CN111871789A

CN111871789A - Mass center offset vibrating screen and using method

Info

Publication number: CN111871789A
Application number: CN202010579644.6A
Authority: CN
Inventors: 张进生; 张钟予; 张晓宇
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-11-03

Abstract

The invention discloses a mass center offset vibrating screen and a using method thereof, which solve the problem that the screening efficiency and the screening quality can not be ensured at the same time in the prior art, have the beneficial effects that the front section and the rear section of the screen have different amplitudes, the material accumulation can be avoided, and the screening quality is ensured, and the specific scheme is as follows: the utility model provides a mass center skew shale shaker, includes the sieve case, and the pan feeding side of sieve case is higher than the ejection of compact side setting, and the sieve incasement sets up the screen cloth, is fixed with vibrating motor in the top of screen cloth through sieve case lateral wall, and sieve bottom of the case portion sets up the quality control part with vibrating motor dislocation arrangement, and the distance between quality control part and the sieve case material feeding side is less than the distance between quality control part and the sieve case ejection of compact side.

Description

Mass center offset vibrating screen and using method

Technical Field

The invention relates to the field of mechanical equipment, in particular to a mass center offset vibrating screen and a using method thereof.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The existing more materials need to be screened, for example, sandstone aggregate needs to be screened, the sandstone aggregate is a main raw material for preparing concrete, and the purpose is very wide, wherein the machine-made aggregate is a product which is obtained by repeatedly crushing and screening stone raw materials and meets the requirement of particle size. The aggregate has large scale and wide material source, and can simultaneously meet the requirements of environment green development and the ever-increasing demand of sandstone aggregate.

The inventor finds that when the feeding speed of the existing vibrating screen which can be used for sand aggregate is high, the problem that material accumulation is easy to generate on the feeding side exists; moreover, when the screening efficiency is improved, the screening quality of the existing vibrating screen is reduced, and the grading quality and the screening efficiency of the sandstone aggregate in the production and processing process are affected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the mass center offset vibrating screen to solve the problem of low grading quality of the sandstone aggregate in the screening process and realize the synchronous improvement of the screening quality and the screening efficiency of the aggregate.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a mass center skew shale shaker, includes the sieve case, and the pan feeding side of sieve case is higher than the discharge side setting, and the sieve incasement sets up the screen cloth, is fixed with vibrating motor in the top of screen cloth through sieve case lateral wall, and sieve bottom of the case portion sets up the quality control part with vibrating motor dislocation arrangement to make the barycenter of sieve case be close to sieve case material feeding side and arrange, the distance between quality control part and the sieve case material feeding side is less than the distance between quality control part and the sieve case discharge side.

Foretell barycenter skew shale shaker, vibrating motor and quality control part dislocation arrangement, quality control part makes the barycenter of sieve case change, the line of action of the exciting force that makes the barycenter of sieve case and vibrating motor produce is not at same straight line, produce the skew, the sieve case has the rectilinear vibration around the vibration of swaying of barycenter and exciting force direction like this, this makes the amplitude of sieve case first half increase, latter half amplitude reduces, reach the result of variable amplitude, make the pan feeding side of sieve case be difficult for piling up, grit aggregate slip speed is fast, reduce through latter half amplitude, effectively guarantee screening quality.

In order to realize mass adjustability and amplitude adjustability of the mass adjustment members, the mass adjustment members comprise at least one group, and each group of mass adjustment members comprises a plurality of detachable masses.

The mass center offset vibrating screen comprises three groups of mass adjusting components, and the three groups of mass adjusting components can be arranged on the same straight line or two straight lines or three straight lines along the width direction of the screen box.

In order to avoid the accumulation of gravel aggregate on the feeding side, the mass adjusting part is positioned between the feeding side of the screen box and the vibrating motor.

A mass centre offset shaker as claimed in any preceding claim, wherein screen support means are provided within the screen box to support the screen.

As above, the center of mass offset vibrating screen, the screen cloth supporting part is including being fixed in the screen cloth fixed strip and the screen cloth tensioning regulation strip of the inside both sides of sieve case, screen cloth fixed strip and screen cloth tensioning regulation strip clamp the screen cloth, and have the screen cloth support frame through the support of sieve incasement wall in the below of screen cloth fixed plate, the screen cloth support frame is equipped with a plurality ofly for carry out certain support to the screen cloth from the screen cloth bottom.

According to the mass center offset vibrating screen, in order to conveniently adjust the tensioning degree of the screen, the screen tensioning adjusting strip is connected with the screen box in a locking mode through the bolts and the nuts, and the screen tensioning adjusting strip is arranged above the screen fixing strip.

