CN209968851U - Screening machine - Google Patents

Abstract

The utility model discloses a screening machine relates to letter sorting equipment technical field. The screening machine comprises a rack and at least two screen groups distributed in a stepped manner, wherein the at least two screen groups sequentially receive materials, each screen group comprises a plurality of rotating shafts and screen discs, the rotating shafts are rotatably connected with the rack, and the rotating shafts are arranged at equal intervals; a plurality of sieve trays are arranged on the rotating shaft at intervals, the outline shape of each sieve tray is arc triangle, and the axial projections of the sieve trays along the rotating shaft are not completely overlapped. In the screening machine, multiple screening can be realized at one time through at least two screen groups in stepped distribution, the screening effect is improved, and the height difference exists between the adjacent screen groups, so that the material is favorably dispersed; the sieve tray with the arc triangle outline can enable the materials to be transferred in a jumping way, so that the materials are dispersed more uniformly, and the blockage or the winding on a sieve group is avoided; the axial projections of a plurality of sieve trays on the same rotating shaft are not completely overlapped, so that the materials are rolled and dispersed, and the more sufficient screening of the sieve group is facilitated.

Description

Screening machine

Technical Field

The utility model relates to a letter sorting equipment technical field especially relates to a screening machine.

Background

With the development of society, people's awareness of environmental protection is continuously deepened and improved, and more attention is paid to the recycling of wastes. After the waste is recycled, the waste needs to be classified so as to reasonably utilize various waste resources.

In the process of recycling solid waste, material classification needs to be realized through screening. Conventional screening machines may be classified into drum type screening machines, vibratory screening machines, and roller type screening machines. In a drum-type screening machine and a vibrating screening machine, screen holes are easy to block, the cleaning work after material blocking and winding is difficult, and the labor intensity is high; materials in the roller type screening machine and the vibration type screening machine are not uniformly rolled in the screening process, and the screening efficiency is low due to simple vibration or the passing of a roller.

Therefore, there is a need for a screening machine to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screening machine can reduce and block up the probability, and the material is looser, and screening effect is good.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a screening machine, includes the frame, still includes at least two sieve groups that are the ladder distribution, and at least two sieve groups accept the material in proper order, sieve group includes:

the rotating shafts are rotatably connected with the rack and are arranged at equal intervals; and

the screen tray, the interval is provided with a plurality ofly in the pivot the screen tray, the profile shape of screen tray is arc triangle-shaped, and is same it is epaxial a plurality of screen tray is followed the axial projection of pivot is incomplete coincidence.

And two adjacent sieve trays at corresponding positions on the rotating shafts are arranged oppositely.

The sieve trays comprise a first tray body and a second tray body, the first tray body and the second tray body are distributed in a stepped mode, and in two corresponding sieve trays on two adjacent rotating shafts, the arrangement directions of the first tray body and the second tray body are opposite.

Wherein, the inclination angle of two sieve trays in the corresponding position on two adjacent pivots is the same.

Wherein the screen pack further comprises:

and the spacing rings are detachably sleeved on the rotating shaft and are positioned between two adjacent sieve trays.

The space ring comprises a plurality of arc-shaped pieces, and the arc-shaped pieces are spliced to form the space ring.

Wherein, the projection parts of two adjacent sieve groups along the vertical direction are overlapped.

Wherein the screen group in front of the conveying is provided with a beating mechanism above one end near the rear of the conveying, the beating mechanism being configured to beat the material lifted by the screen group behind the conveying.

Wherein, one side of the flapping mechanism facing the front of the transmission is convexly provided with a flapping block;

the beating block is a cone.

Wherein, beater mechanism's inclination is adjustable and/or beater mechanism and transmission the place ahead the distance between the sieve group is adjustable.

The flapping mechanism comprises a first plate and a second plate which are hinged, and the first plate is connected with a frame of the screening machine;

a first driving assembly is arranged on the first plate and connected with the second plate, and the first driving assembly is configured to drive the second plate to rotate relative to the first plate;

a second driving assembly is arranged on the frame of the screening machine and is configured to drive the first plate to horizontally move and/or lift.

Wherein, the screening machine still includes the fishback, every the one end that the sieve group is close to the transportation place ahead is provided with the fishback, the fishback is configured to clear up the sieve dish.

