Centrifuge screw assembly and centrifuge

Abstract

This invention belongs to the field of horizontal spiral centrifuges, specifically relating to a centrifuge spiral assembly and the centrifuge thereof, including a spiral core tube, spiral blades arranged spirally on the outer wall of the spiral core tube, and a BD plate. The front end of the spiral core tube has a conical tube, and the BD plate is disposed on the outer wall of the conical tube. The radial width of the BD plate gradually decreases from its first end to its second end, causing the distance between the outer wall of the BD plate and the inner wall of the drum to gradually increase from the first end to the second end. The beneficial effect of this invention is that, due to the above-mentioned structure of the BD plate, the distance between the outer wall of the BD plate and the inner wall of the drum gradually increases from the first end to the second end. This allows the solid particles at the first end to be more densely packed, thereby reducing the water content of the solid phase, and also reduces the density of solid particles at the second end, thus avoiding excessive wear at the second end.

Description

Technical Field

[0001] This invention belongs to the field of horizontal screw centrifuges, specifically relating to a centrifuge screw assembly and the centrifuge thereof. Background Technology

[0002] The spiral assembly of a horizontal spiral centrifuge generally includes a spiral core tube, a BD plate, and spiral blades. The main body of the spiral core tube is a tubular structure with a uniform outer diameter. Its front end, that is, the solid phase outlet end, has a conical tube. The outer diameter of the rear end of the conical tube is the same as the outer diameter of the main body of the spiral core tube. The BD plate is welded to the outer wall of the conical tube, which divides the cavity between the outer wall of the spiral core tube and the inner wall of the drum into a drying zone and a settling zone. For details, please refer to patent CN201565362U.

[0003] The problem with existing technology is that the BD plate is usually perpendicular to the axis of the spiral core tube, while the spiral blades are arranged spirally along the outer wall of the spiral core tube. This results in uneven spacing between the BD plate and the nearest spiral blade on the settling zone side. Specifically, the spacing gradually increases from one end of the BD plate to the other. The end with the larger spacing between the BD plate and the spiral blades is defined as the first end, and the other end as the second end. When the spacing between the outer wall of the BD plate and the inner wall of the drum is uniform, the larger the spacing between the BD plate and the spiral blades, the looser the solid particles, allowing moisture to easily pass through the BD plate and leading to an increase in the solid phase moisture content. Conversely, the smaller the spacing between the BD plate and the spiral blades, the denser the solid particles, resulting in greater wear on the BD plate. Furthermore, to ensure a continuous and dense flow of solid particles between the outer wall of the BD plate and the inner wall of the drum (making it difficult for moisture to pass through), the applicant proposes to thicken the BD plate axially. However, thickening the BD plate would affect the imbalance of the conical tube, leading to a reduction in the service life of the conical tube. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a centrifuge spiral assembly and a centrifuge technical solution thereof.

[0005] A centrifuge spiral assembly includes a spiral core tube, spiral blades arranged spirally on the outer wall of the spiral core tube, and a BD plate. The front end of the spiral core tube has a conical tube, and the BD plate is disposed on the outer wall of the conical tube. The radial width of the BD plate gradually decreases from its first end to its second end, so that the distance between the outer wall of the BD plate and the inner wall of the drum gradually increases from the first end to the second end.

[0006] Furthermore, the inner wall of the BD plate is a circular arc surface with a uniform curvature.

[0007] Furthermore, in the radial cross-section of the BD plate, its outer wall presents as an equidistant spiral.

[0008] Furthermore, a first sealing end is provided at the first end of the BD plate, and a second sealing end is provided at the second end of the BD plate. The first sealing end and the second sealing end are respectively connected to the side of the spiral blade.

[0009] Furthermore, the first sealing end protrudes from the front side of the BD plate body.

[0010] Furthermore, the second sealing end protrudes from the rear side of the BD plate body.

[0011] Furthermore, the outer diameter of the rear end of the conical tube is larger than the outer diameter of the spiral core tube body, causing the rear end of the conical tube to protrude from the outer wall of the spiral core tube body, forming a boss structure.

[0012] Furthermore, the BD plate is disposed on the outer wall of the boss structure.

[0013] Furthermore, the outer diameter of the outer wall of the boss structure is uniform.

[0014] The present invention also provides a centrifuge comprising the centrifuge spiral assembly as described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) Because the BD plate adopts the above structure, the distance between the outer wall of the BD plate and the inner wall of the drum gradually increases from the first end to the second end. This makes the solid particles at the first end more dense, thereby reducing the solid phase water content. At the same time, it can also reduce the density of solid particles at the second end, thereby avoiding excessive wear at the second end.

[0017] 2) The present invention provides a boss structure protruding from the outer wall of the spiral core tube body. In this way, the structure of the conical tube is strengthened, the impact of the increased thickness of the BD plate on the unbalance of the conical tube is reduced, and the boss structure reduces the distance between the conical tube and the inner wall of the drum, which enables secondary extrusion of the solid phase and further reduces the water content of the solid phase. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of Example 1;

[0019] Figure 2 This is the second schematic diagram of the structure of Example 1;

[0020] Figure 3 This is a schematic diagram of the internal structure of Example 1;

[0021] Figure 4 This is a schematic diagram of the main view structure of the BD board in Example 1;

[0022] Figure 5This is a schematic diagram of the left-side structure of the BD plate in Example 1;

[0023] In the figure: BD plate 1, first end 100, second end 101, inner wall of BD plate 102, outer wall of BD plate 103, first sealing end 104, second sealing end 105, spiral core tube 2, spiral blade 3, conical tube 4. Implementation