The mass center offset vibrating screen comprises a screen box side plate and a screen box bottom plate, wherein the screen box side plate is arranged on two sides of the screen box in the length direction, the screen box bottom plate is arranged at the bottom of the screen box, the middle of the screen box side plate protrudes to support the vibrating motor through a motor supporting cross beam, and a hopper is arranged on one side of the screen box side plate, namely the discharge side of the screen box;

set up the baffle in the hopper, form two discharge gates, one of them discharge gate with the screen cloth intercommunication for collect the ejection of compact that does not sieve, another discharge gate and screen cloth below sieve case bottom plate intercommunication for collect the fine material after the screening, because of sieve case slope arranges, in the vibration process, the material progressively gets into the hopper.

According to the mass center offset vibrating screen, the screen box is supported through the first support frame and the second support frame, the first support frame is lower than the second support frame, the top ends of the two support frames are provided with the elastic parts, the elastic parts are connected with the two sides of the screen box through the connecting flanges, and the elastic parts play a certain buffering role.

In a second aspect, the present invention also provides a method for using the mass center offset vibrating screen, which comprises the following steps:

adjusting the quality of the quality adjusting part according to the screening quality effect of the sandstone aggregate to be screened, and fixing the quality adjusting part;

turning on a vibration motor, and pouring the gravel aggregate from the feeding side of the screen box;

screening the sandstone aggregate through a screen, and discharging through a discharge side of a screen box after screening is completed.

The beneficial effects of the invention are as follows:

1) according to the invention, through the arrangement of the whole vibrating screen, the vibrating motor and the mass adjusting part are respectively arranged above and below the screen box and are not in the same vertical plane, so that the centroid of the screen box and the action line of the exciting force are not on the same straight line, and the offset distance can be generated; the amplitude of the gravel aggregate entering the vibrating screen is large, so that the screening raw material is not easy to accumulate when being fed, the sliding speed is high, and the screening efficiency is improved; the amplitude of the rear half section of the screen box is small, and the screening quality is good.

2) The invention adjusts the number of the detachable mass blocks in the mass adjusting part through the object to be screened, further adjusts the amplitude generated by the vibrating screen, and meets the requirements of vibrating screening of different raw materials.

3) According to the invention, through the arrangement of the whole vibrating screen, the screening efficiency of the sandstone aggregate is improved under the condition of ensuring the production efficiency and the structural strength of equipment, meanwhile, the vibrating screen is compact in structure and small in occupied space, is not only used for screening the sandstone aggregate, but also can meet the requirement of rapid screening of quality and quantity guarantee of other raw materials, provides a new scheme and theoretical basis for the design and selection of the high-efficiency vibrating screen, and promotes the development of related industries.

4) According to the invention, through the arrangement of the screen adjusting part, the stretching relaxation of the screen is easily adjusted through the screwing action of the bolt and the nut on the screen tensioning adjusting strip and the side plate of the screen box, and meanwhile, the screen adjusting device ensures that the screen is convenient to replace in consideration of the fact that the screen belongs to an easily-worn part.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a perspective view of a mass-offset shaker of the present disclosure in accordance with one or more embodiments.

FIG. 2 is a second perspective view of a mass center offset shaker of the present invention, according to one or more embodiments.

Fig. 3 is a schematic view of a screen adjustment member according to one or more embodiments of the present invention.

FIG. 4 is a schematic view of a mass adjustment component of the present invention according to one or more embodiments.

In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the schematic is shown only schematically.

Wherein: 1-a first support frame; 2-a second support; 3-a rubber spring; 4-a support flange; 5-clamping the bolt; 6-clamping the nut; 7-spring retainer; 8-side plate support; 9-screening the box side plate; 10-sieve box plate; 11-sieve box bottom plate; 12-a motor support beam; 13-a vibration motor; 14-screen support; 15-screen tensioning adjusting strip; 16-screen mesh fixing strip; 17-a screen mesh; 18-a bottom plate lower support beam; 19-a gasket; 20-a removable mass; 21-a nut; 22-hopper.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.

As introduced by the background art, the invention provides a vibrating screen with a center of mass shift and a using method thereof, aiming at solving the technical problem that the screening efficiency and the screening quality of the vibrating screen in the prior art cannot be simultaneously ensured.

Example 1

In a typical embodiment of the invention, and as shown in figures 1 and 2, a centroid displaced shaker comprises a screen box supported by a base support means, the screen box having a screen 17 disposed therein with one side higher than the other, the screen box being elevated for feed and lowered for discharge.

The base supporting device comprises a first supporting frame 1, a second supporting frame 2, a rubber spring 3 and a supporting flange 7. Wherein, first support frame 1 sets for the distance setting with second support frame 2 interval, and the both all vertical settings, and first support frame 1 highly is less than the high setting of second support frame 2 to make the sieve case slope arrange.

