Slurry screening rotor and slurry screening equipment

Abstract

The present invention relates to a slurry screening rotor and slurry screening equipment, which are used to rotate around their own axis under the drive of a pressure screen. The slurry screening rotor includes: a cylinder and blades. The blades include a head, a tail and a screening part, and the outline of the head is an arc. The width W1 of the screening part tends to decrease along at least a part of the direction from the head to the tail. In this slurry screening rotor, the head of the blade has an arc-shaped outline, so that a smooth transition pulse is generated during the stirring process of the non-wood fiber slurry, the fluidity of the non-wood fiber slurry is improved, and the non-wood fiber is treated more gently, effectively reducing the rotational resistance, thereby reducing the energy consumption of the pressure screen; at the same time, it is beneficial to increase the service life of the blades and improve the overall reliability of the slurry screening rotor. In addition, the blades with reduced width from the head to the tail effectively increase the suction area of ​​the slurry, which is beneficial to increase the slurry concentration, thereby increasing the production capacity of the non-wood fiber slurry screening equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of pulping and screening equipment, in particular to a pulp screening rotor and pulp screening equipment. Background Art

[0002] With the development of modern industrial technology, wood pulp pressure screening technology has emerged. This highly mature screening technology is widely used in various pulp screening systems. It is developed based on the fiber properties of wood pulp, which primarily includes softwood pulp and hardwood pulp. However, non-wood straw fibers differ significantly from wood pulp fibers. For example, the average length of non-wood fibers is 1 mm, while the average length of reed pulp fibers is 0.46 mm. Non-wood pulp also has a thin-walled cell content of 30-40%. The average fiber length of softwood pulp is 3.5-4 mm, with the longest fibers being approximately 6-7 mm. The thin-walled cell content is 5%. Hardwood pulp fibers are one-third the length of softwood pulp and have a thin-walled cell content of 20%. These fundamental characteristics dictate different requirements for equipment performance.

[0003] Traditionally, the screening of non-wood fibers still relies on conventional wood pulp pressure screening technology and equipment. However, current screening equipment is not specifically designed for non-wood fibers, resulting in weak screening performance, poor screening results, and low production capacity. Summary of the Invention

[0004] Based on this, it is necessary to provide a pulp screening rotor and pulp screening equipment that can effectively improve the screening efficiency of non-wood fibers and thus increase production capacity.

[0005] A slurry screening rotor is used to rotate around its own axis under the drive of a pressure screen, comprising: a cylinder, the cylinder is provided with a mounting portion and a screening portion, the mounting portion is connected to the screening portion, the mounting portion is used to connect to the pressure screen, and the screening portion is used to stir the slurry; blades, the blades are arranged on the screening portion, wherein the blades include a head, a tail and a transition portion, the head and the tail are respectively arranged on opposite sides of the transition portion, and the contour of the head is arc-shaped, and the width W1 of the transition portion tends to decrease along at least a portion of the direction from the head to the tail.

[0006] During installation, the slurry screening rotor is mounted on a pressure screen. During use, the slurry to be screened is first fed into the pressure screen through the screen's feed port. The pressure screen is then activated, causing the screen to drive the slurry screening rotor to rotate, with the blades driving the slurry to rotate and agitate. The screen frame then screens the material, allowing qualified non-wood fibers to pass through the gaps in the frame and be discharged, while coarse fibers in the slurry gradually sink between the rotor and the frame. Finally, the coarse fibers are flushed out. The blades of this slurry screening rotor have an arc-shaped head, which creates a smooth transition pulse during the agitation of the non-wood fiber slurry, improving the fluidity of the non-wood fiber slurry and providing gentler treatment of the non-wood fibers. This effectively reduces rotational resistance, thereby reducing the energy consumption of the pressure screen. This also helps extend the blade's service life and enhances the overall reliability of the slurry screening rotor. Furthermore, the blades, which decrease in width from head to tail, effectively increase the slurry suction area, facilitating increased slurry concentration and, consequently, the production capacity of the non-wood fiber slurry screening equipment.

