Disc separator outer ring slagging structure

Abstract

This invention discloses an outer ring slag discharge structure for a disc separator, including a rotating system and a disc assembly structure. The rotating system includes a rotating shell, a piston body, and a sealing base plate. The rotating shell includes an upper shell and a lower shell, with a slag discharge port circumferentially formed at the connection end between the upper and lower shells. A piston body is located outside the slag discharge port, and a sealing base plate is located on the lower side of the piston body. A stroke gap is formed between the sealing base plate and the lower shell to allow the piston body to move up and down. A piston control part is located between the lower side of the piston body and the sealing base plate, including a throwing block and a lifting inclined surface. The lifting inclined surface is located on the lower end face of the piston body. The throwing block moves radially under the centrifugal force of rotation, cooperating with the lifting inclined surface to move the piston body upward and close the slag discharge port. The centrifugal force generated by the throwing block causes the surrounding throwing blocks to move synchronously away from the center. The movement of the throwing blocks and their cooperation with the lifting inclined surface keep the piston body moving upward and closing the slag discharge port. This method, which requires constant pressure water to push the piston upward in the prior art, has the advantages of convenient control and low cost.

Description

Technical Field

[0001] This invention relates to the field of disc separator technology, specifically to an outer ring slag discharge structure for a disc separator. Background Technology

[0002] The disc separator is a high-speed sedimentation centrifuge. During operation, the main functional component, the drum, rotates at high speed around its axis. With its high speed and the powerful centrifugal force generated, it can quickly and effectively separate two mixtures of liquids and solids with different specific gravities. Due to its high efficiency, it is widely used in industries such as shipbuilding, food, medicine, chemical, textile and environmental protection.

[0003] Disc separators are fluid machines that separate materials by utilizing the different centrifugal forces generated within a rotating drum to separate immiscible mixtures of varying densities. There are many types of disc separators, which can be categorized by their slag discharge method into manual discharge, piston discharge, and nozzle discharge types. Currently, piston discharge is the most widely used, enabling fully automatic variable discharge controlled by electricity. The piston is located inside the rotating drum, and slag is discharged through its up-and-down movement. The piston's movement is typically controlled by pressurized water, which opens or closes the discharge port. For example, Patent Document 1, Application No. CN201310425361.6, discloses a high-performance disc separator drum; and Patent Document 2, Application No. CN201921451424.4, discloses a disc separator. Both of them include a drum body, with a piston for slag discharge assembled inside the drum body. Water is controlled to enter a sealed water chamber below the piston, thereby pushing the piston upward and sealing the slag discharge port. At this time, the drum body forms a seal. The basic principle of slag discharge is: when slag discharge is required, the drain hole is opened to discharge the water in the sealed water chamber, thereby causing the piston to descend and open the slag discharge port for slag discharge. The up and down movement of the piston is controlled by controlling the amount of water entering the separator, thereby controlling the slag discharge sealing action of the separator. Its drawback is that, in actual use, the slag discharge time of the butterfly separator is usually a momentary opening, so the slag discharge port is closed for a long time and opened for a short time. In contrast, the aforementioned patented technologies all achieve sealing by using pressurized water to enter the sealed water chamber to lift the piston. Therefore, during operation, the sealed water chamber must be kept under high pressure for a long time, which in turn requires a long-term supply of pressurized water.

[0004] For example, patent document 3, application number: CN201911235364.7, discloses a disc separator, which forms a heavy phase flow channel and a light phase flow channel through a disc cover. However, its structure is fixed, and the heavy phase material can only be separated by going up along the inner wall around the edge of the disc cover. In actual use, when separating two materials with similar densities, the boundary between the heavy material and the light material is close to the inner side of the disc cover, which makes it easy for some heavy material to enter the light phase flow channel, resulting in poor separation effect.

