Eight-layer vibrating screen with screen longitudinal quick-tightening mechanism

Abstract

The application relates to the technical field of ore dressing equipment, in particular to an eight-layer vibrating screen with a longitudinal quick tensioning mechanism of a screen mesh, which comprises a fixed support, a floating support, a screening assembly, a vibrating motor, a distributor and a discharge part, a plurality of screening assemblies fixed on the floating support respectively comprise a screen box mechanism and a screen mesh fixedly connected to the top end of the screen box mechanism, shaft cylinders and shaft rods are rotatably sleeved on the bottom ends of the two side walls of the screen box mechanism in pairs, a driven gear is sleeved on the outer end of the shaft cylinder, and a driving gear meshed with the driven gear is sleeved on the outer end of the shaft rod; the tensioning shafts sleeved in the shaft cylinders at two ends are used for fixing the bottom end of the screen mesh; the side wall of a box body fixed on the outer side wall of the screen box mechanism is provided with shaft holes one and two, and the outer end of the shaft rod is rotatably sleeved in the shaft hole two; the outer side wall of the box body is fixed with a backstop assembly for limiting one-way rotation of the tensioning shaft at the position corresponding to the shaft hole one; the problem that the screen mesh of a multi-layer high-frequency vibrating fine screen is difficult to be safely and efficiently tensioned is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ore dressing equipment, in particular to an eight-layer vibration screen with a longitudinal quick tensioning mechanism for screen mesh. BACKGROUND

[0002] The high-frequency fine screen is a fine classification device, and the size of the screen mesh can be selected according to the requirements of qualified particle levels, and the high-frequency fine screen can be designed as a single-layer high-frequency fine screen or a multi-layer high-frequency fine screen. The high-frequency vibration fine screen is composed of a ore distributor, a feeder, a screen frame, a rubber spring, a fiber-reinforced polyurethane fine screen mesh, a vibration motor, a support, and a collection hopper. The multi-layer high-frequency vibration fine screen is driven by two vibration motors with opposite movement directions to make the screen frame move linearly, and the resultant force of the two vibration motors acting on the screen frame passes through the center of gravity of the screen frame. Therefore, the vibration forces of each point on the screen frame are consistent. The ore slurry is fed from the upper part or the lower part of the ore distributor, uniformly distributed into multiple paths by the ore distributor, and then enters the multiple feeders through the feeding hose. The feeder evenly spreads the ore slurry on the screen surface. The material on the screen surface is continuously vibrated at a high frequency and small amplitude, and makes a continuous jump on the inclined screen surface, so that the material is dispersed. The fine particles in the material pass through the screen holes during the uniformization process, which is called the undersize product. The material larger than the screen holes makes a continuous forward jump on the inclined screen surface, and finally jumps out of the screen to become the oversize 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 vibration motors to move linearly, and the forces of each point on the screen frame are 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 screen mesh in each screen box is fixed on the corresponding support beam. After the screen machine is used for a long time, the screen mesh may become loose and needs to be tensioned again. Currently, the operation of tensioning the screen mesh generally requires workers to climb into the screen box to operate, that is, to adjust from the connection between the two sides of the screen mesh and the side wall of the screen box. This not only has high operation difficulty and consumes a large amount of labor, but also has safety hazards such as slipping and falling of the operator. SUMMARY

[0005] The purpose of the present application is to provide an eight-layer vibration screen with a longitudinal quick tensioning mechanism for screen mesh, which solves the problem of difficult and safe tensioning operation of the screen mesh of the multi-layer high-frequency vibration fine screen in the prior art.

[0006] In order to achieve the above object, the application provides the following technical scheme: the eight-layer vibrating screen with the screen longitudinal quick tensioning mechanism, which comprises a fixed support, a floating support connected to the inner cavity of the fixed support through an elastic damping mechanism, a screening assembly fixed on the floating support in an inclined direction, a vibrating motor fixed on the top of the floating support, a distributor connected to the top of the screening assembly, and a discharge part fixed on the bottom of the fixed support, wherein the floating support is fixed with a plurality of screening assemblies in parallel in the inclined direction, the distributor is used to supply the slurry to be screened to the corresponding screening assembly, and the vibrating motor drives the screening assembly to vibrate relative to the fixed support through the floating support to realize the screening of the slurry. The discharge part comprises a screen product collection and flow guide shell and a screen product collection and flow guide shell.

