Screening machine

Abstract

The application discloses a screening machine, which comprises multiple swing shafts, each of which is sleeved with multiple spider claw top line screen sheets; a spacer sleeve is arranged between two adjacent spider claw top line screen sheets; the spacer sleeve is a spade-shaped spacer sleeve; the spider claw top line screen sheets on the adjacent swing shafts are arranged in a staggered mode; the spider claw top line screen sheet is composed of a left spider claw top line screen sheet and a right spider claw top line screen sheet; the left spider claw top line screen sheet of the spider claw top line screen sheet on each swing shaft extends into the gap between the right spider claw top line screen sheets of the adjacent spider claw top line screen sheets on the adjacent swing shafts on one side; and the right spider claw top line screen sheet of the spider claw top line screen sheet on each swing shaft extends into the gap between the left spider claw top line screen sheets of the adjacent spider claw top line screen sheets on the adjacent swing shafts on the other side. The application solves the problems of easy clogging of screen holes and low screening efficiency of the screen surface of the existing screening machine when dry screening sticky and wet materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screening machines, and in particular to a screening machine with a space three-dimensional floating slot screen surface composed of multiple groups of spider-shaped claw top line screen pieces and spacer sleeves. BACKGROUND

[0002] Screening machines are widely used in mining, metallurgy, coal, chemical industry, electric power, construction, transportation, environmental protection and other industries.

[0003] The dry screening technology for classifying 13mm wet fine coal has been a difficult problem in the coal preparation industry, and there is no good solution at home and abroad, especially for 3mm dry screening, which is a worldwide problem.

[0004] The screen surface is the basic working part of the screen machine, mainly the plane screen surface, and also the arc screen surface, spiral screen surface and conical screen surface. Since the French engineer designed the electric heating screen surface vibrating screen in 1960 to overcome the problem of dry deep screening of sticky raw coal, engineers at home and abroad have never stopped their exploration, and have made great progress, such as the reinforced screen (China) and the string screen (China) which can conduct dry deep screening of sticky materials with particle size of more than 3 mm, and the string screen (Finland hydraulic screen separator, Australia) which can conduct dry deep screening of sticky materials with particle size of more than 2 mm. However, the screeners with these screen surfaces currently have the problems of not adapting to full particle size screening (i.e. only adapting to screening of a certain particle size), low reliability, low screening efficiency, small processing capacity and difficulty in large-scale production. In order to solve the above problems, many inventors have tried to invent various types of screeners, such as the Chinese invention patent with the application number 201410511988.8, the authorization announcement number CN104275300B and the name of "slit three-dimensional floating screen surface", which solves the above problems: adapting to full particle size screening, being suitable for thick layer screening, high screen surface strength, no sticky plugging on the screen surface, mainly forced screen passing with non-forced screen passing, high screening efficiency, large processing capacity, low noise, not relying on excitation force screening, which reduces many technical obstacles, and being suitable for designing and manufacturing large-scale screeners. However, the screener with the slit three-dimensional floating screen surface also has the following shortcomings in actual application: when the screened materials in the screen slit are removed from each other, the mutual intersection angle of the tangent lines of the spider claws of the screen pieces on the adjacent swing shafts will be less than 50°, that is, the component force in the direction of the normal line of the screen surface is too large, which will press the hard materials (such as coal gangue) in the screened materials, especially the sharp split hard materials, into the screen slit; when the V-shaped area changes from large to small, the tangent lines of the spider claws of the screen pieces on the adjacent swing shafts that constitute the V-shaped area will have an included angle of less than 35°, and the V-shaped area V tip has an included angle of less than 35°, that is, in the process of the V-shaped area changing from large to small, the component force in the direction of the normal line of the screen surface will gradually and significantly be greater than the component force in the direction of the tangent line of the screen surface, and at the V tip, the screened materials, especially the sharp split screened materials, will be pressed into the screen slit; the bite angle of general rock is 38°, so it is easy to bite the screened materials such as coal gangue in the V-shaped area; and all of the above will cause the machine to be stuck and damaged. SUMMARY

[0005] The problem solved by the present application is to provide a screener capable of self-unblocking the screen slit, so as to solve the problems of easy plugging of the screen hole and low screening efficiency of the existing screeners when screening sticky materials by dry method.

[0006] In order to solve the above problems, the technical scheme adopted by the present application is: the screening machine comprises a plurality of swing shafts arranged in sequence on a screen frame and driven by a power machine, each of the swing shafts is sleeved with a plurality of screen pieces at intervals, a spacer sleeve is arranged between adjacent screen pieces, and the screen pieces on adjacent swing shafts are arranged in a staggered manner; the center of the swing shaft is O1, and the spacing between the center lines of adjacent swing shafts passing through the center O1 is D.

[0007] The screen piece is a spider claw top line screen piece, the spider claw top line is the outer contour line of the spider claw top line screen piece, and comprises a left spider claw top line of a left part and a right spider claw top line of a right part; the left spider claw top line of the spider claw top line screen piece on each swing shaft extends into the gap between the two adjacent right spider claw top lines on the adjacent swing shaft; and the right spider claw top line of the spider claw top line screen piece on each swing shaft extends into the gap between the two adjacent left spider claw top lines on the adjacent swing shaft.

[0008] The left spider claw top line of the left part comprises a left pointed tip, a left hook, a left leg, a left top, and a left shoulder; the left spider claw top line is limited within the range defined by a left surrounding arc line, the center of the left surrounding arc line is A06, and the radius thereof is Rwz, Rwz=D.

[0009] The right spider claw top line of the right part comprises a right pointed tip, a right hook, a right leg, a right arm, a right top, and a right shoulder; the right spider claw top line is limited within the range defined by a right surrounding arc line, the center of the right surrounding arc line is A05, and the radius thereof is Rwy, Rwy=D.

[0010] The intersection point of the left spider claw top line and the right spider claw top line is a valley point, the coordinate value of the valley point on the x-axis deviating from the y-axis is a valley point offset E, -0.3D≤E≤0.15D, the coordinate value of the valley point on the y-axis is a valley point height H, 0.35*max(Ra1, Ra2)≤H≤0.75max(Ra1, Ra2), and a circular arc with a radius RA6'-A6''≤0.25D is used to transition the valley point A6 to meet the requirements of forming processes (flame cutting, plasma cutting, water jet cutting, wire cutting, laser cutting, casting, extrusion, winding, etc.) and heat treatment processes.

[0011] When the spider claw top line screen piece swings around the rotation center O1, the included angle between the x-axes at the uppermost position and the lowermost position is a full swing angle Ψ, Ψ≤180°.

[0012] When the x-axis of the spider claw top line swings counterclockwise upward to an angle of +Ψ / 2 with the x-axis, the position is the uppermost position θ+, at which the right spider claw top line is at the uppermost position and the left spider claw top line is at the lowermost position.

[0013] The position of the top line of the spider claw when the x-axis of the top line of the spider claw is aligned with the x-axis is the zero position θ0;

[0014] The position of the top line of the spider claw when the x-axis of the top line of the spider claw is aligned with the x-axis is the zero position θ0;

[0015] The spider claw top line of the spider claw top line screen piece: the x-axis is the starting edge, the left shoulder angle is λ, -25°≤λ≤10°; the x-axis is the starting edge, the right shoulder angle is μ, -10°≤μ≤25°, │λ│+│μ│≤50°; the left angle is ε, 45°≤ε≤85°; the right angle is ζ, 45°≤ζ≤85°; the right intersection angle is α, 90°≤α≤100°+│μ│; the left intersection angle is β, 90°≤β≤100°+│λ│; the relationship between the angles is α=ε+(│λ│+│μ│), β=ζ+(│λ│+│μ│).

[0016] The above-mentioned screen machine technical scheme can be more specific technical scheme: the left pick point is on the left pick circular arc line, the center of the left pick circular arc line is O1, and the radius thereof is Ra1, 0.57D≤Ra1≤0.9D;

[0017] The left pick hook is an inwardly concave circular arc segment, one end of which is connected to the left pick point A1, and the other end is connected to the A2 point and the left leg, and the circular arc radius of the left pick hook is RA1-A2, 0.025≤RA1-A2≤2D;

[0018] The left leg is a circular arc segment, the chord of the left leg is coincident with the left leg line A2'-C1, the chord height is h1, h1≤0.05D, the radius is RA2-A3, RA2-A3≥0.45D, one end of the left leg is connected to the left pick hook, and the other end is connected to the left top; when h1=0, the radius RA2-A3 is ∞, the left leg is a straight line segment;

[0019] The left top is an outwardly convex circular arc segment, one end of which is connected to the left leg, and the other end is connected to the left shoulder, the left top is limited in the range defined by the left surrounding circular arc line Wza-Wzb, the left drop point circular arc line on which the left drop point C3 is located is limited in the range defined by the left large top surrounding circular arc line and the left small top surrounding circular arc line, the center of the left large top surrounding circular arc line is O1, the radius thereof is Rcd, Rcx≤Rcd≤Ra1, the center of the left small top surrounding circular arc line is O1, the radius thereof is Rcx, 0.8Ra1≤Rcx≤Rcd, the center of the left drop point circular arc line is O1, and the radius thereof is Rc3, Rcx≤Rc3≤Rcd;

[0020] The left shoulder is a circular arc segment, the chord of the left shoulder coincides with the left shoulder line, the chord height is h3, h3≤0.05D, the radius is RA5-A6, RA5-A6≥0.45D, one end of the left shoulder is connected with the left top, and the other end is connected with the right spider claw top line; when h3=0 and the radius RA5-A6 is ∞, the left shoulder is a straight line segment.

[0021] The right tip point is on the right tip circular arc line, the center of the right tip circular arc line is at O1, and the radius thereof is Ra2, 0.57D≤Ra2≤0.9D;

[0022] The right hook is a concave circular arc segment, one end of the right hook is at the right tip point, and the other end is connected with the right leg, the radius of the right hook is RA11-A10, 0.025≤RA11-A10≤2D;

[0023] The right leg is a circular arc segment, the chord of the right leg coincides with the right leg line A10'-C2, the chord height is h2, h2≤0.05D, the radius is RA10-A9, RA10-A9≥0.45D, one end of the right leg is connected with the right hook, and the other end is connected with the right arm; when h2=0 and the radius RA10-A9 is ∞, the right leg is a straight line segment;

[0024] The right arm is a convex circular arc segment, one end of the right arm is connected with the right leg, and the other end is connected with the right top, and the right arm is limited in the range defined by the right enclosing circular arc line;

[0025] The right top is a convex circular arc segment, one end of the right top is connected with the right arm, and the other end is connected with the right shoulder, and the right top is limited in the range defined by the right enclosing circular arc line, the right drop point circular arc line of the right drop point on the right top is limited in the range defined by the right large top enclosing circular arc line and the right small top enclosing circular arc line, the center of the right large top enclosing circular arc line is at O1, and the radius thereof is Rbd, Rbx≤Rbd≤Ra2; the center of the right small top enclosing circular arc line is at O1, and the radius thereof is Rbx, 0.8 Ra2≤Rbx≤Rbd; the center of the right drop point circular arc line is at O1, and the radius thereof is Rc4, Rbx≤Rc4≤Rbd;

[0026] The right shoulder is a concave circular arc segment, one end of the right shoulder is connected with the left spider claw top line and is tangent to or connected with the right shoulder line, and the other end of the right shoulder is connected with the right top, and the radius of the right shoulder is RA7-A6, RA7-A6≥0.4D; when the radius RA7-A6 is ∞, the right shoulder is a straight line segment.

[0027] Further, the spacer sleeve is a spade-shaped spacer sleeve, including a left spade line, a right spade line, a left top-avoiding line, a right top-avoiding line and three segments of hub rim arcs with a radius of Rg;

[0028] The right horn line is a circular arc with a center at A01, a radius of D, and tangent to a right horn line base circle with a radius of Rd1 at point B4;

[0029] The left horn line is a circular arc with a center at A02, a radius of D, and tangent to a left horn line base circle with a radius of Rd2 at point B2;

[0030] When Re < Rg, the left top-avoiding line is composed of three circular arcs that are tangent to each other: one is a circular arc B12-B13 with a center at A04 and a radius of D, one is a circular arc B11-B12 with a center at O1, a radius of Re, and a preset angle of Δ1, which is coincident with the left top-avoiding line base circle, B11 and B12 are tangent points, and one is a circular arc B10-B11 with a center at A07 and a radius of D; when Re ≥ Rg, the left top-avoiding line 1-3-3 is a circular arc B10-B12(B11)-B13 with a center at O1 and a radius of Rg, the preset angle Δ1 is a central angle with a vertex at the center O1, a radius of Re, and an initial side O1-B12, 0° ≤ Δ1 ≤ 40°;

[0031] When Rf < Rg, the right top-avoiding line is composed of three circular arcs that are tangent to each other: one is a circular arc B6-B7 with a center at A03 and a radius of D, one is a circular arc B7-B8 with a center at O1, a radius of Rf, and a preset angle of Δ2, which is coincident with the right top-avoiding line base circle, B7 and B8 are tangent points, and one is a circular arc B8-B9 with a center at A08 and a radius of D; when Rf ≥ Rg, the right top-avoiding line is a circular arc B6-B7(B8)-B9 with a center at O1 and a radius of Rg, the preset angle Δ2 is a central angle with a vertex at the center O1, a radius of Rf, and an initial side O1-B7, -40° ≤ Δ2 ≤ 0°;

[0032] The shaft hub radius Rg is the common radius of the spider claw top line screen piece shaft hub and the spacer shaft hub arc, 0.25D ≤ Rg ≤ 0.7D;

[0033] The intersection of the left horn line and the right horn line is the horn tip point B3, the line connecting the horn tip point B3 and the center O1 is the tip center line B3-O1, the distance from the horn tip point B3 to the center O1 is the tip center distance J, 0.6H ≤ J ≤ 1.3H, and the included angle between the tip center line and the y-axis is the deflection angle φ, -3° ≤ φ ≤ 5°;

[0034] When the spider claw screen piece and the horn-shaped spacer jointly oscillate around the rotation center O1, the left pick-up point A1 of the left spider claw top line on the adjacent right shaft (O1, O100) and the right horn line of the horn-shaped spacer on the adjacent left shaft (O10, O1) have a left pick-up interval Va1 in the normal direction, 0.01 ≤ Va1 ≤ 15;

[0035] The distance between the right tip point A11 of the right spider claw top line on the adjacent left side shaft (O10, O1) and the left horn line of the left horn-shaped spacer sleeve on the adjacent right side shaft (O1, O100) in the normal direction is a right tip distance Va2, 0.01≤Va2≤15;

[0036] The distance between the left tip point A8-A7 of the right spider claw top line on the adjacent left side shaft (O10, O1) and the right falling point C4 of the right spider claw top line on the adjacent right side shaft (O1, O100) in the normal direction is a Vb, 0.01≤Vb≤15;

[0037] The distance between the left tip point A3-A4-A5 of the right spider claw top line on the adjacent left side shaft (O10, O1) and the left falling point C3 of the left spider claw top line on the adjacent right side shaft (O1, O100) in the normal direction is a Vc, 0.01≤Vc≤15.