[0007] In one embodiment, the contour of the tail is linear, and the contour diameter φ of the head is greater than the contour length d of the tail.

[0008] In one embodiment, along the direction from the head to the tail, at least a portion of the thickness D1 of the blade shows a decreasing trend.

[0009] In one embodiment, along the direction from the head to the tail, the thickness D2 of the head is greater than the thickness D3 of the tail.

[0010] In one embodiment, at least a portion of the thickness D4 of the transition portion shows a decreasing trend.

[0011] In one embodiment, the head portion and the transition portion are connected by a smooth transition, and the tail portion and the transition portion are connected by a smooth transition.

[0012] In one embodiment, the cross section obtained by cutting the screening portion with a plane in the height direction of the cylinder is rectangular.

[0013] In one embodiment, there are more than two blades, and the more than two blades are arranged on the screening part at intervals.

[0014] In one embodiment, the two or more blades are divided into at least a first blade and a second blade, and there are more than two of the first blade and the second blade. The two or more first blades are arranged at intervals along the circumference of the cylinder, and the two or more second blades are arranged at intervals along the cylindrical spiral line of the cylinder.

[0015] In one embodiment, the cylinder further includes a guide portion, the mounting portion is connected to the screening portion via the guide portion, and the guide portion is arranged to be inclined toward the bottom of the cylinder along the height direction of the cylinder and close to one end of the screening portion.

[0016] A slurry screening device comprises a pressure screen and the above-mentioned slurry screening rotor.

[0017] During installation, the slurry screening rotor is mounted on a pressure screen. During use, the slurry to be screened is first fed into the pressure screen through the screen's feed port. The pressure screen is then activated, causing the screen to drive the slurry screening rotor to rotate, and the blades to rotate and agitate the slurry. The screen frame then screens the slurry, allowing qualified non-wood fibers to pass through the gaps in the frame and be discharged, while coarse fibers in the slurry gradually sink between the rotor and the frame. Finally, the coarse fibers are flushed out. The blades of this slurry screening rotor have an arc-shaped head, which creates a smooth transition pulse during the agitation of the non-wood fiber slurry, improving the fluidity of the non-wood fiber slurry and providing gentler treatment of the non-wood fibers. This effectively reduces rotational resistance, thereby reducing the energy consumption of the pressure screen. This also helps extend the blade's service life and enhances the overall reliability of the slurry screening rotor. Furthermore, the blades, which decrease in width from head to tail, effectively increase the slurry suction area, which helps increase slurry concentration and, in turn, the production capacity of the non-wood fiber slurry screening equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a slurry screening rotor according to an embodiment;

[0021] Figure 2 Schematic diagram of the structure of the screening unit after expansion in one embodiment;

[0022] Figure 3 is a schematic diagram of a blade structure described in one embodiment;

[0023] Figure 4 is a top view of a slurry screening rotor according to one embodiment;

[0024] Figure 5 for Figure 4 Schematic diagram of the structure of circle A.

[0025] Description of reference numerals:

[0026] 100. Slurry screening rotor; 110. Cylinder; 111. Mounting portion; 112. Screening portion; 113. Diversion portion; 120. Blades; 121. Head portion; 122. Tail portion; 123. Transition portion; 124. First blade; 125. Second blade; 200. Screen frame. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] In one embodiment, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A slurry screening rotor 100 is used to rotate around its own axis under the drive of a pressure screen, and includes: a cylinder 110 and a blade 120. The cylinder 110 is provided with a mounting portion 111 and a screening portion 112, and the mounting portion 111 is connected to the screening portion 112. The mounting portion 111 is used to connect to the pressure screen, and the screening portion 112 is used to stir the slurry. The blade 120 is arranged on the screening portion 112. The blade 120 includes a head 121, a tail 122 and a transition portion 123. The head 121 and the tail 122 are respectively arranged on opposite sides of the transition portion 123, and the outline of the head 121 is arc-shaped. The width W1 of the transition portion 123 tends to decrease along at least a portion of the direction from the head 121 to the tail 122.