[0005] In view of the above, it is necessary to propose an outer ring slag discharge structure for a disc separator to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned technical problems by providing an outer ring slag discharge structure for a disc separator.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an outer ring slag discharge structure for a disc separator, comprising a rotating system and a disc assembly structure. The rotating system includes a rotating shell, a piston, and a sealing base plate. The rotating shell includes an upper shell and a lower shell, with the open ends of the upper and lower shells facing each other and fixedly connected to form the rotating shell. A slag discharge port is formed circumferentially at the connection end of the upper and lower shells. A piston is provided outside the slag discharge port, and a sealing base plate is provided below the piston. The sealing base plate is fixedly connected to the lower shell, and a stroke gap is formed between the sealing base plate and the lower shell for the piston to move up and down. A piston control part is provided between the lower side of the piston and the sealing base plate. The piston control part includes a throwing block and a lifting inclined surface. The lifting inclined surface is provided on the lower end face of the piston. The throwing block moves radially under the centrifugal force of rotation, and cooperates with the lifting inclined surface to move the piston upward and close the slag discharge port.

[0008] Furthermore, the piston includes a retaining ring, a control ring, and a guide ring. The guide ring is connected to the lower part of the retaining ring, and the control ring is arranged radially on the inner side of the retaining ring. The retaining ring is slidably sleeved on the outer periphery of the lower shell. The outer diameter of the upper shell is larger than the outer diameter of the lower shell, so that a limiting step is formed at the slag discharge port. The control ring divides the stroke clearance into an upper clearance and a lower clearance.

[0009] Furthermore, the piston control unit also includes a reset elastic element, and multiple reset elastic elements are provided in the upper gap, with the multiple reset elastic elements being circumferentially distributed.

[0010] Furthermore, the throwing block is disposed in the lower gap. The throwing block is a cylindrical mass block. Multiple throwing blocks are distributed circumferentially. Supporting ribs are provided on both sides of the throwing block along the radial direction. A guide groove for the throwing block to move is formed between the two supporting ribs. A central column connected to the lower shell is provided at the center of the sealing base plate. The control ring is sleeved on the central column.

[0011] Furthermore, the lifting ramp is located at the edge of the control ring, and the slope of the lifting ramp faces the central column. Sealing grooves are recessed on both sides of the lifting ramp. A sealing plate is provided at the end of the support rib away from the central column. The height of the sealing plate is higher than the height of the support rib, and the sealing plate cooperates with the sealing groove.

[0012] Furthermore, a sealed chamber is formed between the guide groove, sealing plate, lifting inclined surface, guide ring and throwing block. An injection hole is provided at the end of the sealed chamber away from the central column. Pressurized water is injected through the injection hole to push the throwing block towards the center of the sealing base plate. A return hole is also provided at the end of the guide groove near the central column.

[0013] Furthermore, the disc assembly structure includes a disc top cover, a disc bottom cover, and disc bodies. A plurality of disc bodies are disposed between the disc top cover and the disc bottom cover. The main body shape of the disc top cover, the disc bottom cover, and the disc bodies is conical. The area between the disc bottom cover and the lower housing is a feeding distribution area, the area between the disc top cover and the upper housing is a heavy material return area, and the area between the disc top cover and the disc bottom cover is a light material return area.

[0014] Furthermore, a light liquid centrifugal pump is installed on the upper part of the disc top cover, and a heavy liquid centrifugal pump is provided between the outside of the disc top cover and the upper housing; a light liquid outflow pipe is connected to the outlet end of the light liquid centrifugal pump, and a heavy liquid outflow pipe is connected to the outlet end of the heavy liquid centrifugal pump.

[0015] Furthermore, both the top cover and bottom cover of the disc are provided with a ring of through holes; the disc body includes a bottom disc, multiple middle discs, and a top disc arranged sequentially from bottom to top, with a ring of liquid riser holes distributed around the middle discs, and the side walls of the top disc and bottom discs having a hole-free structure or a ring of liquid riser holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, the centrifugal force generated by the rotating shaft when the rotating shaft rotates causes the surrounding blocks to move synchronously away from the center. The thrust of the blocks moving outward and its cooperation with the lifting inclined plane keep the piston moving upward and close the slag discharge port. This ensures that the slag discharge port remains closed during normal operation. Compared with the existing technology that requires constant pressure water to push the piston upward, this invention has the advantages of convenient control and low cost.