[0038] Further, the left leg is a straight line; the left shoulder is a straight line; the right leg is a straight line; and the right shoulder is a straight line.

[0039] Further, the spacer sleeve is a circular ring-shaped spacer sleeve.

[0040] Further, the spider claw top line screen piece is a plate-shaped plate piece screen piece or a plate-shaped plate claw screen piece.

[0041] Further, the spider claw top line screen piece is fused with the spacer sleeve to form a winding-shaped spider claw top line screen piece.

[0042] Further, the spider claw top line screen piece is fused with the spacer sleeve to form a winding-shaped spider claw top line screen piece.

[0043] Further, the spider claw top line screen piece is fused with the spacer sleeve to form a winding-shaped spider claw top line screen piece.

[0044] Further, the spider claw top line screen piece is fused with the spacer sleeve to form a winding-shaped spider claw top line screen piece.

[0045] Further, the spider claw top line screen piece is fused with the spacer sleeve to form a winding-shaped spider claw top line screen piece.

[0046] Compared with the prior art, the present application has the following beneficial effects:

[0047] 1、The application has higher reliability: (1) In the whole swing process, the mutual intersection angle of the tangent lines of any intersection point of the spider claw top line of the spider claw top line screen piece on the swing shaft and the spider claw top line of the screen piece on the adjacent shaft is always ≥ min (α, β) (the right intersection angle α > 90°, the left intersection angle β > 90°), that is, when removing the clogging of the screened material in the screen gap, the force in the direction of the screen normal is zero, and the clogging of the screened material in the screen gap is always removed outward; the right shoulder wear reduces the right intersection angle α, the left leg wear increases the right intersection angle α, the left shoulder wear reduces the left intersection angle β, and the right leg wear increases the left intersection angle β, therefore, even if the left shoulder angle λ of the spider claw top line screen piece is 10° (with the x-axis as the initial edge) and the right shoulder angle μ is -10° (with the x-axis as the initial edge), the mutual intersection angle of the tangent lines of any intersection point is still > 70°, that is, the force in the direction of the screen normal is much smaller than the force in the direction of the screen tangent, and the clogging of the screened material in the screen gap is still removed outward. (2) When the swing shaft swings to the lower extreme position θ- swing, the right side of the V-shaped area is the A1-A2-A3-C3 section of the left spider claw top line of the spider claw top line screen piece on the adjacent right swing shaft (O1, O100), and the left side is the A6-A7 section of the right shoulder of the right spider claw top line of the spider claw top line screen piece on the adjacent left swing shaft (O10, O1) and the A6-A5-A4(C3) section of the left spider claw top line of the spider claw top line screen piece, the left included angle ε (45° ≤ ε ≤ 85°) of the left spider claw top line is the included angle between the left shoulder A6-A5 on the left side and the left leg A2'-A3 on the right side of the V-shaped area, and the included angle ε between the two straight lines is always unchanged in the process of increasing and decreasing in the V-shaped area; when the swing shaft swings to the upper extreme position θ+ swing, the right side of the V-shaped area is the A6-A7 section of the right shoulder of the right spider claw top line of the spider claw top line screen piece on the adjacent right swing shaft (O1, O100), and the left side is the A11-A10-A9-A8(C4) section of the right spider claw top line of the spider claw top line screen piece on the adjacent left swing shaft (O10, O1), the right included angle ζ (45° ≤ ζ ≤ 85°) of the right spider claw top line is the included angle between the right leg A10'-A9 on the left side and the right shoulder line A6-C2 on the right side of the V-shaped area, and the included angle ζ between the two straight lines is always unchanged in the process of increasing and decreasing in the V-shaped area; the spider claw top line corresponding to the left and right sides of the V-shaped area only moves horizontally (or parallelly), that is, the included angle of the V-shaped area does not change, only the size of the area changes, which forces the clogging of the screened sticky screened material in the V-shaped area to be dispersed, displaced, layered, loosened, and screened, maximally reduces the wear of the screened material on the screen, and does not force the large particles or hard material to be pressed into the screen gap due to the sudden change of the included angle of the V-shaped area.(3). When the swing shaft swings to the upper limit position θ+, the angle between the tangent line of the intersection point of the right shoulder A6-A7 arc on the right side of the V-shaped area and the right leg A10"-A9 on the left side of the V-shaped area is >53°, and then the angle between the tangent line of the point on the right shoulder A6-A7 arc on the right side of the V-shaped area and the right leg A10"-A9 on the left side of the V-shaped area gradually decreases, until the angle between the tangent line of the A7 point on the right shoulder A6-A7 arc on the right side of the V-shaped area and the right leg A10"-A9 on the left side of the V-shaped area is still ≥45°, it can be seen that the angle of this V-shaped area is greater than the bite angle, and the situation of biting large particle screened material or hard object, causing jamming, damage to the screen piece, will not occur. (4). When the swing shaft swings to the lower limit position θ-, the right side of the V bottom of the V-shaped area is the left hook A1-A2" of the left spider claw top line of the spider claw top line screen piece on the adjacent right swing shaft (O1, O100), and the left side of the V bottom of the V-shaped area is one section of the right shoulder A6-A7 of the right spider claw top line of the spider claw top line screen piece on the adjacent left swing shaft (O10, O1), and the intersection angle of the tangent lines of the left hook A1-A2" and the right shoulder A6-A7 is >100°; when the swing shaft swings to the upper limit position θ+, the right side of the V bottom of the V-shaped area is the right shoulder A6-A7 arc of the right spider claw top line of the screen piece on the adjacent right swing shaft (O1, O100), and the left side of the V bottom of the V-shaped area is the right hook A11-A10" of the right spider claw top line of the spider claw top line screen piece on the adjacent left swing shaft (O10, O1), and the intersection angle of the tangent lines of the right hook A11-A10" and the right shoulder A6-A7 is >100°; this not only avoids the sharp compression of the screened material at the V bottom of the V-shaped area, but also reliably eliminates the defect of biting large particle screened material or hard object at the V bottom of the V-shaped area. It can be seen that the new spider claw top line screen piece designed by the present application from multiple aspects can reliably eliminate the hidden danger of jamming and damage to the screen piece.

[0048] 2. The service life of the present application is longer: (1) The present application fully considers the possible wear state of each part and provides sufficient metal wear allowance for each part of the screen piece, so that the spider claw top line screen piece of the present application looks relatively plump, especially the left shoulder A6-A5 of the left spider claw top line of the spider claw top line screen piece is raised by an angle λ (i.e. the left shoulder angle), and the right shoulder A6-A7 of the right spider claw top line is a reverse wear curve on the right shoulder line A6-C2 which is approximately replaced by a circular arc and raised by an angle μ (i.e. the right shoulder angle). (2) During the entire swing process, only the area size of the V-shaped area changes, the angle of the V-shaped area remains unchanged, and the mutual intersection angle of the tangent lines of the intersection points of the V bottom of the V-shaped area is >100°, which maximally reduces the wear of the screened material in the V-shaped area to the screen surface. Therefore, the spider claw top line screen piece of the present application has a longer service life.

[0049] 3、The strength and rigidity of the present application is higher: The spider claw top line screen piece of the present application is fat, and the strength and rigidity of the screen piece is higher; The outer shape size, cross-sectional area and moment of inertia of the plow-shaped spacer sleeve are much larger than those of the circular spacer sleeve, and the deflection of the assembled screen roller is smaller, the strength and rigidity of the screen surface is higher, and the screen surface can bear larger screen surface load.

[0050] 4、The screening efficiency of the present application is higher: The effective screen surface length of the present application with an axle distance D is 1.5 times that of a plane screen with a length D, and the opening rate is 50% regardless of the slit thickness. The A6-A5-A4(C3) segment of the left spider claw top line of the spider claw top line screen piece of the present application has a longer left shoulder A6-A5, and the right spider claw top line has a longer right leg right arm A10-A9-A8(C4), which can throw, slide and back-piston the screened material on the screen more strongly. These are beneficial to increase the contact time of the screened material on the screen and the screen surface, increase the frequency of the contact of the sieveable particles with the screen surface and the probability of screening, and the screening mode throughout the screening process is mainly forced screening and non-forced screening, which makes the screening capacity larger and the screening efficiency higher.

[0051] 5、The processing capacity of the present application is larger: Larger screening capacity, higher screening efficiency, and larger screen surface conveying capacity are required to have larger processing capacity. The present application makes the valley point A6 leftwardly offset by a distance E, makes the right shoulder A6-A7 of the right spider claw top line of the screen piece have a larger chord length, makes the right shoulder A6-A7 have a stronger ability to throw and transfer the screened material on the screen, and makes it more suitable for thick layer screening and larger processing capacity.

[0052] 6、The screen surface of the present application is cleaner: The left and right hooks of the spider claw top line of the present application and the right and left plow lines of the plow-shaped spacer sleeve cooperate with each other to clear the screened material that may be stuck on the right and left plow lines and near the plow tip, and to make no screened material accumulated above the swing shaft, so that the screen surface is cleaner and has no residual screened material.

[0053] 7、The present application is easier to design and implement: The present application creatively defines and designs the spider claw top line screen piece and the plow-shaped spacer sleeve, and puts forward reasonable parameters between each segment of the spider claw top line screen piece, between each segment of the plow-shaped spacer sleeve, and between the spider claw top line and the plow-shaped spacer sleeve, and clear mathematical expressions reflecting the relationship between them, which makes it easier to design and implement. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 is a structural schematic diagram of a plate-shaped plate piece type spider claw top line screen piece screen surface screening machine of embodiment 1 of the present application;

[0055] Figure 2 is a structural schematic diagram of a plate-shaped plate piece type half spider claw top line screen piece screen surface screening machine of embodiment 4 of the present application.

[0056] Figure 3 is Figure 1 and Figure 2 is a partial enlarged view of I in

[0057] Figure 4 is a K view of Figure 3

[0058] Figure 5 is a schematic diagram of the relationship between the main parameters D, G1, G2, K1, K2, Ra1, Ra2, Rbd, Rbx, Rcd, Rcx, Rc3, Rc4, Rd1, Rd2, Re, Rf, Rg, Va1, Va2, Vb, Vc, Δ1, Δ2, λ, μ, ε, ζ, α, β of the spider claw top line and the harrow-shaped spacer sleeve structure.

[0059] Figure 6 is a schematic diagram of the relationship between the three-arc and two-arc structure of the left top on the left spider claw top line and D, Rcd, Rcx, Rc3, Rf, Rg, Vc, Δ2.

[0060] Figure 7 is a schematic diagram of the one-arc structure of the left top on the left spider claw top line and D, Rcd, Rcx, Rc3, Rf, Rg, Vc.

[0061] Figure 8 is a schematic diagram of the two-arc structure of the right top on the right spider claw top line and D, Rbd, Rbx, Rc4, Re, Rg, Vb, Δ1.

[0062] Figure 9 is a schematic diagram of the one-arc structure of the right top on the right spider claw top line and D, Rbd, Rbx, Rc4, Re, Rg, Vb.

[0063] Figure 10 to Figure 16 is a schematic diagram of the relationship between D, Ra1, Ra2, Rc3, Rc4, Rd1, Rd2, Re, Rf, Va1, Va2, Vb, Vc, Δ1, Δ2, ε, ζ, α, β during the swinging of the spider claw top line to the upper extreme position θ+, the zero position θ0, the lower extreme position θ-, and the spider claw top line.

[0064] Figure 10 is a schematic diagram of the spider claw top line swinging to the upper extreme position θ+.

[0065] Figure 11 is a schematic diagram of the relationship between the right pointed tip A11 of the right spider claw top line 1-2-2 on the left shaft O10 swinging to the X-axis and the spacer left harrow line B1-B2-B3 and D, Ra2, Rd2, Va2, ζ, β on the right adjacent shaft O1.

