Eight-lamination vibrating screen with screen longitudinal rapid tensioning mechanism

Abstract

The invention relates to the technical field of preparation equipment, in particular to an eight-lamination vibrating screen with a screen longitudinal rapid tensioning mechanism, which comprises a fixed support, a floating support, a plurality of screening assemblies, a vibration excitation motor, a distributor and a discharge part, the plurality of screening assemblies fixed on the floating support respectively comprise a screen box mechanism and a screen with the top end fixedly connected to the top end of the screen box mechanism; the bottom ends of the two side walls of the screen box mechanism are rotationally sleeved with shaft barrels and shaft rods in pairs, the outer ends of the shaft barrels are sleeved with driven gears, and the outer ends of the shaft rods are sleeved with driving gears meshed with the driven gears. The tensioning shaft piece with the two ends sleeved with the shaft barrels is used for fixing the bottom end of the screen; a first shaft hole and a second shaft hole are formed in the side wall of the box body fixed to the outer side wall of the screen box mechanism. The outer end of the shaft rod is rotationally sleeved with the second shaft hole. A non-return assembly used for limiting one-way rotation of the tensioning shaft piece is fixed to the position, corresponding to the shaft hole, of the outer side wall of the box body. The problem that the screen mesh of the multi-laminated high-frequency vibration fine screen is difficult to be tensioned safely and efficiently is well solved.

Description

Technical Field

[0001] The invention relates to the technical field of ore dressing equipment, in particular to an eight-layer vibrating screen with a screen mesh longitudinal rapid tensioning mechanism. Background Art

[0002] High-frequency fine screen is a fine grading equipment. The screen size can be selected according to the requirements of qualified particle size. It can be designed as a single-layer high-frequency fine screen or a multi-layer high-frequency fine screen. Among them, the high-frequency vibration fine screen is composed of a separator, a feeder, a screen frame, a rubber spring, a fiber-reinforced polyurethane fine screen, an exciting motor, a bracket, a collecting bucket, etc. The laminated high-frequency vibration fine screen is driven by two exciting motors with opposite movement directions to drive the screen frame to move linearly. The combined force of the two exciting motors on the screen frame passes through the center of gravity of the screen frame. Therefore, the exciting force at each point on the screen frame is consistent. The slurry is fed from the upper or lower part of the separator, evenly divided into multiple paths by the separator, and then enters multiple feeders through the feeding hose. The feeder evenly sprinkles the slurry on the upper end of the screen surface. The material on the screen surface is continuously subjected to high-frequency and small-amplitude vibrations, which causes it to make continuous jumps on the inclined screen surface, causing the material to be dispersed. The fine-grained material passes through the screen holes during the mixing process and is called the under-screen product, while the material larger than the screen holes makes continuous jumps forward on the inclined screen surface and finally jumps out of the screen to become the over-screen product.

[0003] The difference between the multi-layer high-frequency vibration fine screen and the single-layer high-frequency vibration fine screen is that multiple screen frames are overlapped and driven by two exciting motors to do linear motion. The force at each point on the screen frame is the same, which improves the screening efficiency and prolongs the service life of the equipment.

[0004] In the commonly used multi-layer high-frequency vibration fine screen, the screens in each layer of the screen box are fixed on the corresponding support beams. After the screen machine is used for a long time, the screen will become loose and need to be re-tightened. At present, the operation of tightening the screen generally requires workers to climb into the screen box to operate, that is, to adjust the connection between the two sides of the screen and the side wall of the screen box. Not only is the operation difficult and consumes a lot of manpower, but there are also safety hazards such as slipping and falling of operators. Summary of the invention