The top ends of the first support frame 1 and the second support frame 2 are respectively provided with a rubber spring 3 so as to provide a certain buffer effect in the vibration process of the vibration motor; 3 tops of rubber spring set up spring seat circle 7, and sieve case curb plate 9 sets up and stretches the post outward, and support flange 4 is fixed with spring seat circle 7, and support flange and sieve case curb plate 9's the overhanging post link to each other, and spring seat circle 7's both sides have the draw-in groove, draw-in groove and the outer post block that stretches, and clamping bolt 5 and clamping nut 6 locking support flange 4.

In some examples, the first support frame 1 and the second support frame 2 each include a support leg, the support leg is disposed on an outer side of the screen box, a support bar is disposed at a bottom end of the support leg, the support bar is perpendicular to the support leg, and two support legs of the first support frame 1 and/or the second support frame are connected through the support bar.

Further, the sieve box comprises two side sieve box side plates 9 arranged along the length direction of the sieve box, a sieve box plate 10 connected with the sieve box side plates 9 is arranged on one side in the width direction of the sieve box, a sieve box bottom plate 11 is arranged at the bottom of the sieve box, the peripheral sides of the sieve box bottom plate 11 are respectively connected with the sieve box side plates 9 and the sieve box plate 10 to form a stable frame, and the sieve box bottom plate 11 is connected with the middle parts of the inner sides of the sieve box side plates, but not the bottom parts of the sieve box side plates; a bottom plate lower supporting beam 18 is arranged below the bottom plate 11 of the screen box, a plurality of bottom plate lower supporting beams 18 are arranged, and two ends of each bottom plate lower supporting beam 18 are connected to the side plates 9 of the screen box so as to stably fix the bottom plate lower supporting beams 18; a plurality of side plate supports 8 are arranged outside the side plates 9 of the screen box.

It will be appreciated that any two floor lower support beams 18 are disposed parallel to each other and any two side panel supports 8 are disposed parallel to each other.

The other side of the sieve box relative to the sieve box plate is provided with a hopper 22, a partition plate is arranged in the hopper to form two discharge ports, one of the discharge ports is communicated with the sieve screen, and the other discharge port is communicated with a sieve box bottom plate below the sieve screen.

Further, for the vibration screening, vibrating motors are required to be arranged, in the embodiment, the middle parts of the two screen box side plates 9 are both provided with protrusions which can be triangular protrusions or in other shapes, the motor supporting beam 12 is installed on one side of each protrusion, the motor supporting beam 12 is arranged in an inclined mode, a set space is reserved between the motor supporting beam 12 and the screen, correspondingly, the vibrating motors 13 are arranged in an inclined mode, specifically, in some examples, the two vibrating motors can be arranged, and the vibrating motors arranged in an inclined mode can avoid influences on movement of gravel aggregates.

In order to sieve materials, the position of the hopper 22 is lower than the position of the vibration motor 13, and the hopper 22 is arranged close to the first support frame, so that the materials are discharged at the position close to the screen box plate, and are gradually moved downwards after being subjected to vibration screening, and the materials are discharged through the hopper 22 at the lower position.

The screen box is internally provided with a screen, and particularly, the screen is supported by a screen supporting part which comprises a screen supporting frame 14, a screen fixing strip 16 and a screen tensioning adjusting strip 15.

As shown in fig. 3, the screen support frames 14 are installed between two side plates of the screen box, that is, the screen support frames 14 are arranged along the width direction of the screen box, and a plurality of screen support frames 14 may be provided, and adjacent screen support frames are arranged at a set interval; the screen cloth support frame 14 top both sides installation screen cloth fixed strip 16, screen cloth fixed strip 16 arranges along the inboard length direction of sieve case curb plate, support the screen cloth through the screen cloth fixed strip 16 of both sides, install screen cloth tensioning regulation strip 15 in the both sides of screen cloth, screen cloth tensioning regulation strip 15 is last, screen cloth fixed strip 16 is down, the two presss from both sides tight screen cloth 17, screen cloth tensioning regulation strip 15 is fixed mutually with the sieve case curb plate through bolt, nut, adjust the tensioning degree of screen cloth through the degree that the nut was screwed up.

The mass adjusting component is arranged on the bottom plate 11 of the screen box, the mass center of the screen box can be changed through the arrangement of the mass adjusting component, the mass adjusting component is positioned between the feeding side of the screen box and the vibrating motor 13, and the mounting positions of the mass adjusting component and the vibrating motor 13 are arranged in a staggered mode, so that the mass center of the screen box and the action line of the exciting force are not on the same straight line, and an offset distance is generated; the distance between the quality adjusting part and the screen box plate, namely the feeding side of the screen box, is smaller than the distance between the quality adjusting part and the hopper, so that the amplitude of the front half section and the rear half section of the screen box are different, the amplitude of the sandstone aggregate is large after the sandstone aggregate enters the vibrating screen, accumulation is not easy to generate, the sliding speed is high, and the screening efficiency is correspondingly improved; after entering the latter half of sieve case, the amplitude is little, effectively guarantees screening quality.