[0066] Figure 12 ​C3 point of the left top of the left spider claw top line 1-2-1 on the right axis O1 is placed to the X axis, and the relationship between the left adjacent axis O10, the right horn line B6-B7-B8-B9, and D, Rc3, Rf, Vc, Δ2, ζ, β is shown;

[0067] Figure 13 The schematic diagram when the spider claw is placed to the zero position θ0;

[0068] Figure 14 A1 point of the left top of the left spider claw top line 1-2-1 on the right axis O1 is placed to the X axis, and the relationship between the left adjacent axis O10, the right horn line B6-B7-B8-B9, and D, Rc3, Rf, Vc, Δ2, ζ, β is shown;

[0069] Figure 15 C4 point of the right top of the right spider claw top line 1-2-2 on the left axis O10 is placed to the X axis, and the relationship between the right adjacent axis O1, the left horn line B10-B11-B12-B13, and D, Rc4, Re, Vb, Δ1, ζ, α is shown;

[0070] Figure 16 The schematic diagram when the spider claw top line is placed to the lower extreme point θ-.

[0071] Figure 17 The schematic diagram of the horn-shaped spacer in the front view;

[0072] Figure 18 The schematic diagram of the plate-shaped plate spider claw top line screen in the front view;

[0073] Figure 19 The schematic diagram of the combination of the horn-shaped spacer and the plate-shaped plate spider claw top line screen in the front view;

[0074] Figure 20 The schematic diagram of the combination of the horn-shaped spacer and the plate-shaped plate spider claw top line screen in the top view.

[0075] Figure 21 The schematic diagram of the circular ring-shaped spacer in the front view;

[0076] Figure 22 The schematic diagram of the plate-shaped plate spider claw top line screen in the front view;

[0077] Figure 23 The schematic diagram of the combination of the circular ring-shaped spacer and the plate-shaped plate spider claw top line screen in the front view;

[0078] Figure 24 The schematic diagram of the combination of the circular ring-shaped spacer and the plate-shaped plate spider claw top line screen in the top view.

[0079] Figure 25 The schematic diagram of the T-section plate-shaped plate spider claw top line screen in the front view;

[0080] Figure 26 T-section plate tab spider top-line screen piece front view schematic diagram.

[0081] Figure 27 Plate tab plate spider left half spider top-line screen piece front view schematic diagram;

[0082] Figure 28 Plate tab plate spider right half spider top-line screen piece front view schematic diagram;

[0083] Figure 29 Plate tab plate spider left and right half spider top-line screen piece combined front view schematic diagram:

[0084] Figure 30 Plate tab plate spider left and right half spider top-line screen piece combined top view schematic diagram: plate tab plate spider left half spider top-line screen piece in front, plate tab plate spider right half spider top-line screen piece in back;

[0085] Figure 31 Plate tab plate spider left and right half spider top-line screen piece combined top view schematic diagram: plate tab plate spider right half spider top-line screen piece in front, plate tab plate spider left half spider top-line screen piece in back.

[0086] Figure 32 Plate tab claw spider left half spider top-line screen piece front view schematic diagram;

[0087] Figure 33 Plate tab claw spider right half spider top-line screen piece front view schematic diagram;

[0088] Figure 34 Plate tab claw spider left and right half spider top-line screen piece combined front view schematic diagram:

[0089] Figure 35 Plate tab claw spider left and right half spider top-line screen piece combined top view schematic diagram: plate tab claw spider left half spider top-line screen piece in front, plate tab claw spider right half spider top-line screen piece in back.

[0090] Figure 36 Plate tab claw spider left half spider top-line screen piece with dovetail at sleeve portion joint of turn-around forming front view schematic diagram;

[0091] Figure 37 Plate tab claw spider right half spider top-line screen piece with dovetail at sleeve portion joint of turn-around forming front view schematic diagram;

[0092] Figure 38 Plate tab claw spider left and right half spider top-line screen piece combined front view schematic diagram with dovetail at sleeve portion joint of turn-around forming.

[0093] Figure 39Fig. 1 is a front view of a plate-shaped plate-pronged left half spider top screen piece with a dovetail at the shaft sleeve joint and a dovetail reinforced strut between the shaft sleeve and the left spider;

[0094] Figure 40 Fig. 2 is a front view of a plate-shaped plate-pronged right half spider top screen piece with a dovetail at the shaft sleeve joint and a dovetail reinforced strut between the shaft sleeve and the right spider;

[0095] Figure 41 Fig. 3 is a front view of a plate-shaped plate-pronged left and right half spider top screen piece combination with a dovetail at the shaft sleeve joint and a dovetail reinforced strut between the shaft sleeve and the spiders.

[0096] Figure 42 Fig. 4 is a front view of a spun spider top screen piece;

[0097] Figure 43 Fig. 5 is a top view of a spun spider top screen piece (left-hand spin);

[0098] Figure 44 Fig. 6 is a top view of a spun spider top screen piece (right-hand spin).

[0099] Figure 45 Fig. 7 is a front view of a spun left half spider top screen piece;

[0100] Figure 46 Fig. 8 is a front view of a spun right half spider top screen piece;

[0101] Figure 47 Fig. 9 is a front view of a spun left and right half spider top screen piece combination:

[0102] Figure 48 Fig. 10 is a top view of a spun left and right half spider top screen piece combination with the spun left half spider top screen piece in front and the spun right half spider top screen piece in back.

[0103] Figure 49 Fig. 11 is a front view of a spun left half spider top screen piece with a dovetail at the shaft sleeve joint;

[0104] Figure 50 Fig. 12 is a front view of a spun right half spider top screen piece with a dovetail at the shaft sleeve joint.

[0105] Figure 51 Fig. 13 is a front view of a spun left half spider top screen piece with a dovetail at the shaft sleeve joint and a dovetail reinforced strut between the shaft sleeve and the left spider;

[0106] Figure 52A front view of the right half of the spider claw top screen plate, which is formed by rotation, has a dovetail tenon at the joint of the bushing and a dovetail tenon reinforcing strut between the bushing and the right spider claw.

[0107] Explanation of the meanings of the reference numerals or letters in the figures of this invention:

[0108] 10 and 100 are adjacent swing axes with the same structure as 1, but with the screen plates and spacers positioned exactly opposite to 1. Correspondingly, O10, O1, and O100 are the rotation centers of the swing axes and the spider claw top line screen plates, and also the centers of the left tip arc, right tip arc, left large top arc, left small top arc, left side arc, left landing arc, right large top arc, right small top arc, right side arc, and right landing arc. Figure 5 ).

[0109] 1-2, Spider claw top line sieve plate; 1-2-1, Left spider claw top line of spider claw top line sieve plate; 1-2-2, Right spider claw top line of spider claw top line sieve plate; 1-2-3, Bushing portion of spider claw top line sieve plate ( Figure 5 ).

[0110] 1-3, moldboard spacer; 1-3-1, left moldboard line of the moldboard spacer; 1-3-2, right moldboard line of the moldboard spacer; 1-3-3, left top clearance line of the moldboard spacer; 1-3-4, right top clearance line of the moldboard spacer; 1-3-5, hub flange arc of the moldboard spacer ( Figure 5 , Figure 17 ).

[0111] L1—width of the sieve noodle seam, that is, the thickness of spacers 1-3 ( Figure 4 , Figure 17 , Figure 31 ).

[0112] L—thickness of the spider claw sieve plate ( Figure 4 ).

[0113] D—Axle distance: The distance between the center lines of two adjacent swing axes ( Figure 5 ).

[0114] x-axis: The horizontal axis of the moving coordinate system fixed at the rotation center O1 of the spider claw apex line ( Figure 5 ).

[0115] y-axis: The vertical axis of the moving coordinate system fixed at the rotation center O1 of the spider claw apex line ( Figure 5 ).

[0116] X-axis: Horizontal axis of static coordinates passing through the center of rotation O10-O1-O100 of the spider claw top line ( Figure 10 ).

[0117] Y-axis: Vertical axis of static coordinates passing through the rotation center O1 of the spider claw top line ( Figure 10).

[0118] Ψ—full swing angle: the included angle between the x-axis and the position of the top line of the spider claw when it swings to the uppermost position θ+ and the lowermost position θ- around the center of rotation O1 Figure 1 ).

[0119] θ+—uppermost position: the position of the x-axis of the top line of the spider claw when it swings to the uppermost position at an angle of +Ψ / 2 with the x-axis Figure 10 ) at which the right top line of the spider claw is at the uppermost position and the left top line is at the lowermost position.

[0120] θ0—zero position: the position of the x-axis of the top line of the spider claw when it coincides with the x-axis Figure 13 ).

[0121] θ-—lowermost position: the position of the x-axis of the top line of the spider claw when it swings to the lowermost position at an angle of -Ψ / 2 with the x-axis Figure 16 ) at which the left top line of the spider claw is at the uppermost position and the right top line is at the lowermost position.

[0122] left tip point A1 and right tip point A11: the starting points of the left top line and the right top line of the spider claw respectively Figure 5 ).

[0123] Wa1a-Wa1b—left tip arc: the left tip arc is the arc on which the tip point A1 of the left top line 1-2-1 of the spider claw is located, with its center at O1 and a radius of 0.57D≤Ra1≤0.9D Figure 5 ).

[0124] Wa2a-Wa2b—right tip arc: the right tip arc is the arc on which the tip point A11 of the right top line 1-2-2 of the spider claw is located, with its center at O1 and a radius of 0.57D≤Ra2≤0.9D Figure 5 ).

[0125] Wbda- Wbdb—right large top arc: the right large top arc is the maximum limit of the right drop point arc Wc4a- Wc4b on which the right drop point C4 on the right top of the right top line 1-2-2 of the spider claw is located, with its center at O1 and a radius of Rbx≤Rbd≤Ra2 Figure 5 , Figure 8 , Figure 9 ).

[0126] Wbxa- Wbxb—right small top arc: the right small top arc is the minimum limit of the right drop point arc Wc4a- Wc4b on which the right drop point C4 on the right top of the right top line 1-2-2 of the spider claw is located, with its center at O1 and a radius of Rbd≥Rbx≥0.8Ra2 Figure 5, Figure 8 , Figure 9 ).

[0127] Wcda- Wcdb—left top surrounding arc: the left top surrounding arc is the maximum limit that the left falling point C3 on the left top of the left spider claw top line 1-2-1 cannot exceed, and the center of the circle is at O1, the radius of the left top surrounding arc Rcx≤Rcd≤Ra1 Figure 5 , Figure 6 , Figure 7 ).

[0128] Wcxa- Wcxb—left top surrounding arc: the left top surrounding arc is the maximum limit that the left falling point C3 on the left top of the left spider claw top line 1-2-1 cannot exceed, and the center of the circle is at O1, the radius of the left top surrounding arc Rcx≤Rcd≤Ra1 Figure 5 , Figure 6 , Figure 7 ).

[0129] Wc3a- Wc3b—left falling point arc: the left falling point arc is the circle arc where the left falling point C3 on the left top of the left spider claw top line 1-2-1 is located, and the center of the circle is at O1, the radius of the left falling point arc Rcd≥Rc3≥Rcx Figure 5 , Figure 6 , Figure 7 ).

[0130] Wc4a- Wc4b—right falling point arc: the right falling point arc is the circle arc where the right falling point C4 on the right top of the right spider claw top line 1-2-2 is located, and the center of the circle is at O1, the radius of the right falling point arc Rbd≥Rc4≥Rbx Figure 5 , Figure 8 , Figure 9 ).

[0131] Wza- Wzb—left surrounding arc: in order to avoid collision between the left spider claw top line 1-2-1 and the hub rim arc (with a radius of Rg) of the share-shaped spacer on the adjacent shaft during swinging, the left surrounding arc is the limit that the left spider claw top line 1-2-1 cannot exceed; when Rf Figure 5 , Figure 6 ) when Rf≥Rg, the center of the circle A06 is on the x-axis, and the distance from the center of the circle O1 is Rg+ Vc Figure 7 ); the radius of the left surrounding arc Rwz=D Figure 5 , Figure 6 , Figure 7 ).

[0132] Wya-Wyb-Right surrounding arc line: In order to avoid the collision between the right spider claw top line 1-2-2 and the hub arc (with a radius of Rg) of the colter-shaped spacer on the adjacent shaft during swinging, the right surrounding arc line is the limit that the right spider claw top line 1-2-2 cannot exceed; when Re Figure 5 , Figure 8 ), when Re≥Rg, the center A05 of the right surrounding arc line is on the x-axis, and the distance from the center O1 is Rg+Vb Figure 9 ); the radius Rwy of the right surrounding arc line is D Figure 5 , Figure 8 , Figure 9 ).

[0133] A6-Valley point: It is the intersection point of the left spider claw top line 1-2-1 and the right spider claw top line 1-2-2 Figure 5 ).

[0134] E-Valley point offset distance: It is the coordinate value of the valley point A6 offset from the y-axis on the x-axis, -0.3D≤E≤0.15D Figure 5 ).

[0135] H-Valley point height: It is the coordinate value of the valley point A6 on the y-axis, 0.3*max(Ra1, Ra2)≤H≤0.75max(Ra1, Ra2) Figure 5 ).

[0136] A1-A1"-Left ankle line: It is a straight line parallel to the x-axis, passing through the left pointed tip A1 and intersecting the y-axis at A1" Figure 5 ).

[0137] A11-A11"-Right ankle line: It is a straight line parallel to the x-axis, passing through the right pointed tip A11 and intersecting the y-axis at A11" Figure 5 ).

[0138] A2'-Left ankle point: The intersection point of the left leg line A2-C1 on the left ankle line A1-A1" Figure 5 ).

[0139] A10'-Right ankle point: The intersection point of the right leg line A10-C2 on the right ankle line A11-A11" Figure 5 ).

[0140] G1-Left leg height: The distance from the left ankle line A1-A1" to the x-axis, 0.45Ra1≤G1≤0.8Ra1 Figure 5 ).

[0141] G2-Right leg height: The distance from the right ankle line A11-A11" to the x-axis, 0.45Ra2≤G2≤0.8Ra2 Figure 5).