[0005] The purpose of the present invention is to provide an eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen, so as to solve the problem in the prior art that the screen of a multi-layer high-frequency vibrating fine screen is difficult to tension safely and efficiently.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen, comprising a fixed bracket, a floating bracket connected to the inner cavity of the fixed bracket through an elastic shock-absorbing mechanism, a screening assembly fixed on the floating bracket along an inclined direction, an exciting motor fixed to the top of the floating bracket, a distributor connected to the top of the screening assembly, and a discharge portion fixed to the bottom of the fixed bracket, wherein the floating bracket is parallelly fixed with a plurality of screening assemblies along an inclined direction, the distributor is used to supply the slurry to be screened to the corresponding screening assemblies respectively, and the exciting motor drives the screening assembly to vibrate relative to the fixed bracket through the floating bracket to achieve screening of the slurry. The discharge portion comprises a collection and diversion shell for the product above the screen and a collection and diversion shell for the finished product below the screen.

[0007] The screening components respectively include a screen box mechanism and a screen mesh fixedly connected to the top of the inner cavity of the screen box mechanism at the top; the two side walls of the screen box mechanism are rotatably fitted with shaft cylinders and shaft rods in pairs corresponding to the positions of the bottom ends of the screen mesh; the outer end of the shaft cylinder is fixedly fitted with a driven gear, and the outer end of the shaft rod is fixedly fitted with a driving gear meshing with the driven gear; a tensioning shaft member whose two ends are respectively fixedly fitted in the shaft cylinder is provided at the bottom of the inner cavity of the screen box mechanism, and the bottom end of the screen mesh is fixed on the outer peripheral wall of the tensioning shaft member; a box body accommodating the driven gear and the driving gear is fixedly provided on the outer side wall of the screen box mechanism, and shaft holes one and two are respectively provided on the side walls of the box body corresponding to the positions of the shaft cylinder and the shaft rod, and the outer end of the shaft rod is rotatably fitted in the shaft hole two; a check assembly for limiting the unidirectional rotation of the tensioning shaft member is fixedly provided on the outer side wall of the box body corresponding to the position of the shaft hole one.

[0008] Preferably, short shafts fixedly connected to the shaft tube are respectively fixedly docked in the middle of both ends of the tensioning shaft, and the outer peripheral wall of the tensioning shaft is provided with a section along its axial direction, and a plurality of fixing screw holes are evenly arranged in the middle of the section along the axial direction, and the screws mounted on the bottom end of the screen are fixedly mounted in the fixing screw holes.

[0009] Preferably, the check assembly includes a cylindrical shell fixed to the outer wall of the box body, a sleeve whose outer end is rotatably mounted on the outer wall of the cylindrical shell and fixedly sleeved with the outer end of the short shaft, a plurality of bevel teeth evenly fixed to the outer peripheral wall of the sleeve along the circumferential direction, a plurality of cylindrical shells fixedly mounted on the outer peripheral wall of the cylindrical shell along the radial direction, a wedge rod body slidably mounted at the center of the inner end surface of the cylindrical shell, a ring body slidably mounted in the inner cavity of the cylindrical shell and fixedly sleeved with the wedge rod body, and a spring mounted on the outer end of the wedge rod and with the inner end supported on the ring body.

[0010] Preferably, a regular hexagonal groove is provided at the center of the outer end surface of the shaft rod.

[0011] Preferably, the screen box mechanism includes an upper screen box fixedly connected to the floating bracket, a bottom box body fixed to the bottom of the upper screen box, and a discharge barrel fixedly sleeved on the middle part of the bottom end of the bottom box body, a support frame for supporting the screen is fixed between the two side walls of the inner cavity of the upper screen box, the shaft cylinder and the shaft rod are respectively rotatably sleeved on the two side walls of the upper screen box near the bottom end, and the box body is fixedly connected to the outer side wall of the bottom end of the upper screen box.

[0012] Preferably, cross beams are fixed in pairs between the two side walls of the inner cavity of the upper screen box near the bottom end of the support frame, and a plurality of arc-shaped plates extending respectively in the longitudinal direction are evenly fixed on the top surface of the cross beams in the transverse direction.

[0013] Preferably, side walls of the inner cavity of the upper screen box are respectively provided with edge guards for pressing and holding the edges of the screen on both sides.