[0007] The screening assembly comprises a screen box mechanism and a screen fixedly connected to the top end of the inner cavity of the screen box mechanism, the two side walls of the screen box mechanism are respectively provided with a shaft cylinder and a shaft rod in pairs in a rotating manner at positions corresponding to the bottom end of the screen, the outer end of the shaft cylinder is fixedly provided with a driven gear, and the outer end of the shaft rod is fixedly provided with a driving gear engaged with the driven gear; the inner cavity of the screen box mechanism is provided with a tensioning shaft fixedly provided at both ends in the inner cavity of the shaft cylinder, and the bottom end of the screen is fixed to the outer peripheral wall of the tensioning shaft; the outer side wall of the screen box mechanism is fixedly provided with a box body accommodating the driven gear and the driving gear, the side wall of the box body is respectively provided with an axle hole one and an axle hole two at positions corresponding to the shaft cylinder and the shaft rod, and the outer end of the shaft rod is rotatably provided in the axle hole two; the outer side wall of the box body is fixedly provided with a backstop assembly for limiting the one-way rotation of the tensioning shaft at a position corresponding to the axle hole one.

[0008] Preferably, the two ends of the tensioning shaft are respectively fixedly provided with a short shaft in abutment with the shaft cylinder, the outer peripheral wall of the tensioning shaft is provided with a cutting surface in the axial direction, a plurality of fixed screw holes are uniformly provided in the cutting surface in the axial direction, and the screw fixedly provided on the bottom end of the screen is fixedly provided in the fixed screw hole.

[0009] Preferably, the backstop assembly comprises a cylindrical shell fixed to the outer side wall of the box body, an axle sleeve rotatably provided on the outer side wall of the cylindrical shell and fixedly provided with the short shaft at the outer end, a plurality of bevel gears uniformly fixed to the outer peripheral wall of the axle sleeve in the circumferential direction, a plurality of cylindrical shells fixedly provided on the outer peripheral wall of the cylindrical shell in the radial direction, a wedge head rod body slidably provided at the center of the inner end surface of the cylindrical shell, a ring body slidably provided in the inner cavity of the cylindrical shell and fixedly provided with the wedge head rod body, and a spring fixedly provided on the outer end of the wedge head rod body and supported on the ring body at the inner end.

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

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

[0012] Preferably, a pair of crossbeams are fixed between the two side walls of the inner cavity of the upper screen box near the bottom of the support frame, and a plurality of arc-shaped plates extending longitudinally are evenly fixed on the top surface of the crossbeams.

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

[0014] Preferably, the edge protector includes a strip connected to the inner side wall of the upper screen box, a plurality of mushroom heads uniformly fixed axially to the middle of the inner side wall of the strip, and a rubber edge strip. The middle of the outer side wall of the rubber edge strip is provided with a circular groove that matches the mushroom heads. The bottom surface of the rubber edge strip is pressed against the edge of the screen.

[0015] Preferably, the two side walls of the upper screen box are provided with multiple arc-shaped grooves corresponding to the positions of the slats, and the outer side wall of the upper screen box is vertically fixed with a fixing column corresponding to the center of the arc-shaped groove. The fixing column is rotatably sleeved with a swing arm, and the outer side wall of the slat is vertically fixed with a connecting column whose outer end is slidably engaged with the arc-shaped groove. The outer end of the connecting column is rotatably sleeved with the bottom end of the swing arm.