[0142] K1 — left foot spread: is the distance between the left ankle point A2' and A1", 0.55Ra1≤ K1≤ 0.85Ra1 Figure 5 ).

[0143] K2 — right foot spread: is the distance between the right ankle point A10' and A11", 0.55Ra2≤ K1≤ 0.85Ra2 Figure 5 ).

[0144] A6-C1 — left shoulder line: is the line connecting the valley point A6 and the left intersection point C1 Figure 5 ).

[0145] A6-C2 — right shoulder line: is the line connecting the valley point A6 and the right intersection point C2 Figure 5 ).

[0146] A2'-C1 — left leg line: is the line connecting the left ankle point A2' and the left intersection point C1 Figure 5 ).

[0147] A10'-C2 — right leg line: is the line connecting the right ankle point A10' and the right intersection point C2 Figure 5 ).

[0148] C1 — left intersection point: it is the intersection of the left leg line A2'-C1 and the left shoulder line A6-C1 on the left spider claw top line 1-2-1 Figure 5 ).

[0149] C2 — right intersection point: it is the intersection of the right leg line A10'-C2 and the right shoulder line A6-C2 on the right spider claw top line 1-2-2 Figure 5 ).

[0150] C3 — left drop point: is the point on the left top of the left spider claw top line 1-2-1 which is farthest from the center O1 and closest to the x-axis (i.e., its y-coordinate value is the smallest), the tangent point B7 on the left drop point C3 and the center O1 is on the left top line of the harrow-shaped spacer Figure 6 , Figure 7 , Figure 5 ).

[0151] C4 — right drop point: is the point on the right top of the right spider claw top line 1-2-2 which is farthest from the center O1 and closest to the x-axis (i.e., its y-coordinate value is the smallest), the right drop point C4 is also the connection point of the right arm A9-A8 and the right top A8-A7, the tangent point B12 on the right drop point C4 and the center O1 is on the left top line of the harrow-shaped spacer Figure 8 , Figure 9 , Figure 5 ).

[0152] λ - left shoulder angle: it is the angle between the left shoulder line A6-C1 on the top line 1-2-1 of the left spider claw and the x-axis, with the x-axis as the initial side, -25°≤λ≤10°. Figure 5 ).

[0153] μ - right shoulder angle: it is the angle between the right shoulder line A6-C2 on the top line 1-2-2 of the right spider claw and the x-axis, with the x-axis as the initial side, -10°≤μ≤25°. Figure 5 ).

[0154] ε - left included angle: it is the included angle between the left shoulder line A6-C1 on the top line 1-2-1 of the left spider claw and the left leg line A2'-C1, 45°≤ε≤85°. Figure 5 ).

[0155] ζ - right included angle: it is the included angle between the right shoulder line A6-C2 on the top line 1-2-2 of the right spider claw and the right leg line A10'-C2, 45°≤ζ≤85°. Figure 5 ).

[0156] α - right intersection angle: it is the intersection angle between the right shoulder line A6-C2 on the top line 1-2-2 of the right spider claw and the left leg line A2'-C1 on the top line 1-2-1 of the left spider claw, 90°≤α≤100°+│μ│. Figure 5 ).

[0157] β - left intersection angle: it is the intersection angle between the left shoulder line A6-C1 on the top line 1-2-1 of the left spider claw and the right leg line A10'-C2 on the top line 1-2-2 of the right spider claw, 90°≤β≤100°+│λ│. Figure 5 ).

[0158] B3 - point of the sharp of the plough: it is the intersection point of the left plough line B1-B2-B3 and the right plough line B5-B4-B3 of the plough-shaped spacer. Figure 5 ).

[0159] J - distance from the center of the sharp: it is the distance from the center of the sharp B3 to the center O1, 0.6H≤J≤1.3H. Figure 5 ).

[0160] φ - angle of deflection: it is the included angle between the line connecting the center of the sharp B3 and the center O1 and the y-axis, -3°≤φ≤5°. Figure 5 ).

[0161] Rd1 - right plough line base circle radius: Rd1=D-Ra1-Va1, the right plough line base circle is a circle with the center at O1 and Rd1 as the radius, and the right plough line 1-3-2 (B5-B4-B3) is tangent to the right plough line base circle at the point B4. Figure 5 ).

[0162] Rd2—left horn base circle radius: Rd2=D-Ra2-Va2, the left horn base circle is a circle with center at O1 and radius Rd2, and the left horn 1-3-1 (B1-B2-B3) is tangent to the left horn base circle at B2 point Figure 8 ).

[0163] Re—left tip-avoiding base circle radius: Re=D-Rc4-Vb, the left tip-avoiding base circle is a circle with center at O1 and radius Re, and the left tip-avoiding line 1-3-3 is tangent to the left tip-avoiding base circle Figure 5 B11 and B12 points, Figure 6 B11 and B12 points).

[0164] Rf—right tip-avoiding base circle radius: Rf=D-Rc3-Vc, the right tip-avoiding base circle is a circle with center at O1 and radius Rf, and the right tip-avoiding line 1-3-4 is tangent to the right tip-avoiding base circle Figure 5 B7 and B8 points, Figure 5 B7 and B8 points).

[0165] Rg—hub radius: it is the common radius of the hub of the spider claw tip line and the hub of the horn-shaped spacer, 0.25D≤Rg≤0.7D Figure 8 ).

[0166] Δ1—left preset angle: when Re Figure 15 , Figure 16 , Figure 5 , Figure 6 ).

[0167] Δ2—right preset angle: when Rf -40°≤Δ2≤0°Figure 12 , Figure 14 , Figure 5 ).

[0168] Va1━left tine spacing: is the spacing between the left tine point A1 of the left tine line 1-2-1 on the adjacent right axis (O1, O100) and the right horn line 1-3-2 (B5-B4-B3) of the left horn on the adjacent left axis (O10, O1) in the normal direction ( Figure 11 ); that is, the spacing between the left tine point A1 of the left tine line 1-2-1 and the center A01 of the right horn line 1-3-2 of the left horn ( Figure 5 ); 0.01≤Va1≤15.

[0169] Va2━right tine spacing: is the spacing between the right tine point A11 of the right tine line 1-2-2 on the adjacent left axis (O10, O1) and the left horn line 1-3-1 (B1-B2-B3) of the left horn on the adjacent right axis (O1, O100) in the normal direction ( Figure 5 ); that is, the spacing between the right tine point A11 of the right tine line 1-2-2 and the center A02 of the left horn line 1-3-1 of the left horn ( Figure 8 ); 0.01≤Va2≤15.

[0170] Vb━right top spacing: is the spacing between the right top point C4 of the right tine line 1-2-2 on the adjacent right axis (O1, O100) and the B12-B13 arc segment of the left horn line 1-3-3 of the left horn on the adjacent left axis (O10, O1) in the normal direction ( Figure 15 ); that is, the spacing between the right top point C4 of the right tine line 1-2-2 and the center A04 of the B12-B13 arc segment of the left horn line 1-3-3 of the left horn ( Figure 5 , Figure 8 ), 0.01≤Vb≤15. Figure 5 Figure 6 Vc━left top spacing: is the spacing between the left top point C3 of the left tine line 1-2-1 on the adjacent left axis (O10, O1) and the B6-B7 arc of the right horn line 1-3-4 of the right horn on the adjacent right axis (O1, O100) in the normal direction ( ); that is, the spacing between the left top point C3 of the left tine line 1-2-1 and the center A03 of the B6-B7 arc of the right horn line 1-3-4 of the right horn (

[0171] , Figure 12 , Figure 5 , Figure 6 , Figure 1 , Figure 3 to Figure 30), 0.01≤Vc≤15. Detailed Implementation

[0172] The invention will be further described in detail below with reference to the accompanying drawings and examples:

[0173] Example 1:

[0174] like Figure 4 , Figure 17 The screening machine includes multiple swing shafts 1 driven by a power unit arranged sequentially on a screen frame. In this embodiment, the power unit is an electric motor. Multiple spider-claw-shaped top-wire screen plates 1-2 are spaced apart on each swing shaft. In this embodiment, the swing shafts 1 and the spider-claw-shaped top-wire screen plates 1-2 on adjacent swing shafts 10 and 100 are staggered. Adjacent spider-claw-shaped top-wire screen plates on the swing shaft are fitted with peg-shaped spacers 1-3 keyed to the swing shaft. The spider-claw-shaped top-wire screen plates 1-2 are connected by a sleeve portion 1-2-3 keyed to the swing shaft 1 and a connecting... The left spider claw top line 1-2-1 and the right spider claw top line 1-2-2 on both sides are formed; in this embodiment, the left spider claw top line 1-2-1 of the spider claw top line screen plate 1-2 on the swing shaft 1 extends into the gap between the right spider claw top line 1-2-2 of the adjacent spider claw top line screen plate 1-2 on the adjacent swing shaft 10 on one side, and the right spider claw top line 1-2-2 of the spider claw top line screen plate 1-2 on the swing shaft 1 extends into the gap between the left spider claw top line 1-2-1 of the adjacent spider claw top line screen plate 1-2 on the adjacent swing shaft 100 on the other side; as Figure 18 As shown, the gap between adjacent spider claw-shaped top wire screen plates is the width L1 of the screen surface gap, which is also the thickness of spacers 1-3; the thickness of the spider claw-shaped top wire screen plate is L, as shown... Figure 19 , Figure 20 , Figure 21 , Figure 5 and Figure 18 As shown;

[0175] The width L1 of the screen slot and the thickness L of the spider claw top screen plate are in the following range: 0.01≤L1-L≤10. The value of L1-L is based on the premise that the spider claw top screen plates on adjacent shafts do not jam when swinging. Its value is related to factors such as design, manufacturing materials, manufacturing process, screen roller deflection after assembly, and particle size. Generally, a smaller value is taken when the slot width L1 is small and a larger value is taken when the slot width L1 is large.

[0176] The plate-shaped spider claw top line screen piece 1-2 is adopted in the embodiment, the thickness of the plate is L, the mass of the plate-shaped spider claw top line screen piece is larger than that of the plate-shaped spider claw top line screen piece, and the mechanical strength of the plate-shaped spider claw top line screen piece is higher than that of the plate-shaped spider claw top line screen piece, which is suitable for the service environment with poor screening conditions; the collet 1-3 is adopted in the embodiment, the cross-sectional moment of inertia of the collet is large, the strength and rigidity of the assembled screen roller are high, and the screen surface is free of residual materials; the collet is connected with the oscillating shaft 1 through a key, and the screen piece and the collet are pressed by the fastener.

[0177] As shown in Figure 5 and Figure 6 , the plate-shaped spider claw top line screen piece 1-2 is composed of a left spider claw top line 1-2-1 (A13-A1-A2-A3-A4-A5-A6) and a right spider claw top line 1-2-2 (A12-A11-A10-A9-A8-A7-A6).

[0178] The left spider claw top line 1-2-1 includes a left pick point A1, a left pick hook A1-A2, a left leg A2-A3, a left top A3-A4-A5, a left shoulder A5-A6, and the left spider claw top line 1-2-1 does not exceed a left surrounding circular arc line Wza-Wzb; the left surrounding circular arc line Wza-Wzb, when Rf Figure 7 , Figure 5 is less than Rg, the center A06 of the circular arc line is on the line passing through the center O1 and the point B6, and the distance between the center A06 and the point B6 is Vc ( Figure 6 ); when Rf is greater than or equal to Rg, the center A06 of the circular arc line is on the x-axis, and the distance between the center A06 and the center O1 is Rg+Vc ( Figure 7 , Figure 5 and Figure 5 ).

[0179] The center of the left pick point A1 is on the left pick point circular arc line, the radius of the left pick point circular arc line is 0.57D≤Ra1≤0.9D ( Figure 14 );

[0180] The pick point A1 is the starting point of the left spider claw top line, the normal direction of the right horn line B5-B4-B3 of the collet on the adjacent left shaft (O10, O1) maintains a distance Va1 from the pick point A1, and 0.01≤Va1≤15 ( Figure 5 and Figure 16 );

[0181] The left pick hook A1-A2 is a concave circular arc segment, one end of which is connected to the left pick point A1, and the other end of which is tangent to or connected to the left leg A2-A3, and the radius of the left pick hook A1-A2 is 0.025D≤RA1-A2≤2D ( Figure 5 );

[0182] The left hook A1-A2 removes the screened material adhering to the right share line B5-B4-B3 on the adjacent left shaft (O10, O1) to make the area near the tine tip B3 free of material; when it is swung to the lowermost position θ-, the left hook A1-A2 rapidly throws and rebounds the screened material upward; the left hook A1-A2, which forms the right side of the V-shaped bottom of the V-shaped area, and the right shoulder A7-A6 of the right spider claw top line on the adjacent left shaft, which forms the left side of the V-shaped bottom of the V-shaped area, form a V-shaped bottom with a V-shaped tip angle > 100°, so that during the swinging from the zero position θ0 to the lowermost position θ- (i.e., the V-shaped area becomes smaller), the V-shaped bottom of the V-shaped area does not clamp the screened material, but smoothly slides upward along the V-shaped bottom (as shown in Figure 5 );

[0183] The left leg A2-A3 is an arc segment, the chord of the left leg A2-A3 coincides with the left leg line A2'-C1, the chord height is h1, h1≤0.05D, the radius is RA2-A3, RA2-A3≥0.45D, one end of the left leg A2-A3 is tangent or connected to the left hook A1-A2 at A2, and the other end is tangent or connected to the left top A3-A4-A5 at A3 (as shown in Figure 6 ); a straight line coinciding with the left leg line A2'-C1 can also be connected between the left hook A1-A2 and the left top A3-A4-A5 (as shown in Figure 7 the dashed line A2"-A3 in Figure 5 A2-A3, Figure 7 A2-A3);

[0184] The left leg A2-A3 is an important segment that forms the right side of the V-shaped area; when the spider claw top line is swung from θ- to θ0 (i.e., the V-shaped area becomes larger), the left leg A2-A3 slides, slides, blocks, and pushes the screened material, and throws and rebounds the screened material into the V-shaped area; when the spider claw top line is swung from θ0 to θ- (i.e., the V-shaped area becomes smaller), the left leg A2-A3 slides, slides, blocks, and rebounds the screened material into the V-shaped area, and compresses the screened material, forcing the screened material to change position and stratify, especially when it is swung to the lowermost position θ-, the left leg A2-A3 more rapidly throws and rebounds the screened material into the V-shaped area.

