CN208912506U - The spin vibration sieve of Novel screen stretching structure - Google Patents

Abstract

A kind of spin vibration sieve of Novel screen stretching structure, it includes pedestal, vibration mounting, bottom sieve frame, several middle screen frames, upper screen frame and sieve top cover, bottom sieve frame, a Screen assemblies are mounted between several middle screen frames and upper screen frame, Screen assemblies include annular rack and sieve, radial convex is equipped with a loop flange on the lower end outer ring surface of annular rack, the one end intersected on the external annulus of annular rack with collar flange upper side offers annular caulking groove, the compatible slotted collar for being embedded with an elasticity in annular caulking groove, sieve pad is clipped between annular caulking groove and slotted collar, the radial outside of annular rack is arranged with a garter spring for sticking on collar flange upper side, the internal diameter of garter spring and the outer diameter of annular rack match, the outer diameter of garter spring and the outer diameter of collar flange are identical, and the axial height of garter spring is more than the notch center of annular caulking groove Height.

Description

The spin vibration sieve of Novel screen stretching structure

Technical field

The utility model relates to materials to sieve production equipment field, particularly relate to one kind and be used for during recycling noble metal Sieve the spin vibration sieve of the Novel screen stretching structure of noble metal extract.

Background technique

Spin vibration sieve is that a kind of relative good accuracy fine powder sieving is mechanical, low noise, high-efficient, and quick net exchanging needs 3-5 minutes, Full-closed structure, the screening suitable for materials such as grain, powder, mucus are filtered.Spin vibration sieve is to make exciting source by vertical type motor, straight Vertical motor upper/lower terminal is equipped with eccentric hammer, and the rotary motion of motor is changed into horizontal, vertical, inclined three-D and is transported It is dynamic, then this movement is passed to compass screen surface.The phase angle of upper/lower terminal is adjusted, so as to change fortune of the material on compass screen surface Dynamic rail mark.It is dissolved after needing to be roasted in the waste material containing precious metal element during recycling noble metal, therefore in order to Roasting is thoroughly and dissolution is abundant, it is therefore desirable to be crushed waste material, and broken waste material is sieved, will screen out Fine powder material investment next step extraction procedure in.When sieving the waste material containing precious metal element, above-mentioned rotation can be generally used Vibration sieve carries out thickness screening to the waste material of crushing, the pulling-over fixed structure in traditional spin vibration sieve between sieve and cyclic annular rack Are as follows: a pushing out ring, the internal diameter of the internal diameter of pushing out ring and cyclic annular rack are welded by modes such as welding on the upper surface of cyclic annular rack Identical, outer diameter is less than the outer diameter of cyclic annular rack, keeps the whole cross section of pushing out ring and cyclic annular rack composition L-shaped, in the ring-type Radial outside on the upper surface of rack corresponding to the pushing out ring opens up annular groove, then passes through one and the annular groove Adaptable snap ring winding screen periphery be embedded in the annular groove together, sieve is propped up into a net using the pushing out ring Face, and the internal diameter of pushing out ring outer diameter and screen frame matches, thus wire side can Shen enter and flushed in the sieve basket of upside with discharge port, by The snap ring the taut edge pressure downwardly turned over later on the pushing out ring that is located at will be stuck in the annular groove on the sieve In, realize stretching fix, and by the ring network is rack-mounted fit in spin vibration sieve when, it is described ring-type rack on correspond to the support The outside part of ring diameter is folded between the connecting flange of upper and lower two screen frames, and then the snap ring is also limited in upside Between connecting flange and annular groove, so as to avoid the snap ring from jumping out from annular groove.