[0018] 2. A sealed chamber is formed on the outside of the throwing block with the guide groove, sealing plate, lifting inclined surface and guide ring. Water is injected into the sealed chamber through the injection hole, which pushes the throwing block toward the central column. At this time, the piston moves down under the push of the reset elastic element, so that the slag discharge port opens and forms instantaneous slag discharge.

[0019] 3. The disc top cover is designed to form a heavy material reflux zone and a light material reflux zone, which can realize the centrifugal separation of two materials with different densities. The through hole and the liquid riser hole form a liquid riser channel for the material to rise, which can facilitate the centrifugal separation of two mixtures with similar densities. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the piston closing and opening structure of the outer ring slag discharge structure of a disc separator according to this application;

[0021] Figure 2 This is an exploded view of the piston and sealing base plate structure in this application;

[0022] Figure 3 This is a schematic diagram of the longitudinal section of the outer ring slag discharge structure of a disc separator according to this application;

[0023] Figure 4 This is a schematic diagram of the structure of a single-layer disc in the disc body;

[0024] Figure 5 A schematic diagram of the medium flow direction when both the top and bottom discs have riser holes;

[0025] Figure 6 A schematic diagram of the medium flow direction when the top plate has a liquid riser hole;

[0026] Figure 7 A schematic diagram of the medium flow direction when the bottom disk has a liquid riser hole;

[0027] Figure 8 A schematic diagram of the medium flow direction when neither the top nor bottom plate has a riser hole;

[0028] In the diagram: 1. Rotating mechanism; 2. Disc assembly structure; 3. Piston; 4. Sealing base plate; 5. Upper shell; 6. Lower shell; 7. Slag discharge port; 8. Throwing block; 9. Lifting ramp; 10. Enclosure ring; 11. Control ring; 12. Guide ring; 13. Limiting step; 14. Upper clearance; 15. Lower clearance; 16. Reset elastic element; 17. Support rib; 18. Guide groove; 19. Central column; 20. Sealing groove; 21. 21. Sealing plate; 22. Sealing chamber; 23. Injection hole; 24. Return hole; 25. Disc top cover; 26. Disc bottom cover; 27. Feed distribution area; 28. Heavy material return area; 29. ​​Light material return area; 30. Light liquid centrifugal pump; 31. Heavy liquid centrifugal pump; 32. Light liquid outlet pipe; 33. Heavy liquid outlet pipe; 34. Through hole; 35. Bottom disc; 36. Middle disc; 37. Top disc; 38. Lifting hole. Detailed Implementation

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Example 1:

