CN108906602A - A kind of double-layer banana type vibration flip flop screen - Google Patents

Abstract

The invention discloses a kind of double-layer banana types to vibrate flip flop screen, it includes layer screening box, excitation system, drive system and support, the layer screening box includes two side plates, pan feeding beam, reciprocal sieve plate and Relaxation sieve-plate, two side plates are parallel to each other and to pass through spring vertically-mounted on the support, the reciprocal sieve plate and Relaxation sieve-plate are mounted between two side plates and reciprocal sieve plate is located at the top of Relaxation sieve-plate, the pan feeding beam is located above the feed end of reciprocal sieve plate and is fixed on two side plates, the excitation system is mounted in the driving beam between two side plates and connect with drive system.The present invention is provided with reciprocal sieve plate and Relaxation sieve-plate in screen box, and under the action of excitation system, the reciprocal sieve plate on upper layer does reciprocating linear vibration, and for being classified in advance to raw coal, the Bed for Fine Coal after pre- classification carries out deep screening in the Relaxation sieve-plate of lower layer.The screen(ing) machine can carry out deep screening to raw coal without configuring pre- sieve apparatus, effectively reduce the screening cost of raw coal.

Description

A kind of double-layer banana type vibration flip flop screen

Technical field

The double-layer banana type that the present invention relates to a kind of for carrying out dry deep-sizing to moist fine particulate coal vibrates tension and relaxation Sieve, belongs to screening plant technical field.

Background technique

Due to raw coal fully mechanized mining technology etc., fine particle content increases in raw coal, in addition the dust-proof water spray in underground, coal The reason of layer infiltration and management etc., increase raw coal moisture, plug-hole when leading to moist fine particulate coal dry deep-sizing Or the viscous phenomenon of paste is serious, common vibrating screen is difficult to complete this screening task.

A kind of high-efficiency appliance of the flip flop screen as moist fine particulate coal dry deep-sizing, occupies in coal preparation Consequence.Flip flop screen be made of being improved on the basis of common vibrating screen used more complicated screening principle and Material sieving technology, screen(ing) machine are mainly made of fixed screen frame and floating screen frame, elastic polyurethane sieve, and two kinds of screen frames pass through elastic device It links together, elastic polyurethane sieve one end is fixed on fixed screen frame, and the other end is fixed on floating screen frame.Screen(ing) machine is swashing Under power of shaking effect, relative motion is generated between fixed screen frame and floating screen frame, elastic polyurethane sieve forms periodic tension and relaxation Movement, sieve is thus to obtain higher acceleration and biggish deflection deformation.It the higher acceleration of the compass screen surface of flip flop screen and scratches greatly Degree deformation is similar to " trampoline " effect so that the material accelerated energy on compass screen surface reaches 40g or more, material flip flop screen very greatly It is easy to loose and layering under the action of speed, is conducive to improve screening effect, effectively eliminates the viscosity of moisture between coal particles Influence of the impurity such as power and the soil of attachment to screening efficiency, and the deformable squeeze of compass screen surface also can effectively prevent particle obstruction sieve Hole.

Flip flop screen is mainly used for the deep screening of the 6mm or 13mm of moist fine particulate coal.Since flip-flow screening machine compass screen surface is a kind of The elastomer of exoskeletal type, for the lump coal of granularity 80mm or more, elastic screen surface cannot be thrown, and therefore, speed to open to improve The screening effect of sieve needs to control the granularity into flip-flow screening machine coal.In coal preparation industry, the selected original from mine The granularity of coal is bigger, through entering back into flip-flow screening machine after classifying screen pre-screening after raw coal is broken.

Application No. is 201320019829.7 patent documents to disclose a kind of linear oscillator mono-layer banana flip flop screen, application Number a kind of linear oscillator bilayer flip flop screen, the common ground of both flip flop screens are disclosed for 201320019957.1 patent document It is to be connected between floating screen frame and main screen frame by shear spring.Shear spring for a long time bear shearing force effect be easy to by Tearing, meanwhile, the effect of shearing force can make rubber generate heat, and harden and become fragile so as to cause rubber, or even failure, and influence screen(ing) machine can By property.