[0034] During the installation process, the slurry screening rotor 100 is installed on the pressure screen. During use, first, the slurry to be screened is fed into the pressure screen from the feed port of the pressure screen; then, the pressure screen is started, so that the pressure screen drives the slurry screening rotor 100 to rotate, and the blades 120 drive the slurry to rotate and stir; then, through the screening effect of the screen frame 200, qualified non-wood fibers are discharged through the gap of the screen frame 200, while the coarse fibers in the slurry gradually sink between the rotor and the screen frame 200; finally, the coarse fibers are flushed out through flushing. In this slurry screening rotor 100, the head 121 of the blade 120 has an arc-shaped profile, which generates a smooth transition pulse during the stirring process of the non-wood fiber slurry, improves the fluidity of the non-wood fiber slurry, and makes the non-wood fiber treatment more gentle, effectively reduces the rotational resistance, and thus reduces the energy consumption of the pressure screen; at the same time, it is beneficial to increase the service life of the blade 120 and improve the overall reliability of the slurry screening rotor 100. In addition, the blade 120 with a decreasing width from the head 121 to the tail 122 effectively increases the suction area of ​​the pulp, which is beneficial to increasing the pulp concentration and further increasing the production capacity of the non-wood fiber pulp screening equipment.

[0035] Optionally, the mounting portion 111 and the screening portion 112 may be connected by threaded connection, bolted connection, welding, riveting, snap connection, bonding or other connection methods, or the mounting portion 111 and the connecting portion may be an integrally formed structure.

[0036] Specifically, see Figure 1 The mounting portion 111 and the screening portion 112 are connected in an integrally formed structure. This helps improve the connection stability between the mounting portion 111 and the screening portion 112, ensures the structural stability of the cylinder 110, and improves the stability of the cylinder 110 during high-speed rotation, preventing shaking. This further improves the screening efficiency of the blades 120 for non-wood fiber slurry and enhances the reliability of the slurry screening rotor 100. This embodiment only provides one specific connection method between the mounting portion 111 and the screening portion 112, but is not limited to this.

[0037] Optionally, the blades 120 and the screening portion 112 may be connected by threaded connection, bolted connection, welding, riveting, snap connection, bonding or other connection methods, or the blades 120 and the screening portion 112 may be an integrally formed structure.

[0038] Specifically, see Figure 1 and Figure 2The blades 120 are connected to the screening portion 112 via bolts. This arrangement facilitates simple operation and assembly, improving the stability of the connection between the blades 120 and the screening portion 112 and facilitating installation and maintenance of the blades 120. Furthermore, the modular blades 120 reduce the production difficulty and cost of the cylinder 110, thereby improving the economic efficiency of the slurry screening rotor 100. This embodiment only provides one specific connection method between the blades 120 and the screening portion 112, but is not intended to be limiting.

[0039] It should be noted that the width W1 of the transition portion 123 shows a decreasing trend along at least a portion of the direction from the head 121 to the tail 122. It should be understood that the width W1 of the blade 120 from the head 121 to the tail 122 may first remain unchanged and then become smaller, or first become smaller and then remain unchanged, or the width W1 may continue to decrease.

[0040] Optionally, the width W1 of the blade 120 may vary linearly, nonlinearly, or in other manners from the head 121 to the tail 122 .

[0041] Specifically, see Figure 2 The width W1 of the blade 120 decreases linearly. This helps reduce the production cost of the blade 120 while effectively improving the wear resistance of the blade 120, extending the service life of the blade 120, reducing the replacement cycle of the blade 120, and improving the operational reliability of the slurry screening rotor 100. This embodiment only provides one method for changing the width W1 of the blade 120, but is not limited to this.

[0042] Optionally, the outline of the tail portion 122 may be rectangular, trapezoidal, arc-shaped, triangular or other shapes.

