Spiral scraper for scraper centrifuge

Abstract

The spiral scraper for the scraper centrifugal machine comprises a feeding cylinder (1) and a spiral blade (2), the feeding cylinder (1) is in a circular truncated cone shape and is hollow inside, the small-diameter end of the feeding cylinder (1) is closed, an annular baffle (11) is arranged on the periphery of the end portion of the feeding cylinder (1), a discharging port (12) is formed in the cylinder wall, close to the small-diameter end, of the feeding cylinder (1), and a feeding port (13) is formed in the large-diameter end of the feeding cylinder (1). The spiral blade (2) is arranged on the outer side wall of the feeding barrel (1) in a surrounding mode, and the tail end of the spiral blade (2) is fixedly connected with the baffle (11) through a connecting plate (21). A first wear-resistant ceramic layer (3) is arranged on the spiral blade (2), and a second wear-resistant ceramic layer (4) is arranged on the side face, close to the discharging port (12), of the connecting plate (21) and the side face, close to the discharging port (12), of the baffle (11). Abrasion and impact of materials to the spiral blade, the connecting plate and the baffle can be reduced, and the service life of the spiral scraper is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of scraper centrifuge equipment, in particular to a spiral scraper for a scraper centrifuge. Background Art

[0002] Salt lake brine is rich in minerals such as sodium, potassium, lithium and magnesium. The carnallite ore obtained after the salt lake brine is spread out and dried is the main raw material for producing potassium chloride. The processes for producing potassium fertilizer using carnallite ore mainly include direct flotation, reverse flotation and hot solution crystallization. In each potassium chloride production process, the potassium chloride slurry needs to use a scraper centrifuge to separate the potassium chloride material from the solution for solid-liquid separation.

[0003] like Figure 8 As shown, the scraper centrifuge 5 is a universal continuously working centrifuge. When the equipment is running, the spiral scraper 51 rotates rapidly, and the potassium chloride slurry enters the small diameter end of the feeding cone 52, and is evenly distributed between the spiral scraper 51 and the screen basket 54 through the discharge port by centrifugal action. The high centrifugal force from the centrifugal action causes the liquid in the slurry to pass through the screen basket 54 and be discharged from the discharge port 55. The solids in the slurry are retained on the screen basket 54, and are transmitted from the small diameter end of the screen basket 54 to the large diameter end by the inclination angle of the screen basket 54 and the differential speed of the spiral scraper 51, and are discharged from the discharge port 56.

[0004] The spiral scraper 51 is the main working part of the scraper centrifuge 5 and is also a wearing part. Its normal service life is about 3 to 5 months. The spiral scraper 51 is provided with a discharge port in the gap between adjacent spiral scraper blades 53. When the material enters the working area between the spiral scraper 51 and the screen basket 54 from the discharge port of the spiral scraper 51, due to the differential speed between the spiral scraper 51 and the screen basket 54, the material causes strong wear and impact on the area around the discharge port of the spiral scraper, resulting in cracking and penetration of the spiral scraper. Frequent maintenance and replacement of the spiral scraper affect normal production.

[0005] The utility model aims to solve the problem that the spiral scraper of the existing scraper centrifuge is easily worn and damaged by the impact of materials and has a short service life. Utility Model Content

[0006] In order to solve the above problems, the utility model provides a spiral scraper for a scraper centrifuge, including a feed barrel 1 and a spiral blade 2. The feed barrel 1 is truncated and hollow inside. The small diameter end of the feed barrel 1 is closed, and a circular baffle 11 is arranged on the outer periphery of the end. A discharge port 12 is arranged on the barrel wall of the feed barrel 1 near the small diameter end, and a feed port 13 is arranged on the large diameter end of the feed barrel 1. The spiral blade 2 is arranged around the outer wall of the feed barrel 1, and the end of the spiral blade 2 is fixedly connected to the baffle 11 through a connecting plate 21. A first wear-resistant ceramic layer 3 is arranged on the spiral blade 2, and a second wear-resistant ceramic layer 4 is arranged on the side of the connecting plate 21 and the baffle 11 near the discharge port 12.

[0007] The utility model arranges a first wear-resistant ceramic layer 3 on the spiral blade 2, and arranges a second wear-resistant ceramic layer 4 on the side surfaces of the connecting plate 21 and the baffle plate 11 close to the discharge port 12. When the spiral scraper rotates rapidly to disperse the potassium chloride slurry, the spiral blade 2 is protected by the first wear-resistant ceramic layer 3, and the connecting plate 21 and the baffle plate 11 are protected by the second wear-resistant ceramic layer 4, thereby reducing the wear and impact of the material on the spiral blade 2, the connecting plate 21 and the baffle plate 11, preventing the discharge port 12 of the spiral scraper from cracking and penetrating, and extending the service life of the spiral scraper.