[0024] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] The invention will now be further described with reference to the accompanying drawings. Example 1

[0026] Please see Figures 1-5 A centrifuge spiral assembly includes a spiral core tube 2, spiral blades 3 arranged spirally on the outer wall of the spiral core tube 2, and a BD plate 1. The front end of the spiral core tube 2 has a conical tube 4, and the BD plate 1 is disposed on the outer wall of the conical tube 4. The BD plate 1 divides the cavity between the outer wall of the spiral core tube 2 and the inner wall of the drum into a drying zone and a settling zone. Figure 1 The front end of the spiral core tube 2 is the location of the drying zone. The BD plate 1 is an arc-shaped strip structure, and its radial width gradually decreases from its first end 100 to its second end 101, so that the distance between the outer wall 103 of the BD plate and the inner wall of the drum gradually increases from the first end 100 to the second end 101.

[0027] Depend on Figure 1 and Figure 3 It can be seen that the distance between the first end 100 of BD plate 1 and the nearest spiral blade 3 on the settlement zone side is relatively large, while the distance between the second end 101 of BD plate 1 and the nearest spiral blade 3 on the settlement zone side is relatively small. Figure 5 As shown, Figure 5 The dashed outlines of the inner and outer sides roughly indicate the position of the drum. It can be seen that the distance between the first end 100 and the inner wall of the drum is small, while the distance between the second end 101 and the inner wall of the drum is large.

[0028] It is understood that in the above technical solution, since the BD plate 1 adopts the above structure, the distance between the outer wall 103 of the BD plate and the inner wall of the drum gradually increases from the first end 100 to the second end 101. This makes the solid particles at the first end 100 more dense, thereby reducing the solid phase water content. At the same time, it can also reduce the density of solid particles at the second end 101, thereby avoiding excessive wear at the second end 101. In short, the solid particles around the BD plate 1 of the present invention are more uniform, which can reduce the solid phase water content and reduce wear.

[0029] Continue reading Figure 4 The inner wall 102 of the BD plate 1 is a circular arc surface with uniform curvature, that is, the curvature of each point on the inner wall 102 of the BD plate is the same. The outer wall 103 of the BD plate is an equidistant spiral. Since it is an equidistant spiral, the width of the BD plate 1 in the radial direction gradually decreases from one end to the other.

[0030] Continue reading Figure 5 A first sealing end 104 is provided at the first end 100 of the BD plate 1, and a second sealing end 105 is provided at the second end 101 of the BD plate 1. The first sealing end 104 and the second sealing end 105 are respectively used to connect to the side of the spiral blade 3. The first sealing end 104 protrudes from the front side of the BD plate body, and the second sealing end 105 protrudes from the rear side of the BD plate body.

[0031] Continue reading Figure 3 The outer diameter of the rear end of the conical tube 4 is larger than the outer diameter of the spiral core tube body, causing the rear end of the conical tube 4 to protrude from the outer wall of the spiral core tube body, forming a boss structure 400. The outer diameter of the outer wall of the boss structure 400 is uniform, and the BD plate is set on the outer wall of the boss structure 400.

[0032] It is understood that in the above technical solution, this embodiment sets a boss structure 400 protruding from the outer wall of the spiral core tube body. In this way, the structure of the conical tube 4 is strengthened, the impact of the thickness of the BD plate 1 on the unbalance of the conical tube 4 is reduced, and the setting of the boss structure 400 makes the distance between the conical tube 4 and the inner wall of the drum smaller, which can perform secondary extrusion on the solid phase and further reduce the water content of the solid phase. Example 2

[0033] A centrifuge includes a centrifuge spiral assembly as described in Example 1, and the other structures of the centrifuge are based on existing technology.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifuge spiral assembly, comprising a spiral core tube (2), spiral blades (3) arranged spirally on the outer wall of the spiral core tube (2), and a BD plate (1), wherein the front end of the spiral core tube (2) has a conical tube (4), and the BD plate (1) is disposed on the outer wall of the conical tube (4), characterized in that, The BD plate has a C-shaped structure. The width of the BD plate (1) in the radial direction gradually decreases from its first end (100) to its second end (101), so that the distance between the outer wall (103) of the BD plate and the inner wall of the drum gradually increases from the first end (100) to the second end (101). The first end (100) of the BD plate (1) is provided with a first sealing end (104), and the second end (101) of the BD plate (1) is provided with a second sealing end (105). The first sealing end (104) and the second sealing end (105) are respectively connected to the side of the spiral blade (3). The outer diameter of the rear end of the conical tube (4) is larger than the outer diameter of the spiral core tube body, so that the rear end of the conical tube (4) protrudes from the outer wall of the spiral core tube body, forming a boss structure (400), and the BD plate (1) is set on the outer wall of the boss structure (400).

2. A centrifuge screw assembly according to claim 1, characterized in that, The inner wall (102) of the BD plate (1) is a circular arc surface with consistent curvature.

3. A centrifuge screw assembly according to claim 1, characterized in that, On the radial section of the BD plate (1), its outer wall (103) is an equidistant spiral.

4. A centrifuge screw assembly according to claim 1, characterized in that, The first sealing end (104) protrudes from the front side of the BD plate body.

5. A centrifuge screw assembly according to claim 1, characterized in that, The second sealing end (105) protrudes from the rear side of the BD plate body.

6. A centrifuge screw assembly according to claim 1, characterized in that, The outer diameter of the outer wall of the boss structure (400) is uniform.

7. A centrifuge, characterized in that, Includes the centrifuge spiral assembly as described in any one of claims 1-6.

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