[0031] A disc separator outer ring slag discharge structure includes a rotating system 1 and a disc assembly structure 2. The rotating system 1 contains the disc assembly structure 2. When the rotating system 1 rotates, it synchronously drives the internal disc assembly structure 2 to rotate. Material is fed into the rotating system 1 along its axial direction, achieving centrifugal separation of the material through rotation. Figure 1 As shown, the rotating system 1 includes a rotating shell, a piston 3, and a sealing base plate 4. The rotating shell includes an upper shell 5 and a lower shell 6. The open ends of the upper shell 5 and the lower shell 6 are arranged opposite each other and fixedly connected to form the rotating shell. In actual use, the upper and lower shells 6 are connected by bolts to form a whole, and the whole is driven to rotate by the power shaft at the bottom. When it is necessary to disassemble for maintenance or cleaning, the upper and lower shells 6 can be separated from each other, so as to facilitate the removal of the internal disc assembly structure 2. When the upper and lower shells 6 are connected, a slag discharge port 7 is formed circumferentially on the connecting end face of the upper shell 5 and the lower shell 6. The piston 3 is provided on the outside of the slag discharge port 7. The piston 3 wraps around the lower shell 6 from the outside. Thus, by controlling the up and down movement of the piston 3, the slag discharge port 7 can be closed or opened. Unlike the prior art in which the piston 3 is built into the rotating system 1, the advantage of this structure is that the piston 3 is on the outside during the rotation of the rotating system 1, so it is not subjected to the pressure generated by the rotation of the internal material, thus making the lifting and lowering control of the piston 3 more flexible. A sealing base plate 4 is provided on the lower side of the piston 3. The sealing base plate 4 is fixedly connected to the lower housing 6. In actual use, the sealing base plate 4 is detachable for easy installation or removal of the piston 3. After the piston 3 is installed, the sealing base plate 4 is fixedly connected to the bottom of the lower housing 6 with bolts to achieve overall assembly and fixation. A stroke clearance is formed between the sealing base plate 4 and the lower housing 6 to allow the piston 3 to move up and down. The stroke clearance provides sufficient space for the piston 3 to move up and down. Figure 1 As shown in (a), piston 3 rises to the top and closes slag discharge port 7; Figure 1 As shown in (b), at this time, the piston 3 descends and exposes the slag discharge port 7. Under the action of the internal and external pressure difference, the impurities deposited on the inside of the slag discharge port 7 are squeezed out.

[0032] Specifically, the piston 3 includes a retaining ring 10, a control ring 11, and a guide ring 12 integrally formed into a ring structure. The guide ring 12 is connected to the lower part of the retaining ring 10, and the control ring 11 is arranged radially on the inner side of the retaining ring 10. The retaining ring 10 is slidably sleeved on the outer periphery of the lower housing 6, while the guide ring 12 is slidably sleeved on the outer periphery of the sealing base plate 4, thereby maintaining good concentricity of the piston 3 during the lifting and lowering process. The control ring 11 is used to control the lifting and lowering of the piston 3 as a whole ring.

[0033] The piston 3 is controlled by a piston 3 control unit, which is located between the lower side of the piston 3 and the sealing base plate 4. The piston 3 control unit includes a throwing block 8 and a lifting inclined surface 9. The lifting inclined surface 9 is located on the lower end face of the piston 3. The throwing block 8 moves radially under the centrifugal force of rotation, and cooperates with the lifting inclined surface 9 to move the piston 3 upward and close the slag discharge port 7. In actual use, the rotating system 1 rotates, so that the throwing block 8 obtains centrifugal force. The throwing block 8 moves away from the center and squeezes the lifting inclined surface 9, thereby causing the piston 3 to rise as a whole. Figure 1 The state shown in (a) is as follows. Figure 1 As shown, the outer diameter of the upper shell 5 is larger than that of the lower shell 6, forming a limiting step 13 at the slag discharge port 7. The limiting step 13 limits the upper edge of the retaining ring 10, so that when the piston 3 rises, its top is locked onto the limiting step 13. The centrifugal force generated when the rotating system 1 rotates can also keep the piston 3 pressed upward, further maintaining the sealing performance during centrifugal rotation. The control ring 11 divides the stroke clearance into an upper clearance 14 and a lower clearance 15.

[0034] Furthermore, the piston 3 control unit also includes a reset elastic element 16, of which multiple reset elastic elements 16 are provided within the upper gap 14, and the multiple reset elastic elements 16 are circumferentially distributed; the reset elastic element 16 is a pagoda spring; when the lower side swing block 8 loses its upward lifting pressure on the piston 3 body, the piston 3 body is pushed downward by the push of the reset elastic element 16, that is, as Figure 1 As shown in (b), the slag discharge port 7 is open at this time, which allows the accumulated impurities inside to be discharged.