[0043] In one embodiment, the tail portion 122 has a linear profile, and the profile diameter φ of the head portion 121 is greater than the profile length d of the tail portion 122. This arc-shaped profile facilitates the creation of a maximum effective suction zone, improves the fluidity of the non-wood fiber slurry, and provides gentler fiber processing, thereby increasing the concentration of the non-wood fiber slurry after screening. Furthermore, the linear tail portion facilitates the formation of turbulence during slurry agitation, increasing friction between the slurries, thereby improving the agitation quality and concentration of the non-wood fiber slurry and, in turn, the screening efficiency of the slurry screening rotor 100. This embodiment provides only one specific implementation of the profile of the tail portion 122, but is not intended to be limiting.

[0044] In one embodiment, the tail portion 122 has an arc-shaped profile (not shown). Furthermore, the radius of the head portion 121 is greater than that of the tail portion 122. This arc-shaped profile helps create a maximum effective suction area, improves the fluidity of the non-wood fiber slurry, and provides gentler fiber treatment, thereby increasing the concentration of the screened non-wood fiber slurry. Furthermore, the arc-shaped tail portion 122 helps reduce friction between the blades 120 and the non-wood fiber slurry, thereby reducing energy consumption and improving the user experience of the slurry screening rotor 100.

[0045] In one embodiment, see Figure 4 and Figure 5 , along the direction from the head 121 to the tail 122, the thickness D1 of the blade 120 at least partially decreases. Thus, during the rotation of the pulp screening rotor 100, along the circumferential direction of the cylinder 110, from the head 121 to the tail 122, the distance between the blade 120 and the screen frame 200 at least partially increases. This helps improve the fluidity of the pulp and enhances the flushing effect of the pulp on the screen frame 200. At the same time, the gradually increasing gap helps reduce the blockage of the screen frame 200 by non-wood fibers, thereby ensuring the screening effect of the screen frame 200 and improving the screening efficiency and reliability of the pulp screening rotor 100.

[0046] It should be noted that, along the direction from the head 121 to the tail 122, the thickness D1 of the blade 120 at least partially shows a decreasing trend. It should be understood that, from the head 121 to the tail 122, the thickness D1 of the blade 120 may first remain unchanged and then decrease, or may first decrease and then remain unchanged, or the thickness D1 may continue to decrease.

[0047] Optionally, along the direction from the head portion 121 to the tail portion 122 , the thickness D1 of the blade 120 may vary linearly, nonlinearly, or in other manners.

[0048] Specifically, see Figure 4 and Figure 5 The thickness D1 of blade 120 changes in a circular arc. This helps improve the wear resistance of blade 120, reduces wear between blade 120 and non-wood fiber slurry during high-speed rotation, extends the service life of blade 120, reduces the replacement cycle of blade 120, and improves the operational reliability of slurry screening rotor 100. Furthermore, the nonlinear decrease in blade 120 thickness D1 helps reduce energy consumption during rotation, thereby improving the economic efficiency of pressure screens for non-wood fiber slurry screening. This embodiment only provides one method for changing the thickness D1 of blade 120, but is not limited to this method.

[0049] Specifically, see Figure 4 and Figure 5Along the direction from head 121 to tail 122, the thickness D2 of head 121 is greater than the thickness D3 of tail 122. In this way, the gradually decreasing thickness of blades 120 helps increase the flow rate and agitation efficiency of the non-wood fiber slurry, creating a good turbulent effect, thereby preventing non-wood fiber flocculation and reducing fiber loss. This reduces wear between blades 120 and the non-wood fiber slurry at high-speed rotation, extending the service life of blades 120, reducing the replacement cycle of blades 120, and improving the operational reliability of slurry screening rotor 100. At the same time, it effectively causes the non-wood fiber slurry to periodically flush the screen frame 200, improving the filtration efficiency of the screen frame 200 and preventing clogging, thereby increasing slurry concentration and reducing overall energy consumption.

[0050] In one embodiment, see Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The head portion 121 and the transition portion 123 are connected by a smooth transition, and the tail portion 122 and the transition portion 123 are connected by a smooth transition. In this way, the transition portion 123 is conducive to increasing the length of the blade 120, thereby improving the stirring effect of the pulp screening rotor 100 on the non-wood fiber pulp, increasing the flow rate of the non-wood fiber pulp, and thereby increasing the pulp concentration and the screening efficiency of the pulp screening rotor 100. At the same time, the smoothly transitioned head portion 121 and the tail portion 122 are conducive to improving the fluidity of the pulp and enhancing the flushing effect of the pulp on the screen frame 200. On the other hand, the accelerated flow rate of the non-wood fiber pulp can also effectively reduce the blockage of the non-wood fiber on the screen frame 200, thereby improving the screening efficiency and reliability of the pulp screening rotor 100.

[0051] Further, see Figure 4 and Figure 5 The thickness D4 of the transition portion 123 at least partially decreases. Thus, during the rotation of the pulp screening rotor 100, the distance between the blades 120 and the screen frame 200 along the circumference of the cylinder 110, from the head portion 121 to the tail portion 122, at least partially increases. This helps improve the fluidity of the pulp and the flushing effect of the pulp on the screen frame 200. It also helps reduce clogging of the screen frame 200 by non-wood fibers, thereby improving screening efficiency and enhancing the screening efficiency and reliability of the pulp screening rotor 100.

[0052] In order to further understand and illustrate the circumference of the cylinder 110, Figure 4 For example, the circumference of the cylinder 110 is Figure 4 The direction indicated by an arrow in the middle curve S2.

[0053] In one embodiment, see Figure 1The cross-section of the screening portion 112, taken along a plane in the height direction of the cylinder 110, is rectangular. This simplifies the manufacturing of the cylinder 110, thereby reducing its production cost. Furthermore, the upright cylinder 110 improves the operational stability of the slurry screening rotor 100, preventing production accidents caused by rotor swaying, such as blades 120 striking the screen frame 200. This improves the reliability and safety of the slurry screening rotor 100.

[0054] In order to further understand and illustrate the height direction of the cylinder 110, Figure 1 For example, the height direction of the cylinder 110 is Figure 1 The direction indicated by any arrow on the straight line S1.

[0055] In one embodiment, see Figure 1 、 Figure 2 and Figure 5 There are two or more blades 120. The two or more blades 120 are spaced apart on the screening portion 112. The two or more blades 120 are advantageously used to increase the contact area between the blades 120 and the non-wood fibers and the pulp, thereby enhancing the stirring effect of the pulp screening rotor 100 and improving the screening efficiency.

[0056] Further, see Figure 1 and Figure 2 , the two or more blades 120 are divided into at least a first blade 124 and a second blade 125. There are more than two first blades 124 and more than two second blades 125. The two or more first blades 124 are arranged at intervals along the circumference of the cylinder 110, and the two or more second blades 125 are arranged at intervals along the cylindrical spiral line of the cylinder 110. In this way, the two or more first blades 124 arranged circumferentially are conducive to improving the fluidity of the non-wood fiber slurry, thereby increasing the concentration of the slurry. On the other hand, the second blades 125 are arranged at intervals along the cylindrical spiral line of the cylinder 110, so that the slurry forms a vortex when rotating, and there are more second blades 125 at any height to screen and stir the slurry, which is more gentle on the fiber treatment, effectively improving the fluidity of the non-wood fiber slurry, and thereby improving the concentration and screening quality of the non-wood fiber slurry. At the same time, the second blades 125 arranged at intervals along the cylindrical spiral line are also conducive to saving the energy consumption of the pressure screen, thereby improving economic benefits.

[0057] It should be noted that the two or more second blades 125 are arranged at intervals along the cylindrical spiral line of the cylinder 110, which should be understood as the cylinder 110 is a cylinder, and the cylindrical spiral line of the cylinder 110 is the array trajectory, and the two or more second blades 125 are arranged in an array at intervals along this array trajectory.

[0058] In one embodiment, see Figure 1The cylinder 110 further includes a flow guide 113. The mounting portion 111 is connected to the screening portion 112 via the flow guide 113. The flow guide 113, located at one end near the screening portion 112, is tilted toward the bottom of the cylinder 110 along the height direction of the cylinder 110. This tilted flow guide 113 facilitates rapid introduction of non-wood fiber slurry into the screening portion 112 for screening. During rotation, the slurry from the upper portion of the cylinder 110 flows downward, improving the slurry screening efficiency and, in turn, the quality of non-wood fiber slurry screening, thereby ensuring the screening efficiency of non-wood fiber slurry.