[0008] Preferably, the thickness of the spiral blade 2 is 7 mm to 9 mm, and the thickness of the first wear-resistant ceramic layer 3 and the second wear-resistant ceramic layer 4 is 4 mm to 6 mm.

[0009] The thickness of the first wear-resistant ceramic layer 3 and the second wear-resistant ceramic layer 4 is set to 4 mm to 6 mm, which can prevent the first wear-resistant ceramic layer 3 and the second wear-resistant ceramic layer 4 from affecting the stirring and dispersion of the spiral scraper on the material and preventing the influence on the solid-liquid separation efficiency of the scraper centrifuge.

[0010] Preferably, the first wear-resistant ceramic layer 3 is fixed on the spiral blade 2 by gluing. The second wear-resistant ceramic layer 4 is fixed on the connecting plate 21 and the baffle plate 11 by gluing.

[0011] Preferably, the first wear-resistant ceramic layer 3 is formed by splicing a plurality of strip-shaped wear-resistant ceramic sheets 31 .

[0012] Preferably, the longer side of the strip-shaped wear-resistant ceramic sheet 31 is an inclined plane, and the two longer side surfaces of the strip-shaped wear-resistant ceramic sheet 31 are parallel to each other. The longer side surfaces of two adjacent strip-shaped wear-resistant ceramic sheets 31 of the first wear-resistant ceramic layer 3 are pressed together.

[0013] The first wear-resistant ceramic layer 3 is formed by splicing a plurality of strip-shaped wear-resistant ceramic sheets 31, wherein the longer side surfaces of the strip-shaped wear-resistant ceramic sheets 31 are inclined surfaces, and the longer side surfaces of two adjacent strip-shaped wear-resistant ceramic sheets 31 are pressed together so that the joints of the strip-shaped wear-resistant ceramic sheets 31 are not easily washed away by materials, thereby reducing the wear of the materials and extending the service life of the strip-shaped wear-resistant ceramic sheets 31.

[0014] Preferably, the second wear-resistant ceramic layer 4 includes a V-shaped wear-resistant ceramic sheet 41, which is formed by fixedly connecting a baffle wear-resistant ceramic sheet 42 and a connecting plate wear-resistant ceramic sheet 43, and the included angle between the baffle wear-resistant ceramic sheet 42 and the connecting plate wear-resistant ceramic sheet 43 is the same as the included angle between the connecting plate 21 and the baffle 11. The baffle wear-resistant ceramic sheet 42 is used to be fixed on the baffle 11, and the connecting plate wear-resistant ceramic sheet 43 is used to be fixed on the connecting plate 21.

[0015] As the spiral scraper rotates rapidly to stir and disperse the potassium chloride slurry, the angle between the connecting plate 21 and the baffle 11 at the end of the spiral blade 2 is the greatest impact force received by the potassium chloride slurry. A V-shaped wear-resistant ceramic sheet 41 is provided, which is formed by connecting a baffle wear-resistant ceramic sheet 42 and a connecting plate wear-resistant ceramic sheet 43. The baffle wear-resistant ceramic sheet 42 is fixed on the baffle 11, and the connecting plate wear-resistant ceramic sheet 43 is fixed on the connecting plate 21. The connecting plate 21 and the baffle 11 can be protected, the impact and wear of the material on the connecting plate 21 and the baffle 11 can be reduced, and the service life of the spiral scraper can be extended.

[0016] Preferably, it also includes a reinforcing wear-resistant ceramic sheet 44 , which is arc-shaped as a whole and is used to be fixed on the feed barrel 1 . The reinforcing wear-resistant ceramic sheet 44 is fixedly connected to one side of the V-shaped wear-resistant ceramic sheet 41 close to the feed barrel 1 .

[0017] The reinforced wear-resistant ceramic sheet 44 can protect the feed barrel 1, thereby reducing the wear and impact of the material on the feed barrel 1 and extending the service life of the spiral scraper. It can also protect the side of the V-shaped wear-resistant ceramic sheet 41, reducing the impact and wear of the material on the side of the V-shaped wear-resistant ceramic sheet 41 and extending the service life of the V-shaped wear-resistant ceramic sheet 41.