[0035] Specifically, such as Figure 2 As shown, the throwing block 8 is disposed within the lower gap 15. The throwing block 8 is a cylindrical mass block, and multiple throwing blocks 8 are distributed circumferentially. Supporting ribs 17 are provided radially on both sides of the throwing block 8, and guide grooves 18 are formed between the two supporting ribs 17 to allow the throwing block 8 to move. Each guide groove 18 is composed of two parallel supporting ribs 17. That is, when the rotating system 1 drives the rotation, the throwing block 8 rolls and moves away from the center end in the guide groove 18. A central column 19 connected to the lower housing 6 is provided at the center of the sealing base plate 4. The control ring 11 is sleeved on the central column 19, and the central column 19 also guides the movement of the piston 3. The lifting inclined surface 9 is disposed on the edge of the control ring 11, and its outer surface is attached to the inner wall of the enclosure ring 10, and the slope of the lifting inclined surface 9 faces the central column 19.

[0036] The lifting inclined surface 9 has sealing grooves 20 recessed on both sides facing upwards. The supporting rib 17 has a sealing plate 21 at its end furthest from the central column 19. The sealing plate 21 is higher than the supporting rib 17, and it engages with the sealing grooves 20. Figure 2As shown, the sealing plate 21 is inserted into the sealing groove 20 at a height higher than the supporting rib 17, so that the sealing plate 21 can always be in contact with both sides of the lifting slope 9. In actual use, the sealing plate 21 is inserted into the sealing groove 20, so that the sealing plate 21 is in contact with both sides of the lifting slope 9, so that the guide groove 18, the sealing plate 21, the lifting slope 9, the guide ring 12 and the throwing block 8 form a sealed chamber 22. It can be understood that during the rotation centrifugation process, the upper side of the throwing block 8 is in contact with the lifting slope 9, the lower side is in contact with the bottom surface of the guide groove 18, and both ends are in contact with the sealing plates 21 on both sides. The other end of the guide ring 12 is connected to the edge of the sealing base plate 4 in a liftable and movable form of sealing connection, so that the sealed chamber 22 can form a seal when rotating centrifugation. Furthermore, the sealed chamber 22 is provided with an injection hole 23 at the end away from the central column 19. Pressurized water is injected through the injection hole 23 to push the throwing block 8 towards the center of the sealing base plate 4. The guide groove 18 is also provided with a return hole 24 at the end near the central column 19. The injection hole 23 is used to inject liquid into the sealed chamber 22 to push the throwing block 8 and make it move towards the center, thereby causing the piston 3 to lose the support of the lifting force. In actual slag discharge control, pressurized water is injected simultaneously into multiple sealed chambers 2 around the perimeter through the injection holes 23. Within 2, the throwing block 8 can be pushed simultaneously. At this time, the piston 3 moves downward under the push of the reset elastic element 16 to discharge slag. Since the slag discharge process is short, after the pressurized water pushes the throwing block 8 in an instant, the water will pass over the throwing block 8 and flow out through the return hole 24 at the other end. Even if the water is not completely discharged, a small portion of the remaining water is retained on the side of the throwing block 8 near the center. During the centrifugal rotation process, it can play a role in improving the sealing performance around the throwing block 8, so that when the pressurized water enters next time slag is discharged, it is easier to push the throwing block 8 to move.

[0037] Example 2:

[0038] like Figure 3 As shown, the disc assembly structure 2 includes a disc top cover 25, a disc bottom cover 26, and disc bodies. A plurality of disc bodies are disposed between the disc top cover 25 and the disc bottom cover 26. The main body shape of the disc top cover 25, the disc bottom cover 26, and the disc bodies is conical. The area between the disc bottom cover 26 and the lower housing 6 is a feeding distribution area 27. The area between the disc top cover 25 and the upper housing 5 is a heavy material return area 28. The area between the disc top cover 25 and the disc bottom cover 26 is a light material return area 29. A light liquid centrifugal pump 30 is installed on the upper part of the disc top cover 25. A heavy liquid centrifugal pump 31 is disposed between the outside of the disc top cover 25 and the upper housing 5. The outlet end of the light liquid centrifugal pump 30 is connected to a light liquid outlet pipe 32, and the outlet end of the heavy liquid centrifugal pump 31 is connected to a heavy liquid outlet pipe 33.