In conclusion main problem existing for traditional flip flop screen has：（1）Flip-flow screening machine has certain requirement to material size, Raw coal needs to configure classifying screen progress pre-screening to increase equipment investment and improves raw coal before entering flip-flow screening machine Sieve cost；（2）It is connected between floating screen frame and fixed screen frame using shear spring, shear spring is easy by the effect of shearing force It being torn, failure rate is higher, meanwhile, the effect of shearing force is so that the shear spring of rubber material generates heat, so as to cause its hair Cirrhosis is crisp, or even failure, influences the reliability of screen(ing) machine.

Summary of the invention

It can be to raw coal without configuring pre- sieve apparatus it is an object of the invention to aiming at the disadvantages of the prior art, provide one kind The double-layer banana type for carrying out deep screening vibrates flip flop screen, to reduce the screening cost of raw coal.

To achieve the above object, the present invention adopts the following technical scheme that：

A kind of double-layer banana type vibrates flip flop screen, includes layer screening box, excitation system, drive system and support in composition, described Layer screening box includes two side plates, pan feeding beam, reciprocal sieve plate and Relaxation sieve-plate, and two side plates are parallel to each other and to pass through spring vertical On the support, the reciprocal sieve plate and Relaxation sieve-plate are mounted between two side plates and reciprocal sieve plate is located at Relaxation sieve-plate for installation Top, the pan feeding beam are located above the feed end of reciprocal sieve plate and are fixed on two side plates, and the excitation system is mounted on It is connect in driving beam between two side plates and with drive system.

Above-mentioned double-layer banana type vibrates flip flop screen, and the Relaxation sieve-plate includes two float plates, multiple fixed beams, Duo Gefu Dynamic beam, multiple Flexible sieves and the support of multiple elastic rockers, two float plates are located at the outside of two side plates, each floating Plate is supported by multiple elastic rockers and is connected with corresponding side plate, and multiple fixed beams are alternatively arranged with multiple floating beams along camber line, The both ends of each fixed beam are connect with the lower part of two side plates respectively, and the both ends of each floating beam pass through the through-hole on two side plates It is connect respectively with two float plates afterwards, a Flexible sieve is installed between every two adjacent fixed beam and floating beam.

Above-mentioned double-layer banana type vibrates flip flop screen, and the reciprocal sieve plate includes multiple sieve plates and multiple crossbeams, multiple crossbeams Be parallel to each other and arranged along camber line, the both ends of each crossbeam are fixedly connected with two side plates respectively, every two adjacent crossbeam it Between install a sieve plate.

Above-mentioned double-layer banana type vibrates flip flop screen, and the excitation system includes two groups of forcing synchronization molding box formula vibration excitors and ten thousand To transmission shaft, two groups of forcing synchronization molding box formula vibration excitors are connected by universal drive shaft and are separately mounted to the both ends of driving beam, One group of forcing synchronization molding box formula vibration excitor therein is connected with drive system.

Above-mentioned double-layer banana type vibrates flip flop screen, and each elastic rocker support includes support arm and two rocking levers, each Rocking lever includes square tube and square steel, and the square steel coaxial package is inside square tube and between the side of square steel and the side wall of square tube Angle is 45 °, the gap between the inner wall and square steel of square tube by rubber filling, the square steel of two rocking levers respectively with side plate and floating Movable plate is fixedly connected, and is fixedly connected between the square tube of two rocking levers by support arm.

Above-mentioned double-layer banana type vibrates flip flop screen, and the drive system includes motor, tensioning base, small belt pulley, great Pi Belt wheel and belt, the motor are mounted on tensioning base, and the small belt pulley is mounted on the output shaft of motor, the great Pi Belt wheel is mounted in the drive shaft of forcing synchronization molding box formula vibration excitor, is connected between small belt pulley and big belt pulley by belt.

Above-mentioned double-layer banana type vibrates flip flop screen, and the tensioning base includes motor mounting plate, elastic bearing-axis, long spiral shell Bar, tensioning apparatus and two side support plates, the elastic bearing-axis include the sky of interior square shaft and coaxial package in the middle part of interior square shaft Heart square shaft, the angle between the side wall of the two is 45 °, the gap between the interior square shaft and hollow square shaft by elastomer-filled, The fixed motor mounting plate in hollow square shaft top；Two side support plates are fixed on retainer（5）Above and respectively stick on interior side On two end faces of axis, connected between two side support plates and interior square shaft by long bolt；The tensioning apparatus includes two angles Adjustable plate is spent, the two is set with by the square hole to match with interior square shaft at the both ends of interior square shaft, and each angle adjustment plate is equal If two clamping screws pass through the through-hole in long arc-shaped holes and corresponding side support plate on angle adjustment plate there are two clamping screw Afterwards by nut check.

Above-mentioned double-layer banana type vibrates flip flop screen, and each angle adjustment plate of the tensioning apparatus, which is equipped with, adjusts head and tune Whole bolt, the edge for adjusting head and being connected to angle adjustment plate, the adjustment bolt, which screws in, adjusts head and corresponding side support plate On fixing seat threaded hole in.

Above-mentioned double-layer banana type vibrates flip flop screen, is equipped with multiple reinforcing beams, institute between two side plates of the layer screening box The both ends for stating reinforcing beam are fixedly connected with the top of two side plates respectively.

Above-mentioned double-layer banana type vibrates flip flop screen, and the both ends of the Flexible sieve are connected by card slot and fixed beam and floating beam It connects, card slot position corresponding with the middle part of fixed beam or floating beam is linear, the both ends with fixed beam and floating beam Corresponding position is to upper bend.

Above-mentioned double-layer banana type vibrates flip flop screen, by along each crossbeam cloth between the sieve plate and crossbeam of the reciprocal sieve plate The multiple clamping mechanisms connection set, each clamping mechanism includes support frame, supporting plate and rail chair, and the supporting plate is fixed by support frame On crossbeam, the lower part of the rail chair is connect by bolt with supporting plate, and top is set there are two clamping joint, and two clamping joints block respectively Enter in the card hole on the sieve plate of crossbeam two sides.

Above-mentioned double-layer banana type vibrates flip flop screen, and the hollow square shaft is connect by U-clamp plate with motor mounting plate, described U-clamp plate is sandwiched on hollow square shaft and is connect by bolt with motor mounting plate.

The present invention in screen box be provided with reciprocal sieve plate and Relaxation sieve-plate, under the action of excitation system, upper layer it is reciprocal Sieve plate does reciprocating linear vibration, and for being classified in advance to raw coal, the Bed for Fine Coal after pre- classification is carried out in the Relaxation sieve-plate of lower layer Deep screening.The screen(ing) machine can carry out deep screening to raw coal without configuring pre- sieve apparatus, effectively reduce being sieved into for raw coal This.

Using elastic rocker support connection between the side plate of float plate and layer screening box of the invention, inner rubber is to squeeze Based on compressive strain, compared with traditional shear spring, that is, service life is extended, and the amplitude of float plate can be increased.The screen(ing) machine Using forcing synchronization molding box formula vibration excitor as exciting source, failure rate is substantially reduced, and substantially increases the reliability of screen(ing) machine.

Detailed description of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is main view of the invention；

Fig. 2 is left view of the invention；

Fig. 3 is the structural schematic diagram of layer screening box；

Fig. 4 is the structural schematic diagram of reciprocal sieve plate；

Fig. 5 is the structural schematic diagram of rail chair；

Fig. 6 is Relaxation sieve-plate Local map；

Fig. 7 is scheme of installation of the card slot in fixed beam；

Fig. 8 is elastic rocker support construction schematic diagram, wherein Fig. 8（b）It is Fig. 8（a）Left view；

Fig. 9 is tensioning base main view；

Figure 10 is tensioning base left view；

Figure 11 is elastic bearing-axis structure chart, wherein Figure 11（b）It is Figure 11（a）Left view；

Figure 12 is tensioning device structure figure.

It is marked in figure as follows：

1, layer screening box, 2, excitation system, 3, drive system, 4, support, 5, retainer（5）, 6, forcing synchronization molding box formula exciting Device, 7, universal drive shaft, 8, side plate, 9, reinforcing beam, 10, driving beam, 11, pan feeding beam, 12, reciprocal sieve plate, 13, Relaxation sieve-plate, 14, crossbeam, 15, support frame, 16, supporting plate, 17, rail chair, 18, sieve plate, 19, fixed beam, 20, floating beam, 21, float plate, 22, bullet Property rocker arm support, 23, card slot, 24, Flexible sieve, 25, the special-shaped tent of elasticity, 26, clamping joint, 27, adjustment bolt, 28, fixed Seat, 29, bolt, 30, rocking lever, 31, support arm, 32, square tube, 33, square steel, 34, rubber, 35, mounting hole, 36, tensioning base, 37, motor, 38, small belt pulley, 39, belt, 40, big belt pulley, 41, motor mounting plate, 42, side support plate, 43, resilient support Axis, 44, clamping screw, 45, long bolt, 46, U-clamp plate, 47, hollow square shaft, 48, interior square shaft, 49, elastomer, 50, angle tune Save plate, 51, adjusting head.