The mass adjustment components include at least one set, each set of mass adjustment components being disposed on the floor lower support beam 18. In this embodiment, referring to fig. 4, along the width direction of the bottom plate of the screen box, on the same straight line, three sets of mass adjusting components are provided, the distance setting is set at intervals between adjacent mass adjusting components, each set of mass adjusting component includes a plurality of detachable mass blocks 20, the plurality of detachable mass blocks can be stacked and sleeved on the bolts, the bolts pass through the bottom plate lower supporting beams 18 and the gaskets, the gaskets are provided on both sides of the mass adjusting components for supporting, the end portions of the bolts far away from the nuts and one sides of the corresponding gaskets are locked by the nuts, and the number of the detachable mass blocks 22 is adjusted according to actual needs.

When the number of the detachable mass blocks 22 is larger, the difference of the front and rear vibration amplitudes of the screen box is larger, the screening speed is increased, and the screening quality is slightly reduced.

Specifically, the detachable mass 22 is a circular plate with a circular hole in the middle for passing a bolt.

It will be appreciated that in other examples, the mass adjustment members comprise three sets, and the three sets of mass adjustment members may be disposed on the same straight line or on two straight lines, or on three straight lines along the width of the screen box.

Example 2

The method of using a centroid shifting shaker as described in example 1 comprising the steps of:

screening the sandstone aggregate through a screen, and discharging the sandstone aggregate through a screen box hopper after the screening is finished;

after the screen is used for a period of time, the screen tensioning adjusting strip is adjusted, the screen is loosened, and the screen can be replaced; after the replacement is finished, the screen is fixed.

In addition, it should be explained that the vibrating screen provided by the invention can be used for screening not only the sandstone aggregate, but also other materials.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a mass center skew shale shaker, its characterized in that, includes the sieve case, and the pan feeding side of sieve case is higher than the discharge side setting, and the sieve incasement sets up the screen cloth, is fixed with vibrating motor in the top of screen cloth through sieve case lateral wall, and sieve bottom of the case portion sets up the quality control part with vibrating motor dislocation arrangement to make the barycenter of sieve case be close to sieve case material feeding side and arrange, the distance between quality control part and the sieve case material feeding side is less than the distance between quality control part and the sieve case discharge side.

2. A mass-centric vibrating screen according to claim 1, wherein the mass-adjusting members comprise at least one set, each set comprising a plurality of removable masses.

3. A mass centre offset shaker as claimed in claim 1 or 2, wherein the mass adjustment members comprise three sets, the three sets of mass adjustment members being disposed on a common line or on two lines or on three lines across the width of the shaker casing.

4. A mass-centred offset shaker as claimed in claim 1, wherein the mass adjustment means is located between the feed side of the screen box and the shaker motor.

5. A mass centre offset shaker as claimed in claim 1, wherein screen support means are provided within the screen box to support the screen.

6. The centroid displaced vibration sieve as claimed in claim 5, wherein said sieve support member comprises a sieve fixing bar and a sieve tensioning adjusting bar fixed to both sides of the inside of said sieve box, said sieve fixing bar and said sieve tensioning adjusting bar clamping said sieve, and a sieve support frame supported by the inner wall of said sieve box below said sieve fixing plate.

7. The mass center offset shaker as in claim 6, wherein the screen tensioning adjustment bar is lockingly connected to the screen box by bolts and nuts, and the screen tensioning adjustment bar is disposed above the screen retention bar.

8. The mass center offset vibrating screen of claim 1, wherein the screen box comprises screen box side plates arranged at two sides of the screen box in the length direction and a screen box bottom plate arranged at the bottom of the screen box, the middle parts of the screen box side plates are raised to support the vibrating motor through a motor supporting beam, and a hopper is arranged at one side of the screen box side plates, namely the discharge side of the screen box;

set up the baffle in the hopper, form two discharge gates, one of them discharge gate with the screen cloth intercommunication, another discharge gate and screen case bottom plate intercommunication below the screen cloth.

9. The mass center offset shaker of claim 1, wherein the shaker basket is supported by a first support frame and a second support frame, the first support frame being positioned lower than the second support frame, and wherein the top ends of both support frames are provided with resilient members, the resilient members being connected to both sides of the shaker basket by connecting flanges.

10. A method of using a centroid-shifting shaker as claimed in any one of claims 1 to 9, comprising the steps of: