Large flip-flow screen with octagonal tube supporting structure

Abstract

The invention relates to the technical field of preparation equipment, in particular to a large flip-flow screen with an octagonal tube supporting structure. A supporting beam comprises an octagonal tube and end plates which are arranged at the two ends of the octagonal tube and fixed to the inner side wall of a screen box; the fixing hoop is clamped on the octagonal tube; the supporting batten comprises a strip-shaped plate with the bottom fixed to the top of the fixing hoop, a lantern ring fixedly arranged on the strip-shaped plate in a sleeving mode, a vertical rod arranged in the lantern ring in a sliding and sleeving mode, a spherical shell fixed to the top end of the vertical rod, a ball head rotationally arranged in the spherical shell in a sleeving mode and an inner threaded pipe fixed to the top end of the ball head. A third penetrating hole is formed in the lower batten arranged above the strip-shaped plate in parallel. The strip-shaped screens are arranged in a stubble pressing mode in the transverse direction, and first penetrating holes are formed in the two sides of each strip-shaped screen. The connecting piece sequentially penetrates through the first penetrating hole and the third penetrating hole and then is sleeved with the inner threaded pipe. Threaded holes are formed in the top faces of the edge beams which are fixed to the inner side wall of the screen box and located on the lower side of the strip-shaped screen. The problem that a flexible screen in a large flip-flow screen is inconvenient to assemble and maintain is well solved.

Description

Technical Field

[0001] The invention relates to the technical field of ore dressing equipment, in particular to a large-scale relaxation screen with an octagonal tube support structure. Background Art

[0002] The relaxation screen is a new type of screening machine developed from the traditional circular vibrating screen in the early 1980s. The screen is made of a retractable polyurethane rubber material. When working, the screen is alternately tightened and relaxed, causing the material to bounce forward, which can prevent the material from sticking to the screen and clogging the screen holes. At the same time, due to the use of a flexible screen plate, the projectile acceleration reaches 30-50 times the acceleration of gravity, and the maximum amplitude of the screen plate can reach 40mm. Therefore, the screen holes are not easy to be blocked, and the screening efficiency is improved, the processing capacity is large, the dynamic load is small, the power consumption is low, and the noise is low. Through resonance, one drive provides two vibrations. The dynamic screen plate achieves a high acceleration through tension and relaxation. The two parametric masses vibrate relative to each other at the same frequency, causing the screen plate to produce tension and relaxation movements. The relative linear movement of the two parametric masses is adjustable to optimize the operation of the equipment. All necessary parameters can be adjusted according to the different screening materials. The relaxation screen adopts the dual vibration principle of basic vibration and additional vibration. The basic vibration is the circular vibration generated by the rotation of the rotating eccentric block, and the additional vibration is the elliptical vibration driven by the basic vibration.

[0003] In order to increase the processing capacity per unit area of ​​the relaxation screen, large relaxation screens are generally used for screening fine-grained and sticky materials in some mineral processing industries. The main components of the relaxation screen include screen box, support frame, box-type vibrator, motor and elastic support parts. Among them, a support beam is provided in the screen box for installing the flexible screen, a crossbeam is fixed on the top of the screen box, the box-type vibrator is fixed at both ends of the crossbeam, and the elastic support parts are used to support and connect the two sides of the screen box to the top of the support frame. Since the width of the screen box in the large relaxation screen is large, the span of the crossbeam and support beam equipped with it is also increased accordingly, which places more stringent requirements on the mechanical properties of the beam body. Correspondingly, the area of ​​the flexible screen is also large. However, the flexible screen equipped with the traditional relaxation screen is generally a whole screen, that is, a whole screen with a larger area needs to be replaced if there is a damage when it is used, which not only has a large workload, but also easily causes waste. In addition, the fixed installation of large-sized flexible screens must not only take into account the need for firm installation, but also meet the requirement that the flexible screens can match the screen box for alternate tightening and loosening. However, there is currently no good solution to the above problems in the application of loose-tension screens. Summary of the invention