Specific embodiment

Referring to Fig. 1 Fig. 2 and Fig. 3, the invention mainly comprises layer screening box 1, excitation system 2, drive system 3, support 4 and pass Dynamic seat（5）5.Layer screening box is by side plate 8, reinforcing beam 9, driving beam 10, pan feeding beam 11, reciprocal sieve plate 12, Relaxation sieve-plate 13 etc. The space net structure of composition；Excitation system 2 is made of forcing synchronization molding box formula vibration excitor 6, universal drive shaft 7 etc., two groups strong Compel the box vibration excitor 6 of synchronized model to be mounted in driving beam 10, be connected between the two by universal drive shaft 7；Excitation system 2 and drive Dynamic system 3 is connected；Layer screening box 1, drive system 3 are separately mounted to support 4, retainer（5）On 5；It is generated in excitation system 2 Under the effect of harmonic excitation power, layer screening box 1 does reciprocating linear vibration along the direction horizontal by certain angle.

Referring to Fig. 4 and Fig. 5, the reciprocal sieve plate 12 is by groups such as crossbeam 14, support frame 15, supporting plate 16, rail chair 17, sieve plates 18 At.14 rectangular cross-section structure of crossbeam, 14 both ends of the surface of crossbeam pass through bolt and a series of 8 closely coupled, the crossbeams in inside of both side plate 14 are equally spaced in arc line shaped；Support frame 15 is the inverted " t " type structure being welded by steel plate, and supporting plate 16 is by steel plate bending Made of " Γ " type structure, support frame 15 is mounted on crossbeam 14, and supporting plate 16 is fitted closely with 15 one side of support frame, rail chair 17 It is mounted on 16 upper surface of supporting plate, sieve plate 18 is connect with rail chair 17.

17 top of rail chair is set there are two elastic polyurethane strip 26 side by side, and the top of each strip 26 is arcuate structure, And upper part is wider than lower part, and two sides are inverted steps face, and strip 26 with sieve plate 18 for connecting.17 lower part of rail chair pours Bolt 29, for being connected with supporting plate 16；Sieve plate 18 is polyurethane pouring structure, and 18 both ends of sieve plate are respectively provided with row's inner section and card The slot that section matches, the slot of 18 one end of adjacent two pieces of sieve plates are separately mounted on two strips of the same rail chair 17.

Referring to Fig. 6 and Fig. 7, the Relaxation sieve-plate 13 is supported by fixed beam 19, floating beam 20, float plate 21, elastic rocker 22, the special-shaped tent 25 of card slot 23, Flexible sieve 24, elasticity forms.19 rectangular cross-section structure of fixed beam, 19 both ends of the surface of fixed beam Closely coupled by bolt and 8 inside of both side plate, a series of fixed beams 19 are equally spaced in arc line shaped；Floating beam 20 is located at two In side plate 8, and 20 flange outer end face of floating beam and 8 inside of side plate, there are certain gap, two pieces of float plates 21 are tightly attached to respectively On the outside of both side plate 8,21 closed position of float plate is provided with a series of rectangular through holes, 20 liang of end flanges outer ends of floating beam on side plate 8 The slot that bolt on face is placed through on side plate 8 be located at side plate on the outside of float plate 21 be connected, floating beam 20 with consolidate It is equidistant in arc line type arranged for interval to determine beam 19.

Sieve card slot 23 is installed, 23 both ends of sieve card slot are arc, and middle position is in fixed beam 19 and floating beam 20 Linear, the section of sieve card slot 23 are similar equilateral triangle structure, and the both ends of Flexible sieve 24 have and 23 section of card slot The section matched, same 24 both ends of Flexible sieve are separately mounted to fixed beam 19, in the card slot 23 on floating beam 20, same The end of two Flexible sieves 24 in a sieve card slot 23 is compressed with the special-shaped tent 25 of elasticity.

