleeve is fixedly connected to the bottom of the upper sliding sleeve, and the lower end of the lower sliding sleeve is fixedly connected to the outer wall of the U-shaped water inlet pipe via a fixing rod. The movement of the ring block drives the U-shaped water inlet pipe and the sewage pipe on both sides to move downward together, so that the feed pipe forms a relatively sealed space. At this time, the sealing ring is in close contact with the surface of the arc plate, effectively preventing the diluted slurry from entering the drum and ensuring that the washing water in the feed pipe will not affect the sorting inside the drum. Preferably, the uniform feeding mechanism includes a first bracket fixed to the inner wall of the upper end of the feeding pipe, and a dome guide rod rotatably connected to the middle of the first bracket. The dome guide rod movably passes through the annular pipe, the sleeve and the sliding sleeve respectively. Preferably, an arc plate is fixedly connected to the lower end of the dome guide rod, and several guide vanes are uniformly fixedly connected to the top of the arc plate; the slurry disperses on the bottom arc plate, and under the action of the guide vanes, the arc plate rotates, thereby causing the slurry to spread out and become a uniform film that diffuses outward. Preferably, a drain pipe is fixedly inserted through the side of the ring block away from the U-shaped water inlet pipe, and the lower end of the drain pipe is fixedly connected to the side wall of the annular baffle through the discharge hole; the sewage generated during the cleaning process will enter the external sewage pump through the drain pipe, and the sewage will be continuously discharged, avoiding sewage leakage into the drum, preventing adverse effects on the subsequent sorting process, reducing the difficulty of equipment maintenance, and effectively improving the service life of the equipment. Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated arrangement of a U-shaped water inlet pipe, annular pipe, annular baffle, and spray pipe, facilitates immediate cleaning of the pipe wall after material feeding. After feeding, the U-shaped water inlet pipe drives the annular baffle to press down, sealing the feeding pipe and preventing diluted slurry from entering the rotating drum 90° and affecting centrifugal stratification. Then, through structural linkage, the spray pipe changes from a downward angle to an upward angle, thereby connecting the hollow inner cavity of the ball shaft with the cavity of the annular pipe. This allows clean water from the U-shaped water inlet pipe to pass through the L-shaped sleeve and annular pipe, and finally spray out upward from the spray pipe, rinsing the inner wall of the feeding pipe from top to bottom. In conjunction with the drain pipe, rinsing and sewage suction are carried out simultaneously, preventing sewage from leaking into the rotating drum and affecting the centrifugal stratification effect. This invention facilitates uniform slurry feeding by using a combination of structures such as a dome-shaped guide rod, an arc plate, and guide vanes. The dome-shaped guide rod disperses the slurry, feeding it evenly along the pipe wall. Upon reaching the bottom arc plate, the slurry is further dispersed. Under the action of the guide vanes, the arc plate rotates, instantly spreading the concentrated slurry flow into a uniform, annular thin layer that smoothly enters the rotating drum. This allows for synchronous acceleration with the drum wall and the formation of a uniform flow film from the outset. As the slurry enters the drum, it does not directly impact any particular area, effectively increasing the centrifugal separation speed. Attached Figure Description Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the side cross-section structure of the present invention; Figure 4 This is a schematic diagram showing the structural fit between the U-shaped water inlet pipe and the discharge pipe of the present invention; Figure 5 For the present invention Figure 4 A magnified view of the structure at point A in the middle; Figure 6This is a schematic diagram showing the structural fit between the L-shaped sleeve and the U-shaped water inlet pipe of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle; Figure 8 For the present invention Figure 6 A magnified schematic diagram of the structure at point C in the middle; Figure 9 This is a top view of the structure of the present invention; Figure 10 This is a schematic diagram showing the structural fit between the annular tube and the sleeve of the present invention; Figure 11 This is a schematic diagram showing the structural relationship between the annular baffle and the sewage pipe of the present invention. In the picture: 100. Mounting bracket; 200. Housing; 300. Discharge port; 400. Cover plate; 500. Valve; 600. Hopper; 700. Real-time cleaning mechanism; 710. Electric actuator; 720. Extrusion plate; 730. Pull rod; 740. Ring block; 750. Discharge pipe; 760. U-shaped water inlet pipe; 770. L-shaped sleeve; 780. Upper sliding sleeve; 790. Lower sliding sleeve; 7100. Fixing rod; 7110. Annular baffle; 7120. Sealing ring; 71 30. First support; 7140. Second support; 7150. Water spray pipe; 7160. Arc rod; 7170. Ring sleeve; 7180. Protective cover; 7190. Ball shaft; 7200. Annular pipe; 7210. Sleeve; 7220. Arc-shaped protrusion; 7230. Spiral sleeve column; 800. Uniform feeding mechanism; 810. Arc plate; 820. Guide vane; 830. Sewage pipe; 840. Discharge hole; 850. Dome guide rod; 900. Rotary drum. Detailed Implementation The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. like Figures 1 to 11 As shown, the present invention provides a mineral gravity centrifugal sorting device, including a mounting frame 100, a housing 200 fixedly connected to the top of the mounting frame 100, a discharge port 300 fixedly connected to the side wall of the housing 200, a cover plate 400 installed on the top of the housing 200, a valve 500 provided above the cover plate 400, a hopper 600 connected to the top of the valve 500, and a drum 900 rotatably connected to the inner cavity of the housing 200. The device also includes: Real-time cleaning mechanism 700, which is located inside housing 200; Uniform feeding mechanism 800, which is connected to real-time cleaning mechanism 700; The real-time cleaning mechanism 700 includes a feed pipe 750 that is fixedly inserted through the middle of the cover plate 400. The top of the feed pipe 750 is fixedly connected to the valve 500. The feed pipe 750 is fixedly connected to an annular pipe 7200 through a second bracket 7140. A cavity is opened on the lower side of the annular pipe 7200. The above-mentioned scheme employs the following: The mounting frame 100 supports the entire outer casing 200. The top cover 400 of the outer casing 200, together with the valve 500, constitutes the top control section of the equipment. The hopper 600 is connected to the discharge pipe 750 via the valve 500, guiding the slurry into the equipment. The discharge pipe 750 is fixedly connected to the annular pipe 7200 via a second bracket 7140. The cavity design of the annular pipe 7200 helps ensure the uniformity of slurry flow. Simultaneously, the real-time cleaning mechanism 700, located inside the outer casing 200, continuously cleans the inside of the equipment, preventing slurry clumping or blockage and ensuring smooth separation. The uniform discharge mechanism 800 is connected to the real-time cleaning mechanism 700, ensuring the uniform distribution of slurry and the simultaneous cleaning effect, enhancing the stability and efficiency of the entire separation device. Through the orderly cooperation of these components, the device not only achieves uniform slurry distribution but also effectively reduces equipment wear and improves separation accuracy and efficiency throughout the entire separation process. The meticulous cleaning mechanism also avoids problems such as sewage leakage and slurry accumulation, greatly improving the overall working efficiency and operational safety of the equipment. like Figures 2 to 6 , Figures 9 to 11 As shown, the real-time cleaning mechanism 700 also includes an electric push rod 710 fixedly connected to the top of the cover plate 400. An extrusion plate 720 is fixedly connected to the output end of the electric push rod 710. A pair of pull rods 730 are rotatably connected to both sides of the extrusion plate 720. A ring block 740 is fixedly connected to the ends of the pair of pull rods 730. A U-shaped water inlet pipe 760 is fixedly inserted through the side wall of the ring block 740 and is sleeved on the side wall of the discharge pipe 750. An annular baffle 7110 is fixedly inserted through the lower side of the U-shaped water inlet pipe 760 and is slidably sleeved on the discharge pipe 750. The lower end of the inner cavity of the ring is fixedly connected to the bottom of the annular baffle 7110 with a sealing ring 7120; the inner end of the U-shaped water inlet pipe 760 is sleeved with an L-shaped sleeve 770, the L-shaped sleeve 770 is fixedly connected to the cavity of the annular pipe 7200, and several ball shafts 7190 are equidistantly rotatably connected to the outer side of the annular pipe 7200, and the ball shafts 7190 are hollow. The outer side of each ball shaft 7190 is fixedly connected to a water spray pipe 7150, and the end of each water spray pipe 7150 is fixedly connected to a protective cover 7180. The cavity of the annular pipe 7200 is provided with a water outlet near the ball shafts 7190. like Figures 6 to 8As shown, the outer wall of the water spray pipe 7150 is slidably fitted with annular sleeves 7170, and the outer side of the annular sleeves 7170 is movably connected with arc-shaped rods 7160. The ends of multiple arc-shaped rods 7160 are rotatably connected to a spiral sleeve column 7230. The inner cavity of the spiral sleeve column 7230 is movably fitted with a sleeve 7210, and the top of the sleeve 7210 is fixed to the bottom of the annular pipe 7200. The outer wall of the spiral sleeve column 7230 is movably connected to an upper sliding sleeve 780 through