[0185] The left top A3-A4-A5 is an outward convex circular segment; it is tangent to or connected with the left leg A2-A3 at A3 and tangent to or connected with the left shoulder A6-A5 at A5; the left top A3-A4-A5 does not exceed the left circumferential arc line Wza-Wzb, and the left drop point circle arc line Wc3a-Wc3b of the left drop point C3 on the left top A3-A4-A5 does not exceed the range limited by the left large top circumferential arc line Wcda-Wcdb and the left small top circumferential arc line Wcxa-Wcxb; the center of the left large top circumferential arc line Wcda-Wcdb is at O1, and the radius is Rcd, Rcx≤Rcd≤Ra1; the center of the left small top circumferential arc line Wcxa-Wcxb is at O1, and the radius is Rcx, 0.8Ra1≤Rcx≤Rcd; the center of the left drop point circle arc line Wc3a-Wc3b is at O1, and the radius is Rc3, Rcx≤Rc3≤Rcd; the tangent of any point on the A3-A4(C3) segment of the left top with respect to the left leg line A2'-C1 has a negative angle, and the absolute value of the angle gradually increases from the A3 point (i.e., the left top A3-A4(C3) segment can only bend from left to right from the A3 point); the tangent of any point on the A5-A4(C3) segment of the left top with respect to the left shoulder line A6-C1 has a positive angle, and the angle value gradually increases from the A5 point (i.e., the left top A5-A4(C3) segment can only bend from top to bottom from the A5 point) (as shown in Figure 6 ). The left top A3-A4-A5 is: one circular arc A3-A4-A5 (as shown in Figure 6 ), two circular arcs A3-A4 (dashed line), A4-A5 (as shown in Figure 5 ), three circular arcs A3-A3', A3'-A4 (coinciding with the left circumferential arc line Wza-Wzb), A4-A5 (as shown in Figure 5 ), four circular arcs A3-A3', A3'-A4' (coinciding with the left circumferential arc line Wza-Wzb), A4'-A4, A4-A5 (dashed line) (as shown in Figure 5 ), five circular arcs A3-A3', A3'-A4' (coinciding with the left circumferential arc line Wza-Wzb), A4'-A4, A4-A5' (coinciding with the left large top circumferential arc line Wcda-Wcdb), A5'-A5 (as shown in Figure 12 ). The left top formed by the five circular arcs A3-A3', A3'-A4' (coinciding with the left circumferential arc line Wza-Wzb), A4'-A4, A4-A5' (coinciding with the left large top circumferential arc line Wcda-Wcdb), A5'-A5 (as shown in Figure 5 ) has the largest wear allowance, and thus the left top A3-A4-A5 circular segment is the best;

[0186] The left top left landing point C3 keeps a distance Vc from the normal direction of the right top line 1-3-4 of the left top of the adjacent left shaft (O10, O1), 0.01≤Vc≤15 Figure 5

[0187] When the spider claw top line swings from θ+ to θ0, or from θ0 to θ+, the left shoulder A6-A5 basically slides, slides and blocks the screened material to the left (front), and the left shoulder A6-A5 slides, slides, blocks the screened material, and backhoes, throws and rebounds the screened material to the V-shaped area, and compresses the screened material, forces the screened material to change position and stratify, especially when it swings to the lower limit θ-, the left shoulder A6-A5 throws and rebounds the screened material more rapidly.

[0188] The left shoulder A5-A6 is a circular arc segment, the chord of the left shoulder A5-A6 coincides with the left shoulder line A6-C1, the chord height is h3, h3≤0.05D, the radius is RA5-A6, RA5-A6≥0.45D, one end of the left shoulder A5-A6 is tangent to or connected with the left top A3-A4-A5 at A5, and the other end is tangent to or connected with the right spider claw top line 1-2-2 at A6 (such as Figure 6 ) ; the connection between the left top A3-A4-A5 and the right spider claw top line 1-2-2 can also be a straight line coinciding with the left shoulder line A6-C1 (such as Figure 7 A5-A6 of Figure 5 A5-A6 of Figure 8 A5-A6) ;

[0189] When the spider claw top line swings from θ+ to θ0, or from θ0 to θ+, the left shoulder A6-A5 basically slides, slides and blocks the screened material to the left (front), and the left shoulder A6-A5 slides, slides, blocks the screened material, and backhoes, throws and rebounds the screened material to the V-shaped area, and compresses the screened material, forces the screened material to change position and stratify, especially when it swings to the lower limit θ-, the left shoulder A6-A5 throws and rebounds the screened material more rapidly.

[0190] ​The right spider claw top line 1-2-2 includes a right tine point A11, a right tine A11-A10, a right leg A10-A9, a right arm A9-A8, a right top A8-A7, and a right shoulder A7-A6. The right spider claw top line 1-2-2 does not exceed the right surrounding arc line Wya-Wyb. When Re Figure 9 , Figure 5 ), when Re≥Rg, the center A05 of the right surrounding arc line is on the x-axis, and the distance from the center O1 is Rg+Vb (such as Figure 8 ), and the radius Rwy of the right surrounding arc line is D (such as Figure 9 , Figure 5 , Figure 5 ).

[0191] The center of the right tine point A11 is on the right tine arc line, and the radius of the right tine arc line is 0.57D≤Ra2≤0.9D (such as Figure 11 );

[0192] The right tine point A11 is the starting point of the right spider claw top line. The tine point A11 and the adjacent right shaft (O1, O100) are separated by a normal line of the left coupler line B1-B2-B3 by a distance Va2, 0.01≤Va2≤15 (such as Figure 5 and Figure 10 );

[0193] The right tine A11-A10 is a concave arc segment, one end of which is connected to the left tine point A11, and the other end is tangent or connected to the right leg A10-A9, and the radius thereof is 0.025D≤RA1-A2≤2D (such as Figure 5 );

[0194] The right tine A11-A10 removes the screened material adhering to the adjacent right shaft (O1, O100) on the left coupler line B1-B2-B3, and makes the vicinity of the tine B3 free of material. When it is placed at the lower extreme position θ-, the right tine A11-A10 rapidly throws and rebounds the screened material upward; the right tine A11-A10, which constitutes the left side of the V-shaped bottom of the V-shaped area, and the right shoulder A7-A6 of the right spider claw top line on the adjacent right shaft, which constitutes the right side of the V-shaped bottom of the V-shaped area, form a V-shaped bottom with a V-shaped angle >100°, so that during the process of swinging from the zero position θ0 to the upper extreme position θ+ (i.e., the V-shaped area changes from large to small), the screened material on the V-shaped bottom of the V-shaped area smoothly slides upward along the right tine A11-A10, without biting and clamping the screened material on the V-shaped bottom of the V-shaped area (such as Figure 5 );

[0195] The right leg A10-A9 is an arc segment. The chord of the right leg A10-A9 coincides with the right leg line A10'-C2. The chord height is h2, h2≤0.05D, and the radius is RA10-A9, RA10-A9≥0.45D. One end of the right leg A10-A9 is tangent to or connected to the right hook A11-A10 at A10, and the other end is tangent to or connected to the right arm A9-A8 at A9 (e.g., Figure 8 The line connecting the right hook A11-A10 and the right arm A9-A8 can also be a straight line coinciding with the right leg line A10'-C2 (e.g., Figure 9 The dashed lines A10″-A9, Figure 5 A10-A9, Figure 5 (A10-A9)

[0196] The right leg A10-A9 is an important segment constituting the left side of the V-shaped zone. When the spider claw top line swings from θ+ to θ0 (i.e., the V-shaped zone increases in size), the right leg A10-A9 slides, cuts, and blocks the material being screened, and bounces, throws, and ejects the material being screened into the V-shaped zone. When the spider claw top line swings from θ0 to θ+ (i.e., the V-shaped zone decreases in size), the right leg A10-A9 slides, cuts, and blocks the material being screened, and bounces, throws, and ejects the material being screened into the V-shaped zone, compressing the material being screened and forcing it to change position and stratify. In particular, when it swings to the lower extreme position θ-, the right leg A10-A9 more rapidly throws and ejects the material being screened into the V-shaped zone.

[0197] The right arm A9-A8 is an outwardly convex arc segment. One end of the right arm A9-A8 is tangent to or connected to the right leg A10-A9 at A9, and the other end is tangent to or connected to the right hip A8-A7 at A8 (e.g., Figure 5 With the right leg line A10'-C2 as the initial side, the angle between the tangent at any point on the right arm A9-A8 and the right leg line A10'-C2 is a positive angle, and its value gradually increases from point A9 (i.e., the right arm A9-A8 can only bend from right to left starting from point A9). Figure 9 Connecting the right leg A10-A9 and the right top A8-A7 is: an arc A9-A8 (e.g. Figure 8 , Figure 8 ), two circular dashed lines A9-A8′ and A8′-A8 (as shown) Figure 8 ), three arcs A9-A9′, A9′-A8′ (coinciding with the right arc Wya-Wyb), A8′-A8 (as Figure 5 ); from A9-A9′, A9′-A8′ (coinciding with the right-side arc Wya-Wyb), A8′-A8 (as Figure 5 The right arm, which is composed of three arcs, has the largest wear margin, so the A9-A8 arc segment of the right arm is the best choice.

[0198] Right arm A9-A8 is also an important segment of the left side of the V-shaped area; when the top line of the spider claw swings from θ+ to θ0 (i.e. the V-shaped area becomes smaller), the right arm A9-A8 slides, slides, blocks and screens the material, and the screened material is back to the V-shaped area, and the screened material is thrown, ejected and ejected; when the top line of the spider claw swings from θ0 to θ+ (i.e. the V-shaped area becomes smaller), the right arm A9-A8 slides, slides, blocks and screens the material, and the screened material is back to the V-shaped area, and the screened material is thrown, ejected and ejected, and the screened material is compressed, forced to change position and layered, especially when it is swung to the lower limit θ-, the right leg A10-A9 more rapidly throws, ejects and ejects the screened material into the V-shaped area.

[0199] Right top A8-A7 is an outwardly convex circular arc segment, one end of right top A8-A7 is tangent or connected with right arm A9-A8 at A8, and the other end is tangent or connected with right shoulder A7-A6 at A7 (such as Figure 8 ); Right top A8-A7 does not exceed right circumferential arc line Wya-Wyb, right drop point C4 on right top A8-A7 does not exceed the range limited by right large top circumferential arc line Wbda-Wbdb and right small top circumferential arc line Wbxa-Wbxb; the center of right large top circumferential arc line Wbda-Wbdb is at O1, and the radius is Rbd, Rbx≤Rbd≤Ra2, the center of right small top circumferential arc line Wbxa-Wbxb is at O1, and the radius is Rbx, 0.8 Ra2≤Rbx≤Rbd, the center of right drop point arc line Wc4a-Wc4b is at O1, and the radius is Rc4, Rbx≤Rc4≤Rbd (such as Figure 9 , Figure 5 , Figure 9 ); Right top A8-A7 connected between right arm A9-A8 and right shoulder A7-A6 is: one circular arc A8-A7 (such as Figure 8 A8-A7 coinciding with right large top circumferential arc line Wbda-Wbdb, Figure 5 A8-A7), two circular arcs A8-A8' and A8'-A7 (such as Figure 5 A8-A7 coinciding with right large top circumferential arc line Wbda-Wbdb and A7"-A7' (such as Figure 15 ); Right top composed of one circular arc A8-A7 (such as Figure 5 )coinciding with right large top circumferential arc line Wbda-Wbdb has the largest wear allowance, so the right top A8-A7 arc segment is preferred;

[0200] Right drop point C4 of right top A8-A7 keeps a distance Vb from the normal direction of left top line 1-3-3 of the adjacent right side shaft (O1, O100) of the harrow-shaped spacer, 0.01≤Vb≤15 ( Figure 5 ).

[0201] Right top A8-A7 combing, sliding, shifting, throwing, ejecting the screened material.

[0202] Right shoulder A7-A6 is a concave circular segment, one end of right shoulder A7-A6 is connected with right top A8-A7 at A7, the other end of right shoulder A7-A6 is connected with left spider claw top line 1-2-1 at A6, and right shoulder A7-A6 is tangent to or connected with right shoulder line A6-C2 at A6; the angle between the tangent line of any point on right shoulder A7-A6 and right shoulder line A6-C2 is a positive angle, and the value of the angle gradually increases from A6 point (i.e. right shoulder A7-A6 can only bend from A6 point from bottom to top), the concave circular segment of right shoulder A7-A6 is a concave circular segment, the radius of right shoulder A7-A6 is RA7-A6, and RA7-A6≥0.4D (such as Figure 6 ); the line connecting right top A8-A7 and left spider claw top line 1-2-1 can also be a straight line A7-A6 (such as Figure 7 dotted line A7-A6) connected with left spider claw top line 1-2-1 at A6 point and connected with right shoulder line A6-C2, and connected with right top A8-A7 at A7 point; the straight line right shoulder seems to increase the wear allowance, but the increase of the wear allowance in the vicinity of A7 point is not much, and a larger wear arc will appear at A7 point earlier, which is not conducive to throwing the material, and the concave circular segment of right shoulder is a reverse wear curve which estimates the possible wear state of right shoulder, and promotes the screened material to produce violent rolling when throwing the material, so the concave circular segment of right shoulder A7-A6 is the best.