But sieve pulling-over structure as described above have the defects that it is certain because between snap ring and the annular groove Fixation is the connecting flange by extrusion friction and screen frame between snap ring and annular groove to the notch of the annular groove Closure, but before being assembled on screen frame after stretching, be easy move, vibrate or the reasons such as wire side stress cause because removing The snap ring is deviate from from the annular groove, needs stretching again, also, wrap up in one due to needing to cover on the cyclic annular rack The sealing rubber ring of U-shaped profile prevents the powder of screening for being sealed between the connecting flange and cyclic annular rack to screen frame Material leaks out, and the U-lag two sides of sealing rubber ring are sticked on respectively on the both sides of the face of the cyclic annular rack, and the one of the sealing rubber ring Side pad is located between the connecting flange of screen frame and a side end face of cyclic annular rack, therefore pressure holding of the connecting flange of screen frame to snap ring Will the gap of flexible loosening can pull sieve side when support material on the sieve, and under sifting vibrating effect Edge loosens the snap ring in the annular groove, and the tension in turn resulting in the sieve reduces, and slips and creates to screen periphery Condition has been made, has been unfavorable for continuing working.

Utility model content

The utility model provides a kind of spin vibration sieve of Novel screen stretching structure, and technical problem underlying to be solved is: On traditional circular impact screen, pulling-over fixed structure existing defects between sieve and cyclic annular rack, sieve long-time support Fixed installation structure between material and wire side stress meeting garnetting screen periphery and cyclic annular rack causes sieve to lose tension, sieve Network edge is easy to pull, and influences the progress for continuing screening work.

In order to solve the above technical problems, the technical solution adopted in the utility model is to provide a kind of rotation of Novel screen stretching structure Vibration sieve comprising pedestal, vibration mounting, bottom sieve frame, several middle screen frames, upper screen frame and sieve top cover, the bottom sieve frame, Ruo Ganzhong Top cover is successively axially stacked from the bottom to top is mounted on the vibration mounting for screen frame, upper screen frame and sieve, the bottom sieve frame, several The axial ends of middle screen frame and upper screen frame all has connecting flange, every in the bottom sieve frame, several middle screen frames and upper screen frame It is mounted on a Screen assemblies between two connecting flanges axially docked, the Screen assemblies include annular rack and taut set Sieve in the annular rack upper surface, one side to overturn of external annulus from the edge of the sieve to the annular rack, The outer diameter of the annular rack matches plus the sum of overturning to the screen thickness of external annulus surrounding and the internal diameter of the upper screen frame, It is described annular rack lower end outer ring surface on radial convex be equipped with a loop flange, it is described annular rack external annulus on it is described One end of collar flange upper side intersection offers annular caulking groove, compatible in the annular caulking groove to be embedded with opening for an elasticity Mouthful snap ring, the sieve turn over go to the corresponding annular caulking groove part pad be clipped in the annular caulking groove and slotted collar it Between, the radial outside of the annular rack is arranged with a garter spring for sticking on the collar flange upper side, the garter spring it is interior The outer diameter of diameter and the annular rack matches, and the outer diameter of the garter spring is identical as the outer diameter of the collar flange, and the hoop The axial height of ring is more than the height of the notch center of the annular caulking groove.

Further, the side internal groove side wall of lower section and the upper side of the collar flange are corresponded to same in the annular caulking groove In plane, the collar extension of the slotted collar is closed the diameter of the annular punching track of the circle diameter to be formed and the annular caulking groove Match, it is described annular caulking groove depth and width of rebate with one layer of screen mesh shape of the ring body winding up of the slotted collar At whole cross-sectional diameter match, the width of rebate of the axial height of the garter spring no more than the annular caulking groove.

In addition, being located at pad on the sieve is clipped in the annular caulking groove with the marginal portion other than slotted collar around described Slotted collar backrush is pierced by between the slotted collar and garter spring, and the marginal portion of the sieve forms 360 degree and is wrapped in institute The structure in slotted collar is stated, the marginal portion for being piercing in the sieve between the slotted collar and garter spring is overturn again to be pasted On the upper surface of the garter spring, the garter spring is folded in corresponding two connection methods being axially mutually butted with collar flange Between orchid, and the sealing rubber ring for being wrapped with a U-shaped profile channel-shaped is covered on the garter spring and collar flange, on the sealing rubber ring The opening of U-lag shape is located on radially inner side wall, and the two sides cell wall of U-lag is respectively coated by the garter spring on the sealing rubber ring Upper surface and collar flange downside on.