an arc-shaped protrusion 7220. The bottom of the upper sliding sleeve 780 is fixed to a lower sliding sleeve 790, and the lower end of the lower sliding sleeve 790 is fixed to the outer wall of the U-shaped water inlet pipe 760 through a fixing rod 7100. The above scheme works as follows: When the slurry flows downward from the feed pipe 750, it first impacts the top of the dome guide rod 850, causing the slurry to spread outwards under the action of the guide rod. Next, the slurry reaches the bottom arc plate 810, and under the guidance of the guide vanes 820, the arc plate 810 rotates. This creates a uniform film at the bottom of the slurry flow, which then spreads outwards. This design prevents the slurry from directly impacting a specific area when entering the drum 900, instead forming a uniform flow film, avoiding slurry accumulation, reducing localized wear, and improving flow stability during centrifugal separation. The uniform slurry flow effectively enhances the subsequent separation process while reducing the load on the slurry within the drum 900, resulting in more precise separation. With the feeding complete, to ensure continuous and efficient operation of the equipment, the electric push rod 710 is activated, pushing the extrusion plate 720 and the pull rod 730 towards the electric push rod 710, causing the ring block 740 to move downwards. The movement of the ring block 740 causes the U-shaped water inlet pipes 760 and the drain pipe 830 on both sides to move downwards together, creating a relatively sealed space in the feed pipe 750. At this time, the sealing ring 7120 is in close contact with the surface of the arc plate 810, effectively preventing the diluted slurry from entering the drum 900 and ensuring that the cleaning water in the feed pipe 750 will not affect the sorting in the drum 900. To further improve the cleaning effect, the sliding sleeve 790 of the U-shaped water inlet pipe 760 cooperates with the upper sliding sleeve 780 to ensure that the cleaning process can be carried out synchronously. The fixed rod 7100 drives the sliding sleeve 790 to slide downwards, further pushing the spiral sleeve column 7230 to rise along the spiral groove of the sleeve 7210, and pushing the arc rod 7160 to move upwards. When the arc rod 7160 rises, the ring sleeve 7170 pushes the end of the spray pipe 7150 to rotate, changing the spray pipe 7150 from its original downward angle to an upward angle. In this way, the clean water in the U-shaped water inlet pipe 760 passes through the L-shaped sleeve 770 and the annular pipe 7200, and is finally sprayed out through the spray pipe 7150, forming an effective cleaning effect. like Figure 4 , Figure 5 , Figure 10As shown, the uniform feeding mechanism 800 includes a first support 7130 fixed to the inner wall of the upper end of the feeding pipe 750. A dome guide rod 850 is rotatably connected to the middle of the first support 7130. The dome guide rod 850 movably passes through the annular pipe 7200, the sleeve 7210 and the sliding sleeve 790 respectively. An arc plate 810 is fixed to the lower end of the dome guide rod 850. Several guide vanes 820 are uniformly fixed to the top of the arc plate 810. A drain pipe 830 is fixedly passed through the side of the ring block 740 away from the U-shaped water inlet pipe 760. The lower end of the drain pipe 830 is fixedly connected to the side wall of the annular baffle 7110 through the discharge hole 840. The above-mentioned solution addresses the issue that if the slurry is fed in uneven, intermittent streams, fluctuations in the film thickness within the drum 900 will occur. With excessive feed, the film thickens, requiring longer times for light mineral particles to reach the surface, and insufficient internal looseness affects the settling velocity of heavy minerals. Conversely, with insufficient feed, the film becomes too thin, resulting in good bed looseness but reduced throughput. Furthermore, excessively high flow rates may even re-erase settled heavy minerals, making the centrifugal separation process difficult and slow. Therefore, immediately after feeding, clean water is continuously sprayed from multiple water pipes 7150 to flush the inner wall of the feed pipe 750 from top to bottom. This ensures immediate cleaning of the pipe wall after feeding, preventing the slurry from drying and hardening due to waiting until centrifugal separation is complete. Additionally, wastewater generated during cleaning is discharged through the drain pipe 830 into an external sludge pump, preventing leakage into the drum 900 and avoiding adverse effects on subsequent separation processes. This reduces the difficulty of equipment maintenance and effectively extends the service life of the equipment. By cleaning immediately after feeding, not only is work efficiency improved, but it also ensures that the slurry is not affected by wastewater during the sorting process, maintaining the high-efficiency operation of the equipment. Working principle and usage process of this invention: First, the mixed slurry is fed into hopper 