[0004] The object of the present invention is to provide a large-scale loose-fitting screen with an octagonal tube support structure, so as to solve the problem that the flexible screen in the large-scale loose-fitting screen in the prior art is inconvenient to assemble and maintain.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-scale relaxation screen with an octagonal tube support structure, comprising a support frame, an elastic member installed on the top of the support frame, a screen box whose front and rear ends of two side walls are respectively connected to the top of the elastic member, and a crossbeam connected between the tops of the two side walls of the screen box and used to install a box-type vibrator, the support beam comprising an octagonal tube and end plates arranged at both ends of the octagonal tube and fixedly connected to the inner wall of the screen box; the fixing hoop is uniformly clamped on the octagonal tube in the transverse direction; the support plate strip comprises a strip plate extending in the longitudinal direction and whose bottom is fixedly connected to the top of the fixing hoop, a plurality of rings fixedly mounted on the strip plate, a vertical rod slidably mounted in the ring, and a vertical rod fixed to the vertical rod. A spherical shell at the top, a ball head rotatably mounted in the spherical shell, and an internally threaded tube fixed vertically to the top of the ball head; the lower slat is arranged in parallel above the strip plate, and the lower slat is provided with three perforations corresponding to the positions of the internally threaded tube; a plurality of strip-shaped screens extending vertically are arranged in a transverse stubble manner, and perforations one corresponding to the three perforations are provided at the edges of both sides of the strip-shaped screens; the connecting piece passes through perforation one and perforation three in sequence and is threadedly sleeved with the internally threaded tube; the side beam is fixed to the inner wall of the screen box and is located at the lower side of the strip-shaped screen, and the top surface of the side beam is provided with a threaded hole corresponding to the position of perforation one that matches the threaded sleeve of the bottom end of the connecting piece.

[0006] Preferably, the fixing hoop includes a semi-hoop one clamped with the bottom of the octagonal tube, a semi-hoop two clamped with the top of the octagonal tube, a suture bolt for fixing the two ends of the semi-hoop one to the two ends of the semi-hoop two respectively, and a screw rod one vertically fixed to the top surface of the semi-hoop two, a groove is fixed at the bottom of the strip plate to clamp and match the top of the semi-hoop two, and a through hole two is provided on the strip plate to fit with a sleeve of the screw rod.

[0007] Preferably, the octagonal tube is formed by cold rolling of a steel tube.

[0008] Preferably, a chassis is fixed to the bottom end of the vertical rod, and a spring is sleeved on the vertical rod at a position between the top surface of the chassis and the bottom surface of the strip plate.

[0009] Preferably, the connecting member includes a screw rod three that is threadedly sleeved and matched with the internal threaded tube and the threaded hole, and a short column that is fixedly docked at the top end of the screw rod three.

[0010] Preferably, a hemisphere is fixed on the top of the short column, and the top surface of the strip-shaped screen at the pressing joint is provided with a pressure strip whose bottom end is clipped and matched with the hemisphere, and the bottom surface of the pressure strip is axially provided with two strip grooves that are clipped and matched with the short column along the longitudinal sliding connection, and the pressure strip is located on the upper side of the two strip grooves and is axially provided with two semi-cylindrical cavities that are clipped and matched with the hemisphere in a sliding connection.

[0011] Preferably, side strips are respectively provided on the upper sides of the outer edges of the strip-shaped screen located on both sides, and the bottom surface of the side strip is axially provided with a strip groove that matches the short column in the longitudinal sliding snap-fit, and the side strip is located on the upper side of the strip groove and is axially provided with a semi-cylindrical cavity that matches the hemisphere in the longitudinal sliding snap-fit.

[0012] Preferably, the two side walls of the screen box are provided with a plurality of side holes corresponding to the position of the middle axis of the side beam side wall, and the outer side wall of the side beam is fixed with a screw rod 2 which is sleeved and matched with the side hole, and the outer end of the screw rod 2 passes through the side hole and is threadedly sleeved with a fastening nut.