[0014] Preferably, the edge guard comprises a slat connected to the inner side wall of the upper screen box, a plurality of mushroom heads evenly fixed axially to the middle of the inner side wall of the slat, and a rubber edge strip, a circular groove matching with the mushroom head is provided in the middle of the outer side wall of the rubber edge strip, and the bottom surface of the rubber edge strip is pressed against the edge of the screen.

[0015] Preferably, a plurality of arc-shaped grooves are provided on both side walls of the upper screen box at positions corresponding to the slats, and fixed columns are vertically fixed on the outer side walls of the upper screen box at positions corresponding to the centers of the arc-shaped grooves, and the fixed columns are rotatably sleeved with swing arms, and connecting columns whose outer ends are slidably engaged with the arc-shaped grooves are vertically fixed to the outer side walls of the slats, and the outer ends of the connecting columns are rotatably sleeved with the bottom end of the swing arm.

[0016] Preferably, eight screening assemblies are fixed in parallel on the floating support along the inclined direction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The eight-layer vibrating screen with a quick longitudinal tensioning mechanism of the screen involved in the present invention is convenient for driving the tensioning shaft to rotate by rotating the shaft rod on the outside of the screen machine body. When the tensioning shaft rotates, the bottom end of the screen can be tensioned, so as to realize the safe and efficient tensioning operation of the screen of the multi-layer high-frequency vibrating fine screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic side view of the structure of the present invention as a whole;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the screening assembly of the present invention;

[0021] Figure 3 For the present invention Figure 2A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the screen box mechanism of the present invention;

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the edge protection piece of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the tensioning shaft of the present invention;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the box body of the present invention;

[0027] Fig. 9 It is a schematic cross-sectional structural diagram of the check assembly of the present invention.

[0028] In the figure: 1-fixed bracket;

[0029] 2- Floating bracket;

[0030] 3-Screening assembly; 3.1-Screen box mechanism; 3.1.1-Upper screen box; 3.1.1.1-Arc groove; 3.1.2-Bottom box; 3.1.3-Discharge cylinder; 3.1.4-Support frame; 3.1.5-Cross beam; 3.1.6-Arc plate; 3.1.7-Axis cylinder; 3.1.8-Axis rod; 3.1.8.1-Regular hexagonal groove; 3.1.9-Driven gear; 3.1.10-Drive gear; 3.1.11-Fixed column; 3.2-Screen; 3.3-Edge guard; 3.3.1-Slat; 3.3.2-Mushroom head; 3.3.3-Rubber edge strip; 3.3.4-Circular groove; 3.3.5-Connecting column;

[0031] 4- Excitation motor;

[0032] 5-fabricator;

[0033] 6-Discharging section;

[0034] 7-tensioning shaft; 7.1-short shaft; 7.2-section; 7.3-fixing screw hole;

[0035] 8-box body; 8.1-axis hole 1; 8.2-axis hole 2;

[0036] 9-backstop assembly; 9.1-cylindrical housing; 9.2-shaft sleeve; 9.3-helical teeth; 9.4-cylindrical housing; 9.5-wedge rod body; 9.6-ring body; 9.7-spring;

[0037] 10-Swing your arms. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-9 The present invention provides a technical solution, an eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for a screen, comprising a fixed bracket 1, a floating bracket 2 connected to the inner cavity of the fixed bracket 1 through an elastic shock absorbing mechanism, a screening component 3 fixed on the floating bracket 2 along an inclined direction, an exciting motor 4 fixed to the top of the floating bracket 2, a distributor 5 connected to the top of the screening component 3, and a discharge part 6 fixed to the bottom of the fixed bracket 1.