[0018] Preferably, the baffle wear-resistant ceramic sheet 42 is formed by connecting a first wear-resistant ceramic sheet 421 and a second wear-resistant ceramic sheet 424. One end of the first wear-resistant ceramic sheet 421 is fixedly connected to the connecting plate wear-resistant ceramic sheet 43, and the other end is provided with a first fixing plate 422. The first fixing plate 422 is provided with a connecting groove 423. A second fixing plate 425 is provided at the end of the second wear-resistant ceramic sheet 424. A connecting block 426 matching the connecting groove 423 is provided on the second fixing plate 425. The connecting block 426 is inserted into the connecting groove 423 to fix the first fixing plate 422 and the second fixing plate 425.

[0019] By arranging the baffle wear-resistant ceramic sheet 42 to be formed by connecting the first wear-resistant ceramic sheet 421 and the second wear-resistant ceramic sheet 424, the baffle wear-resistant ceramic sheet 42 can be prevented from breaking due to thermal expansion and contraction. The first wear-resistant ceramic sheet 421 and the second wear-resistant ceramic sheet 424 are connected through the connecting groove 423 on the first fixed plate 422 and the connecting block 426 of the second fixed plate 425, which can reduce the wear of the connection caused by the material and extend the service life.

[0020] Preferably, the inner side surface of the connection between the baffle wear-resistant ceramic sheet 42 and the connection plate wear-resistant ceramic sheet 43 is a curved surface.

[0021] As the spiral scraper rotates rapidly to stir and disperse the potassium chloride slurry, the angle between the connecting plate 21 and the baffle 11 at the end of the spiral blade 2 is subjected to the greatest impact from the potassium chloride slurry. The inner side surface of the connection between the baffle wear-resistant ceramic sheet 42 and the connecting plate wear-resistant ceramic sheet 43 is arranged as an arc surface, which can reduce the impact force of the material on the second wear-resistant ceramic layer 4 and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 . Schematic diagram of the overall structure of the spiral scraper for scraper centrifuge;

[0023] Figure 2 .Schematic diagram of the structure of V-shaped wear-resistant ceramic sheet and reinforced wear-resistant ceramic sheet;

[0024] Figure 3 .Schematic diagram of the structure of V-shaped wear-resistant ceramic sheet;

[0025] Figure 4 .Schematic diagram of the structure of the second wear-resistant ceramic sheet;

[0026] Figure 5 .Schematic diagram of the structure of the reinforced wear-resistant ceramic sheet;

[0027] Figure 6 .Schematic diagram of the structure of strip wear-resistant ceramic sheet;

[0028] Figure 7 . Schematic diagram of the structure of the strip wear-resistant ceramic sheet from another angle;

[0029] Figure 8 .Schematic diagram of the internal structure of a scraper centrifuge.

[0030] In the figure, 1. feed barrel, 11. baffle, 12. discharge port, 13. feed port, 2. spiral blade, 21. connecting plate, 3. first wear-resistant ceramic layer, 31. strip wear-resistant ceramic sheet, 4. second wear-resistant ceramic layer, 41. V-shaped wear-resistant ceramic sheet, 42. baffle wear-resistant ceramic sheet, 421. first wear-resistant ceramic sheet, 422. first fixed plate, 423. connecting groove, 424. second wear-resistant ceramic sheet, 425. second fixed plate, 426. connecting block, 43. connecting plate wear-resistant ceramic sheet, 44. reinforced wear-resistant ceramic sheet, 441. avoidance port, 5. scraper centrifuge, 51. spiral scraper, 52. feed cone barrel, 53. spiral scraper blade, 54. screen basket, 55. drain port, 56. discharge port. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, the spiral scraper for scraper centrifuge includes a feed barrel 1 and a spiral blade 2. The feed barrel 1 is truncated cone-shaped and hollow inside. The small diameter end of the feed barrel 1 is closed, and a circular baffle 11 is arranged on the outer periphery of the end. A discharge port 12 is arranged on the barrel wall of the feed barrel 1 near the small diameter end, and a feed port 13 is arranged on the large diameter end of the feed barrel 1.

[0033] A second wear-resistant ceramic layer 4 is provided on the side surfaces of the connecting plate 21 and the baffle plate 11 close to the discharge port 12 , and the second wear-resistant ceramic layer 4 is fixed to the connecting plate 21 and the baffle plate 11 by gluing.