Has the advantages that: the utility model provides a screening machine. In the screening machine, multiple screening can be realized at one time through at least two screen groups in stepped distribution, the screening effect is improved, and the height difference exists between the adjacent screen groups, so that the material is favorably dispersed; the sieve tray with the arc triangle outline can enable the materials to be transferred in a jumping way, so that the materials are dispersed more uniformly, and the blockage or the winding on a sieve group is avoided; the incomplete coincidence of last a plurality of sieve trays of same pivot along axial projection makes the sieve group go up different materials, and the angle of the sieve tray of contact is different, and the atress is different, and corresponding jumping direction also can be different with transmission direction for the material rolls, the dispersion aggravation, is favorable to sieve group more abundant screening.

Drawings

Fig. 1 is a schematic structural diagram of a screening machine according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a screen assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a sieve tray according to an embodiment of the present invention;

fig. 4 is a schematic structural view illustrating the engagement of two rotating shafts in a sieve set according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a spacer according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a screening machine provided by the second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a flapping structure provided by the second embodiment of the present invention;

fig. 8 is a second schematic structural view of a flapping structure provided in the second embodiment of the present invention;

fig. 9 is a schematic structural diagram of a comb plate provided in the second embodiment of the present invention.

Wherein:

1. a frame; 11. a first screening chamber; 12. a second screening chamber; 13. a third screening chamber; 2. a screen group; 21. a rotating shaft; 22. a sieve tray; 221. a first tray body; 222. a second tray body; 23. a space ring; 231. an arcuate member; 24. a rotating wheel; 241. a first runner; 242. a second runner; 3. a flapping mechanism; 31. a first plate; 32. a second plate; 33. beating blocks; 34. a first cylinder; 35. a second cylinder; 4. a comb plate; 41. a fixing plate; 42. comb teeth; 421. a tooth socket.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

This embodiment provides a screening machine, can sieve solid material. As shown in fig. 1, the screening machine comprises a frame 1, a plurality of screening cavities which are communicated in sequence are arranged in the frame 1, a screen group 2 is arranged in each screening cavity, and the screen groups 2 bear materials and transmit the materials. The screening chamber can guarantee that the material that is less than the screening hole of sieve group 2 falls by the screening hole in the material transmission process, is the undersize material, and the material that is greater than the screening hole of sieve group 2 continues to be transported forward, is the oversize material.

Traditional screening is concentrated, a certain amount of theoretical undersize materials exist on the screen group 2, secondary or multiple sorting is needed, screening is discontinuous, and efficiency is low. In this embodiment, be provided with a plurality of sieve group 2 in the screening machine, can once only carry out a lot of screening to the material, sieve more fully, select separately effectually. Alternatively, the size of the screening holes of the plurality of screen groups 2 may be different, for example the screening holes of the plurality of screen groups 2 may be sequentially increased, so as to realize the layered screening according to the size of the material.

In this embodiment, three screen groups 2 are provided, and the number of the corresponding screening chambers is also three. In particular, the screening chambers are, in the direction of transport of the material, a first screening chamber 11, a second screening chamber 12 and a third screening chamber 13 in sequence, in other embodiments two, four or more screening groups 2 may be provided. Alternatively, the distance between two adjacent screen groups 2 may be set according to actual conditions.

In the screening process, due to the fact that the materials are stacked, wound or bonded, part of the materials which should fall will be continuously conveyed on the screen group 2, and accurate screening cannot be achieved. For this reason, in this embodiment, a plurality of sieve group 2 can be the ladder distribution for the material has certain whereabouts distance when conveying between adjacent sieve group 2, is favorable to the material to be broken up, and the material is more even that distributes on sieve group 2, so that sieve better, sieve effectually.

In order to make the structure of the sieving machine relatively compact, the projection parts of two adjacent sieve groups 2 along the vertical direction are overlapped. That is, the end of the screen group 2 located in front of the screen group is located above the end of the screen group 2 located behind the screen group, so that not only the occupied space of the screening machine can be reduced, but also the material can be prevented from falling down from the gap between the two screen groups 2, and the screen group 2 located behind the screen group can better receive the material.

In the prior art, the screening holes are easy to block, the cleaning work after the material is blocked and wound is difficult, and the labor intensity is high; and the materials are not uniformly rolled in the screening process, and the screening efficiency is low by simple vibration or a roller.