[0040] The floating bracket 2 is parallelly fixed with eight screening assemblies 3 along the tilting direction. The screening assemblies 3 respectively include a screening box mechanism 3.1 and a screen 3.2 whose top is fixedly connected to the top of the inner cavity of the screening box mechanism 3.1. The two side walls of the screening box mechanism 3.1 are respectively rotatably mounted with a shaft cylinder 3.1.7 and a shaft rod 3.1.8 at positions corresponding to the bottom of the screen 3.2. The outer end of the shaft cylinder 3.1.7 is fixedly mounted with a driven gear 3.1.9, and the outer end of the shaft rod 3.1.8 is fixedly mounted with a driving gear 3.1.10 meshing with the driven gear 3.1.9; the bottom of the inner cavity of the screening box mechanism 3.1 is provided with two ends respectively fixedly mounted on the shaft cylinder 3.1. The tensioning shaft 7 in the sieve 3.2 is fixed to the outer peripheral wall of the tensioning shaft 7; the outer side wall of the screen box mechanism 3.1 is fixed with a box body 8 for accommodating a driven gear 3.1.9 and a driving gear 3.1.10, and the side walls of the box body 8 are respectively provided with shaft holes 1 8.1 and shaft holes 2 8.2 corresponding to the positions of the shaft cylinder 3.1.7 and the shaft rod 3.1.8, and the outer end of the shaft rod 3.1.8 is rotatably sleeved in the shaft hole 2 8.2; the outer side wall of the box body 8 is fixed with a check assembly 9 for limiting the unidirectional rotation of the tensioning shaft 7 corresponding to the position of the shaft hole 1 8.1.

[0041] Among them, short shafts 7.1 fixedly connected to the shaft tube 3.1.7 are fixedly connected at the middle of both ends of the tensioning shaft 7, and a section 7.2 is arranged on the outer peripheral wall of the tensioning shaft 7 along its axial direction. A plurality of fixing screw holes 7.3 are evenly arranged in the middle of the section 7.2 along the axial direction, and the screws set at the bottom end of the screen 3.2 are fixedly set in the fixing screw holes 7.3.

[0042] In summary, when the screen 3.2 needs to be tightened, since the top of the screen 3.2 is fixed to the top of the screen box mechanism 3.1, it is only necessary to pull the bottom of the screen 3.2 downward at the bottom of the screen box mechanism 3.1.

[0043] The specific operation is: use a tool such as a wrench to rotate the outer end of the shaft 3.1.8 clockwise, and the shaft 3.1.8 drives the driving gear 3.1.10 to rotate synchronously. Due to the meshing action between the driving gear 3.1.10 and the driven gear 3.1.9, the driven gear 3.1.9 drives the shaft cylinder 3.1.7 to rotate counterclockwise, and the shaft cylinder 3.1.7 drives the tension shaft 7 to rotate counterclockwise to achieve the downward tensioning operation of the bottom end of the screen 3.2. During this period, due to the setting of the backstop component 9, the tension shaft 7 is limited to rotate counterclockwise, so that when the shaft 3.1.8 stops rotating, the tension shaft 7 will not reverse.

[0044] In order to facilitate the rotation of the shaft 3.1.8, a regular hexagonal groove 3.1.8.1 is provided in the center of the outer end surface of the shaft 3.1.8. That is, when the outer end of the shaft 3.1.8 is rotated, a ratchet wrench can be used, and the rotating end of the ratchet wrench is sleeved and matched with the inner hexagonal groove 3.1.8.1, so as to facilitate the easy rotation of the shaft 3.1.8.