[0059] In one embodiment, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , a slurry screening device, including a pressure screen and the above-mentioned slurry screening rotor 100.

[0060] During the installation process of the above-mentioned slurry screening equipment, the slurry screening rotor 100 is installed on the pressure screen. During use, first, the slurry to be screened is fed into the pressure screen from the feed port of the pressure screen; then, the pressure screen is started so that the pressure screen drives the slurry screening rotor 100 to rotate, and the blades 120 drive the slurry to rotate and stir; then, through the screening effect of the screen frame 200, qualified non-wood fibers are discharged through the gap of the screen frame 200, while the coarse fibers in the slurry gradually sink between the rotor and the screen frame 200; finally, the coarse fibers are flushed and discharged. In this slurry screening rotor 100, the head 121 of the blade 120 has an arc-shaped profile, which produces a smooth transition pulse during the slurry stirring process, improves the slurry fluidity, and is gentler on the fiber treatment, effectively reducing the rotational resistance, thereby reducing the energy consumption of the pressure screen; at the same time, it is beneficial to increase the service life of the blade 120 and improve the overall reliability of the slurry screening rotor 100. In addition, the blade 120 with a decreasing width from the head 121 to the tail 122 effectively increases the suction area of ​​the slurry, which is beneficial to increasing the slurry concentration and further increasing the production capacity of the slurry screening equipment.

[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A slurry screening rotor, used to rotate around its own axis under the drive of a pressure screen, characterized in that: The slurry screening rotor comprises: A cylinder, wherein the cylinder is provided with a mounting portion and a screening portion, the mounting portion is connected to the screening portion, the mounting portion is used to be connected to the pressure screen, and the screening portion is used to stir the slurry; A blade is provided on the screening portion, wherein the blade includes a head portion, a tail portion, and a transition portion, the head portion and the tail portion are respectively provided on opposite sides of the transition portion, and the profile of the head portion is arc-shaped, and the width W1 of the transition portion decreases along at least a portion of the direction from the head portion to the tail portion, including: the width W1 first decreases and then remains unchanged along the direction from the head portion to the tail portion; and the profile of the tail portion is linear; Along the direction from the head to the tail, at least a portion of the thickness D1 of the blade shows a decreasing trend, including: a changing trajectory of the thickness D1 of the blade is an arc shape.

2. The slurry screening rotor according to claim 1, characterized in that: The outline diameter φ of the head portion is greater than the outline length d of the tail portion.

3. The slurry screening rotor according to claim 1, characterized in that: Along the direction from the head to the tail, a thickness D2 of the head is greater than a thickness D3 of the tail.

4. The slurry screening rotor according to claim 3, characterized in that: At least a portion of the thickness D4 of the transition portion shows a decreasing trend; and / or, The head portion and the transition portion are connected by a smooth transition, and the tail portion and the transition portion are connected by a smooth transition.

5. The slurry screening rotor according to any one of claims 1 to 4, characterized in that: The screening portion is cut into a cross section along a plane in the height direction of the cylinder, and the cross section is rectangular.

6. The slurry screening rotor according to claim 1, characterized in that: There are more than two blades, and the more than two blades are arranged on the screening part at intervals.

7. The slurry screening rotor according to claim 6, characterized in that: The two or more blades are divided into at least first blades and second blades. There are more than two of the first blades and the second blades. The two or more first blades are arranged at intervals along the circumference of the cylinder, and the two or more second blades are arranged at intervals along the cylindrical spiral line of the cylinder.

8. The slurry screening rotor according to claim 1, characterized in that: The cylinder further includes a guide portion, through which the mounting portion is connected to the screening portion. The guide portion is close to one end of the screening portion and is arranged obliquely toward the bottom of the cylinder along the height direction of the cylinder.

9. A slurry screening device, characterized in that: The slurry screening equipment includes a pressure screen and the slurry screening rotor according to any one of claims 1 to 8.

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