In order to solve the above problem, as shown in fig. 2, the screen group 2 includes a plurality of rotating shafts 21 arranged in parallel, the rotating shafts 21 are rotatably connected to the frame 1, and the plurality of rotating shafts 21 are arranged at intervals. A plurality of sieve trays 22 are fixedly arranged on the rotating shaft 21 at intervals, and the sieve trays 22 can rotate along with the rotating shaft 21. The gaps between adjacent spindles 21 form screening holes. When the screening machine works, materials are placed on the screen group 2, the rotating shaft 21 in the screen group 2 rotates, and in the rotating process of the rotating shaft 21 and the screen disc 22, the materials are pushed to move towards the front of transmission. In the material moving process, materials of different sizes and shapes are stressed differently, so that the materials are gradually dispersed, the materials with smaller sizes fall down from the screening holes, and the materials with larger sizes are further conveyed.

In order to avoid material clogging or becoming entangled in the screen packs 2, in the present embodiment, the profile of the screen discs 22 is in the shape of an arc triangle, as shown in fig. 3. The arc triangle is also called a reuleaux triangle or a circular arc triangle. The center of the arc triangle is located on the axis of the rotating shaft 21, and when the sieve tray 22 rotates along with the rotating shaft 21, the motion tracks of the three top corners of the sieve tray 22 are overlapped and are circular.

When the screen group 2 works, the surface of the material on the screen group is acted by the arc triangular screen disc 22, the material flows in a jumping manner along the transmission direction of the screen group 2, the material is more easily dispersed, the material is ensured to roll more uniformly, and the screening effect is good. And the even material that rolls is favorable to making less material drop by the screening hole still, and great material will jump the formula transmission, avoids blockking up or twine on sieve group 2 to intensity of labour when reducing the staff and clearing up sieve group 2.

For better material dispersion, the projections of the sieve trays 22 on the same rotating shaft 21 along the axial direction of the rotating shaft 2 do not completely coincide, i.e. the positions of the top corners of different sieve trays 22 are different. Through the different inclination who sets up sieve tray 22 for the effort of the sieve tray 22 that different materials received is different, and on the basis that the original orbit of material is different, the material is also different at jumping direction and transmission direction under the effect of sieve tray 22, makes the material roll, the dispersion aggravation, is favorable to sieve group 2 more abundant screening.

Optionally, a plurality of sieve trays 22 on the same pivot 21 can be by one end to the other end along clockwise or anticlockwise rotation appointed angle in proper order, can make each angular position all have the apex angle of sieve tray 22 on the pivot 21, and the apex angle plays the key role to the propelling movement of material. Through staggering the apex angle position of each sieve tray 22, can improve along the homogeneity of pivot 21 axial material propelling movement, be favorable to the material dispersion to abundant screening. Alternatively, the difference between the rotation angles of two adjacent sieve trays 22 on the same rotating shaft 21 may be 20-30 °.

In this embodiment, the sieve tray 22 may be detachably connected to the rotating shaft 21. When one or more sieve trays 22 are worn and can not be used, only the damaged sieve trays 22 can be replaced, the operation is convenient, and the maintenance cost is low. Alternatively, the sieve tray 22 and the rotating shaft 21 may be detachably connected by a key.

In order to axially position the sieve trays 22 so as to ensure the distance between adjacent sieve trays 22, a plurality of spacer rings 23 are further arranged on the rotating shaft 21, and two adjacent sieve trays 22 are arranged at intervals through the spacer rings 23.

In this embodiment, the two sieve trays 22 at corresponding positions on the two adjacent rotating shafts 21 are arranged oppositely, and the gap between the two oppositely arranged sieve trays 22 is small, so long as the two sieve trays 22 are not interfered to rotate along with the rotating shafts 21. Through just setting up sieve tray 22, and the adjustment clearance, can avoid the material card in the gap between two sieve trays 22 to avoid sieve group 2 to block up, reduce the fault rate of sieve group 2.

In order to further prevent the material from winding on the sieve tray 22, the inclination angles of the two rotating shafts 21 at the corresponding positions on the two adjacent rotating shafts 21 are the same. When two sieve trays 22 of the same inclination rotate synchronously, the minimum distance between the two sieve trays 22 can be ensured to be kept unchanged all the time, which is beneficial to reducing the probability of material blockage or screen group 2 winding in the whole sieving process, thereby reducing the failure rate.