[0045] Among them, the check assembly 9 can adopt a ratchet structure or the following structure: the check assembly 9 includes a cylindrical shell 9.1 fixed to the outer wall of the box body 8, a sleeve 9.2 whose outer end is rotatably mounted on the outer wall of the cylindrical shell 9.1 and fixedly sleeved with the outer end of the short shaft 7.1, a plurality of bevel teeth 9.3 uniformly fixed to the outer peripheral wall of the sleeve 9.2 along the circumferential direction, a plurality of cylindrical shells 9.4 fixedly mounted on the outer peripheral wall of the cylindrical shell 9.1 along the radial direction, a wedge rod body 9.5 slidably mounted at the center of the inner end surface of the cylindrical shell 9.4, a ring body 9.6 slidably mounted in the inner cavity of the cylindrical shell 9.4 and fixedly sleeved with the wedge rod body 9.5, and a spring 9.7 mounted on the outer end of the wedge rod body 9.5 and with the inner end supported on the ring body 9.6. That is, when the tension shaft 7 rotates counterclockwise to tighten the screen 3.2, the tension shaft 7 drives the sleeve 9.2 to rotate counterclockwise through the short shaft 7.1. When the sleeve 9.2 rotates counterclockwise, the arc surface of the helical teeth 9.3 pushes the wedge head of the wedge rod 9.5 outward, so that the ring body 9.6 compresses the spring 9.7 to achieve the outer movement of the wedge rod 9.5, so that the helical teeth 9.3 can pass through the inner end of the wedge rod 9.5. After each helical tooth 9.3 passes through a wedge rod 9.5, its flat side contacts the flat side of the wedge rod 9.5, so as to achieve the effect of limiting the sleeve 9.2 from rotating in the opposite clockwise direction, thereby limiting the unidirectional rotation of the tension shaft 7.

[0046] The inner end of the cylindrical shell 9.4 is threadedly sleeved on the peripheral wall of the cylindrical shell 9.1, and the cylindrical shell 9.1 is sutured with the outer wall of the box body 8 using screws, so that the check assembly 9 as a whole is easy to flexibly assemble and disassemble.

[0047] The screen box mechanism 3.1 includes an upper screen box 3.1.1 fixedly connected to the floating bracket 2, a bottom box body 3.1.2 fixed to the bottom of the upper screen box 3.1.1, and a discharge cylinder 3.1.3 fixedly sleeved on the middle of the bottom end of the bottom box body 3.1.2. A support frame 3.1.4 for supporting the screen 3.2 is fixed between the two side walls of the inner cavity of the upper screen box 3.1.1. The shaft cylinder 3.1.7 and the shaft rod 3.1.8 are respectively rotatably sleeved on the two side walls of the upper screen box 3.1.1 near the bottom end, and the box body 8 is fixedly connected to the outer side wall of the bottom end of the upper screen box 3.1.1. Among them, the bottom end of the upper screen box 3.1.1 is connected to the screen product collection and diversion shell of the discharge part 6, and the bottom end of the discharge cylinder 3.1.3 is respectively connected to the screen product collection and diversion shell of the discharge part 6.

[0048] Crossbeams 3.1.5 are fixed in pairs between the inner walls of the upper screen box 3.1.1 near the bottom of the support frame 3.1.4, and multiple arc plates 3.1.6 extending longitudinally are evenly fixed on the top of the crossbeams 3.1.5 in the transverse direction. When the tensioning shaft 7 rotates to tighten the screen 3.2, the arc plates 3.1.6 are used to guide and transition the bottom of the screen 3.2 to prevent the screen 3.2 from being excessively bent when being stretched.

[0049] In order to prevent the slurry on the screen from leaking from the gaps on both sides of the screen 3.2, the inner walls of the upper screen box 3.1.1 are respectively provided with edge guards 3.3 for pressing the edges of the screen 3.2 on both sides. The edge guards 3.3 include a slat 3.3.1 connected to the inner wall of the upper screen box 3.1.1, a plurality of mushroom heads 3.3.2 uniformly fixed to the middle of the inner wall of the slat 3.3.1 along the axial direction, and a rubber edge strip 3.3.3. The middle of the outer wall of the rubber edge strip 3.3.3 is provided with a circular groove 3.3.4 that matches the mushroom head 3.3.2, and the bottom surface of the rubber edge strip 3.3.3 is pressed on the edge of the screen 3.2. That is, the rubber edge strip 3.3.3 presses the edges of the screen surface of the screen 3.2 on both sides, improves the sealing of the two sides of the screen 3.2, and avoids the phenomenon of material leakage in the gap between the screen 3.2 and the side wall of the upper screen box 3.1.1.