Referring to Fig. 8, elastic rocker support 22 is made of two rocking levers 30 and support arm 31, and 30 section of rocking lever is side Shape, support arm 31 are plate, and upper/lower terminal is equipped with and the consistent groove in 30 section of rocking lever, and two rocking levers 30 are solid respectively Dingan County is in the groove at 31 both ends of support arm.

Rocking lever 30 is made of square tube 32, the rubber 34 of square steel 33 and vulcanization between the two, and 32 section of square tube is Fang Huan, side 33 section of steel is solid squares, and square steel 33 is concentrically disposed in inside square tube 32, and square steel 33 rotates 45 ° of orientation relative to square tube 32 32 certain distance of square tube is stretched out in angle, 33 end of square steel.

Series installation hole 35 is provided on 33 one end end face of square steel, mounting hole 35 is the circular hole with certain depth, and every The internal screw thread with certain depth is processed in a circular hole.

Connection of the mounting hole 35 for elastic rocker support 22 and side plate 8 and float plate 21 on layer screening box 1, elasticity are shaken 33 end face of square steel in arm support 22 is connected with side plate 8 by bolt, the floating of another square steel 33 end face and respective side Plate 21 is connected by bolt.

Referring to Fig. 2, drive system 3 is by tensioning base 36, motor 37, small belt pulley 38, belt 39,40 groups of big belt pulley At motor 37 is mounted on tensioning base 36, and small belt pulley 38 is mounted on the output shaft of motor 37, and big belt pulley 40 is mounted on In the drive shaft of forcing synchronization type vibration excitor 6, small belt pulley 38 is connected with big belt pulley 40 by belt 39.

Referring to Fig. 9, Figure 10 and Figure 11, tensioning base 36 by motor mounting plate 41, side support plate 42, elastic bearing-axis 43, Tensioning apparatus, long bolt 45, U-clamp plate 46 form；Motor mounting plate 41 is fixed on elastic bearing-axis 43 by U-clamp plate 46 On；Elastic bearing-axis 43 is mounted in the side support plate 42 that two sections are L-shaped structure by long bolt 45；Tensioning apparatus point Not be fixedly connected with elastic bearing-axis 43 and side support plate 42；By adjusting tensioning apparatus, adjustable motor mounting plate 41 inclines Angle.

Elastic bearing-axis 43 is made of hollow square shaft 47, interior square shaft 48, elastomer 49；Hollow 47 section of square shaft is hollow side Shape structure, interior 48 section of square shaft are solid squares structure；Interior square shaft 48 is concentrically disposed in inside hollow square shaft 47, and interior square shaft 48 45 ° of azimuths are rotated relative to hollow square shaft 47；Hollow 47 certain distance of square shaft is stretched out at interior 48 both ends of square shaft, is used for and tensioning apparatus Connection；Interior 48 center of square shaft is equipped with elongated internal thread hole, and long bolt 45 is installed in internal thread hole, and 45 both ends of long bolt are stretched out Threaded hole certain distance, for being connected with side support plate 42.

Tensioning apparatus is made of angle adjustment plate 50, adjusting head 51, adjustment bolt 27, fixing seat 28 etc., by that will adjust Bolt 27 is spun up downward or upward, the rotation angle of adjustable angle adjustable plate 50.

Angle adjustment plate 50 is fan shape structure, and fan-shaped top arc center is equipped with rectangular for fixing with interior square shaft 48 Hole, fan-shaped bottom are equipped with the long arc-shaped holes for connecting with side support plate 42, and fan-shaped bottom end is equipped with and is used for and adjusts first 51 The circular hole of connection.

It adjusts 51 side end of head and is equipped with the circular hole for being used for connecting with the fan-shaped bottom end of angle adjustment plate 50, upper and lower end Face is equipped with the internal thread through hole for connecting with adjustment bolt 27.

Fixing seat 28, which is located at, to be adjusted immediately below head 51,28 section Wei " ∟ of fixing seat " type structure, 28 upper surface of fixing seat is set Have an internal thread through hole for connecting with adjustment bolt 27,28 lower end of fixing seat and side respectively with the bottom surface of side support plate 42 and Side welds together.

The present invention is under the action of excitation system, it can be achieved that the reciprocal sieve plate in upper layer does reciprocating linear vibration, lower layer's flip flop screen Plate does periodic tensioner, relaxation exercise；Upper layer is classified in advance for raw coal, and lower layer is used for the deep screening of particulate raw coal, upper layer Sieve plate control enters the granularity of lower layer's sieve plate material, and it is pre- not need reconfiguration classifying screen progress before entering flip-flow screening machine for raw coal Screening, simplifies screening system, saves production cost.

The reciprocal sieve plate in upper layer pours rail chair using double card head polyurethane and fixes, solid and reliable, convenient for disassembly and assembly, noise It is low.Lower layer's float plate and side sheet room are using elastic rocker support connection, compared with shear spring, on the one hand, when screen(ing) machine works, bullet Property rocker arm support in rubber deformation state based on being squeezed and deformed, since shearing force greatly reduces, thus rubber use the longevity Life dramatically increases, and improves the reliability of screen(ing) machine；On the other hand, elastic rocker support and control float plate only does straight-line oscillation, together When two square steel being connected with screen frame and float plate between there is certain center away from can produce biggish circle in vibration Arc, thus biggish amplitude can be provided to float plate, to improve the processing capacity of screen(ing) machine.

Screen(ing) machine drive system configures tensioning base, and belt adjustment is more convenient, while belt can be made to be maintained at suitable for a long time Tensioning state, ideal belt tension is provided, belt is effectively prevent to relax, avoid belt overheat skid, to mention The high transmission efficiency of drive system, and extend the service life of belt.

Claims (12)

1. a kind of double-layer banana type vibrates flip flop screen, characterized in that include layer screening box in composition（1）, excitation system（2）, drive Dynamic system（3）And support（4）, the layer screening box（1）Including two side plates（8）, pan feeding beam（11）, reciprocal sieve plate（12）And relaxation Open sieve plate（13）, two side plates（8）It is parallel to each other and passes through spring and be vertically installed at support（4）On, the reciprocal sieve plate（12） And Relaxation sieve-plate（13）It is mounted on two side plates（8）Between and reciprocal sieve plate（12）Positioned at Relaxation sieve-plate（13）Top, it is described Pan feeding beam（11）Positioned at reciprocal sieve plate（12）Feed end above and be fixed on two side plates（8）On, the excitation system（2）Peace Mounted in two side plates（8）Between driving beam driving beam（10）Upper and and drive system（3）Connection.

2. a kind of double-layer banana type according to claim 1 vibrates flip flop screen, characterized in that the Relaxation sieve-plate（13）Packet Include two float plates（21）, multiple fixed beams（19）, multiple floating beams（20）, multiple Flexible sieves（24）With multiple elastic rockers Support（22）, two float plates（21）It is located at two side plates（8）Outside, each float plate（21）It is shaken by multiple elasticity Arm support（22）With corresponding side plate（8）Connection, multiple fixed beams（19）With multiple floating beams（20）It is alternatively arranged along camber line, often A fixed beam（19）Both ends respectively with two side plates（8）Lower part connection, each floating beam（20）Both ends pass through two sides Plate（8）On through-hole after respectively with two float plates（21）Connection, every two adjacent fixed beam（19）With floating beam（20）It Between install a Flexible sieve（24）.

3. a kind of double-layer banana type according to claim 1 or 2 vibrates flip flop screen, characterized in that the reciprocal sieve plate （12）Including multiple sieve plates（18）With multiple crossbeams（14）, multiple crossbeams（14）It is parallel to each other and is arranged along camber line, each crossbeam （14）Both ends respectively with two side plates（8）It is fixedly connected, every two adjacent crossbeam（14）Between install a sieve plate（18）.

4. a kind of double-layer banana type according to claim 3 vibrates flip flop screen, characterized in that the excitation system（2）Packet Include two groups of forcing synchronization molding box formula vibration excitors（6）And universal drive shaft（7）, two groups of forcing synchronization molding box formula vibration excitors（6）Pass through Universal drive shaft（7）It is connected and is separately mounted to driving beam（10）Both ends, one group of forcing synchronization molding box formula vibration excitor therein （6）With drive system（3）It is connected.