[0203] When the top line of the spider claw swings from θ0 to θ+ (i.e. the V-shaped area becomes smaller), the right shoulder A7-A6 combs, slides, slips, blocks, throws and ejects the screened material to the left (front), and the concave arc facilitates the screened material to move along A6 to A7 while producing violent tumbling and strong turbulence in the V-shaped area, which is more conducive to compressing the screened material and forcing the screened material to change position and stratify. In particular, when it swings to the uppermost position θ+, the right shoulder A7-A6 throws and ejects the screened material to the left (front) more rapidly, and at this time, the right shoulder A7-A6 on the right side and the right hook A11-A10 on the left side form the V bottom of the V-shaped area, and the included angle between the tangent lines at the intersection point of the two is > 100°, so that the screened material smoothly slides upward along the two sides of the V bottom of the V-shaped area, and the V bottom of the V-shaped area does not clamp the screened material; when the top line of the spider claw swings from θ+ to θ0 (i.e. the V-shaped area becomes larger), the right shoulder A7-A6 combs, slides, slips and blocks the screened material to the left (front); when the top line of the spider claw swings from θ0 to θ-, the right shoulder A7-A6 back hoes the screened material, and when it swings to the lowermost position θ-, part of the right shoulder A7-A6 forms the left side of the V bottom, and it and the left hook A1-A2 on the right side form the V bottom of the V-shaped area, and the included angle between the tangent lines at the intersection point of the two is > 100°, so that the screened material smoothly slides upward along the two sides of the V bottom of the V-shaped area, and the V bottom of the V-shaped area does not clamp the screened material; when the top line of the spider claw swings from θ- to θ0, the right shoulder A7-A6 combs, slides and slips the screened material to the left (front).

[0204] The intersection point of the left spider claw top line 1-2-1 and the right spider claw top line 1-2-2 is the valley point A6, the coordinate value of the valley point A6 on the x-axis offset from the y-axis is the valley point offset E, -0.23D≤E≤0.15D, and the coordinate value of the valley point A6 on the y-axis is the valley point height H, 0.35*max(Ra1, Ra2)≤H≤0.75max(Ra1, Ra2); in order to meet the requirements of the forming process and heat treatment process (flame cutting, plasma cutting, water jet cutting, wire cutting, laser cutting, casting, extrusion, winding, etc.), the valley point A6 is connected by a circular arc with a radius RA6'-A6"≤0.25D (such as Figure 8 、 Figure 9 、 Figure 5 、 Figure 18 the dashed line A6'-A6" in the figure).

[0205] The front end of the left spider claw top line 1-2-1 is provided with a left bottom line A1-A13, and the front end of the right spider claw top line 1-2-2 is provided with a right bottom line A11-A12;

[0206] The bottom lines A13-A1 and A12-A11 are circular arcs with a radius ≥D or straight lines, such as Figure 4straight line A1-A13' (dotted line), straight line A11-A12' (dotted line) in Fig. 1; the bottom lines A13-A1 and A12-A11 in this embodiment are circular arcs with a radius of 3D, as shown in Fig. 1. Figure 5

[0207] The spacer sleeve 1-3 in this embodiment is a harrow-shaped spacer sleeve, which is used to ensure the size L1 of the gap between the top line screen piece and the spider-shaped claw (as shown in Fig. 1) and to avoid accumulation of screened material above the swing shaft; the harrow-shaped spacer sleeve comprises a right harrow line 1-3-2 (as shown by B5-B4-B3 in Fig. 1), a left harrow line 1-3-1 (as shown by B1-B2-B3 in Fig. 1), a left top-avoiding line 1-3-3 (as shown by B10-B11-B12-B13 in Fig. 1), a right top-avoiding line 1-3-4 (as shown by B6-B7-B8-B9 in Fig. 1), and three hub rim arcs with a radius of Rg. Figure 5 Figure 5 Figure 8 Figure 9 Figure 5 Figure 6 Figure 7 Figure 5 Figure 5

[0208] The right harrow line 1-3-2 is a circular arc with a center at A01, a radius of D, and tangent to the right harrow line base circle with a radius of Rd1 at point B4 (as shown in Fig. 1) ; Figure 5

[0209] The left harrow line 1-3-1 is a circular arc with a center at A02, a radius of D, and tangent to the left harrow line base circle with a radius of Rd2 at point B2 (as shown in Fig. 1) ; Figure 8

[0210] The left top-avoiding line 1-3-3: when Re Figure 9 Figure 5 ) ; when Re≥Rg, the left top-avoiding line 1-3-3 is a hub rim arc with a center at O1 and a radius of Rg (as shown by B10-B12(B11)-B13 in Fig. 1) ; the preset angle Δ1 is a central angle with a vertex at the center O1, a radius of Re, and a starting side O1-B12, and 0°≤Δ1≤40°; Figure 6

[0211] ​​​​​​​​​​​​​​When Rf < Rg, the right top-avoiding line 1-3-4 is composed of three mutually tangent circular arcs: one is a circular arc B6-B7 with a center at A03 and a radius of D, one is a circular arc B7-B8 with a center at O1, a radius of Rf, and a preset angle of Δ2, which coincides with the base circle of the right top-avoiding line, B7 and B8 are tangent points, and one is a circular arc B8-B9 with a center at A08 and a radius of D (as shown in Figure 7 , Figure 5 ); when Rf ≥ Rg, the right top-avoiding line 1-3-4 is an axial hub arc B6-B7 (B8)-B9 (as shown in Figure 5 ) with a center at O1 and a radius of Rg, and the preset angle of Δ2 is a central angle with a vertex at the center O1, a radius of Rf, and a starting side of O1-B7, -40° ≤ Δ2 ≤ 0°;

[0212] The intersection of the left horn line 1-3-1 and the right horn line 1-3-2 is the horn tip point B3, the line connecting the horn tip point B3 and the center O1 is the tip center line B3-O1, the distance from the horn tip point B3 to the center O1 is the tip center distance J, 0.6H ≤ J ≤ 1.3H, the angle between the tip center line B3-O1 and the y-axis is the deflection angle φ, -3° ≤ φ ≤ 5° (as shown in Figure 5 );

[0213] The radius of the circle tangent to the right horn line 1-3-2 (B5-B4-B3) at the B4 point (as shown in Figure 5 ) is the right horn line base circle radius Rd1, Rd1 = D-Ra1-Va1.

[0214] The radius of the circle tangent to the left horn line 1-3-1 (B1-B2-B3) at the B2 point (as shown in Figure 8 ) is the left horn line base circle radius Rd2, Rd2 = D-Ra2-Va2.

[0215] The base circle radius tangent to the left top-avoiding line 1-3-3 (as shown in Figure 5 B10-B11-B12-B13, Figure 6 B10-B11-B12-B13) at the B12 and B11 points is the left top-avoiding line base circle radius Re, Re = D-Rc4-Vb.

[0216] The base circle radius tangent to the right top-avoiding line 1-3-4 (as shown in Figure 5 B6-B7-B8-B9, Figure 14 B6-B7-B8-B9) at the B7 and B8 points is the right top-avoiding line base circle radius Rf, Rf = D-Rc3-Vc.

[0217] The axial hub radius Rg is the common radius of the spider claw top line filter piece axial hub and the spacer axial hub arc, 0.25D ≤ Rg ≤ 0.7D (as shown in Figure 15 ).

[0218] In the process of the spider claw top line swinging, the bottom foot lines A1-A13 of the left spider claw top line on the right shaft (O1, O100) and the right shoe line B5-B4-B3 of the spacer on the left shaft (O10, O1) (as shown in Figure 16 , Figure 10 , Figure 11 ) always form a triangle-like area with the upper small and the lower large, so that the screened material of the left pick point A1 of the left spider claw top line and the right pick point A11 of the right spider claw top line can smoothly fall off to avoid being stuck. Figure 12 Figure 5 Figure 10 The left pick point A1 and the right pick point A11 are the starting points of the left spider claw top line and the right spider claw top line respectively (as shown in

[0219] When the spider claw top line swings to the upper extreme position θ+ and the lower extreme position θ-, the left pick point A1 and the right pick point A11 should cross each other at the point of the shoe tip B3 or fall near the point of the shoe tip B3, so that the adjacent area of the shoe tip point B3 of the shoe-shaped spacer on the adjacent shaft is not accumulated with the screened material and the screen surface is not left with the screened material. Figure 16

[0220] As shown in Figure 10 , Figure 11 , when the spider claw top line swings to the upper extreme position θ+ and the lower extreme position θ-, the left pick point A1 and the right pick point A11 should cross each other at the point of the shoe tip B3 or fall near the point of the shoe tip B3, so that the adjacent area of the shoe tip point B3 of the shoe-shaped spacer on the adjacent shaft is not accumulated with the screened material and the screen surface is not left with the screened material.

[0221] When the spider claw top line screen piece swings around the rotation center O1, the included angle between the x-axis when swinging to the upper extreme position θ+ and the lower extreme position θ- is the full swing angle Ψ, Ψ≤180°, and the full swing angle Ψ=110° in the embodiment. When the screen is inclined at a negative angle (the inclination angle αs is negative when the screen surface is upwardly inclined) or zero (i.e. horizontal), the full swing angle Ψ can be appropriately taken as a larger value to enhance the conveying capacity of the screen surface; when the screen is inclined at a positive angle (the inclination angle αs is positive when the screen surface is downwardly inclined), the full swing angle Ψ can be appropriately taken as a smaller value; when the swing frequency per minute and other mechanical parameters are constant, the larger the value of Ψ, the greater the power consumption.

[0222] As shown in Figure 12 , when the x-axis of the spider claw top line is counterclockwise upwardly inclined to the position with an included angle of +Ψ / 2 between the x-axis, the position is the upper extreme position θ+, at which the right spider claw top line is at the uppermost and the left spider claw top line is at the lowermost; at this time, the right pick hook of the right spider claw top line on the left shaft O10 and the right shoulder of the right spider claw top line on the right shaft O1 form a V bottom, and the included angle between the tangent lines at the intersection point is >100°.

[0223] As shown in Figure 13 ​​​As shown in the figure, when the right pick-up point A11 of the adjacent right spider claw top line on the adjacent right shaft O1 is turned to coincide with the x-axis, the B2 point of the left horn line 1-3-1 of the spacer sleeve on the adjacent left shaft O10 also coincides with the x-axis, and the distance between the right pick-up point A11 and the B2 point on the x-axis is the right pick-up interval Va2, and Ra2+Va2+Rd2=D, 0.01≤Va2≤15.

[0224] As shown in the figure, when the right pick-up point A11 of the adjacent right spider claw top line on the adjacent right shaft O1 is turned to coincide with the x-axis, the B2 point of the left horn line 1-3-1 of the spacer sleeve on the adjacent left shaft O10 also coincides with the x-axis, and the distance between the right pick-up point A11 and the B2 point on the x-axis is the right pick-up interval Va2, and Ra2+Va2+Rd2=D, 0.01≤Va2≤15. Figure 14 As shown in the figure, when the left pick-up point C3 of the left spider claw top line 1-2-1 of the adjacent right spider claw top line on the adjacent right shaft O1 is turned to coincide with the x-axis, the B7 point of the right top line 1-3-4 of the spacer sleeve on the adjacent left shaft O10 also coincides with the x-axis, and the distance between the left pick-up point C3 and the B7 point on the x-axis is the left pick-up interval Vc, and Rf+Vc+Rc3=D, 0.01≤Vc≤15.

[0225] Figure 15 As shown in the figure, when the x-axis of the spider claw top line is turned to coincide with the X-axis, the position is zero position θ0.

[0226] As shown in the figure, when the right pick-up point A11 of the adjacent right spider claw top line on the adjacent right shaft O1 is turned to coincide with the x-axis, the B2 point of the left horn line 1-3-1 of the spacer sleeve on the adjacent left shaft O10 also coincides with the x-axis, and the distance between the right pick-up point A11 and the B2 point on the x-axis is the right pick-up interval Va2, and Ra2+Va2+Rd2=D, 0.01≤Va2≤15. Figure 16 As shown in the figure, when the right pick-up point A11 of the adjacent right spider claw top line on the adjacent right shaft O1 is turned to coincide with the x-axis, the B2 point of the left horn line 1-3-1 of the spacer sleeve on the adjacent left shaft O10 also coincides with the x-axis, and the distance between the right pick-up point A11 and the B2 point on the x-axis is the right pick-up interval Va2, and Ra2+Va2+Rd2=D, 0.01≤Va2≤15.

[0227] Figure 21 As shown in the figure, when the right pick-up point A11 of the adjacent right spider claw top line on the adjacent right shaft O1 is turned to coincide with the x-axis, the B2 point of the left horn line 1-3-1 of the spacer sleeve on the adjacent left shaft O10 also coincides with the x-axis, and the distance between the right pick-up point A11 and the B2 point on the x-axis is the right pick-up interval Va2, and Ra2+Va2+Rd2=D, 0.01≤Va2≤15.

[0228] The values of Va1 and Va2 are determined by the fact that the pick-up hooks of the adjacent spider claw top line on the adjacent shaft can clean the left and right horn lines of the horn-shaped spacer sleeve without collision, and the values are related to design, manufacturing materials, manufacturing process, deflection of the assembled screen roller, screen size, etc. Generally, small values are taken for small slit widths L1, and large values are taken for large slit widths L1.