[0050] A plurality of arc grooves 3.1.1.1 are provided on both side walls of the upper screen box 3.1.1 at positions corresponding to the slats 3.3.1, and fixed columns 3.1.11 are vertically fixed at positions corresponding to the centers of the arc grooves 3.1.1.1 on the outer side walls of the upper screen box 3.1.1, and the fixed columns 3.1.11 are rotatably sleeved with swing arms 10, and connecting columns 3.3.5 whose outer ends are slidably engaged with the arc grooves 3.1.1.1 are vertically fixed to the outer side walls of the slats 3.3.1, and the outer ends of the connecting columns 3.3.5 are rotatably sleeved with the bottom ends of the swing arms 10. That is, during the process of tensioning the screen 3.2 downward, the friction between the screen 3.2 and the rubber edge strip 3.3.3 will drive the rubber edge strip 3.3.3 downward, so that the rubber edge strip 3.3.3 and the slat 3.3.1 as a whole have a slight downward displacement. Under the guidance of the connecting column 3.3.5 and the arc groove 3.1.1.1, the rubber edge strip 3.3.3 and the slat 3.3.1 as a whole not only have a downward displacement, but also an upward displacement at the same time, thereby reducing the resistance formed when tensioning the screen 3.2.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eight-layer vibrating screen with a quick longitudinal tensioning mechanism for a screen mesh, comprising a fixed support (1), a floating support (2) connected to the inner cavity of the fixed support (1) through an elastic shock absorbing mechanism, a screening assembly (3) fixed to the floating support (2) along an inclined direction, an exciting motor (4) fixed to the top of the floating support (2), a distributor (5) connected to the top of the screening assembly (3), and a discharging portion (6) fixed to the bottom of the fixed support (1), characterized in that: The floating bracket (2) is parallely fixed with a plurality of screening assemblies (3) along the inclined direction, and the screening assemblies (3) respectively comprise a screening box mechanism (3.1) and a screening mesh (3.2) whose top end is fixedly connected to the top of the inner cavity of the screening box mechanism (3.1); the two side walls of the screening box mechanism (3.1) are rotatably sleeved with shaft cylinders (3.1.7) and shaft rods (3.1.8) in pairs at positions corresponding to the bottom ends of the screening meshes (3.2); the outer end of the shaft cylinder (3.1.7) is fixedly sleeved with a driven gear (3.1.9), and the outer end of the shaft rod (3.1.8) is fixedly sleeved with a driving gear (3.1.10) meshing with the driven gear (3.1.9); The bottom of the inner cavity of the screen box mechanism (3.1) is provided with a tensioning shaft (7) with two ends respectively fixedly sleeved in the shaft cylinder (3.1.7), and the bottom end of the screen (3.2) is fixed on the outer peripheral wall of the tensioning shaft (7); A box body (8) for accommodating the driven gear (3.1.9) and the driving gear (3.1.10) is fixed to the outer side wall of the screen box mechanism (3.1), and a shaft hole 1 (8.1) and a shaft hole 2 (8.2) are respectively provided on the side wall of the box body (8) at positions corresponding to the shaft cylinder (3.1.7) and the shaft rod (3.1.8), and the outer end of the shaft rod (3.1.8) is rotatably sleeved in the shaft hole 2 (8.2); A check assembly (9) for limiting the one-way rotation of the tensioning shaft (7) is fixed at a position on the outer side wall of the box body (8) corresponding to the shaft hole 1 (8.1).

2. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 1, characterized in that: The middle parts of both ends of the tensioning shaft (7) are respectively fixedly connected with short shafts (7.1) which are fixedly sleeved with the shaft tube (3.1.7); the outer peripheral wall of the tensioning shaft (7) is provided with a section (7.2) along its axial direction; the middle part of the section (7.2) is evenly provided with a plurality of fixing screw holes (7.3) along the axial direction; the screws sleeved at the bottom end of the screen (3.2) are fixedly sleeved in the fixing screw holes (7.3).

3. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 2, characterized in that: The check assembly (9) comprises a cylindrical shell (9.1) fixed to the outer wall of the box body (8), a sleeve (9.2) whose outer end is rotatably sleeved on the outer wall of the cylindrical shell (9.1) and fixedly sleeved on the outer end of the short shaft (7.1), a plurality of oblique teeth (9.3) uniformly fixed to the outer peripheral wall of the sleeve (9.2) along the circumferential direction, a plurality of columnar shells (9.4) fixedly sleeved on the outer peripheral wall of the cylindrical shell (9.1) along the radial direction, a wedge rod (9.5) slidably sleeved on the center of the inner end surface of the columnar shell (9.4), a ring body (9.6) slidably sleeved on the inner cavity of the columnar shell (9.4) and fixedly sleeved on the wedge rod (9.5), and a spring (9.7) sleeved on the outer end of the wedge rod (9.5) and whose inner end is supported on the ring body (9.6).

4. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 1, characterized in that: A regular hexagonal groove (3.1.8.1) is provided at the center of the outer end surface of the shaft rod (3.1.8).

5. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 1, characterized in that: The screen box mechanism (3.1) comprises an upper screen box (3.1.1) fixedly connected to the floating support (2), a bottom box body (3.1.2) fixed to the bottom of the upper screen box (3.1.1), and a discharge cylinder (3.1.3) fixedly sleeved on the middle part of the bottom end of the bottom box body (3.1.2); a support frame (3.1.4) for supporting the screen (3.2) is fixed between the two side walls of the inner cavity of the upper screen box (3.1.1); the shaft cylinder (3.1.7) and the shaft rod (3.1.8) are rotatably sleeved on the two side walls of the upper screen box (3.1.1) near the bottom end; and the box body (8) is fixedly connected to the outer side wall of the bottom end of the upper screen box (3.1.1).

6. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 5, characterized in that: Cross beams (3.1.5) are fixed in pairs between the inner walls of the upper screen box (3.1.1) and near the bottom end of the support frame (3.1.4). A plurality of arc-shaped plates (3.1.6) extending longitudinally are evenly fixed on the top surface of the cross beams (3.1.5) in the transverse direction.

7. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 5, characterized in that: Edge protection pieces (3.3) for pressing and holding the edges of the screen (3.2) on both sides are respectively installed on the inner cavity walls of the upper screen box (3.1.1).

8. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for the screen according to claim 7, characterized in that: The edge guard (3.3) comprises a slat (3.3.1) connected to the inner wall of the upper screen box (3.1.1), a plurality of mushroom heads (3.3.2) uniformly fixed axially to the middle of the inner wall of the slat (3.3.1), and a rubber edge strip (3.3.3), a circular groove (3.3.4) matching with the mushroom head (3.3.2) is provided in the middle of the outer wall of the rubber edge strip (3.3.3), and the bottom surface of the rubber edge strip (3.3.3) is pressed on the edge of the screen (3.2).

9. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for screen mesh according to claim 8, characterized in that: The two side walls of the upper screen box (3.1.1) are provided with a plurality of arc grooves ( 3.1.1.1), the outer side wall of the upper screen box (3.1.1) corresponds to the arc groove ( A fixing column (3.1.11) is vertically fixed at the position of the center of the circle (3.1.1.1), and the fixing column (3.1.11) is rotatably sleeved with a swing arm (10). A connecting column (3.3.5) whose outer end is slidably engaged with the arc groove (3.1.1.1) is vertically fixed to the outer wall of the slat (3.3.1), and the outer end of the connecting column (3.3.5) is rotatably sleeved with the bottom end of the swing arm (10).

10. The eight-layer vibrating screen with a quick longitudinal tensioning mechanism for screen mesh according to claim 1, characterized in that: Eight screening components (3) are fixed in parallel on the floating support (2) along an inclined direction.

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