[0013] Preferably, the strip plate is a rigid plate, the lower plate strip is an elastically bendable plate, and the strip-shaped screen, pressure strip and edge strip are respectively molded by polyurethane casting.

[0014] Preferably, a plurality of reinforcement beams are fixedly connected between the tops of the two side walls of the screen box.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The flexible screen surface of the large-scale relaxation screen with an octagonal tube support structure of the present invention is composed of a plurality of strip-shaped screens. When a certain area of ​​the screen surface is damaged, only the corresponding strip-shaped screen can be replaced, thereby reducing the difficulty of overall assembly and maintenance of the flexible screen surface and reducing the cost of use.

[0017] 2. The large-scale relaxation screen with an octagonal tube support structure involved in the present invention comprises supporting slats, lower slats and connecting parts which constitute the fixing parts of the screen surface. This can not only firmly fix the screen surface, but also enable the flexible screen as a whole to better adapt to the vibration of the screen box and be continuously tightened and relaxed, thereby greatly improving the screening efficiency.

[0018] 3. The supporting beam body used in the large-scale loose-tension screen with an octagonal tube support structure of the present invention is an octagonal tube structure, which improves the mechanical properties and can better meet the rigidity and strength requirements of the large-scale loose-tension screen box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

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

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the strip-shaped screen of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the edge strip of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the layering strip of the present invention;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the fixing hoop of the present invention;

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

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

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the side beam of the present invention;

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the connecting piece of the present invention;

[0029] Fig.11 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0030] Fig.12 For the present invention Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0031] In the figure: 1-support frame;

[0032] 2- elastic member;

[0033] 3-Screen box; 3.1-Side hole;

[0034] 4- beam;

[0035] 5-support beam; 5.1-octagonal tube; 5.2-end plate;

[0036] 6-Reinforcement beams;

[0037] 7- Strip-shaped screen; 7.1- Perforation 1;

[0038] 8-side strip; 8.1-strip groove one; 8.2-semi-cylindrical cavity one;

[0039] 9-pressing strip; 9.1-strip groove two; 9.2-semi-cylindrical cavity two;

[0040] 10-fixing hoop; 10.1-semi-hoop one; 10.2-semi-hoop two; 10.3-suture bolt; 10.4-screw rod one;

[0041] 11-supporting strip; 11.1-strip plate; 11.1.1-perforation 2; 11.2-slot; 11.3-ring; 11.4-vertical rod; 11.5-spherical shell; 11.6-ball head; 11.7-internal threaded tube; 11.8-chassis; 11.9-spring;

[0042] 12-lower slat; 12.1-perforation three;

[0043] 13-side beam; 13.1-threaded hole; 13.2-screw rod 2; 13.3-fastening nut;

[0044] 14-connecting piece; 14.1-screw rod three; 14.2-short column; 14.3-hemispherical body. DETAILED DESCRIPTION

[0045] 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.

[0046] See also Figure 1-12 The present invention provides a technical solution, a large-scale relaxation screen with an octagonal tube support structure, including a support frame 1, an elastic member 2 installed at the top of the support frame 1, a screen box 3 whose front and rear ends of both side walls are respectively connected to the top of the elastic member 2, and a crossbeam 4 connected between the tops of both side walls of the screen box 3 and used to install a box-type vibrator. In order to improve the rigidity and strength of the screen box 3, a plurality of reinforcing beams 6 are fixedly connected between the tops of both side walls of the screen box 3.

[0047] The support beam 5 includes an octagonal tube 5.1 and end plates 5.2 disposed at both ends of the octagonal tube 5.1 and fixedly connected to the inner wall of the screen box 3; wherein the octagonal tube 5.1 is formed by cold rolling of a steel tube. That is, the support beam 5 as a whole has good mechanical properties, so that it can be well applied to the screen box 3 with a larger span. The octagonal tube 5.1 and the end plates 5.2 are fixedly connected by welding. The end plates 5.2 are fixed to the two side walls of the screen box 3 with bolts.