Discharge port, the sieve top cover are offered on the screen frame side wall of the bottom sieve frame, several middle screen frames and upper screen frame Middle part be provided with feeding port, and every two axial direction phase in the bottom sieve frame from the bottom to top, several middle screen frames and upper screen frame The aperture of sieve described in each Screen assemblies of corresponding installation is gradually increased from the bottom to top between the connecting flange mutually docked.

The pedestal is cylindrical, and radial convex is equipped with cricoid connection in the upper end outer axial face of the cylindric pedestal Ring flat-plate, the multiple vibrating springs that are fixedly installed connected on ring flat-plate around central axis circular array, the vibration branch Seat is in the form of annular discs, the discoid vibration mounting and the pedestal it is coaxial be fixedly connected on the upper of multiple vibrating springs It holds, is fixedly installed a vibrating seat in the middle part of the vibration mounting, a vertical vibrating motor is fixedly installed in the vibrating seat, The connecting flange of bottom sieve frame lower end is axially matched with the edge of the discoid vibration mounting and is bonded, bottom sieve frame lower end Connecting flange and the discoid vibration mounting edge on be socketed with the V-shaped connection beam ring in a cross section.

Moreover, being socketed on the connecting flange that every two is axially docked in the bottom sieve frame, several middle screen frames and upper screen frame There is the connection beam ring that a cross section is V-shaped, the upper end connecting flange and the edge of sieve top cover of the upper screen frame are mutually matched The V-shaped connection in a cross section is also socketed on fitting, the upper end connecting flange of the upper screen frame and the edge of sieve top cover Beam ring, wherein also set is wrapped with the sealing rubber ring of a U-shaped profile channel-shaped on the upper end connecting flange of the upper screen frame.

In each middle screen frame it is co-axially fixed be connected with one be in back taper tubular feed back disk, back taper tubular The cone feather edge of the feed back disk is fixedly connected on the position on the inner sidewall of the middle screen frame close to upper end, the feed back disk Semi-cone angle be 80-84 degree, and the vertex of a cone edge on the feed back disk and between lower screens have punishment in advance gap.

Particularly, on the collar flange around central axis circular array be provided at least three wear connect hole, The lower end surface of the garter spring and at least three screws, which are worn, to be connected the corresponding position in hole and offers threaded connection hole respectively, each pair of It wears to connect in hole and threaded connection hole to wear described in answering and is connected to a screw.

Compared with prior art, the utility model has the beneficial effects that

1, by by the edge winding up of sieve in slotted collar, in the bullet of radial dilatation or contraction by slotted collar Property deformability the edge winding of sieve is caught in the annular caulking groove being provided in annular rack outer axial face, and utilize diameter The garter spring being located on the annular rack to hoop radially stops to limit the slotted collar radial dilatation, reaches guarantee opening Snap ring and annular caulking groove are fastened on screen periphery firmly on the annular rack clamping force of screen periphery, and Sieve can further increase the stability of pulling-over structure by overturning convolution several times, prevent the slotted collar with it is described Sieve slips in the case that clamp structure is stablized between annular caulking groove, to adequately ensure that the pulling-over stabilized structure of sieve Property；

2, the utility model has the advantages of simple structure, will not in handling process after the garter spring covers on the annular rack It loosens easily, even if axial dipole field once in a while, described open can be limited as long as the range that will not leave the annular caulking groove completely Mouth snap ring will not dehisce to cause the stretching structure of sieve to loosen, and there are also be exactly when the garter spring is mounted to together with collar flange When between the connecting flange that every two is axially docked in the bottom sieve frame, several middle screen frames and upper screen frame, upper and lower both direction The connecting flange being mutually butted can further clamp the garter spring and collar flange, not only completed the installation of Screen assemblies but also guaranteed Garter spring fixes the limit of slotted collar, therefore easy for installation.

Detailed description of the invention

Fig. 1 is the overall structure partial schematic sectional view of the utility model.

Fig. 2 is the partial structurtes schematic cross-sectional view of the utility model.

Fig. 3 is Fig. 1, in 2 A partial enlargement structural representation.