[0016] Preferably, eight screening components are fixed parallel to each other on the floating support along the inclined direction.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh involved in this invention facilitates the rotation of the tensioning shaft by rotating the shaft on the outside of the screen body. When the tensioning shaft rotates, the bottom end of the screen mesh can be tensioned, so as to realize the safe and efficient tensioning operation of the screen mesh of the multi-layer high-frequency vibrating fine screen. Attached Figure Description

[0019] Figure 1 This is a side view of the overall structure of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the screening component of the present invention;

[0021] Figure 3 For the present invention Figure 2Enlarged structural diagram at point A;

[0022] Figure 4 This is a three-dimensional structural diagram of the sieve box mechanism of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0024] Figure 6 This is a three-dimensional structural diagram of the edge protector of the present invention;

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the tensioning shaft component of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the box body of the present invention;

[0027] Figure 9 This is a cross-sectional view of the backstop assembly of the present invention.

[0028] In the diagram: 1 - Fixed bracket;

[0029] 2-Floating support;

[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-Crossbeam; 3.1.6-Arc plate; 3.1.7-Shaft cylinder; 3.1.8-Shaft rod; 3.1.8.1-Regular hexagonal groove; 3.1.9-Driven gear; 3.1.10-Driving gear; 3.1.11-Fixed column; 3.2-Screen; 3.3-Edge protector; 3.3.1-Strip; 3.3.2-Mushroom head; 3.3.3-Rubber edge strip; 3.3.4-Circular groove; 3.3.5-Connecting column;

[0031] 4-Vibration motor;

[0032] 5-Fabricator;

[0033] 6-Discharge section;

[0034] 7-Tensioning shaft; 7.1-Short shaft; 7.2-Cut surface; 7.3-Fixing screw hole;

[0035] 8-Box body; 8.1-Shaft hole one; 8.2-Shaft hole two;

[0036] 9-Backstop assembly; 9.1-Cylindrical housing; 9.2-Sleeve; 9.3-Helical gear; 9.4-Cylindrical housing; 9.5-Wedge head rod; 9.6-Ring; 9.7-Spring;

[0037] 10-Swing arm. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-9 The present invention provides a technical solution for an eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh, comprising a fixed support 1, a floating support 2 connected to the inner cavity of the fixed support 1 via an elastic damping mechanism, a screening component 3 fixed to the floating support 2 in an inclined direction, an excitation motor 4 fixed to the top of the floating support 2, a material distributor 5 connected to the top of the screening component 3, and a discharge section 6 fixed to the bottom of the fixed support 1.

[0040] Eight screening components 3 are fixed parallel to each other along the inclined direction on the floating support 2. Each screening component 3 includes a screen box mechanism 3.1 and a screen 3.2 whose top end is fixedly connected to the top of the inner cavity of the screen box mechanism 3.1. The two side walls of the screen box mechanism 3.1 are respectively fitted with a shaft cylinder 3.1.7 and a shaft rod 3.1.8 in pairs, corresponding to the bottom end of the screen 3.2. A driven gear 3.1.9 is fixedly fitted on the outer end of the shaft cylinder 3.1.7, and a driving gear 3.1.10 that meshes with the driven gear 3.1.9 is fixedly fitted on the outer end of the shaft rod 3.1.8. The bottom of the inner cavity of the screen box mechanism 3.1 has two ends fixedly fitted on the shaft cylinder 3.1. The tensioning shaft 7 inside the screen 3.2 is fixed to the outer peripheral wall of the tensioning shaft 7; the outer wall of the screen box mechanism 3.1 is fixed with a box 8 that accommodates the driven gear 3.1.9 and the driving gear 3.1.10. The side wall of the box 8 is provided with shaft hole 1 8.1 and shaft hole 2 8.2 corresponding to the positions of the shaft cylinder 3.1.7 and the shaft rod 3.1.8, respectively. The outer end of the shaft rod 3.1.8 is rotatably fitted into shaft hole 2 8.2; the outer wall of the box 8 is fixed with a backstop component 9 for restricting the unidirectional rotation of the tensioning shaft 7 at the position corresponding to the position of shaft hole 1 8.1.