In order to improve the self-cleaning ability of the sieve tray 22, as shown in fig. 3 and 4, the sieve tray 22 may have a stepped structure in the thickness direction. Specifically, the sieve tray 22 includes a first tray body 221 and a second tray body 222 which are distributed in a stepped manner, and the cross-sectional area of the first tray body 221 is larger than that of the second tray body 222. In two corresponding sieve trays 22 on two adjacent rotating shafts 21, the first tray body 221 and the second tray body 222 are arranged in opposite directions. Taking the direction shown in fig. 4 as an example, the first tray 221 on the left rotating shaft 21 is close to the lower end, the second tray 222 is close to the upper end, and correspondingly, the first tray 221 on the right rotating shaft 21 is close to the upper end, the second tray 222 is close to the lower end, that is, of the two opposite sieve trays 22, the first tray 221 on the left side is arranged opposite to the second tray 222 on the right side, and the second tray 222 on the left side is arranged opposite to the first tray 221 on the right side. Because the interval between two sieve trays 22 of relative setting is very little and invariable, at the two rotation in-process, sieve tray 22 can play the effect of link plate, scrapes to the material of the edge winding of another sieve tray 22 rather than the complex or adhesion to realize the self-cleaning of sieve tray 22, reduce the winding of material, reduce the probability that the screening hole is blockked up.

In order to achieve synchronous rotation of multiple shafts 21 in the same screen group 2, two rotating wheels 24 may be connected to the ends of the shafts 21 in this embodiment. In the screen group 2, a certain rotating shaft 21 can be connected with a driving part to serve as a driving shaft, and adjacent rotating shafts 21 are connected through a transmission chain matched with the rotating wheels 24, so that the rotating shafts 21 in each screen group 2 can synchronously rotate through the same driving part. Specifically, for convenience of description, the two rotating wheels 24 on the rotating shaft 21 are a first rotating wheel 241 and a second rotating wheel 242, and taking the two rotating shafts 21 shown in fig. 4 as an example, the first rotating wheel 241 on the rotating shaft 21 on the left side may be in transmission connection with a driving member, and alternatively, the driving member may be a motor, and the second rotating wheel 242 thereon is connected with the second rotating wheel 242 on the rotating shaft 21 on the right side through a transmission chain; the first rotating wheel 241 on the right rotating shaft 21 can be connected with the first rotating wheel 241 on another adjacent rotating shaft 21 through a transmission chain, and so on, so that the rotating shafts 21 are in transmission connection.

In this embodiment, a screening hole is formed between two opposite space rings 23 in two adjacent rotating shafts 21, and undersize materials fall through the screening hole. When the screening machine was used in practice, the size of screening hole in the size adjustment sieve group 2 according to the material of waiting to sieve to improve the screening effect. In order to improve the compatibility of the sieve group 2, in the present embodiment, the spacer 23 is detachably connected to the rotating shaft 21. By replacing the spacer 23 with different outer diameters, the size of the screening holes can be adjusted to match the size of the material.

As shown in fig. 5, the space ring 23 includes a plurality of arc-shaped pieces 231, and the plurality of arc-shaped pieces 231 are detachably connected and spliced to form the space ring 23, so as to realize the dismounting and mounting of the space ring 23. Alternatively, each spacer 23 may include two arcuate members 231, and the two arcuate members 231 may be connected by a fastener such as a screw. In other embodiments, the number of arcuate members 231 per cage 23 may also be three, four, or more.

Example two

The present embodiment provides a screening machine, which is different from the first embodiment in that, as shown in fig. 6, a beating mechanism 3 is disposed above one end of a lower-position conveying sieve group 2 of the screening machine, and a material lifted by the upper-position conveying sieve group 2 will hit the beating mechanism 3, so that the materials bonded together will be beaten up, and the materials are further dispersed.

As shown in FIG. 7, the surface of the beating mechanism 3 contacting with the material can be provided with a beating block 33 in a protruding way, and the material can collide with the protruding beating block 33 to be dispersed more easily. Alternatively, the beater block 33 may be a cone, such as a triangular pyramid, a rectangular pyramid, or the like.

Specifically, as shown in fig. 7 and 8, the beating mechanism 3 includes a first plate 31 and a second plate 32 connected to each other, the first plate 31 is connected to the frame 1 of the screening machine, the second plate 32 is disposed obliquely in the vertical direction for colliding with the raised material, and a beating block 33 is disposed on the second plate 32.

Because the height that jumps when different materials are transmitted on sieve group 2 is different, for better and the material contact of raising, beater mechanism 3's inclination is adjustable.

Specifically, a first plate 31 and a second plate 32 are hinged to each other, a first driving assembly is disposed on the first plate 31, and an output end of the first driving assembly is connected to the second plate 32 for driving the second plate 32 to rotate relative to the first plate 31. Alternatively, the first driving member may include a first cylinder 34, and the rotation of the second plate 32 relative to the first plate 31 is achieved by the extension and contraction of the first cylinder 34.