Fig. 4 is Fig. 1, in 2 B partial enlargement structural representation.

Specific embodiment

Below with reference to attached drawing 1-4 and preferred embodiment to the utility model proposes a kind of Novel screen stretching structure rotation Vibration sieve is described in greater detail.

As shown in Figure 1, 2, the utility model provides a kind of spin vibration sieve of Novel screen stretching structure comprising pedestal 1, vibration branch Seat 2, bottom sieve frame 3, middle screen frame 4 described in middle screen frame 4(quantity can increase according to actual needs, be one in figure), upper screen frame 5 with And sieve top cover 6, between 4 lower end of upper end and middle screen frame of the bottom sieve frame 3 and under 4 upper end of middle screen frame and upper screen frame 5 A Screen assemblies 10 are mounted between end, as shown in figure 3, the Screen assemblies 10 include annular rack 11 and taut are located at institute The sieve 12 of annular 11 upper surface of rack is stated, the edge of the sieve 12 is turned on one's side to the external annulus one of the annular rack 11 Turn, the edge that the upper surface of the annular rack 11 is intersected with external annulus is rounding corner structure, for preventing turn because 90 degree Angle is excessively sharp keen and tears the sieve 12, and the outer diameter of the annular rack 11 is thick plus the sieve 12 of overturning to external annulus surrounding The internal diameter of the sum of degree and the upper screen frame 5 matches, and (wherein, the bottom sieve frame 3 and middle screen frame 4 and upper screen frame 5 are inside and outside diameter The identical circular frame of specification), it is described annular rack 11 lower end outer ring surface on radial convex be equipped with a loop flange 13, the ring The one end intersected on the external annulus of shape rack 11 with 13 upper side of collar flange offers annular caulking groove 14, and the annular is embedding The compatible slotted collar 15 for being embedded with an elasticity in slot 14, the sieve 12, which turns over, goes to the corresponding annular caulking groove 14 Part pad is clipped between the annular caulking groove 14 and slotted collar 15, the upside internal groove side wall and annular rack of the annular caulking groove 14 The edge of 11 external annulus intersection is also equipped with rounding corner structure, and the radial outside of the annular rack 11 is arranged with one and sticks on The garter spring 16 of 13 upper side of collar flange, the internal diameter of the garter spring 16 and the outer diameter of the annular rack 11 match, institute The outer diameter for stating garter spring 16 is identical as the outer diameter of the collar flange 13, and the axial height of the garter spring 16 is more than that the annular is embedding Height of the notch center of slot 14 apart from 13 upper side of collar flange.The ring is limited using the garter spring 16 to reach Slotted collar 15 in shape caulking groove 14 is open expansion radially, and the slotted collar 15 is avoided to draw in the wire side stress of sieve 12 The lower elasticity of the effect of pulling struts and deviates from the annular caulking groove 14, and then the slotted collar 15 that can use elasticity is located at taut In annular caulking groove 14 described in the clip of the edge of the sieve 12 of 11 upper surface of the annular rack tightly.

Wherein, the Screen assemblies 10 between the bottom sieve frame 3 and middle screen frame 4 from the bottom to top and the middle screen frame 4 with The aperture of sieve 12 is gradually increased from the bottom to top in Screen assemblies 10 between upper screen frame, and then sieves screening material from top to bottom Grade is gradually increased.