[0229] The values of Vb and Vc are determined by the fact that the left and right tops of the adjacent spider claw top line on the adjacent shaft do not collide with the horn-shaped spacer sleeve when it is turned, and the values are related to design, manufacturing materials, manufacturing process, deflection of the assembled screen roller, screen size, etc. Generally, small values are taken for small slit widths L1, and large values are taken for large slit widths L1. ​​

[0230] As Figure 22 shown, when the x-axis of the spider claw top line is clockwise downward to the angle between the X-axis is -Ψ / 2 swing angle position is the lower position θ-; At this time, the left claw is the highest, and the right claw is the lowest. At this time, the right shoulder of the right spider claw top line on the left axis O10 of the spider claw top line and the left hook of the left spider claw top line on the right axis O1 of the spider claw top line form a V bottom, and the included angle of the tangent at the intersection point is >100°.

[0231] The spider claw top line of the spider claw top line screen piece: the x-axis is the initial edge, the left shoulder angle is λ, -25°≤λ≤10°; the x-axis is the initial edge, the right shoulder angle is μ, -10°≤μ≤25°, │λ│+│μ│≤50°; the left angle is ε, 45°≤ε≤85°; the right angle is ζ, 45°≤ζ≤85°; the right intersection angle is α, 90°≤α≤100°+│μ│; the left intersection angle is β, 90°≤β≤100°+│λ│; the relationship between each angle is α=ε+(│λ│+│μ│), β=ζ+(│λ│+│μ│).

[0232] Example 2:

[0233] As Figure 23 , Figure 24 , Figure 25 and Figure 26 shown, the spacer 1-3 can adopt a circular ring spacer, which is convenient to manufacture and low in cost, but will accumulate material on the spacer below the valley point B6. The cross-sectional moment of inertia of the circular ring spacer is smaller than that of the plough-shaped spacer, so the strength and rigidity of the assembled screen roller are small. The spider claw top line screen piece 1-2 adopts a plate-shaped plate claw type spider claw, that is, the middle part of the whole plate-shaped plate type spider claw top line screen piece in Example 1 is processed into a plate-shaped plate claw type spider claw top line screen piece. The mass of the plate-shaped plate claw type spider claw top line screen piece is lighter than that of the plate-shaped plate type spider claw top line screen piece, and the mechanical strength is lower than that of the plate-shaped plate type spider claw top line screen piece, but under the condition that the strength and rigidity of the screen roller are the same, the plate-shaped plate claw type spider claw top line screen piece can assemble a wider screen roller. The screening principle and function of the plate-shaped plate claw type spider claw are the same as those of the plate-shaped plate type spider claw in Example 1.

[0234] Example 3:

[0235] As Figure 2 and Figure 27 shown, the cross section of the whole plate type spider claw top line screen piece in Example 1 and the whole plate claw type spider claw top line screen piece in Example 2 is set to a T cross section. Although the manufacturing cost of the T cross section increases, it is more beneficial to the screening of dry materials, and the mass is also lighter. Under the condition that the strength and rigidity of the screen roller are the same, the T cross section spider claw top line screen piece can assemble a wider screen roller, but it will produce sticky material when screening sticky materials, and the screened material will remain on the screen piece.

[0236] Example 4:

[0237] As shown in Figure 28 , Figure 29 , Figure 30 , Figure 32 , Figure 33 and 31 , the plate-shaped plate spider claw top line screen 1-2 is made of a separate plate-shaped plate spider claw top line screen and a separate plate-shaped plate spider claw top line screen, which are respectively integrated with a plow-shaped spacer sleeve (machined integrally as a whole) and installed on the swing shaft, and combined left and right to form a plate-shaped plate spider claw top line screen surface with the same structure and same function as example 1.

[0238] Example 5:

[0239] As shown in Figure 34 and Figure 36 , Figure 37 and 35 , the separate plate-shaped plate spider claw top line screen and the separate plate-shaped plate spider claw top line screen in example 4 are respectively made into plate-shaped plate claw type left and right half spider claw top line screens. The mass of the plate-shaped plate claw type half spider claw top line screen is lighter than that of the plate-shaped plate spider claw top line screen, and the mechanical strength of the plate-shaped plate claw type half spider claw top line screen is lower than that of the plate-shaped plate spider claw top line screen, but under the condition that the strength and rigidity of the screen roller are the same, the plate-shaped plate claw type half spider claw top line screen can be assembled into a wider screen roller.

[0240] Example 6:

[0241] As shown in Figure 39 , Figure 40 and 38 , the spider claw top line screen 1-2 is set as a plate-shaped plate claw type half spider claw top line screen with dovetail joints at the joint of the shaft sleeve part, which has integrated the plow-shaped spacer sleeve with the spider claw top line, added dovetail joints at the joint of the shaft sleeve part and welded, and is divided into a plate-shaped plate claw type left half spider claw top line screen 1-2-1 and a plate-shaped plate claw type right half spider claw top line screen 1-2-2, which has high reliability, high material utilization rate, light screen quality, low cost, and under the condition that the strength and rigidity of the screen roller are the same, can be assembled into a wider screen roller.

[0242] Example 7:

[0243] As shown in Figure 41 ,Figure 42 and Figure 43 As shown, the plate-shaped, dovetail-jointed, semi-spider-claw top wire screen plate of Example 6 is modified by adding two reinforcing rods with dovetails at both ends between the bushing and the spider claw. This produces a plate-shaped, dovetail-jointed, dovetail-jointed, and dovetail-jointed reinforcing rod between the bushing and the spider claw, resulting in a plate-shaped, dovetail-jointed, semi-spider-claw top wire screen plate. This increases the strength and rigidity of the spider claw, makes the screen plate lighter, increases material utilization, and lowers cost. It is suitable for harsh screening environments, just like the plate-shaped, semi-spider-claw top wire screen plate. Under the same strength and rigidity of the screen roller, a wider screen roller can be assembled. However, when screening sticky and wet materials, a small amount of the screened material will adhere to the top of the reinforcing rod, resulting in a small amount of screened material remaining on the screen surface.

[0244] Example 8:

[0245] like Figure 44 , Figure 45 and Figure 46 As shown, the spider claw top wire screen 1-2 is configured into a spiral-shaped spider claw top wire screen using a rectangular cross-section profile. The spiral-shaped spider claw top wire screen integrates the pegboard-shaped spacer and the spider claw top wire into one piece, which is lightweight, has high material utilization, and low cost, making it suitable for general light screening.

[0246] Example 9:

[0247] like Figure 47 , Figure 48 , Figure 49 and Figure 50 As shown, the spider claw top wire screen 1-2 is configured as a semi-spider claw top wire screen shaped by rotation using a rectangular cross-section profile. The semi-spider claw top wire screen shaped by rotation integrates the pegboard-shaped spacer and the spider claw top wire into one piece. It is manufactured by dividing the screen into two halves: a left half spider claw top wire screen 1-2-1 and a right half spider claw top wire screen 1-2-2, which is more convenient to manufacture, has a lighter screen weight, higher material utilization rate, and lower cost, making it suitable for general light screening.

[0248] Example 10:

[0249] like Figure 51 and Figure 52 As shown, the semi-spider claw top wire screen sheet formed by rotatable winding in Example 9 is made by adding a dovetail tenon to the bushing joint and welding it to produce a semi-spider claw top wire screen sheet with a dovetail tenon at the bushing joint formed by rotatable winding, which has better reliability.

[0250] Example 11:

[0251] like ​ and ​The sleeve part joint of the half spider claw top line screen piece of the rotary formed sleeve part joint with dovetail is connected with the spider claw, and the two ends of the reinforcing support rod with dovetail are firmly welded, so that the strength and rigidity of the claw are higher, the screen piece is light in quality, high in material utilization rate, and low in cost, and is suitable for the service environment with relatively poor screening conditions, but when screening sticky materials, a small amount of screened materials will be attached to the reinforcing support rod, so that a small amount of screened materials will be left on the screen surface.

[0252] The screening movement process, basic principle and effect of the application are briefly summarized as follows:

[0253] The intermediate swing shaft drives other swing shafts with gear meshing to swing synchronously under the driving of the gear crank rocker swing output mechanism. The spider claw top line group of the screen surface goes through four stages, i.e. from θ+ to θ0, from θ0 to θ-, from θ- to θ0, and from θ0 to θ+, to complete a swing screening cycle. The spider claw top line group always moves in opposite directions and crosses each other, and thus the screening action is repeated.

[0254] In the four stages of the spider claw group, a plane or curved surface screen surface composed of the straight line group and the curved line group on the spider claw top line group appears, which is a V-shaped space floating three-dimensional slot screen surface that continuously changes in position and position angle, and is repeated from large to small or from small to large.

[0255] This V-shaped space floating three-dimensional slot screen surface forces the shape of the material layer on the screen to change periodically, forces the irregular and violent exchange of spatial positions between the cohesive groups and particles in the material layer on the screen, causes the cohesive groups and particles in the material layer to collide, rub and abrade each other, and the particles replaced to the near area of the screen surface, which are equal to or smaller than the screen gap width, will be subjected to strong mechanical force and pass through the screen.

[0256] The position and position angle of the straight line screen surface and the curved screen surface formed by the left and right spider claw top line groups on the adjacent shafts of the V-shaped space floating three-dimensional slit screen surface of the class are periodically changed, and the speed and acceleration on the left and right spider claw top lines are also periodically changed. For the cohesive mass and particles in the screened material layer on the screen, the dependent displacement vector, velocity vector, and acceleration vector of each point on the left and right spider claw top lines are different and also periodically changed, causing the displacement vector, velocity vector, and acceleration vector of the cohesive mass and particles in the screened material layer on the screen to periodically change. The size of the cohesive mass and particles in the screened material layer is different in response to the change of the dependent displacement vector, velocity vector, and acceleration vector. The larger the size of the cohesive mass and particles, the greater the response to the change of the dependent displacement vector, velocity vector, and acceleration vector, so that the cohesive mass and particles of different sizes at different positions in the screened material on the screen obtain different sizes and directions of displacement vector, velocity vector, and acceleration vector, causing the cohesive mass and particles in the screened material to produce different sizes and directions of displacement vector difference, velocity vector difference, and acceleration vector difference. The greater the normal vector of the cohesive mass and particles of the screened material to the screen surface, the greater the impact of the cohesive mass and particles of the screened material to the screen surface, the farther the projection or ejection of the cohesive mass and particles of the screened material in the V-shaped screen surface, and the more intense the projection, ejection, tumbling, collision, shearing, rubbing, and grinding movements of the cohesive mass and particles of the screened material in the V-shaped area. The greater the tangential vector of the cohesive mass and particles of the screened material to the screen surface, the more intense the tumbling, collision, shearing, rubbing, and grinding movements of the cohesive mass and particles of the screened material along the tangential direction of the V-shaped screen surface. The response of small particle screened material to the change of the dependent displacement vector, velocity vector, and acceleration vector is relatively small, and the small particle screened material is more driven to the screen surface. All these force the cohesive mass and particles in the screened material layer on the screen to make irregular and intense projection, ejection, tumbling, collision, shearing, rubbing, and grinding movements in the V-shaped space, break the cohesive link between the closely cohesive mass and particles of fine and wet sticky material, separate and scatter the cohesive mass, loosen the wet material, force the screened material to be layered, and drive the small particle screened material to the screen surface. The particles smaller than or equal to the screen hole size obtain strong screening power and are screened.

[0257] During each oscillation screening cycle, the screen surface on the left (front) side of the V-shaped area always throws, slides and back-pulses the screened material on the screen surface to the rear; the screen surface on the right (rear) side of the V-shaped area always blocks the material thrown, slid and back-pulsed by the screen surface on the left (front) side of the V-shaped area in the V-shaped area; the right spider claw top line group on the oscillation shaft always throws and slides the screened material to the left (front), and the left spider claw top line group on the oscillation shaft always slides and pushes the screened material to the left (front). This is beneficial to increase the contact time of the screened material on the screen surface, increase the frequency of the contact of the sieveable particles with the screen surface and the probability of sieving, increase the sieved amount and the screening efficiency, and also realizes the migration and transportation of the screened material on the screen from the feeding end (rear end) to the discharging end (front end).

[0258] During the entire screening process, the included angle between the tangent lines of the intersection points of the spider claw top lines between any two adjacent oscillation shafts is greater than 90º at any time, and the material blocked in the gaps of the spider claw top lines between the adjacent two shafts is always forced to be thrown outwards, so that the entire screening process is carried out in a state that the screen holes are always basically unblocked and the effective screening area is always basically unchanged, ensuring that the entire screening process is always continuous, normal and not deteriorated.

[0259] During the entire screening process, the spider claw top line group always cuts into the layer of the screened material on the screen in the manner of raking and sliding, and the change of the size of the V-shaped area of the screen surface always forces the irregular and violent exchange of the space positions between the cohesive groups and particles in the layer of the screened material, and the cohesive groups and particles in the layer of the screened material make irregular and violent throwing, bouncing, tumbling, bumping, shearing, rubbing and grinding movements in the V-shaped space, which makes the screened material mainly in the forced sieving mode and also in the non-forced sieving mode throughout the entire screening process, so that the difficult-to-screen particles with a size of (0.75 ~ 1) x L1 (L1: gap width) can also be sieved smoothly. Therefore, the space floating three-dimensional gap screen surface has higher screening efficiency, greater sieved amount and greater screening processing capacity per unit area of the screen surface.

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Claims

1. A screening machine, comprising a plurality of swing shafts arranged in sequence on a screen frame, each of the swing shafts being sleeved with a plurality of screen sheets at intervals, a spacer sleeve (1-3) being arranged between adjacent screen sheets, and the screen sheets on adjacent swing shafts being arranged in a staggered manner; the center of the swing shafts is O1, and the distance between the center lines of adjacent swing shafts passing through the center O1 is D; characterized in that: the screen sheet is a spider claw top line screen sheet (1-2) comprising a left spider claw top line (1-2-1) of a left part and a right spider claw top line (1-2-2) of a right part; the left spider claw top line (1-2-1) of the spider claw top line screen sheet (1-2) on each swing shaft extends into the gap between the adjacent two right spider claw top lines (1-2-2) on the adjacent swing shaft, and the right spider claw top line (1-2-2) of the spider claw top line screen sheet (1-2) on each swing shaft extends into the gap between the adjacent two left spider claw top lines (1-2-1) on the adjacent swing shaft; the left spider claw top line (1-2-1) comprises a left pick tip point (A1), a left pick hook (A1-A2), a left leg (A2-A3), a left top (A3-A4-A5), and a left shoulder (A5-A6), and is defined within the range of a left enclosing circular arc line (Wza-Wzb); the center of the left enclosing circular arc line (Wza-Wzb) is A06, and the radius thereof is Rwz, Rwz=D; the right spider claw top line (1-2-2) comprises a right pick tip point (A11), a right pick hook (A11-A10), a right leg (A10-A9), a right arm (A9-A8), a right top (A8-A7), and a right shoulder (A7-A6), and is defined within the range of a right enclosing circular arc line (Wya-Wyb); the center of the right enclosing circular arc line (Wya-Wyb) is A05, and the radius thereof is Rwy, Rwy=D; the left pick tip point (A1) is on a left pick tip circular arc line, the center of the left pick tip circular arc line is O1, the radius thereof is Ra1, and 0.57D≤Ra1≤0.9D; the right pick tip point (A11) is on a right pick tip circular arc line, the center of the right pick tip circular arc line is O1, the radius thereof is Ra2, and 0.57D≤Ra2≤0.9D; the intersection of the left spider claw top line (1-2-1) and the right spider claw top line (1-2-2) is a valley point (A6), the coordinate value of the valley point (A6) on the x-axis deviating from the y-axis is a valley point deviation E, -0.3D≤E≤0.15D, and the coordinate value of the valley point (A6) on the y-axis is a valley point height H, 0.35*max(Ra1,Ra2)≤H≤0.75max(Ra1,Ra2); when the x-axis of the spider claw top line is counterclockwise upward to a position at an angle of +Ψ / 2 swing angle with the X-axis, the position is an upper extreme position (θ+); at this time, the right spider claw top line is at the uppermost position, and the left spider claw top line is at the lowermost position; when the x-axis of the spider claw top line is swung to coincide with the X-axis, the position is a zero position (θ0). ​ ​ ​ ​ ​ ​ When the spider-shaped claw top-line screen piece (1-2) swings around the rotation center O1, the included angle between the x-axis when swinging to the upper extreme position (θ + ) and the x-axis when swinging to the lower extreme position (θ - ) is the full swing angle Ψ, Ψ≤180°; ​ ​ The lowermost position (θ-) of the spider claw top line is reached when the x-axis of the spider claw top line is moved clockwise downward to an angle of -Ψ / 2 with the x-axis; The spider claw top line of the spider claw top line screen piece (1-2) has an x-axis as a starting edge, a left shoulder angle λ, -25°≤λ≤10°; an x-axis as a starting edge, a left shoulder angle λ, -25°≤λ≤10°; an x-axis as a starting edge, a right shoulder angle μ, -10°≤μ≤25°, and │λ│+│μ│≤50°; a left included angle ε, 45°≤ε≤85°; a right included angle ζ, 45°≤ζ≤85°; a right intersection angle α, 90°≤α≤100°+│μ│; a left intersection angle β, 90°≤β≤100°+│λ│; and the relationship between the angles is α=ε+(│λ│+│μ│), β=ζ+(│λ│+│μ│).

2. The screening machine according to claim 1, wherein: the left hook (A1-A2) is an inwardly concave circular arc segment, one end of which is connected to the left hook tip point (A1) and the other end of which is connected to the left leg (A2-A3) at point A2, the circular arc radius of the left hook (A1-A2) being RA1-A2, 0.025≤RA1-A2≤2D; the left leg (A2-A3) is a circular arc segment, the chord of the left leg (A2-A3) coinciding with the left leg line (A2'-C1), the chord height being h1, h1≤0.05D, the radius of the left leg (A2-A3) being RA2-A3, RA2-A3≥0.45D, one end of the left leg (A2-A3) being connected to the left hook (A1-A2) and the other end of the left leg (A2-A3) being connected to the left top (A3-A4-A5); the left top (A3-A4-A5) is an outwardly convex circular arc segment, one end of which is connected to the left leg (A2-A3) and the other end of which is connected to the left shoulder (A5-A6), the left top (A3-A4-A5) being limited within the range defined by the left surrounding circular arc line (Wza-Wzb), the left drop point circular arc line (Wc3a-Wc3b) of the left drop point (C3) on the left top (A3-A4-A5) being limited within the range defined by the left large top surrounding circular arc line (Wcda-Wcdb) and the left small top surrounding circular arc line (Wcxa-Wcxb), the center of the left large top surrounding circular arc line (Wcda-Wcdb) being at O1, the radius of the left large top surrounding circular arc line (Wcda-Wcdb) being Rcd, Rcx≤Rcd≤Ra1, the center of the left small top surrounding circular arc line (Wcxa-Wcxb) being at O1, the radius of the left small top surrounding circular arc line (Wcxa-Wcxb) being Rcx, 0.8Ra1≤Rcx≤Rcd, and the center of the left drop point circular arc line (Wc3a-Wc3b) being at O1, the radius of the left drop point circular arc line (Wc3a-Wc3b) being Rc3, Rcx≤Rc3≤Rcd. The left shoulder (A5-A6) is a circular arc segment, the chord of the left shoulder (A5-A6) coincides with the left shoulder line (A6-C1), the chord height is h3, h3≤0.05D, the radius is RA5-A6, RA5-A6≥0.45D, one end of the left shoulder (A5-A6) is connected with the left top (A3-A4-A5), and the other end is connected with the right spider claw top line (1-2-2); The right hook (A11-A10) is a concave circular arc segment, one end is at the right hook tip point (A11), and the other end is connected with the right leg (A10-A9); the circular arc radius of the right hook (A11-A10) is RA11-A10, and 0.025≤RA11-A10≤2D; The right leg (A10-A9) is a circular arc segment, the chord of the right leg (A10-A9) coincides with the right leg line (A10'-C2), the chord height is h2, h2≤0.05D, the radius is RA10-A9, RA10-A9≥0.45D, one end of the right leg (A10-A9) is connected with the right hook (A11-A10), and the other end is connected with the right arm (A9-A8); The right arm (A9-A8) is a convex circular arc segment, one end of the right arm (A9-A8) is connected with the right leg (A10-A9), and the other end is connected with the right top (A8-A7); the right arm (A9-A8) is limited in the range defined by the right enclosing circular arc line (Wya-Wyb); The right top (A8-A7) is a convex circular arc segment, one end of the right top (A8-A7) is connected with the right arm (A9-A8), and the other end is connected with the right shoulder (A7-A6); the right top (A8-A7) is limited in the range defined by the right enclosing circular arc line (Wya-Wyb); the right drop point (C4) on the right top (A8-A7) is located on the right drop point circular arc line (Wc4a-Wc4b) defined in the range of the right large top enclosing circular arc line (Wbda-Wbdb) and the right small top enclosing circular arc line (Wbxa-Wbxb); the center of the right large top enclosing circular arc line (Wbda-Wbdb) is at O1, and the radius is Rbd; the center of the right small top enclosing circular arc line (Wbxa-Wbxb) is at O1, and the radius is Rbx, 0.8Ra2≤Rbx≤Rbd; the center of the right drop point circular arc line (Wc4a-Wc4b) is at O1, and the radius is Rc4, Rbx≤Rc4≤Rbd; The right shoulder (A7-A6) is a concave circular arc segment, one end of the right shoulder (A7-A6) is connected with the left spider claw top line (1-2-1) and tangent to or connected with the right shoulder line (A6-C2), and the other end is connected with the right top (A8-A7); the radius of the right shoulder is RA7-A6, and RA7-A6≥0.4D.

3. The screening machine according to claim 1 or 2, characterized in that: The spacer sleeve (1-3) is a harrow-shaped spacer sleeve, which comprises a left harrow line (1-3-1), a right harrow line (1-3-2), a left top-avoiding line (1-3-3), a right top-avoiding line (1-3-4), and three hub rim arcs (B5-B6, B9-B10, B13-B1) with a radius of Rg. The right horn line (1-3-2) is a circular arc with a center at A01, a radius of D, and tangent to a right horn line base circle with a radius of Rd1; The left horn line (1-3-1) is a circular arc with a center at A02, a radius of D, and tangent to a left horn line base circle with a radius of Rd2; The left top-avoiding line (1-3-3) is composed of three circular arcs that are tangent to each other: one is a circular arc (B12-B13) with a center at A04 and a radius of D; one is a circular arc (B11-B12) with a center at O1, a radius of Re, a preset angle of Δ1, and coinciding with the left top-avoiding line base circle, B11 and B12 being tangent points; and one is a circular arc (B10-B11) with a center at A07 and a radius of D; when Re≥Rg, the left top-avoiding line (1-3-3) is an axial hub rim arc (B10-B12(B11)-B13) with a center at O1 and a radius of Rg, the preset angle Δ1 being a central angle of a circle with a center at O1, a radius of Re, and an initial side O1-B12, 0°≤Δ1≤40°; The right top-avoiding line (1-3-4) is composed of three circular arcs that are tangent to each other: one is a circular arc (B6-B7) with a center at A03 and a radius of D; one is a circular arc (B7-B8) with a center at O1, a radius of Rf, a preset angle of Δ2, and coinciding with the right top-avoiding line base circle, B7 and B8 being tangent points; and one is a circular arc (B8-B9) with a center at A08 and a radius of D; when Rf≥Rg, the right top-avoiding line (1-3-4) is an axial hub rim arc (B6-B7(B8)-B9) with a center at O1 and a radius of Rg, the preset angle Δ2 being a central angle of a circle with a center at O1, a radius of Rf, and an initial side O1-B7, -40°≤Δ2≤0°; The axial hub radius Rg is a common radius of the axial hub of the spider claw top line screen piece (1-2) and the axial hub rim arc of the spacer sleeve (1-3), 0.25D≤Rg≤0.7D; The intersection of the left horn line (1-3-1) and the right horn line (1-3-2) is a horn tip point (B3), the line (B3-O1) connecting the horn tip point (B3) and the center O1 is a tip center line, the distance from the horn tip point (B3) to the center O1 is a tip center distance J, 0.6H≤J≤1.3H, the included angle between the tip center line (B3-O1) and the y-axis is an offset angle φ, -3°≤φ≤5°; When the spider claw top line screen piece (1-2) and the spacer sleeve (1-3) swing around the rotation center O1, the left pick-up point (A1) of the left spider claw top line (1-2-1) on the adjacent right shaft (O1, O100) and the right horn line (1-3-2) of the spacer sleeve (1-3) on the adjacent left shaft (O10, O1) have a left pick-up point spacing Va1 in the normal direction, 0.01≤Va1≤15. The distance between the right pointed tip A11 of the right spider claw top line (1-2-2) on the adjacent left side shaft (O10, O1) and the left horn line (1-3-1) of the spacer sleeve (1-3) on the adjacent right side shaft (O1, O100) in the normal direction is a right pointed tip distance Va2, 0.01≤Va2≤15; The distance between the left top A8-A7 of the right spider claw top line (1-2-2) on the adjacent left side shaft (O10, O1) and the right falling point C4 of the spacer sleeve left top line (1-3-3) on the adjacent right side shaft (O1, O100) in the normal direction is Vb, 0.01≤Vb≤15; The distance between the left top A3-A4-A5 of the left spider claw top line (1-2-1) on the adjacent right side shaft (O1, O100) and the left falling point C3 of the spacer sleeve right top line (1-3-4) on the adjacent left side shaft (O10, O1) in the normal direction is Vc, 0.01≤Vc≤15.

4. The screening machine according to claim 1 or 2, characterized in that: The left leg (A2-A3) is a straight line; the left shoulder (A5-A6) is a straight line; the right leg (A10-A9) is a straight line; and the right shoulder (A7-A6) is a straight line.

5. The screening machine of claim 1 or 2, wherein: The spacer sleeve (1-3) is a circular ring spacer sleeve.

6. The screening machine of claim 1, wherein: The spider claw top line screen piece (1-2) is a plate-shaped piece.

7. The screening machine of claim 1, wherein: The spider claw top line screen piece (1-2) and the spacer sleeve (1-3) are fused to form a winding forming spider claw top line screen piece.

8. The screening machine of claim 1, wherein: The spider claw top line screen piece (1-2) is fused by the left separated left spider claw top line (1-2-1) and the spacer sleeve (1-3), and the right separated right spider claw top line (1-2-2) and the spacer sleeve (1-3) to form two parts.

9. The screening machine of claim 1, wherein: The spider claw top line screen piece (1-2) and the spacer sleeve (1-3) are fused to form left and right half spider claw top line screen pieces.

10. The screening machine of claim 1, characterized in that: The spider claw top line screen piece (1-2) and the spacer sleeve (1-3) are fused to form left and right half spider claw top line screen pieces with dovetail joints at the shaft sleeve part joint, and left and right half spider claw top line screen pieces with dovetail joints between the shaft sleeve part and the spider claw and a reinforcing support rod.

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