Optionally, the distance between the first plate 31 and the corresponding screen group 2 of the upper conveying level is adjustable for better impact with the material. Wherein the distance comprises a horizontal distance and/or a vertical distance.

In this embodiment, the flapping mechanism 3 further includes a second driving assembly, the second driving assembly is disposed on the frame 1 and connected to the first plate 31, and can drive the first plate 31 to move close to or away from the sieve group 2 located behind the transmission along the horizontal direction. Alternatively, the second driving assembly may include a second cylinder 35, and the horizontal movement of the tapping mechanism 3 is realized by the extension and contraction of the second cylinder 35.

In other embodiments, the second driving assembly may further include a third cylinder for driving the flapping mechanism 3 to ascend and descend.

Optionally, in this embodiment, as shown in fig. 9, the sieving machine further includes a comb plate 4. One section that every sieve group 2 is close to the transmission place ahead is provided with fishback 4, and fishback 4 can clear up the sieve tray 22 on the pivot 21 of foremost in the sieve group 2. Specifically, fishback 4 includes fixed plate 41 and pinion rack, and fixed plate 41 can be fixed in frame 1, is provided with a plurality of broach 42 on the pinion rack, and the clearance between the adjacent broach 42 forms tooth's socket 421, and the sieve tray 22 on the pivot 21 can be held to tooth's socket 421 to clear up sieve tray 22.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (12)

1. The utility model provides a screening machine, includes frame (1), its characterized in that still includes at least two sieve group (2) that are the ladder distribution, at least two sieve group (2) accepts the material in proper order, sieve group (2) include:

the rotating shafts (21) are rotatably connected with the rack (1), and the rotating shafts (21) are arranged at equal intervals; and

sieve tray (22), the interval is provided with a plurality ofly on pivot (21) sieve tray (22), the profile shape of sieve tray (22) is arc triangle-shaped, and is same a plurality of on pivot (21) sieve tray (22) are followed the axial projection of pivot (21) is incomplete coincidence.

2. The screening machine according to claim 1, characterized in that two screening disks (22) in corresponding positions on two adjacent rotating shafts (21) are arranged oppositely.

3. The screening machine according to claim 2, characterized in that the screening disks (22) comprise a first disk body (221) and a second disk body (222), the first disk body (221) and the second disk body (222) are distributed in a step shape, and in two corresponding screening disks (22) on two adjacent rotating shafts (21), the first disk body (221) and the second disk body (222) are arranged in opposite directions.

4. A screening machine according to claim 2, characterised in that the angle of inclination of two screening discs (22) in corresponding positions on two adjacent shafts (21) is the same.

5. The screening machine according to any one of claims 1 to 4, characterized in that the screen group (2) further comprises:

the partition rings (23) are detachably sleeved on the rotating shaft (21) and are positioned between two adjacent sieve trays (22).

6. The screen according to claim 5, characterized in that the spacer (23) comprises a plurality of arc-shaped pieces (231), the plurality of arc-shaped pieces (231) being spliced together to form the spacer (23).

7. A screening machine according to any one of claims 1-4, characterised in that the projections of two adjacent screen groups (2) in the vertical direction coincide.

8. A screening machine according to any one of claims 1-4, characterised in that the screen groups (2) located in front of the conveyor are provided with a beater mechanism (3) above one end near the rear of the conveyor, the beater mechanism (3) being configured to beat material lifted by the screen groups (2) behind the conveyor.

9. A screening machine according to claim 8, characterised in that the beater mechanism (3) is provided with a beater block (33) projecting towards the side of the conveying front;

the beating block (33) is a cone.

10. A screening machine according to claim 8, characterized in that the angle of inclination of the beater mechanism (3) is adjustable and/or the distance between the beater mechanism (3) and the screen group (2) before the transport is adjustable.

11. A screening machine according to claim 10, characterised in that the beater mechanism (3) comprises a first (31) and a second (32) hinged plate, the first plate (31) being connected to the frame (1) of the screening machine;

the first plate (31) is provided with a first driving assembly, the first driving assembly is connected with the second plate (32), and the first driving assembly is configured to drive the second plate (32) to rotate relative to the first plate (31);

a second driving assembly is arranged on the frame (1) of the screening machine and is configured to drive the first plate (31) to horizontally move and/or lift.

12. A screening machine according to any one of claims 1-4, characterized in that it further comprises a comb plate (4), each screen group (2) being provided with the comb plate (4) near the end of the transport front, the comb plate (4) being configured to clean the screen tray (22).

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