[0041] Among them, the middle of both ends of the tensioning shaft 7 are respectively fixedly connected to the short shaft 7.1 which is fixedly sleeved with the shaft cylinder 3.1.7. The outer peripheral wall of the tensioning shaft 7 is provided with a cross surface 7.2 along its axial direction. Multiple fixing screw holes 7.3 are evenly provided in the middle of the cross surface 7.2 along the axial direction. The screws fitted at the bottom of the screen 3.2 are fixedly fitted into the fixing screw holes 7.3.

[0042] In summary, when it is necessary to tension the screen 3.2, 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 as follows: Using a wrench or similar tool, rotate the outer end of shaft 3.1.8 clockwise. Shaft 3.1.8 drives the driving gear 3.1.10 to rotate synchronously. Due to the meshing 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. The shaft cylinder 3.1.7 then drives the tensioning shaft 7 to rotate counterclockwise, thereby achieving the downward tensioning operation of the bottom end of the screen 3.2. During this process, due to the setting of the backstop component 9, the tensioning shaft 7 is restricted to rotating only counterclockwise, so that when shaft 3.1.8 stops rotating, the tensioning shaft 7 will not reverse.

[0044] To facilitate rotation of shaft 3.1.8, a regular hexagonal groove 3.1.8.1 is provided at the center of the outer end face of shaft 3.1.8. That is, when rotating the outer end of shaft 3.1.8, a ratchet wrench can be used, and the rotating end of the ratchet wrench fits into the internal hexagonal groove 3.1.8.1, thereby facilitating easy rotation of shaft 3.1.8.

[0045] The backstop assembly 9 can be a ratchet structure or the following structure: The backstop assembly 9 includes a cylindrical shell 9.1 fixed to the outer wall of the box 8, a bushing 9.2 whose outer end is rotatably fitted on the outer wall of the cylindrical shell 9.1 and fixedly connected to the outer end of the short shaft 7.1, a plurality of helical teeth 9.3 uniformly fixed to the outer peripheral wall of the bushing 9.2 in the circumferential direction, a plurality of cylindrical shells 9.4 fixedly fitted to the outer peripheral wall of the cylindrical shell 9.1 in the radial direction, a wedge rod 9.5 slidably fitted at the center of the inner end face of the cylindrical shell 9.4, a ring 9.6 slidably fitted in the inner cavity of the cylindrical shell 9.4 and fixedly connected to the wedge rod 9.5, and a spring 9.7 fitted on the outer end of the wedge rod 9.5 and supported on the ring 9.6 in the inner end. That is, when the tensioning shaft 7 rotates counterclockwise to tension the screen 3.2, the tensioning shaft 7 drives the bushing 9.2 to rotate counterclockwise via the short shaft 7.1. When the bushing 9.2 rotates counterclockwise, the arc surface of the helical tooth 9.3 pushes the wedge-shaped head of the wedge rod 9.5 outward, causing the ring 9.6 to compress the spring 9.7 and thus causing the wedge rod 9.5 to move outward, allowing the helical tooth 9.3 to pass through the inner end of the wedge rod 9.5. After each wedge rod 9.5 passes through, the planar side of the helical tooth 9.3 contacts the planar side of the wedge rod 9.5, thereby limiting the counterclockwise rotation of the bushing 9.2 and thus restricting the unidirectional rotation of the tensioning shaft 7.

[0046] The cylindrical housing 9.4 is threaded onto the circumferential wall of the cylindrical housing 9.1, and the cylindrical housing 9.1 is connected to the outer wall of the box 8 by screws, making the backstop assembly 9 easy to assemble and disassemble.

[0047] The screen box mechanism 3.1 includes an upper screen box 3.1.1 fixedly connected to the floating support 2, a bottom box 3.1.2 fixed to the bottom of the upper screen box 3.1.1, and a discharge cylinder 3.1.3 fixedly sleeved at the middle of the bottom end of the bottom box 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. A shaft cylinder 3.1.7 and a 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. A box body 8 is fixedly connected to the outer side wall of the bottom end of the upper screen box 3.1.1. The bottom end of the upper screen box 3.1.1 is connected to the over-screen product collection guide shell of the discharge section 6, and the bottom end of the discharge cylinder 3.1.3 is connected to the under-screen product collection guide shell of the discharge section 6.