[0039] During centrifugation, the light liquid is distributed between the discs and drawn upwards from the center into the light liquid centrifugal pump 30 for delivery. The heavy liquid is thrown out of the area outside the disc top cover 25 and moves upwards into the heavy material reflux zone 28 during centrifugation, where it is then drawn out by the heavy liquid centrifugal pump 31. In actual use, for mixtures of liquid-liquid-solid materials, especially when the densities of the two liquid raw materials are similar, the centrifugal boundary layer of the two liquid raw materials tends to be located inside the disc structure during centrifugation. Figure 3 As shown by the dotted line, at this point, the heavy liquid is easily mixed into the light liquid and sent out, resulting in poor separation of liquid materials.

[0040] Furthermore, such as Figure 3 , Figure 4 As shown, both the top cover 25 and the bottom cover 26 of the disc are provided with a ring of through holes 34; the disc body includes a bottom disc 35, multiple middle discs 36, and a top disc 37 arranged sequentially from bottom to top. A ring of liquid-raising holes 38 is distributed around the perimeter of each middle disc 36. The liquid-raising holes 38 are aligned vertically and communicate with the through holes 34 at both ends, thereby forming a liquid-raising channel in the longitudinal direction that facilitates the rise of heavy liquid inside the disc assembly structure 2. Figure 5 The virtual pipeline shown by the dashed line allows the heavy liquid to move directly upwards at the boundary between light and heavy materials during centrifugal separation, thus effectively avoiding mixing between light and heavy materials and improving the centrifugal separation effect.

[0041] To achieve the above effects, as one embodiment, such as Figure 5 As shown, the sidewalls of the top plate 37 and the bottom plate 35 are provided with a ring of liquid rising holes 38, so that the material can enter the lower through hole 34 or flow outward from the bottom cover 26 of the plate. In this embodiment, heavy material can directly pass through each plate body and finally enter the heavy material return area 28 and be sent out smoothly.

[0042] As another embodiment, such as Figure 6 In this embodiment, a ring of liquid riser holes 38 is provided for the top plate 37, while the bottom plate 35 has a hole-free structure, so that all liquid materials bypass the bottom cover of the plate and enter between each plate body. After passing through the liquid riser holes 38 between each plate body, they form a liquid riser channel and enter the heavy material return zone 28.

[0043] like Figure 7 As shown, the top plate 37 can also be configured as a non-perforated structure, while the lower plates are configured with liquid riser holes 38. In this case, the upper through hole 34 can be closed, allowing heavy materials to bypass the top plate 37 and enter the heavy material return zone 28.