[0048] The fixing hoop 10 is uniformly clamped on the octagonal tube 5.1 in the horizontal direction; wherein, the fixing hoop 10 includes a semi-hoop 10.1 clamped with the bottom of the octagonal tube 5.1, a semi-hoop 2 10.2 clamped with the top of the octagonal tube 5.1, a suture bolt 10.3 used to fix the two ends of the semi-hoop 10.1 with the two ends of the semi-hoop 2 10.2 respectively, and a screw 10.4 fixed to the top surface of the semi-hoop 2 10.2 in the vertical direction.

[0049] The support strip 11 comprises a strip plate 11.1 extending in the longitudinal direction and having its bottom fixedly connected to the top of the fixing hoop 10, a plurality of collars 11.3 fixedly mounted on the strip plate 11.1, a vertical rod 11.4 slidably mounted in the collars 11.3, a spherical shell 11.5 fixed to the top of the vertical rod 11.4, a ball head 11.6 rotatably mounted in the spherical shell 11.5, and an internal threaded tube 11.7 vertically fixed to the top of the ball head 11.6. A slot 11.2 is fixed at the bottom of the strip plate 11.1 to be clamped and matched with the top of the second semi-hoop 10.2, and a second through hole 11.1.1 is provided on the strip plate 11.1 to be sleeved and matched with the first screw rod 10.4. In order to enable the vertical rod 11.4 to move up and down flexibly, a bottom plate 11.8 is fixed to the bottom of the vertical rod 11.4, and a spring 11.9 is sleeved on the vertical rod 11.4 between the top surface of the bottom plate 11.8 and the bottom surface of the strip plate 11.1.

[0050] The lower strip 12 is arranged parallel to the strip plate 11.1, and the lower strip 12 is provided with three perforations 12.1 at positions corresponding to the internal threaded tube 11.7.

[0051] A plurality of strip-shaped screens 7 extending vertically are arranged in a transverse stubby manner to form the entire flexible screen surface structure. Perforations 1 7.1 corresponding to perforations 3 12.1 are arranged at the edges of both sides of the strip-shaped screen 7.

[0052] The side beam 13 is fixed to the inner side wall of the screen box 3 and is located at the lower side of the strip-shaped screen 7. The top surface of the side beam 13 is provided with a threaded hole 13.1 at a position corresponding to the perforation 1 7.1. Among them, the two side walls of the screen box 3 are provided with a plurality of side holes 3.1 at positions corresponding to the middle axis of the side wall of the side beam 13. The outer side wall of the side beam 13 is fixed with a screw rod 13.2 that is sleeved and matched with the side hole 3.1. The outer end of the screw rod 13.2 passes through the side hole 3.1 and is then threadedly fitted with a fastening nut 13.3. That is, the plurality of screw rods 13.2 on the outer side wall of the side beam 13 are respectively passed through the side hole 3.1 in order from the inside to the outside, and then the fastening nut 13.3 is fitted on the outer end of the screw rod 13.2 and fastened, so as to firmly fix the side beam 13 on the inner side wall of the screen box 3.

[0053] The connector 14 passes through the first through hole 7.1 and the third through hole 12.1 in sequence and is threadedly sleeved with the internal threaded tube 11.7. The connector 14 includes a screw rod 3 14.1 threadedly sleeved with the internal threaded tube 11.7 and the threaded hole 13.1 and a short column 14.2 fixedly docked at the top of the screw rod 3 14.1. A hemispherical body 14.3 is fixed at the top of the short column 14.2.

[0054] The top surface of the strip-shaped screen 7 at the stub is provided with a pressure strip 9 whose bottom end is clamped and matched with the hemisphere 14.3, and the bottom surface of the pressure strip 9 is provided with a strip groove 9.1 along the axial direction, which is clamped and matched with the short column 14.2 along the longitudinal sliding, and the pressure strip 9 is located on the upper side of the strip groove 9.1. A semi-cylindrical cavity 9.2 is provided along the axial direction, which is clamped and matched with the hemisphere 14.3. The pressure strip 9 has an isosceles triangle cross section, which is clamped on the top of the connector 14, and the bottom surface is pressed on the corresponding strip-shaped screen 7. The top of the pressure strip 9 is a pointed structure, which can produce a vertical cutting effect on the screened material and easily divert the screened material to both sides onto the flexible screen surface.

[0055] The upper side of the outer edge of the strip-shaped screen 7 located at both sides is provided with side strips 8, and the bottom surface of the side strip 8 is provided with a strip groove 8.1 along the axial direction, which is matched with the short column 14.2 in the longitudinal sliding engagement, and the side strip 8 is provided with a semi-cylindrical cavity 8.2 along the axial direction, which is matched with the hemisphere 14.3 in the sliding engagement, at the upper side of the strip groove 8.1. The side strip 8 is used to improve the sealing between the flexible screen surface structure and the inner wall of the screen box 3, and is used to press and fix the two sides of the flexible screen surface structure.

[0056] The strip plate 11.1 is a rigid plate, the lower strip 12 is an elastically bendable plate, and the strip-shaped screen 7, the pressure strip 9 and the edge strip 8 are respectively formed by casting of polyurethane.

[0057] In summary, the support beam 5, the fixing hoop 10, the supporting slats 11 and the lower side strips 12 constitute the supporting structure of the flexible screen surface structure, that is, the bottom surface of the short column 14.2 presses the overlapping connection of the strip-shaped screen 7 against the top surface of the lower slat 12, and the bottom surface of the lower slat 12 is supported on the top surface of the internal threaded tube 11.7, which not only can assemble and fix multiple strip-shaped screens 7 to form an integral screen surface structure, but also when the screen box 3 vibrates, the vertical rod 11.4 can move up and down relative to the ring 11.3, and the ball head 11.6 can rotate relative to the spherical shell 11.5, so that the flexible screen surface structure can adapt to the vibration and perform corresponding tensioning and relaxation, and the amplitude of the up and down vibration of the flexible screen surface structure is increased to a certain extent, which helps to improve the screening efficiency.

[0058] 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.

[0059] 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. A large-scale relaxation screen with an octagonal tube support structure, comprising a support frame (1), an elastic member (2) mounted on the top of the support frame (1), a screen box (3) with front and rear ends of two side walls respectively connected to the top of the elastic member (2), and a crossbeam (4) connected between the tops of the two side walls of the screen box (3) and used for mounting a box-type vibrator, characterized in that: Also includes: A support beam (5), the support beam (5) comprising an octagonal tube (5.1) and end plates (5.2) provided at both ends of the octagonal tube (5.1) and fixedly connected to the inner wall of the screen box (3); A fixing hoop (10), the fixing hoop (10) being uniformly clamped on the octagonal tube (5.1) in the transverse direction; A support strip (11), the support strip (11) comprising a strip plate (11.1) extending in the longitudinal direction and having a bottom fixedly connected to the top of the fixing hoop (10), a plurality of collars (11.3) fixedly sleeved on the strip plate (11.1), a vertical rod (11.4) slidably sleeved in the collars (11.3), a spherical shell (11.5) fixed to the top of the vertical rod (11.4), a ball head (11.6) rotatably sleeved in the spherical shell (11.5), and an internally threaded tube (11.7) vertically fixed to the top of the ball head (11.6); A lower strip (12), the lower strip (12) being arranged parallel to the strip plate (11.1), and the lower strip (12) being provided with three perforations (12.1) at positions corresponding to the internally threaded tube (11.7); A strip-shaped screen (7), wherein a plurality of strip-shaped screens (7) extending in the vertical direction are arranged in a transverse stubby manner, and a perforation one (7.1) corresponding to the perforation three (12.1) is provided at the edges of both sides of the strip-shaped screen (7); A connecting piece (14), wherein the connecting piece (14) passes through the first through hole (7.1) and the third through hole (12.1) in sequence and is threadedly sleeved with the internally threaded pipe (11.7); A side beam (13) is fixed to the inner wall of the screen box (3) and is located at the lower side of the strip-shaped screen (7); a threaded hole (13.1) is provided on the top surface of the side beam (13) at a position corresponding to the through hole 1 (7.1) and is matched with the threaded sleeve at the bottom end of the connecting piece (14).

2. The large-scale loose-fitting screen with an octagonal tube support structure according to claim 1, characterized in that: The fixing hoop (10) comprises a semi-hoop 1 (10.1) clamped with the bottom of the octagonal tube (5.1), a semi-hoop 2 (10.2) clamped with the top of the octagonal tube (5.1), a suture bolt (10.3) used to fix the two ends of the semi-hoop 1 (10.1) with the two ends of the semi-hoop 2 (10.2) respectively, and a screw rod 1 (10.4) fixed vertically to the top surface of the semi-hoop 2 (10.2), a slot (11.2) clamped and matched with the top of the semi-hoop 2 (10.2) is fixed at the bottom of the strip plate (11.1), and a through hole 2 (11.1.1) is provided on the strip plate (11.1) and is sleeved and matched with the screw rod 1 (10.4).

3. The large-scale loose-fitting screen with an octagonal tube support structure according to claim 1, characterized in that: The octagonal tube (5.1) is formed by cold rolling of a steel tube.

4. The large-scale loose-fitting screen with an octagonal tube support structure according to claim 1, characterized in that: A bottom plate (11.8) is fixed to the bottom end of the vertical rod (11.4), and a spring (11.9) is sleeved on the vertical rod (11.4) at a position between the top surface of the bottom plate (11.8) and the bottom surface of the strip plate (11.1).

5. The large-scale loose-fitting screen with an octagonal tube support structure according to claim 1, characterized in that: The connecting piece (14) comprises a screw rod three (14.1) threadedly sleeved and matched with the internal threaded tube (11.7) and the threaded hole (13.1), and a short column (14.2) fixedly docked at the top end of the screw rod three (14.1).

6. The large-scale loose-fitting screen with an octagonal tube support structure according to claim 5, characterized in that: A hemispherical body (14.3) is fixed on the top of the short column (14.2); a pressure strip (9) whose bottom end is snap-fitted with the hemispherical body (14.3) is provided on the top surface of the strip-shaped screen (7) at the stub end; a strip groove (9.1) is axially provided on the bottom surface of the pressure strip (9) for longitudinal sliding snap-fitting with the short column (14.2); and a semi-cylindrical cavity (9.2) is axially provided at the position of the pressure strip (9) located above the strip groove (9.1) for longitudinal sliding snap-fitting with the hemispherical body (14.3).

7. The large-scale flip-flop screen with an octagonal tube support structure according to claim 6, characterized in that: Side strips (8) are respectively provided on the upper sides of the outer edges of the strip-shaped screen (7) located at the two side positions, and the bottom surface of the side strip (8) is axially provided with a strip groove (8.1) that is matched with the short column (14.2) in a longitudinal sliding snap-fitting manner, and the side strip (8) is axially provided with a semi-cylindrical cavity (8.2) that is matched with the hemispherical body (14.3) in a sliding snap-fitting manner at the position of the side strip (8) located above the strip groove (8.1).

8. The large-scale loose-fitting screen with an octagonal tube support structure according to claim 1, characterized in that: A plurality of side holes (3.1) are provided on both side walls of the screen box (3) at positions corresponding to the middle axis of the side walls of the side beams (13); a second screw rod (13.2) sleeved and matched with the side holes (3.1) is fixed to the outer side wall of the side beams (13); and a fastening nut (13.3) is threadedly sleeved on the outer end of the second screw rod (13.2) after passing through the side holes (3.1).

9. The large-scale flip-flop screen with an octagonal tube support structure according to claim 7, characterized in that: The strip plate (11.1) is a rigid plate, the lower plate strip (12) is an elastically bendable plate, and the strip-shaped screen (7), the pressure strip (9) and the side strip (8) are respectively formed by polyurethane casting.

10. The large-scale flip-flop screen with an octagonal tube support structure according to claim 1, characterized in that: A plurality of reinforcement beams (6) are fixedly connected between the tops of the two side walls of the screen box (3).

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