[0048] A pair of crossbeams 3.1.5 are fixed between the two side walls of the inner cavity of the upper screen box 3.1.1, near the bottom of the support frame 3.1.4. Multiple arc-shaped plates 3.1.6 extending longitudinally are evenly fixed to the top surface of the crossbeams 3.1.5 along the transverse direction. When the tensioning shaft 7 rotates to tension the screen 3.2, the arc-shaped plates 3.1.6 guide and transition the bottom end of the screen 3.2, preventing excessive bending of the screen 3.2 during tensioning.

[0049] To prevent slurry from leaking through the gaps on both sides of the screen 3.2, edge protectors 3.3 are installed on both sides of the inner wall of the upper screen box 3.1.1 to hold the edges of the screen 3.2 in place. Each edge protector 3.3 includes a strip 3.3.1 connected to the inner wall of the upper screen box 3.1.1, multiple mushroom-shaped heads 3.3.2 evenly fixed axially to the middle of the inner wall of the strip 3.3.1, and a rubber edge strip 3.3.3. The outer wall of the rubber edge strip 3.3.3 has a circular groove 3.3.4 that engages with the mushroom-shaped heads 3.3.2. The bottom surface of the rubber edge strip 3.3.3 presses against the edge of the screen 3.2. In other words, the rubber edge strip 3.3.3 presses tightly against the edges of the screen 3.2, improving the sealing of the screen 3.2 and preventing material leakage through the gaps between the screen 3.2 and the side wall of the upper screen box 3.1.1.

[0050] The upper screen box 3.1.1 has multiple arc-shaped grooves 3.1.1.1 on both sides corresponding to the position of the slat 3.3.1. The upper screen box 3.1.1 has a fixed column 3.1.11 vertically fixed on the outer side wall corresponding to the center of the arc-shaped groove 3.1.1.1. The fixed column 3.1.11 is rotatably sleeved with the swing arm 10. The outer side wall of the slat 3.3.1 has a connecting column 3.3.5 vertically fixed, the outer end of which is slidably engaged with the arc-shaped groove 3.1.1.1. The outer end of the connecting column 3.3.5 is rotatably sleeved with the bottom end of the swing arm 10. That is, during the downward tensioning operation of the screen 3.2, the friction between the screen 3.2 and the rubber strip 3.3.3 will drive the rubber strip 3.3.3 downward, so that the rubber strip 3.3.3 and the plate 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 strip 3.3.3 and the plate 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 document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. An eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh, comprising a fixed support (1), a floating support (2) connected to the inner cavity of the fixed support (1) via an elastic damping mechanism, a screening assembly (3) fixed in an inclined direction to the floating support (2), an excitation motor (4) fixed to the top of the floating support (2), a feeder (5) connected to the top of the screening assembly (3), and a discharge section (6) fixed to the bottom of the fixed support (1), characterized in that: The floating support (2) is fixedly mounted with multiple screening components (3) in parallel along the inclined direction. Each screening component (3) includes a screen box mechanism (3.1) and a screen (3.2) whose top end is fixedly connected to the top of the inner cavity of the screen box mechanism (3.1). The two side walls of the screen box mechanism (3.1) are respectively fitted with a shaft cylinder (3.1.7) and a shaft rod (3.1.8) in pairs, corresponding to the bottom end of the screen rod (3.2). The outer end of the shaft cylinder (3.1.7) is fixedly fitted with a driven gear (3.1.9), and the outer end of the shaft rod (3.1.8) is fixedly fitted with a driving gear (3.1.10) that meshes with the driven gear (3.1.9). The bottom of the inner cavity of the sieve box mechanism (3.1) is provided with a tensioning shaft (7) with both ends fixedly fitted inside the shaft cylinder (3.1.7), and the bottom end of the sieve (3.2) is fixed to the outer peripheral wall of the tensioning shaft (7); The outer wall of the sieve box mechanism (3.1) is fixed with a box (8) that accommodates the driven gear (3.1.9) and the driving gear (3.1.10). The side wall of the box (8) is provided with shaft hole one (8.1) and shaft hole two (8.2) respectively corresponding to the positions of the shaft cylinder (3.1.7) and the shaft (3.1.8). The outer end of the shaft (3.1.8) is rotatably fitted into the shaft hole two (8.2). The outer wall of the box (8) is fixed with a backstop assembly (9) for restricting the one-way rotation of the tensioning shaft (7) at the position corresponding to the shaft hole (8.1). The screen box mechanism (3.1) includes 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 at the middle of the bottom end of the bottom box body (3.1.2). The inner walls of the upper sieve box (3.1.1) are respectively equipped with edge protectors (3.3) for pressing the edges of the screen (3.2) on both sides. The edge protector (3.3) includes a strip (3.3.1) connected to the inner wall of the upper sieve box (3.1.1), a plurality of mushroom heads (3.3.2) uniformly fixed axially to the middle of the inner wall of the strip (3.3.1), 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). The bottom surface of the rubber edge strip (3.3.3) presses against the edge of the screen (3.2). The two sides of the upper sieve box (3.1.1) are provided with a plurality of arc-shaped grooves corresponding to the position of the strip (3.3.1). 3.1.1.1), the outer wall of the upper screen box (3.1.1) corresponds to the arc-shaped groove ( 3.1.1.1) A fixed column (3.1.11) is vertically fixed at the center of the circle. The fixed column (3.1.11) is rotatably sleeved with a swing arm (10). A connecting column (3.3.5) is vertically fixed on the outer wall of the strip (3.3.1) and its outer end is slidably engaged with the arc groove (3.1.1.1). The outer end of the connecting column (3.3.5) is rotatably sleeved with the bottom end of the swing arm (10).