Features described above practice processes are as follows: as shown in Fig. 2, the bottom sieve frame 3, middle screen frame 4, upper screen frame 5 and sieve top cover 6 by Under it is supreme it is successively axially stacked be mounted on the vibration mounting 2, the screen frame of the bottom sieve frame 3, middle screen frame 4 and upper screen frame 5 Offer discharge port 7 on side wall, the middle part of the sieve top cover 6 is provided with feeding port 61, the bottom sieve frame 3, middle screen frame 4 and The axial ends of upper screen frame 5 all has connecting flange 8, and the pedestal 1 is cylindrical, and the upper end of the cylindric pedestal 1 Radial convex is equipped with cricoid connection ring flat-plate 101 in outer axial face, surrounds central axis circular array on the connection ring flat-plate 101 Multiple vibrating springs 102 are fixedly installed, the vibration mounting 2 is in the form of annular discs, the discoid vibration mounting 2 and the bottom The coaxial upper end for being fixedly connected on multiple vibrating springs 102 of seat 1, the middle part of the vibration mounting 2 is fixedly installed one Vibrating seat 21 is fixedly installed with the preferred YZUL vertical vibrating motor of a vertical vibrating motor 22(in the vibrating seat 21), it is described The connecting flange 8 of 3 lower end of bottom sieve frame is axially matched with the edge of the discoid vibration mounting 2 and is bonded, 3 lower end of bottom sieve frame Connecting flange 8 and the discoid vibration mounting 2 edge on be socketed with the V-shaped connection beam ring 9 in a cross section, the company Connect two sides inner wall V-shaped on beam ring 9 tightly hold respectively 3 lower end of bottom sieve frame connecting flange 8 and the discoid vibration On the edge of support 2, ring diameter is reduced when the connection beam ring 9 radially collects under the pulling function of the connection bolt at circumferential both ends When, it is described to connect two sides inner wall V-shaped on beam ring 9 then during radially sliding under the axially opposing extruding bottom sieve frame 3 The edge of the connecting flange 8 at end and the discoid vibration mounting 2, realize it is axial is connected and fixed, also, the bottom sieve frame 3, in The V-shaped connection beam ring 9 in a cross section is socketed on the connecting flange 8 that every two is axially docked in screen frame 4 and upper screen frame 5, It is bonded as shown in figure 4, the upper end connecting flange 8 of the upper screen frame 5 is mutually matched with the edge of sieve top cover 6, the upper screen frame 5 It is also socketed with the V-shaped connection beam ring 9 in a cross section on the edge of upper end connecting flange 8 and sieve top cover 6, the upper screen frame 5 Set is wrapped with the sealing rubber ring 51 of a U-shaped profile channel-shaped on the connecting flange of upper end.

Further, the side internal groove side wall of corresponding lower section and the upper side of the collar flange 13 exist in the annular caulking groove 14 On same plane, the collar extension of the slotted collar 15 is closed the annular punching rail of the circle diameter to be formed and the annular caulking groove 14 The diameter of mark matches, ring body winding up one of the depth and width of rebate of the annular caulking groove 14 with the slotted collar 15 The whole cross-sectional diameter that the layer sieve 12 is formed matches, and the axial height of the garter spring 16 is no more than the annular caulking groove 14 width of rebate.And then it enables to form a whole between the annular rack 11 and collar flange 13 and garter spring 16 The at L-shaped structure in cross section, the collar flange 13 and the garter spring 16 are folded in corresponding two axial directions and are mutually butted Connecting flange 8 between, so that the wire side for the sieve 12 set that makes to stretch tight on the annular rack 11 and the annular rack 11 is upper Shen enters and flushes in the middle screen frame 4 or upper screen frame 5 of axial top with the downside of discharge port 7 together at end, convenient for discharging.

It is enclosed in addition, being located at pad on the sieve 12 and being clipped in the annular caulking groove 14 with the marginal portion other than slotted collar 15 It is pierced by around 15 backrush of slotted collar between the slotted collar 15 and garter spring 16, the marginal portion of the sieve 12 is formed 360 degree of structures being wrapped in the slotted collar 15, the sieve being piercing between the slotted collar 15 and garter spring 16 12 marginal portion is overturn again to be covered on the upper surface of the garter spring 16, and the garter spring 16 is with collar flange 13 in installation sandwiched Before between the connecting flange 8 being axially mutually butted to corresponding two, first set wraps up in a cross on the garter spring 16 and collar flange 13 Section is in U-shape the sealing rubber ring 17 of channel-shaped, and the opening of U-lag shape is located on radially inner side wall on the sealing rubber ring 17, described The two sides cell wall of U-lag is respectively coated by the upper surface in the garter spring 16 and the downside of collar flange 13 on sealing rubber ring 17 On, by 12 edge backrush of sieve extra outside annular caulking groove 14 in the slotted collar 15, then it is radial by the garter spring 16 Cuff corresponds to the notch position of the annular caulking groove 14 in the radial outside of the annular rack 11, makes the edge of the sieve 12 By overturning convolution winding up several times in inlay card and annular caulking groove 14, will not be slipped because of the pullling power of wire side, it can be into one Step increases the stability of pulling-over structure.

In each middle screen frame 4 it is co-axially fixed be connected with one be in back taper tubular feed back disk 41, inversed conical drum The cone feather edge of the feed back disk 41 of shape is fixedly connected on the position on the inner sidewall of the middle screen frame 4 close to upper end, described The semi-cone angle of feed back disk 41 is 80-84 degree, and vertex of a cone edge (the lower section side of the i.e. described feed back disk 41 on the feed back disk 41 Edge) and lower screens 12 between have punishment in advance gap, the feed back disk 41 be used for screen out upper screen 12 fines put together The intermediate position for falling in lower screens 12 avoids not screened after directly falling near discharge port 7 be expelled directly out.

Especially as shown in Figure 2, on the collar flange 13 around central axis circular array be provided with to It wears for few three and connects hole (this is conventional structure, therefore the number of not marking on a map in figure), the lower end surface and at least three of the garter spring 16 The screw wears the corresponding position in connection hole and offers threaded connection hole 161 respectively, connects hole and screw thread per corresponding described wear It is worn in connecting hole 161 and is connected to a screw 18, for the Screen assemblies 10 to be installed to corresponding bottom sieve frame 3 and middle sieve It is preceding between frame 4 and upper screen frame 5 further to be fixed, prevent the garter spring 16 from falling off from the cyclic annular rack 11.

In summary, the technical solution of the utility model sufficiently effective can complete above-mentioned purpose of utility model, and The structural principle and the principle of work and power of the utility model have all adequately been verified in embodiment, and can reach expected function Effect and purpose, and the embodiments of the present invention can also be converted according to these principles, therefore, the utility model includes one Cut all replacement contents being previously mentioned in range in claim.Any institute in present utility model application the scope of the patents The equivalence changes of work, all within the scope of the patents of category this case application.

Claims (8)

1. a kind of spin vibration sieve of Novel screen stretching structure comprising pedestal, vibration mounting, bottom sieve frame, several middle screen frames, upper screen frame with And sieve top cover, the bottom sieve frame, several middle screen frames, upper screen frame and sieve top cover from the bottom to top successively it is axially stacked be mounted on it is described On vibration mounting, the axial ends of the bottom sieve frame, several middle screen frames and upper screen frame all has connecting flange, the bottom sieve A Screen assemblies are mounted between the connecting flange that every two is axially docked in frame, several middle screen frames and upper screen frame, it is special Sign is: the Screen assemblies include annular rack and the taut sieve for being located at the annular rack upper surface, the sieve Edge is to one side to overturn of external annulus of the annular rack, and the outer diameter of the annular rack is plus overturning to external annulus surrounding The sum of screen thickness and the internal diameter of the upper screen frame match, radial convex is equipped with one on the lower end outer ring surface of the annular rack Loop flange, one end for intersect with the collar flange upper side offers annular embedding on the external annulus of the annular rack Slot, the compatible slotted collar for being embedded with an elasticity in the annular caulking groove, the sieve, which turns over, goes to the corresponding annular The part pad of caulking groove is clipped between the annular caulking groove and slotted collar, and the radial outside of the annular rack is arranged with one and reclines In the garter spring of the collar flange upper side, the internal diameter of the garter spring and the outer diameter of the annular rack match, the garter spring Outer diameter it is identical as the outer diameter of the collar flange, and the axial height of the garter spring is more than the notch center of the annular caulking groove The height of position.

2. the spin vibration sieve of Novel screen stretching structure as described in claim 1, it is characterised in that: corresponding lower section in the annular caulking groove Side internal groove side wall and the collar flange upper side in the same plane, the collar extension of the slotted collar is closed the circle to be formed Ring diameter and the diameter of the annular punching track of the annular caulking groove match, the depth and width of rebate of the annular caulking groove The whole cross-sectional diameter formed with one layer of the ring body winding up of the slotted collar sieve matches, the axis of the garter spring Width of rebate to height no more than the annular caulking groove.

3. the spin vibration sieve of Novel screen stretching structure as claimed in claim 2, it is characterised in that: be located at pad on the sieve and be clipped in institute State marginal portion other than annular caulking groove and slotted collar around the slotted collar backrush from the slotted collar and garter spring it Between be pierced by, the marginal portion of the sieve forms 360 degree of structures being wrapped in the slotted collar, is piercing in the open card The marginal portion of the sieve between ring and garter spring is overturn again to be covered on the upper surface of the garter spring, the garter spring and ring-type Flange is folded between corresponding two connecting flanges being axially mutually butted, and the garter spring is wrapped with set on collar flange The sealing rubber ring of one U-shaped profile channel-shaped, the opening of U-lag shape is located on radially inner side wall on the sealing rubber ring, described The two sides cell wall of U-lag is respectively coated by the upper surface of the garter spring and the downside of collar flange on sealing rubber ring.

4. the spin vibration sieve of Novel screen stretching structure as claimed in claim 3, it is characterised in that: the bottom sieve frame, several middle screen frames And discharge port is offered on the screen frame side wall of upper screen frame, it is provided with feeding port in the middle part of the sieve top cover, and from the bottom to top The bottom sieve frame, corresponding installation between the connecting flange that every two is axially mutually butted in several middle screen frames and upper screen frame The aperture of sieve described in each Screen assemblies is gradually increased from the bottom to top.

5. the spin vibration sieve of Novel screen stretching structure as claimed in claim 4, it is characterised in that: the pedestal is cylindrical, and circle Radial convex is equipped with cricoid connection ring flat-plate in the upper end outer axial face of the pedestal of tubular, surrounds central axis on the connection ring flat-plate Line circular array is fixedly installed multiple vibrating springs, and the vibration mounting is in the form of annular discs, the discoid vibration branch The seat upper end that is fixedly connected on the multiple vibrating springs coaxial with the pedestal, the middle part fixed setting of the vibration mounting There is a vibrating seat, a vertical vibrating motor, the connecting flange and circle of bottom sieve frame lower end are fixedly installed in the vibrating seat The axially matching fitting of the edge of vibration mounting described in plate-like, the connecting flange of bottom sieve frame lower end and the discoid vibration branch The V-shaped connection beam ring in a cross section is socketed on the edge of seat.

6. the spin vibration sieve of Novel screen stretching structure as claimed in claim 5, it is characterised in that: the bottom sieve frame, several middle screen frames And the V-shaped connection beam ring in a cross section is socketed on the connecting flange that every two is axially docked in upper screen frame, it is described The upper end connecting flange of upper screen frame is mutually matched with the edge of sieve top cover and is bonded, and the upper end connecting flange and sieve of the upper screen frame push up Also the V-shaped connection beam ring in a cross section is socketed on the edge of lid, wherein on the upper end connecting flange of the upper screen frame Also set is wrapped with the sealing rubber ring of a U-shaped profile channel-shaped.

7. the spin vibration sieve of Novel screen stretching structure as claimed in claim 6, it is characterised in that: coaxial in each middle screen frame It is fixed be connected with one be in back taper tubular feed back disk, the cone feather edge of the feed back disk of back taper tubular is fixedly connected on Close to the position of upper end on the inner sidewall of the middle screen frame, the semi-cone angle of the feed back disk is 80-84 degree, and on the feed back disk Vertex of a cone edge and lower screens between have punishment in advance gap.

8. the spin vibration sieve of Novel screen stretching structure as claimed in claim 7, it is characterised in that: surround center on the collar flange Being provided with for axis circular array at least three wears and connects hole, and the lower end surface of the garter spring and at least three screws, which are worn, connects hole Corresponding position offers threaded connection hole respectively, per it is corresponding it is described wear to connect in hole and threaded connection hole to wear be connected to one Screw.