600 for later use. When centrifugal separation of minerals from the slurry is required, valve 500 is activated to release the slurry, which falls into feed pipe 750 and finally reaches drum 900 for centrifugal separation. The slurry spreads on the inner wall of drum 900 to form a thin film. Under centrifugal force, denser heavy mineral particles, such as gold and cassiterite, quickly pass through the film, settle, and adhere to the inner wall of drum 900, forming a concentrate layer. Lighter minerals, i.e., less dense gangue, remain on the surface of the film. The light minerals on the surface move in a spiral motion along the axial slope of drum 900 with the slurry flow, and are continuously discharged from the overflow port as tailings. The heavy minerals on the inner wall of drum 900 are continuously enriched, and the concentrate is washed off the drum wall by a jet of water and then collected from the concentrate discharge port. Secondly, as the slurry moves downward through the feed pipe 750, it first impacts the top of the dome guide rod 850, spreading evenly outwards. Upon reaching the bottom arc plate 810, it disperses again, and under the action of the guide vanes 820, the arc plate 810 rotates, causing the slurry to spread outwards as a uniform film. This facilitates the formation of a uniform film from the start of feeding, preventing direct impact on any particular area when the slurry enters the rotating drum 900, effectively increasing the centrifugal separation speed in the next step. Next, after the feeding is complete, valve 500 is closed, and a fixed amount of slurry can be added to hopper 600 for later use. Then, the electric actuator 710 is activated, which pulls the extrusion plate 720 and the pull rod 730 towards the electric actuator 710, thereby causing the ring block 740 to move the U-shaped water inlet pipes 760 and the drain pipes 830 on both sides downwards. The two pipes together move the annular baffle 7110 downwards until the sealing ring 7120 abuts against the surface of the arc plate 810, thus forming a relatively sealed space inside the feeding pipe 750, which prevents the diluted slurry after cleaning from entering the drum 900 and affecting centrifugal stratification. Furthermore, as the U-shaped inlet pipe 760 moves downward, the fixed rod 7100 simultaneously drives the sliding sleeve 790 downward. The sliding sleeve 790 pulls the upper sliding sleeve 780 downward, and the arc-shaped protrusion 7220 fixed in the inner cavity of the upper sliding sleeve 780 continuously presses against the spiral groove of the spiral sleeve column 7230, causing the spiral sleeve column 7230 to spirally rise along the sleeve 7210, thereby pushing the arc-shaped rod 7160 upward. The upward-moving arc-shaped rod 7160 continuously pushes the end of the spray pipe 7150 upward through the ring sleeve 7170, causing the spray pipe 7150 to change from a downward angle to an upward angle. This allows the hollow inner cavity of the ball shaft 7190 to connect with the cavity of the annular pipe 7200, enabling the clean water in the U-shaped inlet pipe 760 to pass through the L-shaped sleeve 770 and the annular pipe 7200, and finally spray out from the spray pipe 7150 in an upward angle. Multiple water spray pipes 7150 continuously spray clean water, rinsing the inner wall of the feed pipe 750 from top to bottom. This allows for immediate cleaning of the pipe wall after feeding, avoiding the situation where a unified rinse is required after centrifugal separation, which can lead to the slurry drying and hardening, making it difficult to clean. The wastewater collected at the bottom of the U-shaped inlet pipe 760 can be pumped out via an external sludge pump connected to the drain pipe 830, continuously pumping out the wastewater during cleaning. This prevents wastewater from leaking into the rotary drum 900, and the discharged diluted slurry can be collected as initial slurry raw material, avoiding waste. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mineral gravity centrifugal sorting device, comprising a mounting frame (100), a housing (200) fixedly connected to the top of the mounting frame (100), a discharge port (300) fixedly connected to the side wall of the housing (200), a cover plate (400) installed on the top of the housing (200), a valve (500) provided above the cover plate (400), a hopper (600) connected to the top of the valve (500), and a rotating drum (900) rotatably connected to the inner cavity of the housing (200), characterized in that: Also includes: Real-time cleaning mechanism (700), the real-time cleaning mechanism (700) is located inside the housing (200); A uniform feeding mechanism (800) is connected to a real-time cleaning mechanism (700); The real-time cleaning mechanism (700) includes a feed pipe (750) fixedly passing through the middle of the cover plate (400). The top of the feed pipe (750) is fixed to the valve (500). The feed pipe (750) is fixed to an annular pipe (7200) through a second bracket (7140). A cavity is opened on the lower side of the annular pipe (7200).

