CN2334502Y - Blocking-resistant wearing-resistant sieve board - Google Patents

Abstract

The utility model relates to a blocking-resistant wearing-resistant sieve board which is matched with a vibration sieving device, composed of a sieve bar and a sieve frame. The utility model forms a wedge-shaped hole ladder-shaped structure. The sieve bar adopts the polyamine ester or the wearing-resistant elastic rubber to manufacture. A reinforcement connecting plate is valcanized on the lower surface of the sieve bar or at the position close to the lower surface. The sieve bar is connected with the sieve frame through the reinforcement connecting plate by the connection way of screw threads or the riveted connection. Because the sieve bar material has good elasticity, smooth surface, and high dimension and shape precision, and the wedge-shaped hole ladder-shaped structure is adopted, the hole blocking problem of the sieve plate is completely solved. Simultaneously the production technology of the sieve plate can be also simplified. The production cost is reduced.

Description

Anti-blocking wear-resisting sieve plate

The utility model relates to the anti-blocking wear-resisting sieve plate that uses on the vibrosieve equipment that a kind of vibrosieve coordinative composition of equipments uses, particularly sieve aperture easily stops up.

Because a variety of causes, the obstruction of sieve aperture often appears in sieve plate in the vibratory sieve course of work.After the sieve plate sieve pore blockade, because the reduction of sieve-plate aperture ratio, screening efficiency reduces, and can cause screening normally to carry out when serious.Whether sieve pore blockade, the structural behaviour of sieve plate is one of most important influence factor wherein, therefore, for solving the sieve pore blockade problem, people have carried out extensive work aspect the developmental research of sieve plate, and developed a series of novel sieve plates, this wherein uses wedged hole stage shape metal sieve plate and Polyurethane or wear-resisting elastic caoutchouc sieve plate preferably.The former is made up of antifriction metal (AFM) grating and low carbon-structural steel screen frame, grating be stairstepping overlap joint and with the screen frame assembly welding together, institute's sieve aperture of opening is from distance grating feeding end one segment distance on the grating, size increases gradually on the material movement direction, until the grating other end, open fully, because its shape resembles a wedge, therefore abbreviate wedged hole as.Grating hole raker tooth has certain gradient on thickness direction, can prevent that material from blocking in saturating sieve process.Material is in saturating sieve process as temporarily be stuck in the hole like this, then under the promotion of vibration force and follow-up material, material travels forward, because the increase of screen size, material will sieve thoroughly, as still not sieving thoroughly, because stair-stepping bridging arrangement between grating is eliminated the obstruction that gets stuck thereby material will be pushed out sieve aperture at the grating discharge end.Therefore this sieve plate is anti-blocking from structure really.But in actual use, because grating adopts the antifriction metal (AFM) material, the forming temperature height, in manufacturing process, be difficult to guarantee its surface quality and size and dimension precision, sieve the ever-changing of material shapes size thoroughly, therefore, stopping up still appears in sieve aperture inevitably during the actual use of the sieve plate of this structure in addition, particularly when the screening viscous material, the sieve pore blockade problem is still relatively more serious.And Polyurethane or wear-resisting elastic caoutchouc sieve plate, because material itself has certain elasticity, the while smooth surface, when being stuck in the sieve aperture as material, sieve plate under the effect of vibration force, has release action to material owing to self have elasticity.Therefore, material be difficult for to produce stops up, but since present used Polyurethane or rubber sieve plate be flat, and sealing around the sieve aperture, strain can't be given full play to.Therefore, when the screening viscous material, the sieve pore blockade phenomenon is still more serious, does not fundamentally solve the problem of sieve pore blockade.

The purpose of this utility model is exactly that a kind of novel anti-blocking wear-resisting sieve plate will be provided, and it can solve the blockage problem of sieve plate sieve aperture effectively.

The purpose of this utility model is achieved in that sieve plate basic structure still adopts the stepped bridging arrangement of wedged hole, but the grating employing has higher intensity and hardness, and the while has certain flexible Polyurethane again or wear-resisting elastic caoutchouc is made.Compare with the metal grating, because Polyurethane or elastomeric material rigidity are little, and can't directly connect reliably with screen frame, therefore, when grating is made, directly vulcanize reinforced company's fishplate bar of a structural steel material at the lower surface of grating or near the position of lower surface, be processed with screwed hole or rivet hole on this reinforced company's fishplate bar, after grating completes, be linked together with thread joined structure or riveted joint draw bail and screen frame by this reinforced company's fishplate bar.When adopting thread joined structure, set up reliable locking device, as coating locking binding agent in the threaded connection place or adopting stop washer etc., influence the normal use of sieve plate to prevent the loosening back of thread joined structure grating fall-out.Obviously, because this sieve plate has still adopted the wedged hole step structure, therefore,, has good anti-blocking performance from structure as preceding analysis.Grating adopts wear resistant elastic material to make, and compares with the antifriction metal (AFM) grating, has good springiness, any surface finish, and therefore shape and dimensional accuracy advantages of higher can solve the susceptible to plugging problem of similar metal sieve plate sieve aperture substantially.On the other hand, even material has stopped up sieve aperture in the vibratory sieve course of work, because the grating elastic properties of materials is good, particularly raker tooth discharge end in grating hole is a free state, its Free Transform ability will be more many greatly than the deformability of the flat rubber sieve plate of sealing around the sieve aperture, therefore, under inertial oscillation power and material impact force action, distortion appears in the grating tooth, the material that stops up is played great relaxation effect, material can break away from sieve aperture in view of the above, realizes sieve thoroughly, thereby can fundamentally solve the blockage problem of sieve plate sieve aperture.

The utility model is by changing the metal grating into Polyurethane or wear-resisting elastic caoutchouc grating and directly vulcanize a structural steel reinforced company fishplate bar in grating, promptly realized the production of stepped Polyurethane of wedged hole or wear-resisting elastic caoutchouc sieve plate, so production technology is very simple, the Mould Machining expense greatly reduces.Simultaneously, the thread joined structure that has locking device or the rivet draw bail that are adopted between grating and the screen frame were both practical, and be simple and reliable again, overcome the problem that grating is out of shape and ftractures in the metal sieve plate welding process.In addition,, both guaranteed that sieve plate had good anti-blocking permeability energy, also had good abrasion resistance simultaneously owing to adopted Polyurethane or wear-resisting elastic caoutchouc as the grating material.

The concrete structure of utility model is provided by following embodiment and accompanying drawing.

Fig. 1 is along the observed sieve plate vertical view of Fig. 2 arrow A direction according to the anti-blocking wear-resisting sieve plate that the utility model proposes.Fig. 2 is the view of cutaway view behind the rotation alpha angle of being got along Figure 1A-A face, the inclination angle when the α angle among the figure is the vibration sieve plate installation.Fig. 3 is the partial enlarged drawing at Fig. 2 A position.

(1) among the figure is a grating, is made by Polyurethane or wear-resisting elastic caoutchouc, and wedged hole (7) is arranged on it, and a structural steel reinforced company fishplate bar (2) is arranged in the grating bottom, and screwed hole (3) is arranged on plate (2).The sieve plate frame is made up of sieve plate frame steel plate (4) and screen frame strengthened connection bar (5), both require to weld together with screen frame in advance according to the installation site of grating, strengthened connection bar among the figure (5) is the angle bar shape, can guarantee the bulk strength of screen frame effectively and to the support strength of grating.Joint bolt (6) is by reinforced company's fishplate bar (2), screwed hole (3) on strengthened connection bar (5) and (2) is linked together grating and screen frame, scribble chemical locking binding agent in the thread connection section, can prevent the loosening of attachment screw after the adhesive cures effectively, guarantee the safe and reliable work of sieve plate.

Claims (7)

1, a kind of anti-blocking wear-resisting sieve plate of vibrosieve coordinative composition of equipments use is made up of grating (1) and screen frame, stepped the overlapping of grating (1), some wedged holes (7) are arranged on every grating, it is characterized in that grating made by Polyurethane or wear-resisting elastic caoutchouc, at the grating lower surface or near the lower surface position one reinforced company's fishplate bar (2) is arranged, this reinforced company's fishplate bar and grating body directly sulfide when grating is made, and grating is linked together by this reinforced company's fishplate bar and screen frame assembling.

2, sieve plate according to claim 1 is characterized in that adopting thread joined structure between grating reinforced company fishplate bar (2) and the screen frame.

3, sieve plate according to claim 1 is characterized in that adopting between grating reinforced company fishplate bar (2) and the screen frame riveted joint draw bail.

4, sieve plate according to claim 1 is characterized in that the adjacent grating overlap lap of splice is 4～50 millimeters, and 0～30 mm distance is arranged on the overlap height direction.

5, sieve plate according to claim 1, the breaking strength that it is characterized in that used Polyurethane of grating or wear-resisting elastic caoutchouc is 15～80MPa, and percentage elongation is 200～1000%, and shore hardness is A60-D80.

6,, it is characterized in that the used material of grating reinforced company fishplate bar (2) is a structure steel material according to claim 1,2 or 3 described sieve plates.

7, sieve plate according to claim 1 is characterized in that grating wedged hole (7) has 0～40 ° key groove at opening direction.

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