[0034] The spiral blade 2 is disposed on the outer side wall of the feeding barrel 1 in a circumferential manner. The end of the spiral blade 2 is fixedly connected to the baffle 11 through a connecting plate 21. The thickness of the spiral blade 2 is 7 mm to 9 mm.

[0035] A first wear-resistant ceramic layer 3 is provided on the spiral blade 2. The first wear-resistant ceramic layer 3 is formed by splicing a plurality of strip-shaped wear-resistant ceramic sheets 31. The plurality of strip-shaped wear-resistant ceramic sheets 31 are fixed on the spiral blade 2 by gluing.

[0036] The spiral blade 2 is protected by the first wear-resistant ceramic layer 3, and the connecting plate 21 and the baffle 11 are protected by the second wear-resistant ceramic layer 4, thereby reducing the wear and impact of the spiral blade 2, the connecting plate 21 and the baffle 11 by the material, preventing the discharge port 12 of the spiral scraper from cracking and penetration, and extending the service life of the spiral scraper.

[0037] The thickness of the first wear-resistant ceramic layer 3 and the second wear-resistant ceramic layer 4 is 4 mm to 6 mm, which can prevent the first wear-resistant ceramic layer 3 and the second wear-resistant ceramic layer 4 from affecting the stirring and dispersion of the spiral scraper on the material, and prevent affecting the solid-liquid separation efficiency of the scraper centrifuge.

[0038] like Figure 2 and Figure 3 As shown, the second wear-resistant ceramic layer 4 includes a V-shaped wear-resistant ceramic sheet 41, which is formed by fixedly connecting a baffle wear-resistant ceramic sheet 42 and a connecting plate wear-resistant ceramic sheet 43. The angle between the baffle wear-resistant ceramic sheet 42 and the connecting plate wear-resistant ceramic sheet 43 is the same as the angle between the connecting plate 21 and the baffle 11.

[0039] The baffle wear-resistant ceramic sheet 42 is fixed to the baffle 11 by gluing, and the connecting plate wear-resistant ceramic sheet 43 is fixed to the connecting plate 21 by gluing.

[0040] As the spiral scraper rotates rapidly to stir and disperse the potassium chloride slurry, the angle between the connecting plate 21 and the baffle 11 at the end of the spiral blade 2 is the greatest impact force received by the potassium chloride slurry. A V-shaped wear-resistant ceramic sheet 41 is provided, which is formed by connecting a baffle wear-resistant ceramic sheet 42 and a connecting plate wear-resistant ceramic sheet 43. The baffle wear-resistant ceramic sheet 42 is fixed on the baffle 11, and the connecting plate wear-resistant ceramic sheet 43 is fixed on the connecting plate 21. The connecting plate 21 and the baffle 11 can be protected, the impact and wear of the material on the connecting plate 21 and the baffle 11 can be reduced, and the service life of the spiral scraper can be extended.

[0041] The inner side surface of the angle of the V-shaped wear-resistant ceramic sheet 41 , that is, the inner side surface of the connection between the baffle wear-resistant ceramic sheet 42 and the connecting plate wear-resistant ceramic sheet 43 , is a curved surface.

[0042] The wall thickness of the V-shaped wear-resistant ceramic sheet 41 at the included angle close to the feeding barrel 1 is greater than the wall thickness of the side away from the feeding barrel 1 .

[0043] The inner side surface of the connection between the baffle wear-resistant ceramic sheet 42 and the connecting plate wear-resistant ceramic sheet 43 is set as a curved surface, which can reduce the impact force of the material on the second wear-resistant ceramic layer 4 and extend the service life.

[0044] It also includes a reinforced wear-resistant ceramic sheet 44, which is arc-shaped as a whole and is used to be fixed on the feed barrel 1. The reinforced wear-resistant ceramic sheet 44 is fixedly connected to the side of the V-shaped wear-resistant ceramic sheet 41 close to the feed barrel 1, and the position of the reinforced wear-resistant ceramic sheet 44 corresponding to the discharge port 12 is provided with an avoidance port 441, refer to Figure 5 .

[0045] The reinforced wear-resistant ceramic sheet 44 can protect the feed barrel 1, thereby reducing the wear and impact of the material on the feed barrel 1 and extending the service life of the spiral scraper. It can also protect the side of the V-shaped wear-resistant ceramic sheet 41, reducing the impact and wear of the material on the side of the V-shaped wear-resistant ceramic sheet 41 and extending the service life of the V-shaped wear-resistant ceramic sheet 41.

[0046] like Figure 3 and Figure 4As shown, the baffle wear-resistant ceramic sheet 42 is formed by connecting a first wear-resistant ceramic sheet 421 and a second wear-resistant ceramic sheet 424. One end of the first wear-resistant ceramic sheet 421 is fixedly connected to the connecting plate wear-resistant ceramic sheet 43, and the other end is provided with a first fixing plate 422, and the first fixing plate 422 is provided with a connecting groove 423.

[0047] The first wear-resistant ceramic sheet 421 and the second wear-resistant ceramic sheet 424 have the same thickness.

[0048] A second fixing plate 425 is disposed at the end of the second wear-resistant ceramic sheet 424 . A connecting block 426 matching the connecting groove 423 is disposed on the second fixing plate 425 . The connecting block 426 is inserted into the connecting groove 423 to fix the first fixing plate 422 and the second fixing plate 425 .

[0049] The second fixing plate 425 and the first fixing plate 422 have the same thickness, which is half the thickness of the first wear-resistant ceramic plate 421 .

[0050] The second fixing plate 425 is provided with a connecting block 426 that matches the connecting groove 423, wherein the matching means that the shape and size of the connecting block 426 are the same as the shape and size of the connecting groove 423, so that the connecting block 426 can be inserted into the connecting groove 423, and the first fixing plate 422 and the second fixing plate 425 are fixedly connected through the cooperation of the connecting block 426 and the connecting groove 423.

[0051] The baffle wear-resistant ceramic sheet 42 is formed by connecting a first wear-resistant ceramic sheet 421 and a second wear-resistant ceramic sheet 424, which can prevent the baffle wear-resistant ceramic sheet 42 from breaking due to thermal expansion and contraction. The first wear-resistant ceramic sheet 421 and the second wear-resistant ceramic sheet 424 are connected through a connecting block 426 on the first fixed plate 422 and a connecting groove 423 of the second fixed plate 425, which can reduce the wear of the connection caused by the material and extend the service life.

[0052] like Figure 6 and Figure 7 As shown, the longer side surface of the strip-shaped wear-resistant ceramic sheet 31 is an inclined plane, and the two longer side surfaces of the strip-shaped wear-resistant ceramic sheet 31 are parallel to each other.

[0053] The longer side surfaces of two adjacent strip-shaped wear-resistant ceramic sheets 31 of the first wear-resistant ceramic layer 3 are pressed together.

[0054] The first wear-resistant ceramic layer 3 is formed by splicing a plurality of strip-shaped wear-resistant ceramic sheets 31, wherein the longer side surfaces of the strip-shaped wear-resistant ceramic sheets 31 are inclined surfaces, and the longer side surfaces of two adjacent strip-shaped wear-resistant ceramic sheets 31 are pressed together so that the joints of the strip-shaped wear-resistant ceramic sheets 31 are not easily washed away by materials, thereby reducing the wear of the materials and extending the service life of the strip-shaped wear-resistant ceramic sheets 31.

[0055] The utility model arranges a first wear-resistant ceramic layer 3 on the spiral blade 2, and arranges a second wear-resistant ceramic layer 4 on the side surfaces of the connecting plate 21 and the baffle plate 11 close to the discharge port 12. When the spiral scraper rotates rapidly to disperse the potassium chloride slurry, the spiral blade 2 is protected by the first wear-resistant ceramic layer 3, and the connecting plate 21 and the baffle plate 11 are protected by the second wear-resistant ceramic layer 4, thereby reducing the wear and impact of the material on the spiral blade 2, the connecting plate 21 and the baffle plate 11, preventing the discharge port 12 of the spiral scraper from cracking and penetrating, and extending the service life of the spiral scraper.

[0056] The first wear-resistant ceramic layer 3 is formed by splicing a plurality of strip-shaped wear-resistant ceramic sheets 31, wherein the longer side surfaces of the strip-shaped wear-resistant ceramic sheets 31 are inclined surfaces, and the longer side surfaces of two adjacent strip-shaped wear-resistant ceramic sheets 31 are pressed together so that the joints of the strip-shaped wear-resistant ceramic sheets 31 are not easily washed away by materials, thereby reducing the wear of the materials and extending the service life of the strip-shaped wear-resistant ceramic sheets 31.

[0057] The reinforced wear-resistant ceramic sheet 44 can protect the feed barrel 1, thereby reducing the wear and impact of the material on the feed barrel 1 and extending the service life of the spiral scraper. The inner side surface of the connection between the baffle wear-resistant ceramic sheet 42 and the connecting plate wear-resistant ceramic sheet 43 is set as an arc surface, which can reduce the impact force of the material on the second wear-resistant ceramic layer 4 and extend the service life.

[0058] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A spiral scraper for a scraper centrifuge, characterized in that: It comprises a feeding barrel (1) and a spiral blade (2), The feed barrel (1) is in the shape of a truncated cone and is hollow inside. The small diameter end of the feed barrel (1) is closed, and a circular baffle (11) is arranged on the outer periphery of the end. A discharge port (12) is arranged on the barrel wall of the feed barrel (1) near the small diameter end, and a feed port (13) is arranged on the large diameter end of the feed barrel (1); The spiral blade (2) is disposed on the outer side wall of the feeding barrel (1) in a circumferential manner, and the end of the spiral blade (2) is fixedly connected to the baffle (11) via a connecting plate (21); The spiral blade (2) is provided with a first wear-resistant ceramic layer (3); A second wear-resistant ceramic layer (4) is provided on the side surfaces of the connecting plate (21) and the baffle plate (11) close to the discharge port (12).

2. The spiral scraper for scraper centrifuge according to claim 1, characterized in that: The thickness of the spiral blade (2) is 7 mm to 9 mm; The thickness of the first wear-resistant ceramic layer (3) and the second wear-resistant ceramic layer (4) is 4 mm to 6 mm.

3. The spiral scraper for scraper centrifuge according to claim 2, characterized in that: The first wear-resistant ceramic layer (3) is fixed on the spiral blade (2) by gluing; The second wear-resistant ceramic layer (4) is fixed to the connecting plate (21) and the baffle plate (11) by gluing.

4. The spiral scraper for scraper centrifuge according to claim 3, characterized in that: The first wear-resistant ceramic layer (3) is formed by splicing a plurality of strip-shaped wear-resistant ceramic sheets (31).

5. The spiral scraper for scraper centrifuge according to claim 4, characterized in that: The longer side surface of the strip-shaped wear-resistant ceramic sheet (31) is an inclined plane. The two longer side surfaces of the strip-shaped wear-resistant ceramic sheet (31) are parallel to each other; The longer side surfaces of two adjacent strip-shaped wear-resistant ceramic sheets (31) of the first wear-resistant ceramic layer (3) are pressed together.

6. The spiral scraper for scraper centrifuge according to claim 5, characterized in that: The second wear-resistant ceramic layer (4) comprises a V-shaped wear-resistant ceramic sheet (41), The V-shaped wear-resistant ceramic sheet (41) is formed by fixedly connecting a baffle wear-resistant ceramic sheet (42) and a connecting plate wear-resistant ceramic sheet (43); the included angle between the baffle wear-resistant ceramic sheet (42) and the connecting plate wear-resistant ceramic sheet (43) is the same as the included angle between the connecting plate (21) and the baffle (11); The baffle wear-resistant ceramic sheet (42) is used to be fixed on the baffle (11); The connecting plate wear-resistant ceramic sheet (43) is used for being fixed on the connecting plate (21).

7. The spiral scraper for scraper centrifuge according to claim 6, characterized in that: It also includes a reinforced wear-resistant ceramic sheet (44), The reinforced wear-resistant ceramic sheet (44) is arc-shaped as a whole and is used to be fixed on the feed barrel (1). The reinforced wear-resistant ceramic sheet (44) is fixedly connected to a side of the V-shaped wear-resistant ceramic sheet (41) close to the feed barrel (1).

8. The spiral scraper for scraper centrifuge according to claim 7, characterized in that: The baffle wear-resistant ceramic sheet (42) is formed by connecting a first wear-resistant ceramic sheet (421) and a second wear-resistant ceramic sheet (424). One end of the first wear-resistant ceramic sheet (421) is fixedly connected to the connecting plate wear-resistant ceramic sheet (43), and the other end is provided with a first fixing plate (422), and the first fixing plate (422) is provided with a connecting groove (423). A second fixing plate (425) is provided at the end of the second wear-resistant ceramic sheet (424), and a connecting block (426) matching the connecting groove (423) is provided on the second fixing plate (425); The connecting block (426) is inserted into the connecting groove (423) to fix the first fixing plate (422) and the second fixing plate (425).

9. The spiral scraper for scraper centrifuge according to claim 8, characterized in that: The inner side surface of the connection between the baffle wear-resistant ceramic sheet (42) and the connection plate wear-resistant ceramic sheet (43) is a curved surface.

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