2. The eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh according to claim 1, characterized in that: The tensioning shaft (7) has short shafts (7.1) fixedly connected to the shaft cylinder (3.1.7) at its two ends. The outer peripheral wall of the tensioning shaft (7) has a cross-section (7.2) along its axial direction. The cross-section (7.2) has a plurality of fixed screw holes (7.3) evenly arranged along its axial direction in the middle of the cross-section (7.2). The screws fitted at the bottom of the screen (3.2) are fixedly fitted into the fixed screw holes (7.3).

3. The eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh according to claim 2, characterized in that: The backstop assembly (9) includes a cylindrical shell (9.1) fixed to the outer wall of the box body (8), a bushing (9.2) whose outer end is rotatably fitted onto 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 helical teeth (9.3) uniformly fixed to the outer peripheral wall of the bushing (9.2) in the circumferential direction, a plurality of cylindrical shells (9.4) fixedly fitted onto the outer peripheral wall of the cylindrical shell (9.1) in the radial direction, a wedge rod (9.5) slidably fitted onto the center of the inner end face of the cylindrical shell (9.4), a ring (9.6) slidably fitted onto the inner cavity of the cylindrical shell (9.4) and fixedly sleeved with the wedge rod (9.5), and a spring (9.7) fitted onto the outer end of the wedge rod (9.5) and supported on the ring (9.6) at the inner end.

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

5. The eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh according to claim 1, characterized in that: 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 fitted on the two side walls of the upper screen box (3.1.1) near the bottom. The box body (8) is fixedly connected to the outer side wall at the bottom of the upper screen box (3.1.1).

6. The eight-layer vibrating screen with a longitudinal rapid tensioning mechanism for the screen mesh according to claim 5, characterized in that: A pair of crossbeams (3.1.5) are fixed between the two side walls of the inner cavity of the upper screen box (3.1.1) near the bottom 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 crossbeams (3.1.5) along the transverse direction.

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

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