5. a kind of double-layer banana type according to claim 4 vibrates flip flop screen, characterized in that each elastic rocker support （22）Including support arm（31）With two rocking levers（30）, each rocking lever（30）Including square tube（32）And square steel（33）, described Square steel（33）Coaxial package is in square tube（32）Internal and square steel（33）Side and square tube（32）Side wall between angle be 45 °, square tube（32）Inner wall and square steel（33）Between gap by rubber（34）Filling, two rocking levers（30）Square steel（33） Respectively with side plate（8）And float plate（21）It is fixedly connected, two rocking levers（30）Square tube（32）Between pass through support arm（31） It is fixedly connected.

6. a kind of double-layer banana type according to claim 5 vibrates flip flop screen, characterized in that the drive system（3）Packet Include motor（37）, tensioning base（36）, small belt pulley（38）, big belt pulley（40）And belt（39）, the motor（37）Installation In tensioning base（36）On, the small belt pulley（38）It is mounted on motor（37）Output shaft on, the big belt pulley（40）Peace Mounted in forcing synchronization molding box formula vibration excitor（6）Drive shaft on, small belt pulley（38）With big belt pulley（40）Between pass through belt （39）It is connected.

7. a kind of double-layer banana type according to claim 6 vibrates flip flop screen, characterized in that the tensioning base（36）Packet Include motor mounting plate（41）, elastic bearing-axis（43）, long bolt（45）, tensioning apparatus and two side support plates（42）, the bullet Property support shaft（43）Including interior square shaft（48）With coaxial package in interior square shaft（48）The hollow square shaft at middle part（47）, the side wall of the two Between angle be 45 °, the interior square shaft（48）With hollow square shaft（47）Between gap by elastomer（49）Filling, the sky Heart square shaft（47）Motor mounting plate is fixed on top（41）；Two side support plates（42）It is fixed on retainer（5）Above and respectively recline In interior square shaft（48）Two end faces on, two side support plates（42）With interior square shaft（48）Between pass through long bolt（45）Connection； The tensioning apparatus includes two angle adjustment plates（50）, the two by with interior square shaft（48）The square hole to match is set in Interior square shaft（48）Both ends, each angle adjustment plate（50）Clamping screw there are two being all provided with（44）, two clamping screws（44）It wears Over-angle adjustable plate（50）On long arc-shaped holes and corresponding side support plate（42）On through-hole after by nut check.

8. a kind of double-layer banana type according to claim 7 vibrates flip flop screen, characterized in that each of described tensioning apparatus Angle adjustment plate（50）It is equipped with adjusting head（51）And adjustment bolt（27）, the adjusting head（51）It is connected to angle adjustment plate （50）Edge, the adjustment bolt（27）It screws in and adjusts head（51）With corresponding side support plate（42）On fixing seat（28）Spiral shell In pit.

9. a kind of double-layer banana type according to claim 8 vibrates flip flop screen, characterized in that the layer screening box（1）'s Two side plates（8）Between be equipped with multiple reinforcing beams（9）, the reinforcing beam（9）Both ends respectively with two side plates（8）Top it is solid Fixed connection.

10. a kind of double-layer banana type according to claim 9 vibrates flip flop screen, characterized in that the Flexible sieve（24） Both ends pass through card slot（23）With fixed beam（19）And floating beam（20）Connection, the card slot（23）With fixed beam（19）Or it floats Beam（20）The corresponding position in middle part be linear, with fixed beam（19）And floating beam（20）The corresponding position in both ends to Upper bend.

11. a kind of double-layer banana type according to claim 10 vibrates flip flop screen, characterized in that the reciprocal sieve plate（12） Sieve plate（18）With crossbeam（14）Between by along each crossbeam（14）Multiple clamping mechanisms connection of arrangement, each clamping mechanism Including support frame（15）, supporting plate（16）And rail chair（17）, the supporting plate（16）Pass through support frame（15）It is fixed on crossbeam（14）On, The rail chair（17）Lower part pass through bolt（29）With supporting plate（16）Connection, top are set there are two clamping joint（26）, two clampings Head（26）It is respectively clamped into crossbeam（14）Two sides sieve plate（18）On card hole in.

12. a kind of double-layer banana type according to claim 11 vibrates flip flop screen, characterized in that the hollow square shaft（47） Pass through U-clamp plate（46）With motor mounting plate（41）Connection, the U-clamp plate（46）It sandwiches in hollow square shaft（47）It goes up and passes through Bolt and motor mounting plate（41）Connection.