[0044] like Figure 8As shown, in this embodiment, the sidewalls of the top disc 37 and the bottom disc 35 are both non-porous, thus blocking the through holes 34 on both sides, resulting in a closed-end liquid riser channel. Based on the above embodiment, it can be understood that this structure can alter the separation effect of light and heavy materials during centrifugation by changing the structure of the top disc 37 and / or the bottom disc 35. According to the known differences in material density, the combination of the disc bodies can be appropriately modified to achieve optimal separation.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A disc separator outer ring slag discharge structure, comprising a rotating system (1) and a disc assembly structure (2), wherein the rotating system (1) contains the disc assembly structure (2), characterized in that, The rotating system (1) includes a rotating shell, a piston (3), and a sealing base plate (4); the rotating shell includes an upper shell (5) and a lower shell (6), the open ends of the upper shell (5) and the lower shell (6) are arranged opposite to each other and fixedly connected to form the rotating shell, the connecting end of the upper shell (5) and the lower shell (6) forms a slag discharge port (7) in the circumferential direction, the piston (3) is provided on the outside of the slag discharge port (7), the sealing base plate (4) is provided on the lower side of the piston (3), and the sealing base plate (4) is connected to the lower shell. The bodies (6) are fixedly connected. A stroke gap is formed between the sealing base plate (4) and the lower housing (6) for the piston (3) to move up and down. A piston (3) control part is provided between the lower side of the piston (3) and the sealing base plate (4). The piston (3) control part includes a throwing block (8) and a lifting inclined surface (9). The lifting inclined surface (9) is set on the lower end face of the piston (3). The throwing block (8) moves radially under the centrifugal force of rotation and cooperates with the lifting inclined surface (9) to make the piston (3) move up to close the slag discharge port (7). The piston (3) includes a retaining ring (10), a control ring (11), and a guide ring (12). The guide ring (12) is connected to the lower part of the retaining ring (10). The control ring (11) is arranged radially on the inner side of the retaining ring (10). The retaining ring (10) is slidably sleeved on the outer periphery of the lower housing (6). The outer diameter of the upper housing (5) is larger than the outer diameter of the lower housing (6) so that a limiting step (13) is formed at the slag discharge port (7). The control ring (11) divides the stroke clearance into an upper clearance (14) and a lower clearance (15). The piston (3) control unit also includes a reset elastic element (16), and multiple reset elastic elements (16) are provided in the upper gap (14), and the multiple reset elastic elements (16) are distributed circumferentially; The throwing block (8) is set in the lower gap (15). The throwing block (8) is a cylindrical mass block. Multiple throwing blocks (8) are distributed circumferentially. Supporting ribs (17) are provided on both sides of the throwing block (8) along the radial direction. A guide groove (18) for the throwing block (8) to move is formed between the supporting ribs (17) on both sides. A central column (19) connected to the lower shell (6) is provided at the center of the sealing base plate (4). The control ring (11) is sleeved on the central column (19). The lifting ramp (9) is located at the edge of the control ring (11), and the slope of the lifting ramp (9) faces the central column (19). The two sides of the lifting ramp (9) are recessed with sealing grooves (20) on the upper side. The end of the supporting rib (17) away from the central column (19) is provided with a sealing plate (21). The height of the sealing plate (21) is higher than the height of the supporting rib (17). The sealing plate (21) cooperates with the sealing groove (20). The guide groove (18), sealing plate (21), lifting inclined surface (9), guide ring (12) and throwing block (8) form a sealed chamber (22). The sealed chamber (22) is provided with an injection hole (23) at the end away from the central column (19). Pressurized water is injected through the injection hole (23) to push the throwing block (8) towards the center of the sealing base plate (4). The guide groove (18) is also provided with a return hole (24) at the end near the central column (19).

2. The outer ring slag discharge structure of the disc separator according to claim 1, characterized in that, The disc assembly structure (2) includes a disc top cover (25), a disc bottom cover (26), and a disc body. A plurality of disc bodies are provided between the disc top cover (25) and the disc bottom cover (26). The main body shape of the disc top cover (25), the disc bottom cover (26), and the disc body is conical. The area between the disc bottom cover (26) and the lower shell (6) is the feeding distribution area (27). The area between the disc top cover (25) and the upper shell (5) is the heavy material return area (28). The area between the disc top cover (25) and the disc bottom cover (26) is the light material return area (29).

3. The outer ring slag discharge structure of the disc separator according to claim 2, characterized in that, A light liquid centrifugal pump (30) is installed on the upper part of the disc top cover (25), and a heavy liquid centrifugal pump (31) is provided between the outside of the disc top cover (25) and the upper shell (5); the outlet end of the light liquid centrifugal pump (30) is connected to a light liquid outflow pipe (32), and the outlet end of the heavy liquid centrifugal pump (31) is connected to a heavy liquid outflow pipe (33).

4. The outer ring slag discharge structure of a disc separator according to claim 2, characterized in that, The disc top cover (25) and disc bottom cover (26) are both provided with a ring of through holes (34); the disc body includes a bottom disc (35), a plurality of intermediate discs (36) and a top disc (37) arranged sequentially from bottom to top. The intermediate discs (36) are surrounded by a ring of liquid riser holes (38). The side walls of the top disc (37) and the bottom disc (35) are non-porous or are provided with a ring of liquid riser holes (38).

Images