2. The mineral gravity centrifugal sorting device according to claim 1, characterized in that: The real-time cleaning mechanism (700) also includes an electric push rod (710) fixed to the top of the cover plate (400). The output end of the electric push rod (710) is fixed to a pressing plate (720). A pair of pull rods (730) are rotatably connected to both sides of the pressing plate (720). The ends of the pair of pull rods (730) are fixed to a ring block (740).

3. The mineral gravity centrifugal sorting device according to claim 2, characterized in that: A U-shaped water inlet pipe (760) is fixedly inserted through the side wall of the ring block (740), and the U-shaped water inlet pipe (760) is sleeved on the side wall of the feed pipe (750).

4. The mineral gravity centrifugal sorting device according to claim 3, characterized in that: The lower side of the U-shaped water inlet pipe (760) is fixedly connected to an annular baffle (7110), which is slidably sleeved in the lower end cavity of the feed pipe (750). A sealing ring (7120) is fixedly connected to the bottom of the annular baffle (7110).

5. The mineral gravity centrifugal sorting device according to claim 4, characterized in that: The inner end of the U-shaped water inlet pipe (760) is fitted with an L-shaped sleeve (770), which is fixedly connected to the cavity of the annular pipe (7200). Several ball shafts (7190) are equidistantly rotatably connected to the outer side of the annular pipe (7200), and the ball shafts (7190) are hollow. A water spray pipe (7150) is fixedly connected to the outer side of each ball shaft (7190), and a protective cover (7180) is fixedly connected to the end of each water spray pipe (7150). A water outlet is opened in the cavity of the annular pipe (7200) near the ball shaft (7190).

6. The mineral gravity centrifugal sorting device according to claim 5, characterized in that: The outer wall of the water spray pipe (7150) is slidably fitted with a ring sleeve (7170), and the outer side of the ring sleeve (7170) is movably connected with an arc rod (7160). The ends of multiple arc rods (7160) are rotatably connected to a spiral sleeve column (7230). The inner cavity of the spiral sleeve column (7230) is movably fitted with a sleeve (7210), and the top of the sleeve (7210) is fixed to the bottom of the annular pipe (7200).

7. The mineral gravity centrifugal sorting device according to claim 6, characterized in that: The outer wall of the spiral sleeve (7230) is movably connected to the upper sliding sleeve (780) via the arc-shaped protrusion (7220). The bottom of the upper sliding sleeve (780) is fixedly connected to the lower sliding sleeve (790), and the lower end of the lower sliding sleeve (790) is fixedly connected to the outer wall of the U-shaped water inlet pipe (760) via the fixing rod (7100).

8. The mineral gravity centrifugal sorting device according to claim 7, characterized in that: The uniform feeding mechanism (800) includes a first bracket (7130) fixed to the inner wall of the upper end of the feeding pipe (750). A dome guide rod (850) is rotatably connected to the middle of the first bracket (7130). The dome guide rod (850) movably passes through the annular pipe (7200), the sleeve (7210) and the sliding sleeve (790).

9. The mineral gravity centrifugal sorting device according to claim 8, characterized in that: The lower end of the dome guide rod (850) is fixedly connected to an arc plate (810), and a number of guide vanes (820) are uniformly fixedly connected to the top of the arc plate (810).

10. The mineral gravity centrifugal sorting device according to claim 9, characterized in that: A drain pipe (830) is fixedly inserted through the side of the ring block (740) away from the U-shaped water inlet pipe (760), and the lower end of the drain pipe (830) is fixedly connected to the side wall of the annular baffle (7110) through the discharge hole (840).

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